GleghornLab/Signor_2class · Datasets at Hugging Face

IdA string	IdB string	labels int64	mechanism string	effect string	score float64	sentence string	signor_id string
Q8N726	Q13535	1	phosphorylation	up-regulates activity	0.391	Regulation of NF-kappaB and p53 through activation of ATR and Chk1 by the ARF tumour suppressorInduction of ATR activity in Hs68 E2F1ER cells by endogenous ARF.	SIGNOR-134781
Q13489	Q13546	1	polyubiquitination	up-regulates activity	0.747	CIAP1/2 are direct E3 ligases conjugating diverse types of ubiquitin chains to receptor interacting proteins kinases 1 to 4 (RIP1-4).Together, our results demonstrate that depleting cIAP1/2 inhibits RIP1-4 mediated NF-kB activation without affecting RIP auto-phosphorylation.	SIGNOR-272713
P00533	Q86U44	0	transcriptional regulation	up-regulates quantity by expression	0.331	Here we find that METTL3 promotes translation of certain mRNAs including epidermal growth factor receptor (EGFR) and the Hippo pathway effector TAZ in human cancer cells.	SIGNOR-265954
O14965	P53350	1	phosphorylation	up-regulates	0.665	We find that aurora a (aurka) can directly phosphorylate plk1 on thr 210;activation of plk1 requires phosphorylation of a conserved threonine residue (thr 210).	SIGNOR-179422
P20823	Q9HAW8	1	transcriptional regulation	up-regulates quantity by expression	0.251	Using gel shift and functional assays, HNF1alpha was demonstrated to bind to and activate the UGT1A8, -1A9, and -1A10 promoters. In contrast, Cdx2 bound to and activated the UGT1A8 and -1A10 promoters but could not activate the UGT1A9 promoter.	SIGNOR-253971
P47712	Q05513	0	phosphorylation	up-regulates activity	0.327	To further evaluate cPLA2 as a candidate substrate for PKCζ, we developed a custom antibody recognizing the cPLA2 T376 phosphorylation site. Specificity was validated in both serum starved/stimulated samples	SIGNOR-277518
P20042	P49770	0	guanine nucleotide exchange factor	up-regulates activity	0.751	EIF2B converts the protein synthesis initiation factor 2 (eIF2) from an inactive GDP-bound form to an active eIF2-GTP complex owing to its guanine nucleotide exchange factor (GEF) activity.	SIGNOR-269130
Q5JRX3	P05067	1	cleavage	down-regulates activity	0.373	In the present study we have identified and characterized the human PreP homologue, hPreP, in brain mitochondria, and we show its capacity to degrade the amyloid beta-protein (Abeta). PreP belongs to the pitrilysin oligopeptidase family M16C containing an inverted zinc-binding motif. We show that hPreP is localized to the mitochondrial matrix. In situ immuno-inactivation studies in human brain mitochondria using anti-hPreP antibodies showed complete inhibition of proteolytic activity against Abeta.	SIGNOR-260661
P01308	Q8WZA2	0	relocalization	up-regulates quantity	0.377	Activation of EPAC2 has recently been shown to increase the density of insulin‐containing granules near the plasma membrane, facilitating insulin secretion from the β cells	SIGNOR-278140
Q96HE7	Q8IXL6	0	phosphorylation	up-regulates activity	0.2	We further show that ER oxidoreductin 1α (Ero1α), the pivotal sulfhydryl oxidase that catalyzes disulfide formation in the ER, is phosphorylated by Fam20C in the Golgi apparatus and retrograde-transported to the ER mediated by ERp44. The phosphorylation of Ser145 greatly enhances Ero1α oxidase activity and is critical for maintaining ER redox homeostasis and promoting oxidative protein folding.	SIGNOR-277395
P40763	P28482	0	phosphorylation	down-regulates activity	0.75	ERK2 phosphorylates Stat3 on three serine-containing peptides and decreases its tyrosine phosphorylation induced by EGF treatment.\|Here, we report that ERK2 activated by its upstream kinase, MEK1, represses Stat3 transcriptional activity induced by Src or Jak-2.	SIGNOR-279635
Q14683	Q13315	0	phosphorylation	up-regulates activity	0.705	Atm phosphorylates Smc1 on serines 957 and 966 in vitro and in vivo, and expression of an Smc1 protein mutated at these phosphorylation sites abrogates the ionizing irradiation-induced S phase cell cycle checkpoint	SIGNOR-255589
Q6NXT2	Q92830	0	acetylation	down-regulates activity	0.2	The HAT module within the SAGA and ADA complexes acetylates histone H3, mainly on residues K9 and K14.	SIGNOR-269608
O95453	P49137	0	phosphorylation	down-regulates	0.375	Mk2 phosphorylates parn, blocking gadd45_ mrna degradation. Parn can serve as a direct substrate for mk2, and demonstrating that ser-557 is the dominant mk2 phosphorylation site.	SIGNOR-168377
O15297	Q07812	1	dephosphorylation	down-regulates activity	0.2	34 In this study, a novel function of Wip1 was identified, that is, its ability to dephosphorylate directly and thus inactivate apoptotic BAX protein in response to gamma irradiation.\|To ascertain whether Wip1 dephosphorylates BAX, recombinant Wip1 was incubated with previously reported BAX-derived phosphopeptides containing Ser87, Ser163, Thr167, and Ser184 in an in vitro phosphatase assay. xref , xref Peptides containing phospho-Thr180 from p38 MAPK and phospho-Thr31 from UNG2 were used as a positive and negative control, respectively. xref As shown in xref , purified Wip1 did not dephosphorylate the four BAX-derived phosphopeptides.	SIGNOR-276993
P31995	P07948	0	phosphorylation	up-regulates activity	0.2	Fyn and Blk definitely phosphorylate Y-282 in the ITAM of FcgRIIa/c, whereas the non-ITAM tyrosine residue (Y-275) becomes phosphorylated by Syk, as the phosphorylation of double point mutants shows. In addition to these tyrosine residues, Fyn, Blk, and Syk might phosphorylate the most C-terminal tyrosine residue (Y-298) because altering this tyrosine residue together with one of the tyrosine residues clearly shown to be phosphorylated by the respective PTK results in the abrogation of phosphorylation	SIGNOR-262676
O14492	P04629	0	phosphorylation	up-regulates	0.547	Two substrates of trk kinases, raps and sh2-b. raps and sh2-b mediate trk signaling in developing neurons	SIGNOR-62619
Q96J87	P38936	1	post transcriptional regulation	up-regulates quantity by stabilization	0.2	CELF6 binds to the 3'UTR of p21 transcript and increases its mRNA stability. Depletion of CELF6 promotes cell cycle progression, cell proliferation and colony formation whereas overexpression of CELF6 induces G1 phase arrest.	SIGNOR-269044
Q9UIG0	Q16539	0	phosphorylation	up-regulates	0.2	Moreover, this region (wac domain) was also phosphorylated by recombinant proteins of p38_? And jnk2_? But not by akt1	SIGNOR-188160
P11413	P53350	0	phosphorylation	up-regulates activity	0.346	We find that Plk1 interacts with and directly phosphorylates glucose-6-phosphate dehydrogenase (G6PD). By activating G6PD through promoting the formation of its active dimer, Plk1 increases PPP flux and directs glucose to the synthesis of macromolecules.\|the kinase domain of Plk1 phosphorylates T406, T466 of G6PD	SIGNOR-267581
Q16539	Q16584	1	phosphorylation	down-regulates	0.304	Jnk and p38 mapk activation have antagonistic effects in many cases. From a mechanicistic point of view, the p38 mapk pathway can negatively regulate jnk activity at the level of map3ks, either by phosphorylating mlk3 or the tak1 regulatory subunit tab2	SIGNOR-166605
Q9GZU7	P78527	1	dephosphorylation	up-regulates activity	0.2	CTDSP1 activates DNA-PKcs and enhances DNA-PKcs dependent topoI degradation in response to irinotecan .\|Our novel finding indicates that CTDSP1 dephosphorylates DNA-PKcs, changes its kinase activity, and regulates irinotecan-induced topoI degradation.	SIGNOR-277101
O95644	Q08209	0	dephosphorylation	up-regulates	0.825	Calcineurin directly dephosphorylates nfat resulting in the nuclear import of nfat.	SIGNOR-176370
P30307	Q16539	0	phosphorylation	down-regulates activity	0.439	P38 binds and phosphorylates Cdc25B at serines 309 and 361, and Cdc25C at serine 216; phosphorylation of these residues is required for binding to 14-3-3 proteins.	SIGNOR-250091
P04083	Q96QT4	0	phosphorylation	up-regulates	0.544	Trpm7 was responsible for phosphorylation of the serine 5 (ser5) residue [29]. In 2009, the study focused on an association between anxa1 and trpm7 confirmed the presence of a trpm7/annexin a1/mg2_+ complex, suggesting a novel pathway in bradykinin signaling, dependent on pkc and c-src [30]. Even though that pathway is not fully characterized, the same team that discovered the ser5 phosphorylation of anxa1 also reported crucial relevance of this modification for anxa1 membrane binding and especially for the interaction between annexin a1 and its known partner, the calcium binding protein s100a11	SIGNOR-202804
P07949	Q8N4X5	1	phosphorylation	up-regulates activity	0.33	RET/PTC induced robust tyrosine phosphorylation of XB130, which promoted its subsequent association with the p85alpha subunit of phosphatidylinositol 3-kinase (PI 3-kinase). We identified tyrosine 54 of XB130 as the major target of RET/PTC-mediated phosphorylation and a critical binding site for the SH2 domains of p85alpha.	SIGNOR-263192
O43683	Q5FBB7	1	phosphorylation	up-regulates quantity by stabilization	0.2	Bub1 phosphorylates Sgo1 in the vicinity of its APC/C degrons in vitro.\|On the other hand, Bub1 targets PP2A to centromeres, which in turn maintains Sgo1 at centromeres by counteracting Plk1 mediated chromosome removal of Sgo1.	SIGNOR-278915
