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P60953
P98174
0
guanine nucleotide exchange factor
up-regulates activity
0.716
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-260551
P61586
Q16512
2
binding
up-regulates activity
0.852
PKNs bind to human pyrin and phosphorylate S208 and S242. Pyrin forms an inflammasome when mutant or in response to bacterial modification of the GTPase RhoA. We found that RhoA activated the serine-threonine kinases PKN1 and PKN2 that bind and phosphorylate pyrin. Phosphorylated pyrin bound to 14-3-3 proteins, regulatory proteins that in turn blocked the pyrin inflammasome.
SIGNOR-275465
P68400
P52907
1
phosphorylation
up-regulates
0.2
We demonstrate that ser9 of cpalpha is phosphorylated by protein kinase ck2 in vitro, that cpalpha is phosphorylated in vivo. Finally, we demonstrate that ckip-1 and ck2 inhibit the activity of actin capping protein at the barbed ends of actin filaments.
SIGNOR-135422
P47211
P08754
2
binding
up-regulates activity
0.452
Here we systematically quantified ligand-induced interactions between 148 GPCRs and all 11 unique G alpha subunit C-termini. For each receptor, we probed chimeric G alpha subunit activation via a transforming growth factor-alpha (TGF alpha) shedding response in HEK293 cells lacking endogenous Gq/11- and G12/13- signaling. | We defined positive coupling if any member of the subfamily scored LogRAi ≥ -1 and negative coupling if all of the members scored LogRAi < -1 (Figure 3A-B). ROC analysis gives AUC = 0.78 (Figure S4A) when considering high-confidence known coupling data and suggested a threshold of LogRAi ≥ -1.0 for defining true couplings. | The score associated to this interaction has a LogRAi ≥ -1.0.
SIGNOR-256830
Q76I76
P23528
1
dephosphorylation
up-regulates activity
0.732
Differential activities, subcellular distribution and tissue expression patterns of three members of Slingshot family phosphatases that dephosphorylate cofilin.|Cofilin, a key regulator of actin filament dynamics, is inactivated by phosphorylation at Ser-3 by LIM-kinases and is reactivated by dephosphorylation by a family of protein phosphatases, termed Slingshot (SSH).
SIGNOR-248733
Q02297
Q15303
2
binding
up-regulates
0.904
The neuregulins (also called heregulins and neu differentiation factors) nrg-1 and nrg-2 bind erbb-3 and erbb-4;and nrg-3 and nrg-4 bind erbb-4.
SIGNOR-122053
P0DP23
P06213
0
phosphorylation
down-regulates
0.403
The in vitro phosphorylation of calmodulin by the insulin receptor tyrosine kinase. Phosphorylated calmodulin does not exhibit the characteristic ca2+ shift normally observed with calmodulin in electrophoretic gels, an observation that is consistent with this modification affecting the biological activity of the molecule.
SIGNOR-24782
P08047
P24941
0
phosphorylation
up-regulates activity
0.423
Mutation of Sp1 Ser59 abrogates the cyclin A€“CDK augmentation of Sp1-dependent transcriptional transactivation
SIGNOR-248232
P11362
Q15118
1
phosphorylation
up-regulates
0.347
Mitochondrial pdhk1 is tyrosine phosphorylated and activated by fgfr1 in cancer cells further mass spectrometric analysis identified three tyrosine residues of pdhk1, including y136, y243 and y244, that are phosphorylated by fgfr1
SIGNOR-193454
P49841
O00327
1
phosphorylation
down-regulates
0.382
Gsk3beta phosphorylates bmal1 specifically on ser 17 and thr 21 and primes it for ubiquitylation. In the absence of gsk3beta-mediated phosphorylation, bmal1 becomes stabilized and bmal1 dependent circadian gene expression is dampened.
SIGNOR-162786
Q15772
Q9BR39
1
phosphorylation
up-regulates activity
0.36
Studies in HEK293 cells confirmed that SPEG overexpression increases JPH2 phosphorylation .
SIGNOR-279759
Q99704
O14920
0
phosphorylation
up-regulates
0.253
Ikkbeta phosphorylates dok1 s(439)s(443) and s(446)s(450) after tnf-alpha, il-1, or gamma-radiation. mutant dok1 a(439), a(443), a(446), and a(450) differed from wild-type dok1 in not inhibiting platelet-derived growth factor-induced extracellular signal-regulated kinase 1/2 phosphorylation or cell growth. Mutant dok1 a(439), a(443), a(446), and a(450) also did not promote cell motility whereas wild-type dok1 promoted cell motility.
