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14
Q15759
O75582
1
phosphorylation
up-regulates
0.615
Mitogen- and stress-activated protein kinase-1 (msk1) is directly activated by mapk and sapk2/p38, and may mediate activation of crebactivated by phosphorylation at ser-360, thr-581 and thr-700 by mapk1/erk2, mapk3/erk1 and mapk14/p38-alpha
SIGNOR-59443
P04637
P53778
0
phosphorylation
up-regulates activity
0.474
Furthermore, upon activation by oncogenic ras, p38gamma stimulated the transcriptional activity of p53 by phosphorylating p53 at Ser(33), suggesting that the ability of p38gamma to mediate senescence is at least partly achieved through p53.
SIGNOR-280026
O15111
O14920
1
phosphorylation
up-regulates activity
0.67
Our data indicate that IKKα stimulates IKKβ kinase activity for the IκBα substrate. Finally, we demonstrate that IKKα can phosphorylate IKKβ in in vitro kinase assays.
SIGNOR-250772
Q99835
Q9UBI6
2
binding
up-regulates
0.2
As pka suppresses the activity of gli, smo might use the stimulation of pi3k by galfai and gbetagamma subu- nits to block pka in cells that have high levels of camp.
SIGNOR-152817
P01106
P50750
0
phosphorylation
down-regulates activity
0.54
CDK9 promotes phosphorylation of MYC on Ser 62 .
SIGNOR-279024
P05129
P06127
1
phosphorylation
up-regulates
0.341
Cd5 is a good pkc substrate. Phosphorylation of cd5 is necessary for cd5-mediated lipid second messenger generation.
SIGNOR-85183
P43405
Q9GZY6
1
phosphorylation
up-regulates activity
0.592
Our results indicated that human LAB was primarily phosphorylated on three membrane-distal tyrosines, Tyr(136), Tyr(193), and Tyr(233). Mutation of these three tyrosines abolished Grb2 binding and LAB function. Our data suggested that these tyrosines are the most important tyrosines for LAB function.The dramatic reduction in phosphorylation of the LAB Y233F mutant suggested that Tyr233 is a primary target of the Syk family kinases.
SIGNOR-273576
P49841
P04198
1
phosphorylation
down-regulates quantity by destabilization
0.33
Because GSK3\u03b2 phosphorylates Nmyc at T58, we assessed GSK3\u03b2 activation in Dex-treated MB cells.
SIGNOR-279722
P38405
O00254
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-256904
P06493
Q8NHV4
1
phosphorylation
up-regulates activity
0.585
Here we report that the function of Nedd1 is regulated by Cdk1 and Plk1. During mitosis, Nedd1 is firstly phosphorylated at T550 by Cdk1, which creates a binding site for the polo-box domain of Plk1. Then, Nedd1 is further phosphorylated by Plk1 at four sites: T382, S397, S637 and S426. The sequential phosphorylation of Nedd1 by Cdk1 and Plk1 promotes its interaction with gamma-tubulin for targeting the gammaTuRC to the centrosome and is important for spindle formation.
SIGNOR-272973
O00429
P00519
0
phosphorylation
up-regulates activity
0.26
In this study, we found that c-Abl phosphorylated Drp1 at tyrosine 266, 368 and 449 in vitro and in vivo, which augmented the GTPase activity of Drp1 and promoted Drp1-mediated mitochondrial fragmentation.
SIGNOR-277328
P04637
Q92630
0
phosphorylation
up-regulates
0.67
Here, we demonstrate that the dual-specificity tyrosine-phosphorylation-regulated kinase 2 (dyrk2) directly phosphorylates p53 at ser46. these findings indicate that dyrk2 regulates p53 to induce apoptosis in response to dna damage.
SIGNOR-153544
Q92847
Q9UBU3
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
Q14444
Q13283
2
binding
up-regulates activity
0.588
Caprin-1 and G3BP-1 were directly or indirectly associated in a stable complex. The Caprin-1/G3BP-1 complex occurs in cytoplasmic RNA granules
SIGNOR-260982
P11831
P78527
0
phosphorylation
up-regulates activity
0.406
 The carboxyl-terminal transcription activation domain was mapped within a 71-amino acid region that contains both DNA-PK phosphorylation sites. Amino acid substitutions that interfered with phosphorylation by DNA-PK at Ser-435/446 in GAL4-SRF fusion proteins were reduced in transactivation potency. From these data we suggest that DNA-PK phosphorylation may modulate SRF activity in vivo.