O60346	P31749	1	dephosphorylation	down-regulates	0.76	Here, we identify a protein_ phosphatase, ph domain leucine-rich repeat protein_ phosphatase_ (phlpp), that specifically_ dephosphorylates_ the hydrophobic motif of_ akt_ (ser473 in akt1), triggering_ apoptosis_ and suppressing_ tumor_ growth.	SIGNOR-252601
Q96E52	O60313	1	cleavage	up-regulates activity	0.604	YME1L cleaves OPA1 at S2 and S3 site to transform into L-OPA1 to induce fusion when cells are faced with increased oxidative phosphorylation, whereas OMA1 cleaves OPA1 at an S1 site to transform into S-OPA1, resulting in the fragmented response to cellular stress, mitochondrial dysfunction, or deletion of YME1L	SIGNOR-274139
Q04760	P09769	0	phosphorylation	up-regulates activity	0.2	We show that Glo1 activity is promoted by phosphorylation on Tyrosine 136 via multiple kinases. Glo1 Y136 is phosphorylated by multiple different kinases including all members of the Src family. Depletion of multiple different kinases led to a partial reduction in Glo1(Y136) phosphorylation. These included members of the Src family (Src, Yes1, FGR, and the related Abl1), and of the FAK, EPHA, FGFR, and VEGFR families (Figure 2B), suggesting phosphorylation of Glo1 on Y136 by multiple different kinases. In vitro kinase assays revealed that all the members of the Src family, as well as Epha5 and VEGFR3, can efficiently phosphorylate recombinant Glo1 on Y136 (Figure 2C–D).	SIGNOR-276188
P06493	P46937	1	phosphorylation	up-regulates activity	0.425	Our evidence suggested that these YAP sites (Ser138, Thr143, and Ser367) were CDK1 phosphorylation sites.\|These data demonstrate that the YAP phosphorylation sites Ser138, Thr143, and Ser367 are important for proper mitosis and cytokinesis.	SIGNOR-276587
Q15418	Q96RK0	1	phosphorylation	down-regulates	0.2	Specifically, 14-3-3 binds to p90(rsk)-phosphorylated ser?_??_ Of capic?_A thereby modulating dna binding to its hmg (high-mobility group) box, whereas erk phosphorylations prevent binding of a c-terminal nls (nuclear localization sequence) to importin ?4 (kpna3)	SIGNOR-169883
O00716	O14757	0	phosphorylation	up-regulates	0.328	These results suggest that e2f3a is directly phosphorylated by chk kinases and that the phosphorylation of serine 124 is required for the posttranslational induction of e2f3a protein by chemotherapy.	SIGNOR-161758
Q15052	P63000	1	guanine nucleotide exchange factor	up-regulates activity	0.623	ARHGEF6 is a Rho guanine nucleotide exchange factor for Rac1 and constitutively bound to GIT1. NO and PGI2 activate PKG and PKA, respectively and both kinases phosphorylate ARHGEF6 on Ser-684 and possibly on Ser-640. Phosphorylation of ARHGEF6 results in the assembly of a GIT1-ARHGEF6–14-3-3 complex. These changes might contribute to PGI2- and NO-mediated Rac1 inhibition.	SIGNOR-272167
P61088	P16104	1	ubiquitination	up-regulates	0.2	In an h2ax- and mdc1-dependent manner , rnf8/ubc13 complexes go to sites of dna damage through their fha domain and initiate the synthesis of k63 polyubiquitin chains on chromatin that recruit the brca1 a complex through the uim domains of rap80.	SIGNOR-159880
P06239	P04234	1	phosphorylation	up-regulates activity	0.571	Last, we demonstrate directly that members of the CD3 complex, including the gamma, delta, and epsilon chains, as well as a putative zeta subunit, can be phosphorylated at tyrosine residues by the CD4/CD8.p56lck complex.	SIGNOR-259929
P55085	P17655	0	cleavage	down-regulates activity	0.298	PAR1E and PAR2E (10 microM) were incubated in the presence of the different proteases \| The enzymes were used at the following concentrations: 0.5 unit/mL thrombin, 2.5 nM trypsin, 20 nM plasmin, 20 nM cathepsin G, 20 nM elastase, 20 nM proteinase 3, and 2 units/mL calpain I and II\|Protease-activated receptors (PARs) mediate cell activation after proteolytic cleavage of their extracellular amino terminus.\|Mass spectrometry studies of PAR2E predicted activation of PAR2 by trypsin through cleavage at the Arg36-Ser37 site, no effect of thrombin, and inactivation of the receptor by plasmin, calpain and leukocyte elastase, cathepsin G, and proteinase 3	SIGNOR-263581
O60260	Q9BXM7	0	phosphorylation	up-regulates	0.2	We show that human pink1 is specifically activated by mitochondrial membrane potential (??m) depolarization, enabling it to phosphorylate parkin at ser(65). We further show that phosphorylation of parkin at ser(65) leads to marked activation of its e3 ligase activity that is prevented by mutation of ser(65) or inactivation of pink1.	SIGNOR-197976
Q9UQM7	P14921	1	phosphorylation	down-regulates	0.309	Treatment of ets1 by t-cell nuclear extract or phosphorylation of these four serines by calmodulin-dependent kinase ii (camk ii) has recently been reported to decrease ets1 dna binding by reinforcing autoinhibition	SIGNOR-96334
O75197	O15169	1	relocalization	down-regulates quantity	0.83	Axin is a protein that interacts with the intracellular domain of LRP-5. LRP-5 active form bind Axin and induce LEF-1 activation by destabilizing Axin and stabilizing beta-catenin.	SIGNOR-236997
P23467	Q9UM73	1	dephosphorylation	down-regulates	0.334	Rptpbeta/zeta dephosphorylates alk at the site(s) in alk that is undergoing autophosphorylation through autoactivation.	SIGNOR-157175
P23246	P07101	1	transcriptional regulation	down-regulates quantity by repression	0.2	It has been reported that DJ-1 is a neuroprotective transcriptional co-activator that sequesters a transcriptional co-repressor polypyrimidine tract-binding protein-associated splicing factor (PSF) from the TH gene promoter.	SIGNOR-271697
P27361	P09917	1	phosphorylation	up-regulates activity	0.328	Intriguingly, a significant difference in the potency of nonredox-type inhibitors (but not of BWA4C) was determined between wild-type 5-LO and the mutant S271A/S663A-5-LO (lacking phosphorylation sites for ERK1/2 and MAPKAPK-2) in HeLa cells. Collectively, our data suggest that compared with Ca2+-mediated 5-LO product formation, enzyme activation involving 5-LO phosphorylation events specifically and strongly alters the susceptibility of 5-LO toward nonredox-type inhibitors in intact cells.	SIGNOR-264440
Q15418	O00418	1	phosphorylation	down-regulates activity	0.513	We show that two such kinases, p70 s6 kinase (regulated via mtor) and p90(rsk1) (activated by erk), phosphorylate eef2k at a conserved serine and inhibit its activity	SIGNOR-109708
P22681	P06241	0	phosphorylation	up-regulates activity	0.812	Fyn associates with cbl and phosphorylates tyrosine 731 in cbl, a binding site for phosphatidylinositol 3-kinasecbl represents a substrate for src-like kinases that are activated in response to the engagement of cell surface receptors, and that src-like kinases are responsible for the phosphorylation of a tyrosine residue in cbl that may regulate activation of phosphatidylinositol 3-kinase	SIGNOR-63968
Q16539	Q92945	1	phosphorylation	down-regulates activity	0.572	KSRP, an important factor for AU-rich element (ARE)-directed mRNA decay, undergoes p38-dependent phosphorylation during muscle differentiation. KSRP phosphorylated by p38 displays compromised binding to ARE-containing transcripts and fails to promote their rapid decay, although it retains the ability to interact with the mRNA degradation machinery	SIGNOR-235856
P51451	P31995	1	phosphorylation	up-regulates activity	0.2	Fyn and Blk definitely phosphorylate Y-282 in the ITAM of FcgRIIa/c, whereas the non-ITAM tyrosine residue (Y-275) becomes phosphorylated by Syk, as the phosphorylation of double point mutants shows. In addition to these tyrosine residues, Fyn, Blk, and Syk might phosphorylate the most C-terminal tyrosine residue (Y-298) because altering this tyrosine residue together with one of the tyrosine residues clearly shown to be phosphorylated by the respective PTK results in the abrogation of phosphorylation	SIGNOR-262673
Q13362-3	Q13315	0	phosphorylation	up-regulates activity	0.378	In the present study, we demonstrate that ataxia-telangiectasia mutated (ATM) directly phosphorylates and specifically regulates B56γ3, B56γ2 and B56δ, after DNA damage. We further show that phosphorylation of B56γ3 at Ser510 leads to an increase in B56γ3-PP2A complexes, and direction of PP2A phosphatase activity toward the substrate p53, activating its tumor-suppressive functions. we show that Ser510 phosphorylation significantly enhances the ability of B56γ3 to inhibit cell proliferation and anchorage-independent growth.	SIGNOR-276320
P22607	O43318	1	phosphorylation	up-regulates activity	0.293	Indeed, we found that TAK1 was tyrosine phosphorylated in HEK293 cells transiently expressing constitutively active FGFR3 (K650E), but not the kinase-dead receptor (K508M), indicating that activated FGFR3 can either directly or indirectly tyrosine phosphorylate TAK1 (XREF_FIG).	SIGNOR-279176
P12931	P55211	1	phosphorylation	up-regulates activity	0.373	As a result, we established that Src was able to directly phosphorylate caspase-9 at tyrosine 251, leading to elevated caspase-9 activity.	SIGNOR-272998