SIGNOR-131447
P51636
P68400
0
phosphorylation
up-regulates activity
0.32
We show that caveolin-2 is phosphorylated in vivo at two serine residues and that the phosphorylation of caveolin-2 is necessary for its actions as a positive regulator of caveolin-1 during organelle biogenesis in prostate cancer cells. Mutation of the primary phosphorylation sites on caveolin-2, serine 23 and 36, reduces the number of plasmalemma-attached caveolae
SIGNOR-101110
P51608
Q9NWB1
1
transcriptional regulation
down-regulates quantity by repression
0.28
MeCP2 binds to the promoter region of six target genes. ChIP with anti-MeCP2 antibody shows that MeCP2 binds to the promoter regions of activated targets Sst, Oprk1, Gamt, and Gprin1, and repressed targets Mef2c and A2bp1.
SIGNOR-264681
Q9H492
Q96A56
2
binding
up-regulates
0.348
Tp53inp1-lc3 interaction occurs via a functional lc3-interacting region (lir).
SIGNOR-196670
P00533
O14964
1
phosphorylation
up-regulates activity
0.637
We have analysed hrs phosphorylation in response to epidermal growth factor (egf) stimulation and show that the evolutionary conserved tyrosines y329 and y334 provide the principal phosphorylation sitesover-expression of wild-type hrs or a double mutant, y329/334f, defective in egf-dependent phosphorylation, substantially retard egf receptor (egfr) degradation
SIGNOR-100246
Q13873
Q13253
2
binding
down-regulates activity
0.588
Noggin binds the domain that is re-quired for bmp-7 to interact with bmp type i and type ii receptors.Noggin Inhibits bmp by blocking the molecular interfaces of the binding epitopes for both type i and type ii receptors (pmid 12478285)
SIGNOR-195612
P01236
Q13177
0
phosphorylation
up-regulates
0.337
Phosphorylated form of prolactin has a higher affinity for heparin.
SIGNOR-186211
Q6P1M3
P41743
0
phosphorylation
up-regulates activity
0.687
This finding indicates that both mLgl-2 and mLgl-1 are phosphorylated in vivo in an aPKC lambda activity-dependent manner.
SIGNOR-263180
P06241
Q13322
1
phosphorylation
down-regulates
0.38
Grb10 tyrosine phosphorylation was stimulated by expression of constitutively active src or fyn in cells and by incubation with purified src or fyn in vitro. The insulin stimulated or src/fyn-mediated tyrosine phosphorylation in vivo was significantly reduced when grb10 tyrosine 67 was changed to glycine. This mutant form of grb10 bound with higher affinity to the ir in cells than that of the wild-type protein, suggesting that tyrosine phosphorylation of grb10 may normally negatively regulate its binding to the ir.
SIGNOR-78702
Q9H0N0
Q7Z7G8
2
binding
down-regulates activity
0.2
Cohen syndrome-associated protein COH1 physically and functionally interacts with the small GTPase RAB6 at the Golgi complex and directs neurite outgrowth. COH1 Golgi Localization Is Mediated by Active RAB6 . COH1 Interacts with All Three Mammalian RAB6 Homologues
SIGNOR-269204
P01880
Q86YJ5
0
ubiquitination
down-regulates quantity by destabilization
0.2
MARCH9, a member of the RING-CH family of transmembrane E3 ubiquitin ligases, down-regulates CD4, major histocompatibility complex-I (MHC), and ICAM-1 in lymphoid cells. To identify novel MARCH9 substrates, we used high throughput flow cytometry and quantitative mass spectrometry by stable isotope labeling by amino acids in cell culture (SILAC) to determine the differential expression of plasma membrane proteins in a MARCH9-expressing B cell line. This combined approach identified 13 potential new MARCH9 targets. 
SIGNOR-271542
P06493
Q01196
1
phosphorylation
up-regulates
0.341
Phosphorylation of runx1 on ser-303 by cdks leads its ubiquitin-mediated degradation during g2/m (19). We developed additional evidence that cdks phosphorylate ser-303 and found that ser-48 and ser-424 are also substrates of cdk1/cyclin b and cdk6/cyclin d3. Moreover, we demonstrated that phosphorylation of ser-48, ser-303, and ser-424 strengthens the ability of runx1 to activate transcription and to stimulate proliferation of the ba/f3 hematopoietic cell line (20).
SIGNOR-169322
P68400
Q01105-2
1
phosphorylation
down-regulates
0.365
Ckii-mediated phosphorylation at ser9 hinders nuclear import of set
SIGNOR-200798
Q8N6D2
P27449
1
polyubiquitination
down-regulates quantity by destabilization
0.466
The data indicated that RNF182 targeted ATP6V0C for degradation by the ubiquitin-proteosome pathway.
