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Q13976
Q9UI08
1
phosphorylation
down-regulates activity
0.2
 Vertebrate Ena/VASP proteins are phosphorylated by PKA, as well as PKG, and the phosphorylation is required for full function in a number of cellular contexts
SIGNOR-268290
Q2NKX8
P53350
0
relocalization
up-regulates
0.88
Human pich was identified as an interaction partner and substrate of plk1. Our data indicate that plk1 prevents the association of pich with chromosome arms and restricts its localization to the kt/centromere region
SIGNOR-152136
Q00613
P53350
0
phosphorylation
down-regulates
0.444
Hsf1 was phosphorylated by plk1 at ser(216) of the dsgxxs motif during the timing of mitosis and a phospho-defective mutant form of hsf1 inhibited mitotic progression. Phosphorylated hsf1 during spindle pole localization underwent ubiquitin degradation through the scf(beta-trcp) pathway.
SIGNOR-180915
P63000
P31431
2
binding
up-regulates activity
0.503
Rac1 is associated with Sdc4 and is activated by FN binding […] We observed that over-expression of Fzd7, or stimulation with FN resulted in increased levels of active Rac1 in primary myoblasts
SIGNOR-255849
Q96LB1
P63096
2
binding
up-regulates activity
0.2
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-257059
P17612
Q14643
1
phosphorylation
down-regulates activity
0.556
IP(3)R-I was phosphorylated by PKA and PKG in vitro and exclusively by PKG in vivo. Sequential phosphorylation by PKA and by PKG-Ialpha in vitro showed that PKA phosphorylated the same site as PKG (presumably S(1755)) and an additional PKA-specific site (S(1589)). Phosphorylation of IP(3)R-I in microsomes by PKG, PKA, or a combination of PKG and PKA inhibited IP(3)-induced Ca(2+) release to the same extent, implying that inhibition was mediated by phosphorylation of the PKG-specific site.
SIGNOR-249996
Q92626
P53420
1
catalytic activity
up-regulates quantity by stabilization
0.256
Peroxidasin (PXDN), an ECM protein with peroxidase activity, is integral to basement membrane consolidation through catalysis of sulfilimine bonds in collagen IV. PXDN has been shown to form dityrosine crosslinks and also catalyses sulfilimine bonds, in the presence of hypohalous acids, to connect collagen IV protomers, which are an integral component of the basement membrane
SIGNOR-265250
Q96MS0
P23528
1
post transcriptional regulation
up-regulates quantity by expression
0.2
Slit2 causes the miRNA miR-182 to release cofilin1 mRNA, potentiating cofilin1 local translation and resulting in growth cone collapse. The use of morpholinos or RNAi to knockdown robo2 and robo3 in X. laevis RGCs, would be useful to further confirm that Robo2 and Robo3 are the receptors involved in Slit2-dependent cofilin1 translation.
SIGNOR-268379
O15530
P12931
0
phosphorylation
up-regulates activity
0.585
Using site-directed mutants, we show that, although phosphorylation on tyr-373/376 is important for pdk1 activity, phosphorylation on tyr-9 has no effect on the activity of the kinase. Both of these residues can be phosphorylated by v-src tyrosine kinase in vitro, and co-expression of v-src leads to tyrosine phosphorylation and activation of pdk1.
SIGNOR-109533
P62877
P03372
1
ubiquitination
down-regulates quantity by destabilization
0.344
I3C-dependent activation of the aryl hydrocarbon receptor (AhR) initiates Rbx-1 E3 ligase-mediated ubiquitination and proteasomal degradation of ERalpha protein.
SIGNOR-271434
Q00987
Q06187
0
phosphorylation
down-regulates activity
0.278
Phosphorylation of MDM2 by BTK suppresses its ubiquitination activity.
SIGNOR-278330
P07332
P16284
1
phosphorylation
up-regulates activity
0.276
PECAM-1 Is Phosphorylated by Fer and, To a Lesser Extent, by Fes. These results suggest that Fer not only functions as a tyrosine kinase for PECAM-1 but also that Fer modulates the downstream signaling of PECAM-1 by inducing phosphorylation of SHP-2 and Gab1.