P49137	P27815	1	phosphorylation	down-regulates activity	0.347	Phosphorylation of cAMP-specific PDE4A5 (phosphodiesterase-4A5) by MK2 (MAPKAPK2) attenuates its activation through protein kinase A phosphorylation. In the present study, we show that PDE4A5 is phosphorylated at Ser147, within the regulatory UCR1 (ultraconserved region 1) domain conserved among PDE4 long isoforms, by MK2 (MAPK-activated protein kinase 2, also called MAPKAPK2). Phosphorylation by MK2, although not altering PDE4A5 activity, markedly attenuates PDE4A5 activation through phosphorylation by protein kinase A. This modification confers the amplification of intracellular cAMP accumulation in response to adenylate cyclase activation by attenuating a major desensitization system to cAMP.	SIGNOR-263078
Q5JVS0	Q05513	0	phosphorylation	down-regulates activity	0.292	We found a strong phosphorylation of Ki-1/57 by PKCalphabeta, PKCdelta, PKClambda/zeta, and especially by PKCsigma, however not by PKCmi. These data show that Ki-1/57 can serve in principal as a substrate for a wide variety of different PKC isoforms but also that its phosphorylation is strongest with PKCsigma. \| This suggests that the two threonine residues present in this fragment (Thr354 and Thr375) might be the main target residues for phosphorylation by PKC in vitro. \| Ki-1/57 Exits the Nucleus upon PMA Activation	SIGNOR-249257
O75581	Q9Y6M4	0	phosphorylation	up-regulates activity	0.288	Central to WNT signalosome formation is phosphorylation of LRP6 at multiple sites, with GSK3β phosphorylating LRP6 at S1490 and CK1 family members phosphorylating LRP6 at T1479 and T1493	SIGNOR-275401
Q96EB6	P45983	0	phosphorylation	up-regulates	0.601	Human sirt1 was phosphorylated by jnk1 on three sites: ser27, ser47, and thr530 and this phosphorylation of sirt1 increased its nuclear localization and enzymatic activity. Surprisingly, jnk1 phosphorylation of sirt1 showed substrate specificity resulting in deacetylation of histone h3, but not p53.	SIGNOR-162314
O60674	Q14457	1	phosphorylation	up-regulates activity	0.297	Mechanistically, IL-6 triggers the interaction between JAK2 and BECN1, where JAK2 phosphorylates BECN1 at Y333. We demonstrate that BECN1 Y333 phosphorylation is crucial for BECN1 activation and IL-6-induced autophagy by regulating PI3KC3 complex formation.	SIGNOR-277567
P40763	P51617	0	phosphorylation	up-regulates	0.55	Irak1 can directly use stat3 as a substrate and cause stat3 serine 727 phosphorylation.	SIGNOR-129685
Q92565	P01111	1	guanine nucleotide exchange factor	up-regulates	0.436	Gefs catalyse the transition from gdp-bound, inactive ras to gtp-bound, active ras.	SIGNOR-183738
O15287	Q13813	1	null	up-regulates quantity by stabilization	0.367	In FA cells, deficiencies in FA proteins lead to decreased stability of alphaRIISp \|These results demonstrate that one of the FA proteins, FANCG, contains a motif that interacts directly with the SH3 domain of alphaIISp. We propose that this binding of FANCG to alphaIISp may be important for the stability of alphaIISp in cells and the role alphaIISp plays in the DNA repair process.\|	SIGNOR-263275
P27361	P17542	1	phosphorylation	down-regulates	0.357	We report here that the important proangiogenic stimulus hypoxia stimulates phosphorylation, ubiquitination, and proteasomal breakdown of tal1 in endothelial cells. A specific serine in the putative transactivation domain of the protein, ser122, is preferentially phosphorylated by mapk in vitro.	SIGNOR-116153
Q9Y294	O14757	0	phosphorylation	up-regulates activity	0.414	Chk1 activated by ataxia telangiectasia mutated (ATM) kinase on DNA breaks in G1 promotes NHEJ through direct phosphorylation of ASF1A at Ser-166. ASF1A phosphorylated at Ser-166 interacts with the repair protein MDC1 and thus enhances MDC1's interaction with ATM and the stable localization of ATM at DNA breaks.	SIGNOR-277620
Q9Y222	P15514	1	transcriptional regulation	up-regulates quantity by expression	0.2	Notably, amphiregulin (Areg), thrombospondin-1 (Tsp-1), JunB, Egr1, adrenomedullin (Adm), Bcl-3 and methyl-CpG binding domain protein 1 (Mbd1) were downregulated in the lungs from Dmp1-null mice while Gas1 and Ect2 genes were upregulated.	SIGNOR-261582
P33981	P54132	1	phosphorylation	up-regulates activity	0.315	Moreover, in mitosis, TTK promotes phosphorylation of Bloom syndrome protein (BLM) and subsequent interaction of BLM with PLK1, ensuring accurate chromosome segregation xref .\|Moreover, in mitosis, TTK promotes phosphorylation of Bloom syndrome protein and subsequent interaction of Bloom syndrome protein with PLK1, ensuring accurate chromosome segregation .	SIGNOR-280156
P51617	P31749	0	phosphorylation	down-regulates activity	0.386	CaMKKc and Akt overexpression increases IRAK1 phosphorylation at Thr100, and point mutation of this site abrogates the inhibitory effect of Akt on IRAK1-mediated NF-kappaB activation.	SIGNOR-252551
Q9P227	P61586	1	gtpase-activating protein	down-regulates activity	0.548	We therefore developed a screening-compatible live-cell imaging assay, using FRET-based biosensors for the prototype GTPases RHOA, RAC1 and CDC4215,19,20 (Extended Data Fig. 2 and Supplementary Note 1)\|We found catalytic activities for 45/75 RhoGEFs and 48/63 RhoGAPs\| Our data thus not only reveal extensive promiscuity among regulators, but also that the inactivating RhoGAPs are less selective than the activating RhoGEFs (p-value=0.02)(Supplementary Table 2).	SIGNOR-260479
P28482	P19634	1	phosphorylation	up-regulates	0.669	We have demonstrated that the map kinases extracellular signal-regulated kinases 1 and 2 (erk1/2) are implicated in growth factor activation of nhe1. / our results suggest that amino acids ser770 and ser771 mediate erk-dependent activation of the na+/h+ exchanger in vivo.	SIGNOR-151925
Q14164	P25963	1	phosphorylation	down-regulates quantity by destabilization	0.484	The activated ikk complex then phosphorylates ikbalfa (an inhibitor of nf-kb) thereby targeting it for ubiquitination and proteasomal degradation.	SIGNOR-167524
O15527	P04637	0	transcriptional regulation	up-regulates quantity by expression	0.429	Using gel-shift assays, we showed that p53 binds to its putative cis-elements within the hOGG1 promoter. In addition we demonstrated that supplementing p53 in HCT116p53-/- cells enhanced the transcription of hOGG1.	SIGNOR-255440
P52566	P17252	0	phosphorylation	down-regulates	0.2	These results reveal a mechanism of downregulation of rhogdi2 activity through pkc-mediated phosphorylation of ser31.	SIGNOR-196765
Q13418	P31749	1	phosphorylation	up-regulates	0.779	Ilk can phosphorylate pkb-akt on serine-473, whereas kinase-deficient ilk severely inhibits endogenous phosphorylation of pkb-akt on serine-473, demonstrating that ilk is involved in agonist stimulated, pi(3)k-dependent, pkb-akt activation.	SIGNOR-252597
Q96FI4	P45983	0	phosphorylation	up-regulates activity	0.2	These data confirm that NEIL1 can be phosphorylated by JNK1 in vitro at S207, S306, and S61.	SIGNOR-278315
Q12809	P29350	0	dephosphorylation	down-regulates	0.2	Our results show that erg-1 is a shp-1 substrate constituting the first report that an ion current is regulated by shp-1.	SIGNOR-94007
Q9HAT8	Q9NWZ3	0	phosphorylation	up-regulates	0.638	Pellino2 is one of the firstsubstrates identified for irak1 andirak4.	SIGNOR-103717
P17612	P49840	1	phosphorylation	down-regulates	0.372	Phosphorylation of ser21 and inactivation of glycogen synthase kinase 3 by protein kinase a.	SIGNOR-83221
Q96QV6	Q14493	0	translation regulation	up-regulates quantity by expression	0.2	Synthesis of mature histone mRNA requires only a single processing reaction: an endonucleolytic cleavage between a conserved stem-loop and a purine-rich downstream element to form the 3' end. The stem-loop binding protein (SLBP) is required for processing, and following processing, histone mRNA is transported to the cytoplasm, where SLBP participates in translation of the histone mRNA\|We used radiolabeled probes generated by PCR targeting the open reading frame (ORF) to detect histones H2A, H2B, H3, H4, and H1 and used 7SK snRNA as a loading control (Fig. 2A). The abundance of histone H2A, H2B, H3, and H4 mRNAs is reduced to 37% to 70% of control levels in the SLBP knockdown cells when compared to the C2 control.	SIGNOR-265401
Q00535	Q96KR7	1	phosphorylation	down-regulates quantity	0.2	We show that scapinin is phosphorylated at a highly conserved site in the central region of the protein (Ser-277) by Cdk5 in vitro. Expression of a scapinin phospho-mimetic mutant (S277D) restored normal axon elongation without affecting actin binding. Instead, phosphorylated scapinin was sequestered in the cytoplasm of neurons and away from the axon.	SIGNOR-273607
P15927	Q9UMS4	0	polyubiquitination	up-regulates activity	0.48	PRP19 is a ubiquitin ligase involved in pre-mRNA splicing and the DNA damage response (DDR). PRP19 ubiquitylates RPA and promotes ATRIP recruitment.	SIGNOR-272075
Q5JVS0	P05771	0	phosphorylation	down-regulates activity	0.29	We found a strong phosphorylation of Ki-1/57 by PKCalphabeta, PKCdelta, PKClambda/zeta, and especially by PKCsigma, however not by PKCmi. These data show that Ki-1/57 can serve in principal as a substrate for a wide variety of different PKC isoforms but also that its phosphorylation is strongest with PKCsigma. \| This suggests that the two threonine residues present in this fragment (Thr354 and Thr375) might be the main target residues for phosphorylation by PKC in vitro. \| Ki-1/57 Exits the Nucleus upon PMA Activation	SIGNOR-249247