SIGNOR-271771
Q13627
Q96EB6
1
phosphorylation
up-regulates activity
0.54
DYRK1A and DYRK3 directly phosphorylate SIRT1 at Thr(522), promoting deacetylation of p53.|DYRK1A and DYRK3 promote cell survival through phosphorylation and activation of SIRT1.
SIGNOR-278473
P42263
Q5JU85
0
relocalization
up-regulates quantity
0.2
BRAG1 increases the synaptic recycling pool of AMPARs.these data suggest that the BRAG1 enhancement of AMPAR transmission is mediated by the increased expression of the recycling pool of synaptic GluA2/3 receptors.
SIGNOR-264914
Q02539
Q15369
0
phosphorylation
up-regulates
0.2
Our results also show the potential function of p-tefb phosphorylation of h1, namely, to increase h1 dissociation from actively transcribed dna. P-tefb preferentially phosphorylates the ser-183 phosphorylation site of histone h1.1
SIGNOR-166120
O15111
P42345
1
phosphorylation
up-regulates activity
0.511
In those studies, we found that IKKalpha interacts with and phosphorylates mTOR in the mTORC1 complex to activate mTORC1, and that Akt signaling drives the IKKalpha-mTORC1 interaction.|We then studied whether IKKalpha promotes Akt and mTOR activity in other mammalian cancer cell lines.
SIGNOR-279607
Q8N1W1
P50148
2
binding
up-regulates activity
0.291
Taken together, the results suggest that active G13 and Gq form a complex with Rgnef and that G13 and Gq are upstream activators of Rgnef.
SIGNOR-278065
P78552
P05112
2
binding
up-regulates
0.782
It is now known that this alternate receptor is a heterodimer, the type ii il-4 receptor or the il-13 receptor, which is comprised of IL-4R And IL-13R1.
SIGNOR-100759
Q9BQQ3
Q08379
2
binding
up-regulates quantity by stabilization
0.879
Previous studies have implicated the GM130–GRASP65 complex in diverse Golgi functions. Therefore, GM130–GRASP65 interactions are required for Golgi ribbon formation.|A surprising clue came from the observation that GM130 was required for stability of GRASP65.
SIGNOR-260601
O00506
Q9BSQ5
1
phosphorylation
up-regulates
0.5
CCM2 can be phosphorylated by STK25, and the kinase activity of STK25 is required for death signaling.
SIGNOR-263144
O15530
Q04759
1
phosphorylation
up-regulates
0.572
We demonstrate that 3-phosphoinositide-dependent kinase 1 (pdk1) has an essential role in this pathway by regulating the activation of pkc and through signal-dependent recruiting of both pkc and card11 to lipid rafts.
SIGNOR-134869
Q9Y6Q9
P17612
0
phosphorylation
up-regulates
0.364
Herein, we report the successful identification of six functional in vivo src-3 phosphorylation sites.
SIGNOR-129349
P01135
P00533
2
binding
up-regulates activity
0.899
Our data indicate that a subset of cell lines is dependent on TGF-_-mediated activation of the EGFR for cell proliferation and strongly suggest that pancreatic tumors expressing high levels of TGF-_ and phosphorylated (activated) EGFR are EGFR-dependent in vitro and in vivo.
SIGNOR-93199
P49286
P09471
2
binding
up-regulates activity
0.25
Here we systematically quantified ligand-induced interactions between 148 GPCRs and all 11 unique G alpha subunit C-termini. For each receptor, we probed chimeric G alpha subunit activation via a transforming growth factor-alpha (TGF alpha) shedding response in HEK293 cells lacking endogenous Gq/11- and G12/13- signaling. | We defined positive coupling if any member of the subfamily scored LogRAi ≥ -1 and negative coupling if all of the members scored LogRAi < -1 (Figure 3A-B). ROC analysis gives AUC = 0.78 (Figure S4A) when considering high-confidence known coupling data and suggested a threshold of LogRAi ≥ -1.0 for defining true couplings. | The score associated to this interaction has a LogRAi ≥ -1.0.
SIGNOR-256986
Q07157
Q6T4R5
2
binding
up-regulates activity
0.2
NHS-A is a novel interactor of ZO-1 and is expected to have a role at tight junctions. Its recruitment to these junctions is dependent upon their assembly.
SIGNOR-253567
Q9NV31
O00566
2
binding
up-regulates activity
0.881
Mpp10 represents a platform for the interaction of multiple factors within the 90S pre-ribosome. In eukaryotes, ribosome assembly is a highly complex process that involves more than 200 assembly factors that ensure the folding, modification and processing of the different rRNA species as well as the timely association of ribosomal proteins. One of these factors, Mpp10 associates with Imp3 and Imp4 to form a complex that is essential for the normal production of the 18S rRNA.