SIGNOR-262868
P24941
Q02363
1
phosphorylation
down-regulates
0.434
Id2 acts by forming heterodimers that are unable to bind to specific (e-box) dna sequences. Here we show that this activity can be overcome by phosphorylation of a serine residue within a consensus target site for cyclin-dependent kinases (cdks). In vitro, id2 can be phosphorylated by either cyclin e-cdk2 or cyclin a-cdk2_
SIGNOR-46397
Q14449
P06213
2
binding
down-regulates activity
0.761
Growth factor receptor-bound protein 14 (Grb14) interacts with insulin receptor (IR) through the between PH and SH2 (BPS) domain. Grb14-IR complex formation is initiated by insulin stimulation, and the binding event results in the inhibition of insulin signalling.
SIGNOR-264873
Q9NY28
P00533
1
glycosylation
down-regulates activity
0.2
Interestingly, the O-GalNAcylation of EGFR, which is the key factor related to the metastasis cascade, was impacted by GALNT8. Furthermore, our results suggested that the GALNT8-mediated O-GalNAcylation led to the suppression of the EGFR signaling pathway and metastatic potential in breast cancer cells. 
SIGNOR-269679
Q05209
P24941
0
phosphorylation
down-regulates activity
0.382
In the present study, we found that S19 site phosphorylation of PTPN12 by CDK2 discharged its antitumor activity by down-regulation of its inhibitory role in cell migration, but not affecting its other regulatory functions.
SIGNOR-277366
Q15424
Q13043
0
phosphorylation
down-regulates activity
0.2
In the present study, we demonstrate that the chromatin scaffold protein SAFB1 interacts with and is phosphorylated by MST1 and is a novel regulator of AR capable of integrating signaling between the AR and MST1 networks.
SIGNOR-279296
Q8IUH4
Q01726
1
palmitoylation
up-regulates activity
0.274
Collectively these results suggest that ZDHHC13 phosphorylation by ATR following UVB irradiation promotes its interaction with MC1R to stimulate MC1R palmitoylation.Activating MC1R palmitoylation rescues the defect of MC1R RHC variants
SIGNOR-273518
O43312
P63000
2
binding
up-regulates
0.2
Mim-b binds and activates rac via its irsp53/mim domain
SIGNOR-141573
O60674
O60885
1
phosphorylation
up-regulates quantity by stabilization
0.324
JAK2 induces tyrosine phosphorylation of BRD4 at Y97/Y98, resulting in BRD4 stabilization. 
SIGNOR-277312
P18848
P54577
1
transcriptional regulation
up-regulates quantity by expression
0.2
QRICH1 promotes the expression of translation-related genes. our combined ChIP-seq and RNA-seq analyses identified that QRICH1 and ATF4 were enriched at the promoters of these specific tRNA synthetases, and that ER stress positively regulated their transcription (Fig. 4I). Together, these findings suggest that QRICH1 and ATF4 modulate tRNA metabolic processes to promote secreted protein synthesis during ER stress.
SIGNOR-269431
Q9UBS0
P42345
0
phosphorylation
up-regulates
0.834
In response to insulin and nutrients, mtorc1, consisting of mtor, raptor (regulatory-associated protein of mtor), and mlst8, is activated and phosphorylates eukaryotic initiation factor 4e-binding protein (4ebp) and p70 s6 kinase to promote protein synthesis and cell size.
SIGNOR-154821
Q13547
Q96EP1
0
polyubiquitination
down-regulates quantity by destabilization
0.394
Histone deacetylase 1 (HDAC1), which represses transcription by deacetylating histones, was newly isolated as a Chfr-interacting protein. Chfr binds and downregulates HDAC1 by inducing its polyubiquitylation, both in vitro and in vivo. Together, these results suggest that the ubiquitin ligase activity of Chfr targets HDAC1 for degradation.
SIGNOR-271465
Q16555
O75116
0
phosphorylation
up-regulates
0.383
Rho-kinase phosphorylated crmp-2 at thr-555 in vitro.we demonstrated that crmp-2 is phosphorylated by rho-kinase in drg neurons during lpa-induced growth cone collapse.
SIGNOR-77543
Q13107
P31749
0
phosphorylation
up-regulates quantity by stabilization
0.465
AKT-mediated phosphorylation relocates nuclear USP4 to the cytoplasm and membrane and is required for maintaining its protein stability. 
SIGNOR-273482
O43524
Q99576
2
transcriptional regulation
up-regulates quantity by expression
0.395
We have analyzed the promoter of human gilz (glucocorticoid-induced leucine zipper), a dexamethasone-inducible gene that is involved in regulating apoptosis, and identified six glucocorticoid (GC)-responsive elements and three Forkhead responsive elements (FHREs).