O15550	P31269	1	transcriptional regulation	up-regulates quantity by expression	0.323	Evidence for direct involvement of UTX in regulation of HOX gene activity was demonstrated through UTX knockdown experiments in HEK293T cells in which loss of UTX induced transcriptional repression of HOXA and HOXC clusters.	SIGNOR-260025
O75582	P19419	1	phosphorylation	up-regulates	0.2	Phosphorylation on ser383 and ser389 of elk-1 by mapk enhances this basal binding but, most importantly, elk-1 exhibits new interactions with p300.	SIGNOR-85514
P21580	Q13546	1	ubiquitination	down-regulates quantity	0.655	The amino-terminal domain of A20, which is a de-ubiquitinating (DUB) enzyme of the OTU (ovarian tumour) family, removes lysine-63 (K63)-linked ubiquitin chains from receptor interacting protein (RIP), an essential mediator of the proximal TNF receptor 1 (TNFR1) signalling complex. The carboxy-terminal domain of A20, composed of seven C2/C2 zinc fingers, then functions as a ubiquitin ligase by polyubiquitinating RIP with K48-linked ubiquitin chains, thereby targeting RIP for proteasomal degradation.	SIGNOR-259978
P61956	Q6ZNA4	0	polyubiquitination	down-regulates quantity by destabilization	0.626	Arkadia ubiquitinates poly-SUMO2 chains in a SIM- and RING-dependent manner.	SIGNOR-272882
Q5T4S7	Q9NQA5	1	ubiquitination	down-regulates quantity by destabilization	0.246	Cytomix induced interaction between TRPV5 and UBR4 (Ubiquitin recoginition 4), an E3 ubiquitin ligase; knockdown of UBR4 with small interfering RNAs prevented cytomix-induced degradation of TRPV5. UBR4/p600 ubiquitin ligase is responsible for TRPV5 ubiquitination and proteasomal degradation in response to cytomix	SIGNOR-272117
Q8N5S9	Q16566	1	phosphorylation	up-regulates	0.62	Phosphorylation of ca(2+)/cam-bound camkiv on its activation loop threonine (residue thr(200) in human camkiv) by ca(2+)/calmodulin-dependent kinase kinase leads to increased camkiv kinase activity.	SIGNOR-134649
Q96QV6	Q86Y13	0	monoubiquitination	up-regulates activity	0.2	2A-HUB catalyzes monoubiquitination of H2A at lysine 119, functioning as a combinatoric component of the repression machinery required for specific gene regulation programs. Thus, 2A-HUB mediates a selective repression of a specific set of chemokine genes in macrophages, critically modulating migratory responses to TLR activation. H2A monoubiquitination acts to prevent FACT recruitment at the transcriptional promoter region, blocking RNA polymerase II release at the early stage of elongation.	SIGNOR-271761
P35916	P12931	0	phosphorylation	up-regulates	0.513	Vegfr-3 is a direct c-src target and mass spectrometry analysis identified the sites phosphorylated by c-src as tyrosine 830, 833, 853, 1063, 1333, and 1337 vegfr-3 phosphorylation activates the recruitment to the receptor of the adaptor proteins crki/ii and shc inducing activation of jnk.	SIGNOR-165035
P20248	P24941	0	phosphorylation	up-regulates	0.977	Here we present evidence from in vitro and in vivo assay systems that the degradation of human cyclin a can be inhibited by kinase-inactive mutants of cdk2 and cdc2cdk2 can phosphorylate cyclin a on ser-154	SIGNOR-74466
P05771	Q13224	1	phosphorylation	up-regulates activity	0.364	These results indicate that PKC can directly phosphorylate S1303 and S1323 in the NR2B C terminus, leading to enhanced currents through NMDA receptor channels.	SIGNOR-249087
Q9UGL1	P09874	0	relocalization	up-regulates activity	0.354	The mechanism of KDM5B recruitment is quite specific and requires the presence of nucleosomes containing histone variant MacroH2A1.1 and PARylation by PARP1.	SIGNOR-271574
Q00987	O15297	0	dephosphorylation	up-regulates	0.681	Wip1 interacts with and dephosphorylates mdm2 at serine 395, a site phosphorylated by the atm kinase. Dephosphorylated mdm2 has increased stability and affinity for p53, facilitating p53 ubiquitination and degradation.	SIGNOR-158328
P05787	P53778	0	phosphorylation	up-regulates	0.2	Keratin 8 (k8) serine 73 occurs within a relatively conserved type ii keratin motif . Here we show that ser-73 is exclusively phosphorylated in vitro by p38 mitogen-activated protein kinase. The ser-73 --> ala-associated filament reorganization defect is rescued by a ser-73 --> asp mutation. Also, disease-causing keratin mutations can modulate keratin phosphorylation and organization, which may affect disease pathogenesis.	SIGNOR-114067
P53350	O96017	1	phosphorylation	up-regulates	0.492	Plk1 overexpression enhances phosphorylation of chk2 at thr-68.	SIGNOR-96637
P16885	Q92835	0	dephosphorylation	down-regulates activity	0.312	An adaptor protein Dok-3 mediates the suppressive function of LYN. The Dok-3 phosphorylated by LYN upon BCR stimulation forms a complex with GRB2, which allows it to enter into the signalosome and associate with activation of SHIP protein. This translocation facilitates the efficient inhibition of PLCc2 and SYK from activation, subsequently resulting in the suppression of downstream Ca2+ signaling.	SIGNOR-268455
P28562	P04150	0	null	up-regulates quantity	0.58	Glucocorticoids inhibit MAP kinase via increased expression and decreased degradation of MKP-1\|Both induction of MKP-1 expression and inhibition of its degradation are necessary for glucocorticoid-mediated inhibition of Erk-1/2 activation. In NIH-3T3 fibroblasts, although glucocorticoids up-regulate the MKP-1 level, they do not attenuate the proteasomal degradation of this protein and consequently they are unable to inhibit Erk-1/2 activity.	SIGNOR-253546
O94916	P80188	1	transcriptional regulation	up-regulates quantity by expression	0.329	As expected, the depletion of NFAT5 decreased the S100A4 and LCN2 mRNA levels (Figure 3a). In addition, chromatin immunoprecipitation (ChIP) assay using NFAT5 antibody indicated that NFAT5 was bound to the S100A4 and LCN2 promoters (Figure 3b, Supplementary Figure S3), as expected (Chen et al., 2009).	SIGNOR-274114
P35580	Q02078	0	transcriptional regulation	up-regulates quantity by expression	0.317	Myocyte enhancer factor-2 and serum response factor binding elements regulate fast Myosin heavy chain transcription in vivo. We show that the upstream promoter region of the gene most abundantly expressed in mouse skeletal muscles, IIb MyHC, retains binding activity and transcriptional activation for three positive transcription factors, the serum response factor, Oct-1, and myocyte enhancer factor-2, whereas the other two genes (IIa and IId/x) have nucleotide substitutions in these sites that reduce binding and transcriptional activation	SIGNOR-238763
Q8N264	Q13464	0	phosphorylation	up-regulates activity	0.433	ROCK phosphorylates FilGAP, and this phosphorylation stimulates its RacGAP activity and is a requirement for FilGAP-mediated bleb formation. \| As shown in Fig. 5b, ROCK stimulated the incorporation of phosphate into FilGAP. We identified seven potential phosphorylation sites in FilGAP that was isolated by preparative SDSPAGE and subjected to trypsin digestion and mass spectrometry: Ser 391, Ser 402, Ser 413, Ser 415, Ser 437, Thr 452, and a cluster of serine and threonine residues (SSTTT) at position 573577 (see Supplementary Information, Table S2).	SIGNOR-249302
Q13315	P38398	1	phosphorylation	up-regulates	0.819	Results from this study indicate that the checkpoint protein kinase atm (mutated in ataxia telangiectasia) was required for phosphorylation of brca1 in response to ionizing radiation. Brca1 is phosphorylated at tyrosine residues in an atm-dependent, radiation-dependent manner.	SIGNOR-72075
Q9C009	Q15746	1	transcriptional regulation	down-regulates quantity by repression	0.2	Results from this analysis revealed that the inhibitory activity of HFH-1 was contained within the forkhead DNA-binding domain. Truncated HFH-1 proteins that lack the entire forkhead domain were unable to repress telokin promoter activity, in contrast expression of the forkhead domain alone was able to repress promoter activity	SIGNOR-261609
P09758	P17252	0	phosphorylation	down-regulates activity	0.2	Analyses using HCT116 cells expressing WT Trop-2 (HCT116/WT) or Trop-2 alanine-substituted at Ser-303 (HCT116/S303A) or Ser-322 (HCT116/S322A) revealed that Trop-2 is phosphorylated at Ser-322. sing protein kinase C (PKC) inhibitors and PKC-specific siRNAs, we found that PKCα and PKCδ are responsible for Trop-2 phosphorylation.	SIGNOR-273821
P02452	P13497	0	cleavage	up-regulates activity	0.681	BMP-1myc Expressed in COS-7 Cells Exhibits Procollagen C-proteinase Activity. Bone morphogenetic protein (BMP)-1, which belongs to the tolloid subgroup of astacin-like zinc metalloproteinases, cleaves the C-propeptides of procollagen at the physiologic site and is, therefore, a procollagen C-proteinase (PCP). Cleavage occurs between a specific alanine or glycine residue (depending on the procollagen chain) and an invariant aspartic acid residue in each of the three chains of procollagen.	SIGNOR-256342