SIGNOR-261173
P50750
P49459
1
phosphorylation
up-regulates activity
0.449
CDK9 phosphorylates RNA polymerase II CTD at serine 2 to recruit the RNF20/40 E3 ubiquitin ligase, which is required for H2Bub1, and phosphorylates UBE2A at serine 120 to increase its activity in regulating H2Bub1.
SIGNOR-279025
Q5H8A4
Q8TEQ8
2
binding
up-regulates quantity by stabilization
0.398
We show that the human homolog of Gpi7p, termed hGPI7, binds to and is stabilized by PIG-F and that hGPI7 competes with PIG-O for binding to PIG-F. PIG-F Binds to and Stabilizes hGPI7 and PIG-O Independently. These results are consistent with the hypothesis that overexpression of hGPI7 decreases the biosynthetic activity of PIG-O by decreasing the available PIG-F, thereby destabilizing PIG-O.
SIGNOR-261359
P06400
P04049
0
phosphorylation
down-regulates activity
0.578
Further, Raf-1 was able to phosphorylate Rb in vitro quite efficiently.|Raf-1 can inactivate Rb function and can reverse Rb mediated repression of E2F1 transcription and cell proliferation efficiently.
SIGNOR-279481
P11021
P18850
2
binding
down-regulates activity
0.821
Similar to PERK and IRE1, ATF6 is activated by ER stress-induced dissociation from GRP78
SIGNOR-260179
P00519
P32119
1
phosphorylation
down-regulates activity
0.284
Inactivation of peroxiredoxin I by phosphorylation allows localized H(2)O(2) accumulation for cell signaling. To determine whether Prxs are phosphorylated, we subjected recombinant human PrxI and II to an in vitro kinase assay with two nonreceptor PTKs, Lck and Abl, in the presence of [γ-32P]ATP. Both PTKs phosphorylated PrxI and PrxII. Phosphorylation of the wild-type protein was detected, whereas that of the Y194F mutant was not (Figure 1B), indicating that Tyr194 is the only site of tyrosine phosphorylation.
SIGNOR-276280
P67870
Q13422
1
phosphorylation
down-regulates
0.2
We identified four novelikarosphosphorylation sites that are phosphorylated by ck2 kinase. / ck2-mediated phosphorylation inhibits ikaros' localization to pc-hc / hyperphosphorylation of ikaros promotes its degradation by the ubiquitin/proteasome pathway
SIGNOR-174844
Q96HS1
Q8IVP5
1
dephosphorylation
up-regulates activity
0.627
Here, we identify that the mitochondrially localized PGAM5 phosphatase interacts with and dephosphorylates FUNDC1 at serine 13 (Ser-13) upon hypoxia or carbonylcyanide p-trifluoromethoxyphenylhydrazone (FCCP) treatment. Dephosphorylation of FUNDC1 catalyzed by PGAM5 enhances its interaction with LC3, which is abrogated following knockdown of PGAM5 or the introduction of a cell-permeable unphosphorylated peptide encompassing the Ser-13 and LIR of FUNDC1. We further observed that CK2 phosphorylates FUNDC1 to reverse the effect of PGAM5 in mitophagy activation.
SIGNOR-273654
Q5JR12
P53779
0
phosphorylation
down-regulates
0.2
Specific phosphorylation of pp2czeta at ser (92) by stress-activated jnk attenuates its phosphatase activity in cells.
SIGNOR-178926
P34925
Q86YT6
0
ubiquitination
down-regulates
0.327
We discovered that ryk both physically and functionally interacts with the e3 ubiquitin ligase mind bomb 1 (mib1).We Found that overexpressed ryk and mib1 colocalized and that the overexpression of mib1 leads to the loss of surface ryk expression. In addition, biochemical studies revealed that mib1 promotes the ubiquitination and degradation of ryk. Endogenous ryk and mib1 were required for the wnt-dependent activation of wnt/ctnnb1 signaling
SIGNOR-176282
Q99704
P05556
2
binding
down-regulates activity
0.315
Integrins also bind to many PTBdomain-containing proteins (Calderwood et al., 2003) – including Dok1 and integrincytoplasmic-domain-associated protein 1 (ICAP1) – and these can compete with talin for binding to integrin and so can impair activation
SIGNOR-257669
Q86U44
Q9GZV5
1
transcriptional regulation
up-regulates quantity by expression
0.2
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-265955
Q14571
Q13557
0
phosphorylation
down-regulates activity
0.308
Phopho-specific antibodies demonstrate that InsP(3)R2 Ser-150 is phosphorylated in vivo by CaMKIIδ. The results of this study show that serine 150 of the InsP(3)R2 is phosphorylated by CaMKII and results in a decrease in the channel open probability.