SIGNOR-255950
P04637
Q8IW41
0
phosphorylation
up-regulates
0.76
Furthermore, we show that prak activates p53 by direct phosphorylation. prak phosphorylates p53 at ser37
SIGNOR-152847
Q14680
Q15831
0
phosphorylation
up-regulates
0.2
Site-directed mutagenesis indicated that thr167 and ser171, located between the dfg and ape motifs in the activation loop or t-loop, need to be autophosphorylated for melk to be active as a protein kinase (fig. 5). These sites are conserved in all other ampk-related protein kinases (fig. 4a), and the site corresponding to thr167 has been shown to be phosphorylated by protein kinase lkb1 (5).
SIGNOR-141038
Q00987
P46695
1
ubiquitination
down-regulates quantity by destabilization
0.349
FHL2 stimulates MDM2 mediated ubiquitination of IER3 by forming a ternary complex.|Scaffold protein FHL2 facilitates MDM2 mediated degradation of IER3 to regulate proliferation of cervical cancer cells.
SIGNOR-278824
O95837
P25021
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-257424
O15350
P46937
2
binding
up-regulates
0.716
Yap also interacts with p73, a p53 family pro-apoptotic transcription factor, to induce expression of genes such as bax, puma and pml.
SIGNOR-175934
Q9NPB6
P41743
0
phosphorylation
up-regulates quantity by stabilization
0.866
APKC associates and phosphorylates Par6 on S345. aPKC expression stabilizes Par6 protein levels. We show that the aPKC, PKCι, interacts with TGF-β receptors through Par6 and that these proteins localize to the leading edge of migrating cells. Furthermore, Par6 phosphorylation on serine 345 by TGF-β receptors is enhanced in the presence of aPKC. aPKC kinase activity, as well as an association with Par6, were found to be important for Par6 phosphorylation.
SIGNOR-276432
Q12879
Q13627
0
phosphorylation
up-regulates quantity
0.397
DYRK1A enhances the surface expression of GluN1 and GluN2A receptors.|Mechanistically, the DYRK1A-dependent phosphorylation of GluN2A at Ser 1048 hinders the internalization of GluN1/GluN2A, causing an increase of surface GluN1/GluN2A in heterologous systems, as well as in primary cortical neurons.
SIGNOR-279327
Q03113
O43603
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-257296
O00712
P29322
1
transcriptional regulation
up-regulates quantity
0.2
For example, within the NFI targetome, we identified 6 collagen genes, 13 genes encoding potassium channel or glutamate receptor subunits and a range of factors related to axon guidance (e.g. Slit1, Robo1, Epha4, Epha5, Epha8)
SIGNOR-268903
P27986
P00533
2
binding
up-regulates
0.81
The egf-r coimmunoprecipitated with p85 alpha
SIGNOR-121959
Q9NS91
O76064
2
binding
up-regulates
0.415
Rnf8 depletion also significantly reduced the accumulation of rad18 to chromatin fraction after ir
SIGNOR-185593
P46531
O00303
0
deubiquitination
up-regulates
0.421
The activated form of notch needs to be deubiquitinated before being processed by the gamma-secretase activity and entering the nucleus, where it fulfills its transcriptional function. The enzyme accounting for this deubiquitinase activity is eif3f, known so far as a translation initiation factor.
SIGNOR-170158
P53041
P04049
1
dephosphorylation
down-regulates activity
0.462
Protein phosphatase 5 (PP5) was identified as an inactivator that associates with Raf-1 on growth factor stimulation and selectively dephosphorylates an essential activating site, Ser 338. The PP5-mediated dephosphorylation of Ser 338 inhibited Raf-1 activity and downstream signalling to MEK
SIGNOR-248537
Q96N67
Q6ZNJ1
2
binding
up-regulates activity
0.38
In summary, from 129 binding partners of Nbeal2 identified by mass spectrometry, we have confirmed the interaction of 3, Dock7, Sec16a, and Vac14, by different biochemical and cellular approaches|Given the significant reduction of Dock7 levels and its altered localization in Nbeal2−/− platelets, we postulated that this canonical signaling pathway may be disrupted and set out to test this using control and Nbeal2−/− platelets.
SIGNOR-261891
P09884
Q7L590
0
relocalization
up-regulates quantity by stabilization
0.862
Mcm10 is an essential eukaryotic protein required for the initiation and elongation phases of chromosomal replication. Specifically, Mcm10 is required for the association of several replication proteins, including DNA polymerase alpha (pol alpha), with chromatin.