Q8N726

Q13535

1

phosphorylation

up-regulates activity

0.391

Regulation of NF-kappaB and p53 through activation of ATR and Chk1 by the ARF tumour suppressorInduction of ATR activity in Hs68 E2F1ER cells by endogenous ARF.

SIGNOR-134781

Q13489

Q13546

1

polyubiquitination

up-regulates activity

0.747

CIAP1/2 are direct E3 ligases conjugating diverse types of ubiquitin chains to receptor interacting proteins kinases 1 to 4 (RIP1-4).Together, our results demonstrate that depleting cIAP1/2 inhibits RIP1-4 mediated NF-kB activation without affecting RIP auto-phosphorylation.

SIGNOR-272713

P00533

Q86U44

0

transcriptional regulation

up-regulates quantity by expression

0.331

Here we find that METTL3 promotes translation of certain mRNAs including epidermal growth factor receptor (EGFR) and the Hippo pathway effector TAZ in human cancer cells.

SIGNOR-265954

O14965

P53350

1

phosphorylation

up-regulates

0.665

We find that aurora a (aurka) can directly phosphorylate plk1 on thr 210;activation of plk1 requires phosphorylation of a conserved threonine residue (thr 210).

SIGNOR-179422

P20823

Q9HAW8

1

transcriptional regulation

up-regulates quantity by expression

0.251

Using gel shift and functional assays, HNF1alpha was demonstrated to bind to and activate the UGT1A8, -1A9, and -1A10 promoters. In contrast, Cdx2 bound to and activated the UGT1A8 and -1A10 promoters but could not activate the UGT1A9 promoter.

SIGNOR-253971

P47712

Q05513

0

phosphorylation

up-regulates activity

0.327

To further evaluate cPLA2 as a candidate substrate for PKCζ, we developed a custom antibody recognizing the cPLA2 T376 phosphorylation site. Specificity was validated in both serum starved/stimulated samples

SIGNOR-277518

P20042

P49770

0

guanine nucleotide exchange factor

up-regulates activity

0.751

EIF2B converts the protein synthesis initiation factor 2 (eIF2) from an inactive GDP-bound form to an active eIF2-GTP complex owing to its guanine nucleotide exchange factor (GEF) activity.

SIGNOR-269130

Q5JRX3

P05067

1

cleavage

down-regulates activity

0.373

In the present study we have identified and characterized the human PreP homologue, hPreP, in brain mitochondria, and we show its capacity to degrade the amyloid beta-protein (Abeta). PreP belongs to the pitrilysin oligopeptidase family M16C containing an inverted zinc-binding motif. We show that hPreP is localized to the mitochondrial matrix. In situ immuno-inactivation studies in human brain mitochondria using anti-hPreP antibodies showed complete inhibition of proteolytic activity against Abeta.

SIGNOR-260661

P01308

Q8WZA2

0

relocalization

up-regulates quantity

0.377

Activation of EPAC2 has recently been shown to increase the density of insulin‐containing granules near the plasma membrane, facilitating insulin secretion from the β cells

SIGNOR-278140

Q96HE7

Q8IXL6

0

phosphorylation

up-regulates activity

0.2

We further show that ER oxidoreductin 1α (Ero1α), the pivotal sulfhydryl oxidase that catalyzes disulfide formation in the ER, is phosphorylated by Fam20C in the Golgi apparatus and retrograde-transported to the ER mediated by ERp44. The phosphorylation of Ser145 greatly enhances Ero1α oxidase activity and is critical for maintaining ER redox homeostasis and promoting oxidative protein folding.

SIGNOR-277395

P40763

P28482

0

phosphorylation

down-regulates activity

0.75

ERK2 phosphorylates Stat3 on three serine-containing peptides and decreases its tyrosine phosphorylation induced by EGF treatment.|Here, we report that ERK2 activated by its upstream kinase, MEK1, represses Stat3 transcriptional activity induced by Src or Jak-2.

SIGNOR-279635

Q14683

Q13315

0

phosphorylation

up-regulates activity

0.705

Atm phosphorylates Smc1 on serines 957 and 966 in vitro and in vivo, and expression of an Smc1 protein mutated at these phosphorylation sites abrogates the ionizing irradiation-induced S phase cell cycle checkpoint

SIGNOR-255589

Q6NXT2

Q92830

0

acetylation

down-regulates activity

0.2

The HAT module within the SAGA and ADA complexes acetylates histone H3, mainly on residues K9 and K14.

SIGNOR-269608

O95453

P49137

0

phosphorylation

down-regulates

0.375

Mk2 phosphorylates parn, blocking gadd45_ mrna degradation. Parn can serve as a direct substrate for mk2, and demonstrating that ser-557 is the dominant mk2 phosphorylation site.

SIGNOR-168377

O15297

Q07812

1

dephosphorylation

down-regulates activity

0.2

34 In this study, a novel function of Wip1 was identified, that is, its ability to dephosphorylate directly and thus inactivate apoptotic BAX protein in response to gamma irradiation.|To ascertain whether Wip1 dephosphorylates BAX, recombinant Wip1 was incubated with previously reported BAX-derived phosphopeptides containing Ser87, Ser163, Thr167, and Ser184 in an in vitro phosphatase assay. xref , xref Peptides containing phospho-Thr180 from p38 MAPK and phospho-Thr31 from UNG2 were used as a positive and negative control, respectively. xref As shown in xref , purified Wip1 did not dephosphorylate the four BAX-derived phosphopeptides.

SIGNOR-276993

P31995

P07948

0

phosphorylation

up-regulates activity

0.2

Fyn and Blk definitely phosphorylate Y-282 in the ITAM of FcgRIIa/c, whereas the non-ITAM tyrosine residue (Y-275) becomes phosphorylated by Syk, as the phosphorylation of double point mutants shows. In addition to these tyrosine residues, Fyn, Blk, and Syk might phosphorylate the most C-terminal tyrosine residue (Y-298) because altering this tyrosine residue together with one of the tyrosine residues clearly shown to be phosphorylated by the respective PTK results in the abrogation of phosphorylation

SIGNOR-262676

O14492

P04629

0

phosphorylation

up-regulates

0.547

Two substrates of trk kinases, raps and sh2-b. raps and sh2-b mediate trk signaling in developing neurons

SIGNOR-62619

Q96J87

P38936

1

post transcriptional regulation

up-regulates quantity by stabilization

0.2

CELF6 binds to the 3'UTR of p21 transcript and increases its mRNA stability. Depletion of CELF6 promotes cell cycle progression, cell proliferation and colony formation whereas overexpression of CELF6 induces G1 phase arrest.

SIGNOR-269044

Q9UIG0

Q16539

0

phosphorylation

up-regulates

0.2

Moreover, this region (wac domain) was also phosphorylated by recombinant proteins of p38_? And jnk2_? But not by akt1

SIGNOR-188160

P11413

P53350

0

phosphorylation

up-regulates activity

0.346

We find that Plk1 interacts with and directly phosphorylates glucose-6-phosphate dehydrogenase (G6PD). By activating G6PD through promoting the formation of its active dimer, Plk1 increases PPP flux and directs glucose to the synthesis of macromolecules.|the kinase domain of Plk1 phosphorylates T406, T466 of G6PD

SIGNOR-267581

Q16539

Q16584

1

phosphorylation

down-regulates

0.304

Jnk and p38 mapk activation have antagonistic effects in many cases. From a mechanicistic point of view, the p38 mapk pathway can negatively regulate jnk activity at the level of map3ks, either by phosphorylating mlk3 or the tak1 regulatory subunit tab2

SIGNOR-166605

Q9GZU7

P78527

1

dephosphorylation

up-regulates activity

0.2

CTDSP1 activates DNA-PKcs and enhances DNA-PKcs dependent topoI degradation in response to irinotecan .|Our novel finding indicates that CTDSP1 dephosphorylates DNA-PKcs, changes its kinase activity, and regulates irinotecan-induced topoI degradation.

SIGNOR-277101

O95644

Q08209

0

dephosphorylation

up-regulates

0.825

Calcineurin directly dephosphorylates nfat resulting in the nuclear import of nfat.

SIGNOR-176370

P30307

Q16539

0

phosphorylation

down-regulates activity

0.439

P38 binds and phosphorylates Cdc25B at serines 309 and 361, and Cdc25C at serine 216; phosphorylation of these residues is required for binding to 14-3-3 proteins.

SIGNOR-250091

P04083

Q96QT4

0

phosphorylation

up-regulates

0.544

Trpm7 was responsible for phosphorylation of the serine 5 (ser5) residue [29]. In 2009, the study focused on an association between anxa1 and trpm7 confirmed the presence of a trpm7/annexin a1/mg2_+ complex, suggesting a novel pathway in bradykinin signaling, dependent on pkc and c-src [30]. Even though that pathway is not fully characterized, the same team that discovered the ser5 phosphorylation of anxa1 also reported crucial relevance of this modification for anxa1 membrane binding and especially for the interaction between annexin a1 and its known partner, the calcium binding protein s100a11

SIGNOR-202804

P07949

Q8N4X5

1

phosphorylation

up-regulates activity

0.33

RET/PTC induced robust tyrosine phosphorylation of XB130, which promoted its subsequent association with the p85alpha subunit of phosphatidylinositol 3-kinase (PI 3-kinase). We identified tyrosine 54 of XB130 as the major target of RET/PTC-mediated phosphorylation and a critical binding site for the SH2 domains of p85alpha.

SIGNOR-263192

O43683

Q5FBB7

1

phosphorylation

up-regulates quantity by stabilization

0.2

Bub1 phosphorylates Sgo1 in the vicinity of its APC/C degrons in vitro.|On the other hand, Bub1 targets PP2A to centromeres, which in turn maintains Sgo1 at centromeres by counteracting Plk1 mediated chromosome removal of Sgo1.