SIGNOR-262692
P42224
P23458
0
phosphorylation
up-regulates activity
0.79
The central event in cytokine_dependent transcriptional regulation is phosphorylation of STATs on a single tyrosine residue at their C_terminus (Darnell, 1997b). The reaction is catalyzed by cytokine receptor_associated tyrosine kinases of the Janus type (Jak) at the cell membrane and triggers the homo_ and heterodimerization of STAT molecules via reciprocal phosphotyrosine“SH2 domain interactions
SIGNOR-236373
P43351
P00519
0
phosphorylation
up-regulates activity
0.685
C-Abl tyrosine kinase associates with and phosphorylates Rad52 on tyrosine 104. he functional significance of c-Abl-dependent phosphorylation of Rad52 is underscored by our findings that cells that express the phosphorylation-resistant Rad52 mutant, in which tyrosine 104 is replaced by phenylalanine, exhibit compromised nuclear foci formation in response to IR.
SIGNOR-251435
Q9UBU3
Q92847
2
binding
up-regulates
0.722
In contrast to wild-type mice, acute treatment of ghsr- mice with ghrelin stimulated neither gh release nor food intake, showing that the ghsr is a biologically relevant ghrelin receptor.
SIGNOR-123948
O75581
O15169
1
relocalization
down-regulates activity
0.835
The phosphorylation of lrp6 generates a docking site for axin and recruits it to the plasma membrane, where axin is inactivated and/or targeted for degradation by an unknown mechanism.
SIGNOR-148668
Q16650
Q8TBJ5
1
transcriptional regulation
down-regulates quantity by repression
0.486
We found that TBR1 promotes the identity of corticothalamic neurons and represses subcerebral fates through reducing expression of Fezf2 and CTIP2.|(3) Chromatin immunoprecipitation analysis using TBR1 antibodies showed that TBR1 bound to a conserved region in the Fezf2 gene.
SIGNOR-268967
O14640
Q9UJX6
2
binding
down-regulates
0.239
We now report that the anaphase-promoting complex (apc/c) recognizes a d-box motif of dvl and ubiquitylates dvl on a highly conserved lysine residue.We now report that expression of the apc/c subunit anapc2 activates the apc/c-dependent degradation of dvl by disrupting canonical wnt signaling.
SIGNOR-188393
Q13490
P57078
1
polyubiquitination
up-regulates activity
0.355
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.Lysine residues K51 and K145 of RIP4 are critical for cIAP1-mediated ubiquitination and NF-kB activation.
SIGNOR-272708
Q7TFA0
Q14653
2
binding
down-regulates activity
0.2
Accessory proteins 8b and 8ab of severe acute respiratory syndrome coronavirus suppress the interferon signaling pathway by mediating ubiquitin-dependent rapid degradation of interferon regulatory factor 3.We also found that proteins 8b and 8ab could physically interact with IRF3. Overexpression of 8b and 8ab resulted in the reduction of poly (I:C)-induced IRF3 dimerization and inhibition of the IFN-β signaling pathway.
SIGNOR-260239
Q99500
P19086
2
binding
up-regulates activity
0.385
Here we systematically quantified ligand-induced interactions between 148 GPCRs and all 11 unique G alpha subunit C-termini. For each receptor, we probed chimeric G alpha subunit activation via a transforming growth factor-alpha (TGF alpha) shedding response in HEK293 cells lacking endogenous Gq/11- and G12/13- signaling. | We defined positive coupling if any member of the subfamily scored LogRAi ≥ -1 and negative coupling if all of the members scored LogRAi < -1 (Figure 3A-B). ROC analysis gives AUC = 0.78 (Figure S4A) when considering high-confidence known coupling data and suggested a threshold of LogRAi ≥ -1.0 for defining true couplings. | The score associated to this interaction has a LogRAi ≥ -1.0.
SIGNOR-257330
Q9UKC9
Q96GD4
2
binding
down-regulates quantity by destabilization
0.483
The SCF complex contains a catalytic core consisting of Skp1, Cullin1, and the E2 ubiquitin-conjugating (Ubc) enzyme and a F box component that acts as a receptor targeting numerous substrates via phosphodegron elicited interactions. our screening studies suggested that FBXL2 also targets Aurora B protein for ubiquitination and degradation.
SIGNOR-272097
Q02880
P48730
0
phosphorylation
down-regulates quantity by destabilization
0.2
Specifically, DNA damage signal, triggered by teniposide (VM-26) treatment, activates ATM, cooperating with CK1 to phosphorylate TOP2β on Ser1134 and Ser1130, respectively, in a canonical degron motif to facilitate β-TrCP binding and subsequent degradation.CK1 binds with and phosphorylates TOP2β at Ser1130 to promote its degradation by VM-26.