SIGNOR-261271
P46940
P12931
0
phosphorylation
up-regulates activity
0.695
IQGAP1 was phosphorylated exclusively on Tyr-1510 under conditions with enhanced MET or c-Src signaling, including in human lung cancer cell lines. This phosphorylation was significantly reduced by chemical inhibitors of MET or c-Src or by siRNA-mediated knockdown of MET.
SIGNOR-277533
O43283
Q14258
1
phosphorylation
up-regulates quantity by stabilization
0.2
Mechanistically, MAP3K13 phosphorylates the E3 ubiquitin ligase TRIM25 at Ser12 to decrease its polyubiquitination and proteasomal degradation.
SIGNOR-277456
Q13315
Q92878
2
binding
up-regulates
0.813
One of the earliest events is recruitment and activation of the atm at the damaged dna sites through the mre11rad50nbs1 (mrn) sensor complex. . the mre11/rad50/nbs1 (mrn) complex maintains genomic stability by bridging dna ends and initiating dna damage signaling through activation of the atm kinase.
SIGNOR-175053
Q13153
Q99661
1
phosphorylation
down-regulates
0.385
Here we found that mcak is a cognate substrate of pak1 wherein pak1 phosphorylates mcak on serines 192 and 111 both in vivo and in vitro. Furthermore, we found that pak1 phosphorylation of mcak on serines 192 and 111 preferentially regulates its microtubule depolymerization activity and localization to centrosomes
SIGNOR-199084
P49137
Q9UPN4
1
phosphorylation
down-regulates quantity
0.291
We identify CEP131 as a major Centriolar satellites-associated substrate of p38-dependent, MK2-mediated phosphorylation on two defined residues and show that these modifications promote binding to 14-3-3 proteins, in turn leading to cytoplasmic sequestration of CEP131 and associated Centriolar satellites factors.|We therefore conclude that MK2 dependent phosphorylation of CEP131 at S47 and S78 and the ensuing binding of 14-3-3 proteins play an essential role in triggering stress induced remodelling of CS.
SIGNOR-278181
P98164
P08253
2
binding
up-regulates quantity
0.342
We show that megalin/LRP-2 acts as an endocytic receptor for proMMP-2:TIMP-2 complex. We found that RAP, an antagonist of the LDL receptor family18, competed with binding of proMMP-2:TIMP-2 complex onto rat BN16 epithelial cells.
SIGNOR-265255
Q93096
P30291
0
phosphorylation
down-regulates activity
0.2
In this study , we found that WEE1 phosphorylates PRL1 and promotes PRL1 degradation .|In this study, we demonstrated that WEE1 phosphorylates and inhibits PRL1 to regulate alternative splicing of CYCD1;1 and CYCD3;1 , which may represent a new cell cycle control mechanism.
SIGNOR-278434
P31749
O43524
1
phosphorylation
down-regulates activity
0.91
Akt-dependent phosphorylation of foxo3a (thr32, ser253, and ser315 for human foxo3) enhances foxo3a/14?3?3 Interaction and promotes foxo3a nuclear export to the cytoplasm, resulting in the repression of foxo3a transcriptional function
SIGNOR-252523
Q99623
Q16566
0
phosphorylation
down-regulates
0.338
Here we show that calcium/calmodulin-dependent kinase iv (camk iv) specifically binds to the c terminus of phb2 and phosphorylates phb2 at serine 91. Camk iv effectively decreased phb2-mediated repression of mef2 activity through phosphorylation
SIGNOR-174437
P29401
P31749
0
phosphorylation
up-regulates activity
0.282
Akt phosphorylates TKT on Thr382, markedly enhancing enzyme activity and increasing carbon flow through the nonoxidative PPP, thereby increasing purine synthesis.
SIGNOR-265101
Q12955
Q14576
0
post transcriptional regulation
down-regulates quantity
0.25
NElavl (composed of Elavl2, Elavl3, and Elavl4) proteins are the RNA-binding proteins that is specifically expressed in neurons, regulate the alternative splicing of target RNAs, and promote neuronal differentiation and maturation. Here, we found that the alternative splicing of AnkyrinG exon 34 was misregulated in the cerebella of Elavl3-/- mice. AnkyrinG is an essential factor for the formation of neuronal polarity and is required for normal neuronal functions.