SIGNOR-278915

O60346

P31749

1

dephosphorylation

down-regulates

0.76

Here, we identify a protein_ phosphatase, ph domain leucine-rich repeat protein_ phosphatase_ (phlpp), that specifically_ dephosphorylates_ the hydrophobic motif of_ akt_ (ser473 in akt1), triggering_ apoptosis_ and suppressing_ tumor_ growth.

SIGNOR-252601

Q96E52

O60313

1

cleavage

up-regulates activity

0.604

YME1L cleaves OPA1 at S2 and S3 site to transform into L-OPA1 to induce fusion when cells are faced with increased oxidative phosphorylation, whereas OMA1 cleaves OPA1 at an S1 site to transform into S-OPA1, resulting in the fragmented response to cellular stress, mitochondrial dysfunction, or deletion of YME1L

SIGNOR-274139

Q04760

P09769

0

phosphorylation

up-regulates activity

0.2

We show that Glo1 activity is promoted by phosphorylation on Tyrosine 136 via multiple kinases. Glo1 Y136 is phosphorylated by multiple different kinases including all members of the Src family. Depletion of multiple different kinases led to a partial reduction in Glo1(Y136) phosphorylation. These included members of the Src family (Src, Yes1, FGR, and the related Abl1), and of the FAK, EPHA, FGFR, and VEGFR families (Figure 2B), suggesting phosphorylation of Glo1 on Y136 by multiple different kinases. In vitro kinase assays revealed that all the members of the Src family, as well as Epha5 and VEGFR3, can efficiently phosphorylate recombinant Glo1 on Y136 (Figure 2C–D).

SIGNOR-276188

P06493

P46937

1

phosphorylation

up-regulates activity

0.425

Our evidence suggested that these YAP sites (Ser138, Thr143, and Ser367) were CDK1 phosphorylation sites.|These data demonstrate that the YAP phosphorylation sites Ser138, Thr143, and Ser367 are important for proper mitosis and cytokinesis.

SIGNOR-276587

Q15418

Q96RK0

1

phosphorylation

down-regulates

0.2

Specifically, 14-3-3 binds to p90(rsk)-phosphorylated ser?_??_ Of capic?_A thereby modulating dna binding to its hmg (high-mobility group) box, whereas erk phosphorylations prevent binding of a c-terminal nls (nuclear localization sequence) to importin ?4 (kpna3)

SIGNOR-169883

O00716

O14757

0

phosphorylation

up-regulates

0.328

These results suggest that e2f3a is directly phosphorylated by chk kinases and that the phosphorylation of serine 124 is required for the posttranslational induction of e2f3a protein by chemotherapy.

SIGNOR-161758

Q15052

P63000

1

guanine nucleotide exchange factor

up-regulates activity

0.623

ARHGEF6 is a Rho guanine nucleotide exchange factor for Rac1 and constitutively bound to GIT1. NO and PGI2 activate PKG and PKA, respectively and both kinases phosphorylate ARHGEF6 on Ser-684 and possibly on Ser-640. Phosphorylation of ARHGEF6 results in the assembly of a GIT1-ARHGEF6–14-3-3 complex. These changes might contribute to PGI2- and NO-mediated Rac1 inhibition.

SIGNOR-272167

P61088

P16104

1

ubiquitination

up-regulates

0.2

In an h2ax- and mdc1-dependent manner , rnf8/ubc13 complexes go to sites of dna damage through their fha domain and initiate the synthesis of k63 polyubiquitin chains on chromatin that recruit the brca1 a complex through the uim domains of rap80.

SIGNOR-159880

P06239

P04234

1

phosphorylation

up-regulates activity

0.571

Last, we demonstrate directly that members of the CD3 complex, including the gamma, delta, and epsilon chains, as well as a putative zeta subunit, can be phosphorylated at tyrosine residues by the CD4/CD8.p56lck complex.

SIGNOR-259929

P55085

P17655

0

cleavage

down-regulates activity

0.298

PAR1E and PAR2E (10 microM) were incubated in the presence of the different proteases | The enzymes were used at the following concentrations: 0.5 unit/mL thrombin, 2.5 nM trypsin, 20 nM plasmin, 20 nM cathepsin G, 20 nM elastase, 20 nM proteinase 3, and 2 units/mL calpain I and II|Protease-activated receptors (PARs) mediate cell activation after proteolytic cleavage of their extracellular amino terminus.|Mass spectrometry studies of PAR2E predicted activation of PAR2 by trypsin through cleavage at the Arg36-Ser37 site, no effect of thrombin, and inactivation of the receptor by plasmin, calpain and leukocyte elastase, cathepsin G, and proteinase 3

SIGNOR-263581

O60260

Q9BXM7

0

phosphorylation

up-regulates

0.2

We show that human pink1 is specifically activated by mitochondrial membrane potential (??m) depolarization, enabling it to phosphorylate parkin at ser(65). We further show that phosphorylation of parkin at ser(65) leads to marked activation of its e3 ligase activity that is prevented by mutation of ser(65) or inactivation of pink1.

SIGNOR-197976

Q9UQM7

P14921

1

phosphorylation

down-regulates

0.309

Treatment of ets1 by t-cell nuclear extract or phosphorylation of these four serines by calmodulin-dependent kinase ii (camk ii) has recently been reported to decrease ets1 dna binding by reinforcing autoinhibition

SIGNOR-96334

O75197

O15169

1

relocalization

down-regulates quantity

0.83

Axin is a protein that interacts with the intracellular domain of LRP-5. LRP-5 active form bind Axin and induce LEF-1 activation by destabilizing Axin and stabilizing beta-catenin.

SIGNOR-236997

P23467

Q9UM73

1

dephosphorylation

down-regulates

0.334

Rptpbeta/zeta dephosphorylates alk at the site(s) in alk that is undergoing autophosphorylation through autoactivation.

SIGNOR-157175

P23246

P07101

1

transcriptional regulation

down-regulates quantity by repression

0.2

It has been reported that DJ-1 is a neuroprotective transcriptional co-activator that sequesters a transcriptional co-repressor polypyrimidine tract-binding protein-associated splicing factor (PSF) from the TH gene promoter.

SIGNOR-271697

P27361

P09917

1

phosphorylation

up-regulates activity

0.328

Intriguingly, a significant difference in the potency of nonredox-type inhibitors (but not of BWA4C) was determined between wild-type 5-LO and the mutant S271A/S663A-5-LO (lacking phosphorylation sites for ERK1/2 and MAPKAPK-2) in HeLa cells. Collectively, our data suggest that compared with Ca2+-mediated 5-LO product formation, enzyme activation involving 5-LO phosphorylation events specifically and strongly alters the susceptibility of 5-LO toward nonredox-type inhibitors in intact cells.

SIGNOR-264440

Q15418

O00418

1

phosphorylation

down-regulates activity

0.513

We show that two such kinases, p70 s6 kinase (regulated via mtor) and p90(rsk1) (activated by erk), phosphorylate eef2k at a conserved serine and inhibit its activity

SIGNOR-109708

P22681

P06241

0

phosphorylation

up-regulates activity

0.812

Fyn associates with cbl and phosphorylates tyrosine 731 in cbl, a binding site for phosphatidylinositol 3-kinasecbl represents a substrate for src-like kinases that are activated in response to the engagement of cell surface receptors, and that src-like kinases are responsible for the phosphorylation of a tyrosine residue in cbl that may regulate activation of phosphatidylinositol 3-kinase

SIGNOR-63968

Q16539

Q92945

1

phosphorylation

down-regulates activity

0.572

KSRP, an important factor for AU-rich element (ARE)-directed mRNA decay, undergoes p38-dependent phosphorylation during muscle differentiation. KSRP phosphorylated by p38 displays compromised binding to ARE-containing transcripts and fails to promote their rapid decay, although it retains the ability to interact with the mRNA degradation machinery

SIGNOR-235856

P51451

P31995

1

phosphorylation

up-regulates activity

0.2

Fyn and Blk definitely phosphorylate Y-282 in the ITAM of FcgRIIa/c, whereas the non-ITAM tyrosine residue (Y-275) becomes phosphorylated by Syk, as the phosphorylation of double point mutants shows. In addition to these tyrosine residues, Fyn, Blk, and Syk might phosphorylate the most C-terminal tyrosine residue (Y-298) because altering this tyrosine residue together with one of the tyrosine residues clearly shown to be phosphorylated by the respective PTK results in the abrogation of phosphorylation

SIGNOR-262673

Q13362-3

Q13315

0

phosphorylation

up-regulates activity

0.378

In the present study, we demonstrate that ataxia-telangiectasia mutated (ATM) directly phosphorylates and specifically regulates B56γ3, B56γ2 and B56δ, after DNA damage. We further show that phosphorylation of B56γ3 at Ser510 leads to an increase in B56γ3-PP2A complexes, and direction of PP2A phosphatase activity toward the substrate p53, activating its tumor-suppressive functions. we show that Ser510 phosphorylation significantly enhances the ability of B56γ3 to inhibit cell proliferation and anchorage-independent growth.

SIGNOR-276320

P22607

O43318

1

phosphorylation

up-regulates activity

0.293

Indeed, we found that TAK1 was tyrosine phosphorylated in HEK293 cells transiently expressing constitutively active FGFR3 (K650E), but not the kinase-dead receptor (K508M), indicating that activated FGFR3 can either directly or indirectly tyrosine phosphorylate TAK1 (XREF_FIG).

SIGNOR-279176

P12931

P55211

1

phosphorylation

up-regulates activity

0.373

As a result, we established that Src was able to directly phosphorylate caspase-9 at tyrosine 251, leading to elevated caspase-9 activity.