SIGNOR-277509
O15350
P46777
2
binding
up-regulates
0.341
We report that rpl5 and rpl11 can also enhance the transcriptional activity of a p53 homolog tap73
SIGNOR-205517
Q8N122
Q9Y478
0
phosphorylation
down-regulates
0.466
Ampk in turn inactivates mtorc1 directly by phosphorylating raptor and indirectly by phosphorylating tsc2.
SIGNOR-173041
O75444
P10242
2
binding
down-regulates
0.66
Full-length c-maf binds to the c-myb and ets-1. / c-maf inhibits c-myb and ets-1 transcriptional activity.
SIGNOR-56811
Q9NWZ3
Q9HAT8
1
phosphorylation
up-regulates
0.638
Pellino2 is one of the firstsubstrates identified for irak1 andirak4.
SIGNOR-103717
P08238
P12931
0
phosphorylation
up-regulates
0.587
C-src directly phosphorylates hsp90 on tyrosine 300 residue and that this event is essential for vegf-stimulated enos association to hsp90 and thus no release from endothelial cells.
SIGNOR-157781
P22314
P06493
0
phosphorylation
up-regulates
0.405
Ubiquitin-activating enzyme, e1, is phosphorylated in mammalian cells by the protein kinase cdc2. Each serine residue was independently mutated to an alanine and analyzed by two-dimensional electrophoresis;only serine 4 was phosphorylated. Disruption of the basic amino acids within the nls resulted in loss of exclusive nuclear localization and a 90-95% decrease in the phosphorylation of ha1-e1
SIGNOR-31157
P08700
Q16649
0
transcriptional regulation
up-regulates quantity by expression
0.527
NF-IL3A transactivates the IL-3 promoter through the A region sequences.
SIGNOR-266222
P41594
P63092
2
binding
up-regulates activity
0.357
MGluRs are members of the G-protein-coupled receptor (GPCR) superfamily, the most abundant receptor gene family in the human genome. GPCRs are membrane-bound proteins that are activated by extracellular ligands such as light, peptides, and neurotransmitters, and transduce intracellular signals via interactions with G proteins. The resulting change in conformation of the GPCR induced by ligand binding activates the G protein, which is composed of a heterotrimeric complex of α, β, and γ subunits.
SIGNOR-264078
Q9ULB1
Q07666
0
post transcriptional regulation
up-regulates activity
0.332
Activity-dependent alternative splicing of Nrxn1 requires the KH-domain RNA binding protein SAM68 which associates with RNA response elements in the Nrxn1 pre-mRNA. Our findings uncover SAM68 as a key regulator of dynamic control of Nrxn1 molecular diversity and activity-dependent alternative splicing in the central nervous system.
SIGNOR-269057
Q9GZV5
P23760
2
binding
up-regulates
0.454
These results indicate that pax3 specifically interacts with taz both in vitro and in vivo.
SIGNOR-236879
Q02548
P43405
0
phosphorylation
down-regulates activity
0.422
PAX5 tyrosine phosphorylation by SYK co-operatively functions with its serine phosphorylation to cancel the PAX5-dependent repression of BLIMP1: A mechanism for antigen-triggered plasma cell differentiation.
SIGNOR-269084
P30556
Q9UBI6
2
binding
up-regulates
0.434
These results indicate that ang ii increases endothelial arginase activity/expression through galfa12/13 g proteins coupled to at(1) receptors and subsequent activation of rhoa/rock/p38 mapk pathways leading to endothelial dysfunction.
SIGNOR-171763
Q16539
P19634
1
phosphorylation
up-regulates
0.571
Trophic factor withdrawal: p38 mitogen-activated protein kinase activates nhe1, which induces intracellular alkalinization. activated p38 mapk directly phosphorylated the c terminus of nhe1 within a 40-amino-acid region. Analysis by mass spectroscopy identified four phosphorylation sites on nhe1, thr 717, ser 722, ser 725, and ser 728.
SIGNOR-111043
Q9UGI9
Q8IYT8
0
phosphorylation
down-regulates
0.2
Ulk1/2 in turn phosphorylates all three subunits of ampk and thereby negatively regulates its activity.