SIGNOR-266861
P08138
P22694
0
phosphorylation
up-regulates
0.625
Pka phosphorylates the p75 receptor and regulates its localization to lipid rafts. activation of camp?PKA Is required for translocation of p75ntr to lipid rafts, and for biochemical and biological activities of p75ntr, such as inactivation of rho and the neurite outgrowth.
SIGNOR-99755
P46937
P35813
0
dephosphorylation
up-regulates activity
0.269
Although the authors show an in vitro kinase assay where PPM1A supposedly dephosphorylates YAP on Ser127, Fig. 4A lacks a positive control to ensure that PPM1A purified from cells is active.|The protein phosphatase PPM1A dephosphorylates and activates YAP to govern mammalian intestinal and liver regeneration.
SIGNOR-276984
P55040
P61981
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
Q8N448
P49757
1
polyubiquitination
down-regulates quantity by destabilization
0.605
Polyubiquitination of Human Numb by LNX2. The Zn-RING-Zn domain of LNX2 is a dimer and assumes a rigid elongated structure that undergoes autoubiquitination and undergoes N-terminal polyubiquitination. LNX2 can bind numb and induce its ubiquitination and subsequent proteasomal degradation
SIGNOR-272423
Q8IXH7
Q05086
0
ubiquitination
down-regulates quantity by destabilization
0.326
In this paper, we identify here trihydrophobin 1 (TH1), an integral subunit of the human negative transcription elongation factor (NELF) complex, as a novel E6-AP interaction protein and a target of E6-AP-mediated degradation. Overexpression of E6-AP results in degradation of TH1 in a dose-dependent manner, whereas knock-down of endogenous E6-AP elevates the TH1 protein level. 
SIGNOR-271404
Q96RR4
Q00535
0
phosphorylation
down-regulates
0.2
Cdk5 and gsk3 phosphorylate ser-129, ser-133, and ser-137. Mutation of ser-129, ser-133, and ser-137 increases autonomous activity with little change in ca2 /cam-dependent activity.
SIGNOR-198111
P30989
P25098
0
phosphorylation
up-regulates activity
0.2
Here we report the unique phosphorylation\nof NTSR1 by GRK2 and GRK5, which belong to the GRK2 and GRK4 subfamilies,\nrespectively.
SIGNOR-278280
P42771
Q8IXJ9
0
transcriptional regulation
up-regulates quantity by expression
0.3
Modeling ASXL1 mutation revealed impaired hematopoiesis caused by derepression of p16Ink4a through aberrant PRC1-mediated histone modification. These results indicated that loss of protein interaction between Asxl1 mutant and Bmi1 affected the activity of PRC1, and subsequent derepression of p16Ink4a by aberrant histone ubiquitination could induce cellular senescence, resulting in low-risk MDS-like phenotypes in Asxl1G643fs/+ mice.
SIGNOR-260119
P35222
P35790
0
phosphorylation
down-regulates activity
0.286
The data suggest that CKI phosphorylates and destabilizes the beta-catenin degradation complex, likely through the dissociation of PP2A, providing a mechanism by which CKI stabilizes beta-catenin and propagates the Wnt signal.
SIGNOR-279161
Q96EP0
Q9Y6K9
1
polyubiquitination
up-regulates activity
0.849
Involvement of Gln271 and Asp275 of NEMO in LUBAC-mediated linear polyubiquitination.vHOIP NZF1 also recognizes NEMO, and this recognition is involved in linear polyubiquitination of NEMO. Linear chains conjugated to NEMO are recognized by NEMO in trans on another IKK complex, thereby inducing multimerization of the IKK complex and trans autophosphorylation of IKK2.
SIGNOR-272052
P06400
Q00535
0
phosphorylation
down-regulates
0.336
Phosphorylation was observed 6 hours after p25 induction and was abolished in the presence of a cdk5 inhibitor, roscovitine, which does not inhibit the usual rb cyclin-d kinases cdk4 and cdk6. Furthermore, analyses of levels and subcellular localization of cdk-related cyclins did not reveal any change following cdk5 activation, arguing for a direct effect of cdk5 activity on rb protein. Rb phosphorylation was visualized using phosphorylation-dependent antibodies (p-rbser795 and p-rbser807/811).