SIGNOR-272998

P49137

P27815

1

phosphorylation

down-regulates activity

0.347

Phosphorylation of cAMP-specific PDE4A5 (phosphodiesterase-4A5) by MK2 (MAPKAPK2) attenuates its activation through protein kinase A phosphorylation. In the present study, we show that PDE4A5 is phosphorylated at Ser147, within the regulatory UCR1 (ultraconserved region 1) domain conserved among PDE4 long isoforms, by MK2 (MAPK-activated protein kinase 2, also called MAPKAPK2). Phosphorylation by MK2, although not altering PDE4A5 activity, markedly attenuates PDE4A5 activation through phosphorylation by protein kinase A. This modification confers the amplification of intracellular cAMP accumulation in response to adenylate cyclase activation by attenuating a major desensitization system to cAMP.

SIGNOR-263078

Q5JVS0

Q05513

0

phosphorylation

down-regulates activity

0.292

We found a strong phosphorylation of Ki-1/57 by PKCalphabeta, PKCdelta, PKClambda/zeta, and especially by PKCsigma, however not by PKCmi. These data show that Ki-1/57 can serve in principal as a substrate for a wide variety of different PKC isoforms but also that its phosphorylation is strongest with PKCsigma. | This suggests that the two threonine residues present in this fragment (Thr354 and Thr375) might be the main target residues for phosphorylation by PKC in vitro. | Ki-1/57 Exits the Nucleus upon PMA Activation

SIGNOR-249257

O75581

Q9Y6M4

0

phosphorylation

up-regulates activity

0.288

Central to WNT signalosome formation is phosphorylation of LRP6 at multiple sites, with GSK3β phosphorylating LRP6 at S1490 and CK1 family members phosphorylating LRP6 at T1479 and T1493

SIGNOR-275401

Q96EB6

P45983

0

phosphorylation

up-regulates

0.601

Human sirt1 was phosphorylated by jnk1 on three sites: ser27, ser47, and thr530 and this phosphorylation of sirt1 increased its nuclear localization and enzymatic activity. Surprisingly, jnk1 phosphorylation of sirt1 showed substrate specificity resulting in deacetylation of histone h3, but not p53.

SIGNOR-162314

O60674

Q14457

1

phosphorylation

up-regulates activity

0.297

Mechanistically, IL-6 triggers the interaction between JAK2 and BECN1, where JAK2 phosphorylates BECN1 at Y333. We demonstrate that BECN1 Y333 phosphorylation is crucial for BECN1 activation and IL-6-induced autophagy by regulating PI3KC3 complex formation.

SIGNOR-277567

P40763

P51617

0

phosphorylation

up-regulates

0.55

Irak1 can directly use stat3 as a substrate and cause stat3 serine 727 phosphorylation.

SIGNOR-129685

Q92565

P01111

1

guanine nucleotide exchange factor

up-regulates

0.436

Gefs catalyse the transition from gdp-bound, inactive ras to gtp-bound, active ras.

SIGNOR-183738

O15287

Q13813

1

null

up-regulates quantity by stabilization

0.367

In FA cells, deficiencies in FA proteins lead to decreased stability of alphaRIISp |These results demonstrate that one of the FA proteins, FANCG, contains a motif that interacts directly with the SH3 domain of alphaIISp. We propose that this binding of FANCG to alphaIISp may be important for the stability of alphaIISp in cells and the role alphaIISp plays in the DNA repair process.|

SIGNOR-263275

P27361

P17542

1

phosphorylation

down-regulates

0.357

We report here that the important proangiogenic stimulus hypoxia stimulates phosphorylation, ubiquitination, and proteasomal breakdown of tal1 in endothelial cells. A specific serine in the putative transactivation domain of the protein, ser122, is preferentially phosphorylated by mapk in vitro.

SIGNOR-116153

Q9Y294

O14757

0

phosphorylation

up-regulates activity

0.414

Chk1 activated by ataxia telangiectasia mutated (ATM) kinase on DNA breaks in G1 promotes NHEJ through direct phosphorylation of ASF1A at Ser-166. ASF1A phosphorylated at Ser-166 interacts with the repair protein MDC1 and thus enhances MDC1's interaction with ATM and the stable localization of ATM at DNA breaks.

SIGNOR-277620

Q9Y222

P15514

1

transcriptional regulation

up-regulates quantity by expression

0.2

Notably, amphiregulin (Areg), thrombospondin-1 (Tsp-1), JunB, Egr1, adrenomedullin (Adm), Bcl-3 and methyl-CpG binding domain protein 1 (Mbd1) were downregulated in the lungs from Dmp1-null mice while Gas1 and Ect2 genes were upregulated.

SIGNOR-261582

P33981

P54132

1

phosphorylation

up-regulates activity

0.315

Moreover, in mitosis, TTK promotes phosphorylation of Bloom syndrome protein (BLM) and subsequent interaction of BLM with PLK1, ensuring accurate chromosome segregation xref .|Moreover, in mitosis, TTK promotes phosphorylation of Bloom syndrome protein and subsequent interaction of Bloom syndrome protein with PLK1, ensuring accurate chromosome segregation .

SIGNOR-280156

P51617

P31749

0

phosphorylation

down-regulates activity

0.386

CaMKKc and Akt overexpression increases IRAK1 phosphorylation at Thr100, and point mutation of this site abrogates the inhibitory effect of Akt on IRAK1-mediated NF-kappaB activation.

SIGNOR-252551

Q9P227

P61586

1

gtpase-activating protein

down-regulates activity

0.548

We therefore developed a screening-compatible live-cell imaging assay, using FRET-based biosensors for the prototype GTPases RHOA, RAC1 and CDC4215,19,20 (Extended Data Fig. 2 and Supplementary Note 1)|We found catalytic activities for 45/75 RhoGEFs and 48/63 RhoGAPs| Our data thus not only reveal extensive promiscuity among regulators, but also that the inactivating RhoGAPs are less selective than the activating RhoGEFs (p-value=0.02)(Supplementary Table 2).

SIGNOR-260479

P28482

P19634

1

phosphorylation

up-regulates

0.669

We have demonstrated that the map kinases extracellular signal-regulated kinases 1 and 2 (erk1/2) are implicated in growth factor activation of nhe1. / our results suggest that amino acids ser770 and ser771 mediate erk-dependent activation of the na+/h+ exchanger in vivo.

SIGNOR-151925

Q14164

P25963

1

phosphorylation

down-regulates quantity by destabilization

0.484

The activated ikk complex then phosphorylates ikbalfa (an inhibitor of nf-kb) thereby targeting it for ubiquitination and proteasomal degradation.

SIGNOR-167524

O15527

P04637

0

transcriptional regulation

up-regulates quantity by expression

0.429

Using gel-shift assays, we showed that p53 binds to its putative cis-elements within the hOGG1 promoter. In addition we demonstrated that supplementing p53 in HCT116p53-/- cells enhanced the transcription of hOGG1.

SIGNOR-255440

P52566

P17252

0

phosphorylation

down-regulates

0.2

These results reveal a mechanism of downregulation of rhogdi2 activity through pkc-mediated phosphorylation of ser31.

SIGNOR-196765

Q13418

P31749

1

phosphorylation

up-regulates

0.779

Ilk can phosphorylate pkb-akt on serine-473, whereas kinase-deficient ilk severely inhibits endogenous phosphorylation of pkb-akt on serine-473, demonstrating that ilk is involved in agonist stimulated, pi(3)k-dependent, pkb-akt activation.

SIGNOR-252597

Q96FI4

P45983

0

phosphorylation

up-regulates activity

0.2

These data confirm that NEIL1 can be phosphorylated by JNK1 in vitro at S207, S306, and S61.

SIGNOR-278315

Q12809

P29350

0

dephosphorylation

down-regulates

0.2

Our results show that erg-1 is a shp-1 substrate constituting the first report that an ion current is regulated by shp-1.

SIGNOR-94007

Q9HAT8

Q9NWZ3

0

phosphorylation

up-regulates

0.638

Pellino2 is one of the firstsubstrates identified for irak1 andirak4.

SIGNOR-103717

P17612

P49840

1

phosphorylation

down-regulates

0.372

Phosphorylation of ser21 and inactivation of glycogen synthase kinase 3 by protein kinase a.

SIGNOR-83221

Q96QV6

Q14493

0

translation regulation

up-regulates quantity by expression

0.2

Synthesis of mature histone mRNA requires only a single processing reaction: an endonucleolytic cleavage between a conserved stem-loop and a purine-rich downstream element to form the 3' end. The stem-loop binding protein (SLBP) is required for processing, and following processing, histone mRNA is transported to the cytoplasm, where SLBP participates in translation of the histone mRNA|We used radiolabeled probes generated by PCR targeting the open reading frame (ORF) to detect histones H2A, H2B, H3, H4, and H1 and used 7SK snRNA as a loading control (Fig. 2A). The abundance of histone H2A, H2B, H3, and H4 mRNAs is reduced to 37% to 70% of control levels in the SLBP knockdown cells when compared to the C2 control.

SIGNOR-265401

Q00535

Q96KR7

1

phosphorylation

down-regulates quantity

0.2

We show that scapinin is phosphorylated at a highly conserved site in the central region of the protein (Ser-277) by Cdk5 in vitro. Expression of a scapinin phospho-mimetic mutant (S277D) restored normal axon elongation without affecting actin binding. Instead, phosphorylated scapinin was sequestered in the cytoplasm of neurons and away from the axon.

SIGNOR-273607

P15927

Q9UMS4

0

polyubiquitination

up-regulates activity

0.48

PRP19 is a ubiquitin ligase involved in pre-mRNA splicing and the DNA damage response (DDR). PRP19 ubiquitylates RPA and promotes ATRIP recruitment.