SIGNOR-173095
Q15466
O00482
2
binding
down-regulates
0.563
Modulation of human nuclear receptor lrh-1 activity by phospholipids and shpthe human nuclear receptor liver receptor homolog 1 (hlrh-1) plays an important role in the development of breast carcinomas. This orphan receptor is efficiently downregulated by the unusual co-repressor shp
SIGNOR-134202
Q04917
P46527
2
binding
down-regulates
0.502
14-3-3_, 14-3-3_, and 14-3-3_ (but not 14-3-3_ and 14-3-3_) could form a complex with p27kip1 / we discovered that akt-mediated p27kip1phosphorylation directly induces p27kip1binding to 14-3-3 and cytoplasmic localization through phosphorylating the newly identified thr198residue.
SIGNOR-109771
Q15485
O00187
2
binding
up-regulates activity
0.608
In the lectin pathway, mannose-binding lectin (MBL) and ficolins bind to pathogens and activate MBL-associated serine protease-2 (MASP-2)
SIGNOR-263413
P28329
Q05655
0
phosphorylation
up-regulates quantity
0.311
Finally, basal ChAT phosphorylation in neurons is mediated predominantly by PKC at Ser-476, with PKC activation increasing phosphorylation at Ser-440 and enhancing ChAT activity.
SIGNOR-249272
Q9Y5H9
Q9Y5G9
2
binding
up-regulates activity
0.2
The clustered protocadherins comprise the largest subfamily of the cadherin superfamily and are predominantly expressed in the nervous system. Pcdh-alpha proteins interact with beta1-integrin to promote cell adhesion. They also form oligomers with Pcdh-gamma proteins at the same membrane sites.
SIGNOR-265675
P49137
Q9Y385
1
phosphorylation
down-regulates quantity by destabilization
0.334
Endoplasmic reticulum-associated ubiquitin-conjugating enzyme Ube2j1 is a novel substrate of MK2 (MAPKAP kinase-2) involved in MK2-mediated TNFα production. These findings strongly suggest that MK2 directly phosphorylates Ube2j1 at Ser(184) upon p38-activating stress in vivo.
SIGNOR-263091
P06493
Q96PY5
1
phosphorylation
up-regulates activity
0.2
In this study we have identified the formin FMNL2 as a novel substrate for CDK1 that plays a role in maintaining adhesion complexes and facilitates cell cycle–dependent changes in adhesion complexes. Knockdown of FMNL2 or expression of a nonphosphorylatable S1016A mutant resulted in the loss of adhesion complexes and stress fibers within the cell body, with peripheral structures being maintained. 
SIGNOR-273555
P06239
P29353
1
phosphorylation
up-regulates activity
0.744
We show that during TCR signaling, the tyrosines Y239, Y240 and Y317 of Shc are the primary sites of tyrosine phosphorylation. CD4/Lck-dependent tyrosine phosphorylation on Shc was markedly diminished when Y317 was mutated, suggesting a preference of Lck for the Y317 site. tyrosine phosphorylation of Shc may play a key role in T lymphocyte proliferation via interaction of phosphorylated Shc with downstream molecules involved in activation of Ras and Myc proteins
SIGNOR-251388
P84243
Q96T68
0
methylation
up-regulates activity
0.2
Here, we have characterized a previously undescribed member of the histone H3K9 methyltransferase family named CLLD8 (or SETDB2 or KMT1F). This protein contributes to the trimethylation of both interspersed repetitive elements and centromere-associated repeats and participates in the recruitment of heterochromatin protein 1 to centromeres. Methylation of histone H3 at lysine 9 (H3K9) has emerged as an important player in the formation of heterochromatin, chromatin condensation, and transcriptional repression.
SIGNOR-263894
P17947
P15976
2
binding
down-regulates activity
0.62
We find that PU.1 interacts directly with GATA-1, a zinc finger transcription factor required for erythroid differentiation. Interaction between PU.1 and GATA-1 requires intact DNA-binding domains in both proteins. PU.1 represses GATA-1-mediated transcriptional activation.
SIGNOR-256049
P35222
Q9NW38
0
ubiquitination
up-regulates activity
0.2
Here we provide evidence that FANCL increases the activity and expression of beta-catenin, a key pluripotency factor in hematopoietic stem cells.|We show that FANCL ubiquitinates \u03b2-catenin with atypical ubiquitin chain extension known to have nonproteolytic functions.
SIGNOR-278651
P35251
P06493
0
phosphorylation
down-regulates activity
0.245
Phosphorylation of the PCNA binding domain of the large subunit of replication factor C on Thr506 by cyclin-dependent kinases regulates binding to PCNA|Replication factor C (RF-C) complex binds to DNA primers and loads PCNA onto DNA, thereby increasing the processivity of DNA polymerases. |Phosphorylation of either RF-Cp145 as a part of the RF-C complex or RF-Cp145 domain B by cdk-cyclin kinases inhibits their ability to bind PCNA.