SIGNOR-134468
Q8IZP0
P00519
2
binding
up-regulates
0.88
Our results are in agreement with previous report showing that abi-1, the putative mouse homologue of e3b1, is a abl binding protein
SIGNOR-45994
Q86XK2
P04637
1
neddylation
down-regulates
0.671
Fbxo11 promotes the neddylation of p53 and inhibits its transcriptional activity / we found that fbxo11 also neddylates p53 on two lysines, lys-320 and lys-321
SIGNOR-150669
Q96C90
Q05655
0
phosphorylation
up-regulates activity
0.2
Recombinant tagged PHI-1 was phosphorylated by protein kinase C at two sites, one a Ser and one a Thr; phosphorylation enhanced inhibitory potency 50-fold.
SIGNOR-265739
P61224
Q9H4E7
2
binding
up-regulates activity
0.2
Mechanistic studies revealed that SLAT interacts, through its PH domain, with a key component of inside-out signaling, namely the active form of the small GTPase Rap1 (which has two isoforms, Rap1A and Rap1B). This interaction has been further shown to facilitate the interdependent recruitment of Rap1 and SLAT to the T cell immunological synapse upon TCR engagement. Furthermore, a SLAT mutant lacking its PH domain drastically inhibited LFA-1 activation and CD4(+) T cell adhesion.
SIGNOR-253366
Q8WYL5
O94806
0
phosphorylation
down-regulates activity
0.286
Active PKD Isoforms Phosphorylate and Inactivate SSH1L|Here, we show that active PKD3 also mediates SSH1L phosphorylation at Ser-978 and binding to 14-3-3, further confirming the involvement of all three PKD isoforms in negatively regulating this phosphatase
SIGNOR-275938
Q9BUB5
O43597
1
phosphorylation
down-regulates
0.531
The spry2/nedd4 association involves the ww domains of nedd4 and requires phosphorylation of the mnk2 kinase sites, ser(112) and ser(121), on spry2. mnk2 silencing decreased spry2-nedd4 interactions and also augmented the ability of spry2 to inhibit fibroblast growth factor signaling. endogenous and overexpressed nedd4 polyubiquitinate spry2 via lys(48) on ubiquitin and decrease its stability.
SIGNOR-188889
Q92934
P28482
0
phosphorylation
down-regulates activity
0.461
The rapid phosphorylation of bad following il-3 connects a proximal survival signal with the bcl-2 family, modulating this checkpoint for apoptosis.phosphorylatedBAD is bound to 14-3-3 within the cytosol, while only nonphosphorylated BAD is heterodimerized with membrane-bound BCL-XL.
SIGNOR-44858
Q92934
P41743
0
phosphorylation
down-regulates
0.32
In-vitro kinase activity assay showed that pkc-_ directly phosphorylated bad at phospho specific residues, ser-112, ser-136 and ser-155 which in turn induced inactivation of bad and disruption of bad/bcl-xl dimer
SIGNOR-172894
Q9BZE0
P17612
0
phosphorylation
down-regulates activity
0.283
Protein kinase a (pka) and glycogen synthase kinase 3beta sequentially phosphorylate gli2 at multiple sites, identified by mutagenesis, thus resulting in a reduction of its transcriptional activity
SIGNOR-145131
Q9UQM7
Q9UBS5
1
phosphorylation
down-regulates
0.237
Nmda-dependent internalization of gabab receptors requires activation of ca2+/calmodulin-dependent protein kinase ii (camkii), which associates with gabab receptors in vivo and phosphorylates serine 867 (s867) in the intracellular c terminus of the gabab1 subunit.
SIGNOR-166846
Q00535
P53779
1
phosphorylation
down-regulates activity
0.345
Here, we show that cdk5 directly phosphorylates c-Jun N-terminal kinase 3 (JNK3) on Thr131 and inhibits its kinase activity, leading to reduced c-Jun phosphorylation.
SIGNOR-250668
P23396
P67775
0
dephosphorylation
down-regulates
0.427
We identified that pp2a interacts with wild-type rps3, but not with mutants (s6a/t221a) (fig. 8), and that it associates with the n-terminal region of rps3 (fig. 2). From our results presented here, we conclude that pp2a is involved in the dephosphorylation of phosphorylated rps3 by pkc, and that serine 6 on the n-terminal region of rps3 appears to mediate the pp2a recruitment.
SIGNOR-137963
P63092
P34995
2
binding
up-regulates activity
0.457
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 ‚â• -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 ‚â• -1.0 for defining true couplings. | The score associated to this interaction has a LogRAi ‚â• -1.0.
SIGNOR-256811
Q8N6T3
P84077
1
gtpase-activating protein
up-regulates activity
0.862
The ARFGAP molecule binds to switch 2 and helix α3 to orient ARF1 residues for catalysis, but it supplies neither arginine nor other amino acid side chains to the GTPase active site.