SIGNOR-272075

Q5JVS0

P05771

0

phosphorylation

down-regulates activity

0.29

We found a strong phosphorylation of Ki-1/57 by PKCalphabeta, PKCdelta, PKClambda/zeta, and especially by PKCsigma, however not by PKCmi. These data show that Ki-1/57 can serve in principal as a substrate for a wide variety of different PKC isoforms but also that its phosphorylation is strongest with PKCsigma. | This suggests that the two threonine residues present in this fragment (Thr354 and Thr375) might be the main target residues for phosphorylation by PKC in vitro. | Ki-1/57 Exits the Nucleus upon PMA Activation

SIGNOR-249247

O15550

P31269

1

transcriptional regulation

up-regulates quantity by expression

0.323

Evidence for direct involvement of UTX in regulation of HOX gene activity was demonstrated through UTX knockdown experiments in HEK293T cells in which loss of UTX induced transcriptional repression of HOXA and HOXC clusters.

SIGNOR-260025

O75582

P19419

1

phosphorylation

up-regulates

0.2

Phosphorylation on ser383 and ser389 of elk-1 by mapk enhances this basal binding but, most importantly, elk-1 exhibits new interactions with p300.

SIGNOR-85514

P21580

Q13546

1

ubiquitination

down-regulates quantity

0.655

The amino-terminal domain of A20, which is a de-ubiquitinating (DUB) enzyme of the OTU (ovarian tumour) family, removes lysine-63 (K63)-linked ubiquitin chains from receptor interacting protein (RIP), an essential mediator of the proximal TNF receptor 1 (TNFR1) signalling complex. The carboxy-terminal domain of A20, composed of seven C2/C2 zinc fingers, then functions as a ubiquitin ligase by polyubiquitinating RIP with K48-linked ubiquitin chains, thereby targeting RIP for proteasomal degradation.

SIGNOR-259978

P61956

Q6ZNA4

0

polyubiquitination

down-regulates quantity by destabilization

0.626

Arkadia ubiquitinates poly-SUMO2 chains in a SIM- and RING-dependent manner.

SIGNOR-272882

Q5T4S7

Q9NQA5

1

ubiquitination

down-regulates quantity by destabilization

0.246

Cytomix induced interaction between TRPV5 and UBR4 (Ubiquitin recoginition 4), an E3 ubiquitin ligase; knockdown of UBR4 with small interfering RNAs prevented cytomix-induced degradation of TRPV5. UBR4/p600 ubiquitin ligase is responsible for TRPV5 ubiquitination and proteasomal degradation in response to cytomix

SIGNOR-272117

Q8N5S9

Q16566

1

phosphorylation

up-regulates

0.62

Phosphorylation of ca(2+)/cam-bound camkiv on its activation loop threonine (residue thr(200) in human camkiv) by ca(2+)/calmodulin-dependent kinase kinase leads to increased camkiv kinase activity.

SIGNOR-134649

Q96QV6

Q86Y13

0

monoubiquitination

up-regulates activity

0.2

2A-HUB catalyzes monoubiquitination of H2A at lysine 119, functioning as a combinatoric component of the repression machinery required for specific gene regulation programs. Thus, 2A-HUB mediates a selective repression of a specific set of chemokine genes in macrophages, critically modulating migratory responses to TLR activation. H2A monoubiquitination acts to prevent FACT recruitment at the transcriptional promoter region, blocking RNA polymerase II release at the early stage of elongation.

SIGNOR-271761

P35916

P12931

0

phosphorylation

up-regulates

0.513

Vegfr-3 is a direct c-src target and mass spectrometry analysis identified the sites phosphorylated by c-src as tyrosine 830, 833, 853, 1063, 1333, and 1337 vegfr-3 phosphorylation activates the recruitment to the receptor of the adaptor proteins crki/ii and shc inducing activation of jnk.

SIGNOR-165035

P20248

P24941

0

phosphorylation

up-regulates

0.977

Here we present evidence from in vitro and in vivo assay systems that the degradation of human cyclin a can be inhibited by kinase-inactive mutants of cdk2 and cdc2cdk2 can phosphorylate cyclin a on ser-154

SIGNOR-74466

P05771

Q13224

1

phosphorylation

up-regulates activity

0.364

These results indicate that PKC can directly phosphorylate S1303 and S1323 in the NR2B C terminus, leading to enhanced currents through NMDA receptor channels.

SIGNOR-249087

Q9UGL1

P09874

0

relocalization

up-regulates activity

0.354

The mechanism of KDM5B recruitment is quite specific and requires the presence of nucleosomes containing histone variant MacroH2A1.1 and PARylation by PARP1.

SIGNOR-271574

Q00987

O15297

0

dephosphorylation

up-regulates

0.681

Wip1 interacts with and dephosphorylates mdm2 at serine 395, a site phosphorylated by the atm kinase. Dephosphorylated mdm2 has increased stability and affinity for p53, facilitating p53 ubiquitination and degradation.

SIGNOR-158328

P05787

P53778

0

phosphorylation

up-regulates

0.2

Keratin 8 (k8) serine 73 occurs within a relatively conserved type ii keratin motif . Here we show that ser-73 is exclusively phosphorylated in vitro by p38 mitogen-activated protein kinase. The ser-73 --> ala-associated filament reorganization defect is rescued by a ser-73 --> asp mutation. Also, disease-causing keratin mutations can modulate keratin phosphorylation and organization, which may affect disease pathogenesis.

SIGNOR-114067

P53350

O96017

1

phosphorylation

up-regulates

0.492

Plk1 overexpression enhances phosphorylation of chk2 at thr-68.

SIGNOR-96637

P16885

Q92835

0

dephosphorylation

down-regulates activity

0.312

An adaptor protein Dok-3 mediates the suppressive function of LYN. The Dok-3 phosphorylated by LYN upon BCR stimulation forms a complex with GRB2, which allows it to enter into the signalosome and associate with activation of SHIP protein. This translocation facilitates the efficient inhibition of PLCc2 and SYK from activation, subsequently resulting in the suppression of downstream Ca2+ signaling.

SIGNOR-268455

P28562

P04150

0

null

up-regulates quantity

0.58

Glucocorticoids inhibit MAP kinase via increased expression and decreased degradation of MKP-1|Both induction of MKP-1 expression and inhibition of its degradation are necessary for glucocorticoid-mediated inhibition of Erk-1/2 activation. In NIH-3T3 fibroblasts, although glucocorticoids up-regulate the MKP-1 level, they do not attenuate the proteasomal degradation of this protein and consequently they are unable to inhibit Erk-1/2 activity.

SIGNOR-253546

O94916

P80188

1

transcriptional regulation

up-regulates quantity by expression

0.329

As expected, the depletion of NFAT5 decreased the S100A4 and LCN2 mRNA levels (Figure 3a). In addition, chromatin immunoprecipitation (ChIP) assay using NFAT5 antibody indicated that NFAT5 was bound to the S100A4 and LCN2 promoters (Figure 3b, Supplementary Figure S3), as expected (Chen et al., 2009).

SIGNOR-274114

P35580

Q02078

0

transcriptional regulation

up-regulates quantity by expression

0.317

Myocyte enhancer factor-2 and serum response factor binding elements regulate fast Myosin heavy chain transcription in vivo. We show that the upstream promoter region of the gene most abundantly expressed in mouse skeletal muscles, IIb MyHC, retains binding activity and transcriptional activation for three positive transcription factors, the serum response factor, Oct-1, and myocyte enhancer factor-2, whereas the other two genes (IIa and IId/x) have nucleotide substitutions in these sites that reduce binding and transcriptional activation

SIGNOR-238763

Q8N264

Q13464

0

phosphorylation

up-regulates activity

0.433

ROCK phosphorylates FilGAP, and this phosphorylation stimulates its RacGAP activity and is a requirement for FilGAP-mediated bleb formation. | As shown in Fig. 5b, ROCK stimulated the incorporation of phosphate into FilGAP. We identified seven potential phosphorylation sites in FilGAP that was isolated by preparative SDSPAGE and subjected to trypsin digestion and mass spectrometry: Ser 391, Ser 402, Ser 413, Ser 415, Ser 437, Thr 452, and a cluster of serine and threonine residues (SSTTT) at position 573577 (see Supplementary Information, Table S2).

SIGNOR-249302

Q13315

P38398

1

phosphorylation

up-regulates

0.819

Results from this study indicate that the checkpoint protein kinase atm (mutated in ataxia telangiectasia) was required for phosphorylation of brca1 in response to ionizing radiation. Brca1 is phosphorylated at tyrosine residues in an atm-dependent, radiation-dependent manner.

SIGNOR-72075

Q9C009

Q15746

1

transcriptional regulation

down-regulates quantity by repression

0.2

Results from this analysis revealed that the inhibitory activity of HFH-1 was contained within the forkhead DNA-binding domain. Truncated HFH-1 proteins that lack the entire forkhead domain were unable to repress telokin promoter activity, in contrast expression of the forkhead domain alone was able to repress promoter activity

SIGNOR-261609

P09758

P17252

0

phosphorylation

down-regulates activity

0.2

Analyses using HCT116 cells expressing WT Trop-2 (HCT116/WT) or Trop-2 alanine-substituted at Ser-303 (HCT116/S303A) or Ser-322 (HCT116/S322A) revealed that Trop-2 is phosphorylated at Ser-322. sing protein kinase C (PKC) inhibitors and PKC-specific siRNAs, we found that PKCα and PKCδ are responsible for Trop-2 phosphorylation.

SIGNOR-273821

P02452

P13497

0

cleavage

up-regulates activity

0.681

BMP-1myc Expressed in COS-7 Cells Exhibits Procollagen C-proteinase Activity. Bone morphogenetic protein (BMP)-1, which belongs to the tolloid subgroup of astacin-like zinc metalloproteinases, cleaves the C-propeptides of procollagen at the physiologic site and is, therefore, a procollagen C-proteinase (PCP). Cleavage occurs between a specific alanine or glycine residue (depending on the procollagen chain) and an invariant aspartic acid residue in each of the three chains of procollagen.

SIGNOR-256342