SIGNOR-265504
Q9BUN8
P00441
2
binding
down-regulates activity
0.457
Various proteins involved in ERAD have been identified recently (Meusser et al. 2005). Among them, components of the retro-translocation machinery including ATPase p97, its cofactors Ufd1 and Npl4, and the ER membrane proteins Derlin-1 and VIMP are of key importance to ERAD function |Here we show that SOD1(mut) specifically interacted with Derlin-1, a component of endoplasmic reticulum (ER)-associated degradation (ERAD) machinery and triggered ER stress through dysfunction of ERAD.
SIGNOR-262785
P06213
P60484
1
phosphorylation
down-regulates activity
0.442
Our results show that the kinase region of IRβ subunit physically binds to PTEN and phosphorylates on Y27 and Y174. In the current study, we discovered that IR also downregulates PTEN through tyrosine phosphorylation and suggest that Y27 and 174 are the two key tyrosines.
SIGNOR-276470
P61586
Q14CB8
0
gtpase-activating protein
down-regulates activity
0.568
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-260471
O94782
Q9NVI1
1
deubiquitination
down-regulates activity
0.666
Phosphorylation of FANCI may also turn the ubiquitinated ID complex into a poor substrate for deubiquitination by the USP1–UAF1 complex, resulting in increased levels of monoubiquitinated FANCD2.
SIGNOR-263272
P49840
O75581
1
phosphorylation
up-regulates activity
0.632
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-275398
P41743
P08151
1
phosphorylation
up-regulates activity
0.402
Although functioning downstream of SMO, aPKC-\u03b9/\u03bb phosphorylates and activates GLI1, resulting in maximal DNA binding and transcriptional activation [ xref ].
SIGNOR-279262
P17612
P19429
1
phosphorylation
up-regulates activity
0.423
Phosphorylation at ser 23/24 (e.g., by pka or pkg) results in reduction in myofilament ca2+ sensitivity and an increase in crossbridge cycling rate, leading to acceleration of relaxation and an increase in power output but a reduced economy of contraction. Conversely, phosphorylation at ser 43/45 (by pkc) is associated with reduced maximum ca2+-activated force and decreased crossbridge cycling rates, which are likely to reduce power output and delay relaxation, with an increased economy of contraction.
SIGNOR-134605
Q92769
P68400
0
phosphorylation
up-regulates
0.619
Protein kinase ck2-mediated phosphorylation of hdac2 regulates co-repressor formation, deacetylase activity and acetylation of hdac2 by cigarette smoke and aldehydesstudies using unfractionated cell extracts with ck2 inhibitors suggest that protein kinase ck2 is the major source of hdac2 kinase. Finally, and perhaps most interesting, hdac2 phosphorylation promotes enzymatic activity, selectively regulates complex formation, but has no effect on transcriptional repression. Together, our data indicate that like many hdacs, hdac2 is regulated by post-translational modification, particularly phosphorylation.
SIGNOR-164795
O94804
P15311
1
phosphorylation
up-regulates activity
0.473
Ezrin activation by LOK phosphorylation involves a PIP 2 -dependent wedge mechanism.|The specificity of kinases depends on local peptide consensus sequences, which in the case of ezrin phosphorylation by LOK involves the hydrophobic residue Y565 positioned -2 residues from T567.
SIGNOR-278204
O75460
P17861-2
1
post transcriptional regulation
up-regulates quantity by expression
0.647
Upon activation by oligomerization and autophosphorylation, the cytosolic RNase domain of IRE1 mediates an unconventional splicing of the mRNA of X-box-binding protein 1 (XBP1). The spliced and frameshifted transcript encodes XBP1S, a bZIP transcription factor inducing the expression of numerous UPR effector genes that enhance ER folding capacity.
SIGNOR-260183
P61981
P55040
2
binding
up-regulates quantity by stabilization
0.266
In order to address whether Gem binds specific isoforms of 14-3-3, we determined the coassociation of Gem and 14-3-3 in the neuroblastoma cell line SY5Y. 14-3-3ζ, -γ, -τ, and -β were observed to bind to Gem. 14-3-3-bound Gem has a twofold-longer half-life than nonbound Gem (Fig. ​(Fig.6).6). A similar increase in protein stability following 14-3-3 binding has been described for the Wee1 kinase
SIGNOR-261713
P26358
Q9BZS1
1
transcriptional regulation
down-regulates quantity by repression
0.488
Our results showed that arsenic induced the high expression of DNMT1 and Foxp3 gene promoter methylation level, thereby inhibiting the expression levels of Foxp3, followed by decreasing Tregs and reducing related anti-inflammatory cytokines, such as interleukin 10 (IL-10) and interleukin 10 (IL-35)
SIGNOR-269053