SIGNOR-261915
P06493
P17096
1
phosphorylation
down-regulates
0.384
Here, we found that hipk2 phosphorylates hmga1a at ser-35, thr-52, and thr-77, and hmga1b at thr-41 and thr-66. In addition, we demonstrated that cdc2, which is known to phosphorylate hmga1 proteins, could induce the phosphorylation of hmga1 proteins at the same ser/thr sites. we found that the hipk2-phosphorylated hmga1a reduced the binding affinity of hmga1a to human germ line promoter, and the drop in binding affinity induced by hipk2 phosphorylation was lower than that introduced by cdc2 phosphorylation.
SIGNOR-158604
Q93034
Q8WXH5
2
binding
up-regulates activity
0.493
SOCS7 promotes Dab1 polyubiquitylation and degradation. SOCS7-CRL5 complexes stimulate the ubiquitylation and turnover of Dab1. SOCS7, a CRL5 substrate adaptor protein, is also required for neocortical layering. SOCS7-CRL5 complexes stimulate the ubiquitylation and turnover of Dab1.
SIGNOR-272141
P01112
P21359
0
gtpase-activating protein
down-regulates activity
0.813
Nf1encodes neurofibromin, a protein with multiple functions including ras inactivation (ras gtpase-activating protein or rasgap) and adenylyl cyclase (ac) activation
SIGNOR-204357
P23760
Q9GZV5
2
binding
up-regulates
0.454
These results indicate that pax3 specifically interacts with taz both in vitro and in vivo.
SIGNOR-236879
Q01851
P03372
2
binding
up-regulates activity
0.552
The POU domain of Brn-3a and Brn-3b was shown to interact with the DNA-binding domain of the ER. Brn-3-ER interactions also affect transcriptional activity of an ERE-containing promoter, such that in estradiol-stimulated cells, Brn-3b strongly activated the promoter via the ERE, while Brn-3a had a mild inhibitory effect.
SIGNOR-241275
P36873
Q9UD71
2
binding
down-regulates activity
0.591
DARPP-32 (dopamine and cyclic AMP-regulated phospho-protein, relative molecular mass 32,000) is converted into an inhibitor of protein phosphatase 1 when it is phosphorylated by protein kinase A (PKA) at threonine 34.‚ 
SIGNOR-264958
P08575
Q86WV1
1
dephosphorylation
up-regulates activity
0.361
Mutational analysis demonstrated the pivotal role of Tyr-232 in SKAP55 in the association with CD45. In Jurkat cells, anti-CD3 antibody stimulation promoted SKAP55 tyrosine phosphorylation and translocation from the cytoplasm to the membrane. Overexpression of SKAP55 in these cells induced transcriptional activation of the IL-2 promoter, while mutant SKAP55-Y232F totally suppressed the promoter activity. Furthermore, overexpression of SKAP55-Y232F also caused the tyrosine hyperphosphorylation of Fyn with a decreased kinase activity. Thus, SKAP55 is an essential adapter to couple CD45 with the Src family kinases for dephosphorylation and, thus, positively regulates TCR signaling.
SIGNOR-248360
Q07812
Q9Y371
2
binding
up-regulates
0.329
Here, we provide evidence that bif-1 plays a regulatory role in apoptotic activation of not only bax but also bak and appears to be involved in suppression of tumorigenesis. while bif-1 did not directly interact with bak, it heterodimerized with bax on mitochondria in intact cells, and this interaction was enhanced by apoptosis induction and preceded the bax conformational change.
SIGNOR-141166
P45973
Q5XX13
2
binding
down-regulates quantity by destabilization
0.2
As expected, the SKP1 and CUL1 proteins, subunits of all F-box-containing E3 ligases, were also present in the immune complexes containing FBXO10 and BCL2. To test for FBXO10-induced ubiquitination of BCL2, 293T cells were transduced with retroviral vectors expressing Flag-tagged FBXO10, MYC-tagged BCL2, and HA-tagged ubiquitin, and cells were treated with the proteasome inhibitor PS-341 to enhance the detection of ubiquitinated proteins.Together, these data suggest that FBXO10 is a component of a ubiquitin ligase that can target BCL2 protein for degradation.
SIGNOR-271933
Q8NHY2
Q13085
1
ubiquitination
down-regulates quantity by destabilization
0.2
TRB3 appears to inhibit ACC activity by functioning as an adaptor for COP1.  Taken together, these results suggest that TRB3 may promote loss of fat by mediating the COP1-dependent ubiquitination and inactivation of ACC. Taking these results together, we propose that TRB3 may protect against diet-induced obesity by stimulating fatty acid oxidation in adipose during fasting through the COP1-mediated ubiquitination and degradation of ACC (Fig. 4D).
SIGNOR-271598
P19086
Q9GZQ6
2
binding
up-regulates activity
0.252
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-257103
P25490
P53350
0
phosphorylation
up-regulates
0.392
More recently, we identified and mapped multiple phosphorylation sites in yy1, including, threonine 39, serine 118, serine 247, threonine 348 and threonine 378. The first kinase proven to phosphorylate yy1 in vivo was plk1, which phosphorylates threonine 39 during g2/m stage of the cell cycle [25]. Ck2_ is another kinase identified as constitutively phosphorylating yy1 at serine 118. This modification protects yy1 cleavage by caspase 7 during apoptosis
SIGNOR-200087
Q07960
P60953
1
gtpase-activating protein
down-regulates activity
0.905
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-260459
Q13950
P28562
0
dephosphorylation
up-regulates activity
0.353
In a separate study, MKP-1 was shown to induce osteogenesis by dephosphorylating Ser125 on Runx2 isoform type II (37).|MKP-1 increases RUNX2 activity and downregulates MAPK, cyclin D1 in differentiated osteoblasts inducing growth arrest and mineralization.
SIGNOR-277143
O60266
P38405
2
binding
up-regulates activity
0.641
Subsequently, the Gaolf subunit activates the integral membrane protein adenylyl cyclase type III (AC3), leading to the conversion of adenosine triphosphate (ATP) into cyclic adenosine monophosphate (cAMP)
SIGNOR-278072
Q05655
P23396
1
phosphorylation
up-regulates activity
0.2
Here we show that PKCδ phosphorylates rpS3 resulting in its mobilization in the nucleus to repair damaged DNA
SIGNOR-260895
P49585
P27361
0
phosphorylation
down-regulates
0.46
Oxysterols inhibit phosphatidylcholine synthesis via erk docking and phosphorylation of ctp:phosphocholine cytidylyltransferase. Mutagenesis of ser315 within cctalpha was both required and sufficient to confer significant resistance to 22-hc/9-cis-ra inhibition of ptdcho synthesis.
SIGNOR-134841
P52630
Q7Z570
2
binding
up-regulates activity
0.2
Together these results indicate the formation of ZNF804A:STAT2 protein complex and its translocation from the cytoplasm into the nucleus upon IFN stimulation, suggesting that it may function as a signal transducer that activates IFN-mediated gene expression programs.
SIGNOR-269460
P19174
Q16288
2
binding
up-regulates
0.619
Unglycosylated trka core protein is phosphorylated even in the absence of ligand stimulation and displays constitutive kinase activity as well as constitutive interaction with the signaling molecules shc and plc-gamma.
SIGNOR-67404
Q86YC2
P38398
2
binding
up-regulates activity
0.851
The BRCA1-PALB2 interaction is required for homologous recombination repair.Here, we report that PALB2, the partner and localizer of BRCA2, binds directly to BRCA1, and serves as the molecular scaffold in the formation of the BRCA1-PALB2-BRCA2 complex.
SIGNOR-244487
P27361
Q15648
1
phosphorylation
up-regulates
0.263
Phosphorylation of transcriptional coactivator peroxisome proliferator-activated receptor (ppar)-binding protein (pbp). Stimulation of transcriptional regulation by mitogen-activated protein kinase
SIGNOR-93993
Q13158
P48729
0
phosphorylation
down-regulates activity
0.333
FADD is essential for death receptor (DR)-induced apoptosis.|Phosphorylation of FADD at serine 194 by CKIalpha regulates its nonapoptotic activities
SIGNOR-139307
O95551
Q16659
0
phosphorylation
up-regulates activity
0.377
ERK3 phosphorylates TDP2 and promotes its phosphodiesterase activity, thereby upregualting TDP2-mediated DNA damage response and desensitizing lung cancer cells to Top2 inhibitor-induced growth inhibition.|In the current study, we have found that ERK3, an atypical MAPK, phosphorylates TDP2 at S60 and regulates TDP2 's phosphodiesterase activity, thereby cooperatively protecting lung cancer cells against Top2 inhibitors induced DNA damage and growth inhibition.
SIGNOR-278245