SIGNOR-248922
P27361
P10636-2
1
phosphorylation
down-regulates activity
0.501
We have studied the relationship between the phosphorylation oftau by several kinases (MARK, PKA, MAPK, GSK3) and its assembly into PHFs. By contrast, MARK and PKA phosphorylate several sites within the repeats (notably theKXGS motifs including Ser262, Ser324, and Ser356, plus Ser320); in addition PKA phosphorylates somesites in the flanking domains, notably Ser214. This type of phosphorylation strongly reduces tau’s affinityfor microtubules, and at the same time inhibits tau’s assembly into PHFs.
SIGNOR-275434
P18846
O75676
0
phosphorylation
up-regulates
0.615
Msk1 and msk2 directly phosphorilate and activate transcription factors such as creb1, atf1.
SIGNOR-116252
O15303
P63092
2
binding
up-regulates activity
0.34
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-264084
P0DP25
P29474
2
binding
up-regulates activity
0.565
Electrons flow from the C-terminal reductase domain of one NOS monomer to the N-terminal oxygenase domain of the other NOS monomer (Siddhanta et al., 1998). The primary mode of enzyme activation is the binding of calcium-bound calmodulin to the N-terminal CaM-binding domain. This facilitates a structure change and the flow of electrons from NADPH through the flavins to the oxygenase domain of the other eNOS monomer
SIGNOR-266339
Q53GL7
Q13283
1
post translational modification
up-regulates activity
0.2
Further, we pinpoint the core SG component, G3BP1, as a PARP10 substrate and find that PARP10 regulates SG assembly driven by both G3BP1 and its modeled mechanism. Intriguingly, while PARP10 only adds a single ADP-ribose unit to proteins, G3BP1 is PARylated, suggesting its potential role as a scaffold for protein recruitment. PARP10 knockdown alters the SG core composition, notably decreasing translation factor presence.
SIGNOR-273727
Q96GD4
Q53HL2
1
phosphorylation
up-regulates activity
0.82
AURKB directly phosphorylated CDCA8 at Ser(154), Ser(219), Ser(275), and Thr(278) and seemed to stabilize CDCA8 protein in cancer cells.|Phosphorylation and activation of cell division cycle associated 8 by aurora kinase B plays a significant role in human lung carcinogenesis.
SIGNOR-279506
Q8NB16
P30530
0
phosphorylation
up-regulates quantity by stabilization
0.2
TAM kinases phosphorylate MLKL to promote necroptosis. MLKL is then recruited to the plasma membrane, where TAM kinases phosphorylate MLKL at Tyr376 (Figure 5G, step 5), promoting its oligomerization and formation of membrane-rupturing pores that result in necrotic cell death (Figure 5G, step 6).
SIGNOR-274119
Q05901
O00468
2
binding
up-regulates activity
0.2
Treatment of muscle cells with neural agrin causes tyrosine phosphorylation of the AChR β subunit and induces AChR clustering by promoting anchoring of the receptor protein to postsynaptic cytoskeleton. Regulation of acetylcholine receptor clustering by the tumor suppressor APC. By showing a direct requirement for APC in AChR clustering, our present study suggests that the Wnt/β-catenin pathway may crosstalk with the agrin signaling cascade during the formation of mammalian neuromuscular junction.
SIGNOR-264260
P00533
Q13332
0
dephosphorylation
down-regulates activity
0.43
Similarly, Pestana et al. (89) have reported that overexpression of RPTPsigma in human A431 carcinoma cells partially inhibits EGFR activation, whereas antisense mediated suppression of RPTPsigma expression enhances EGFR activation, substrate phosphorylation, and signalling.|These data indicate that LAR and RPTPsigma may have a significant role in GPCR induced EGFR signalling.Whereas in A431 cells LAR and RPTPsigma may act to suppress the EGFR in response to GPCR activation, it is possible that the converse may also be true in other cell types.
SIGNOR-277145
Q8IVH8
Q13233
1
phosphorylation
up-regulates
0.453
With regard to at least mekk1, serine/threonine kinases such as nik,glkand hpk1 appear also to be important for regulation
SIGNOR-61814
P25116
P63096
2
binding
up-regulates
0.402
Upon proteolysis, the newly formed n terminus acts as a tethered ligand that activates the receptor and initiates signaling cascades through multiple g proteins (galfaq, galfai, and galfa12/13).
SIGNOR-196009
Q13829
Q13618
2
binding
up-regulates activity
0.461
BACURDs form ubiquitin ligase complexes, which selectively ubiquitinate RhoA, with Cul3. Our studies reveal a previously unknown mechanism for controlling RhoA degradation and regulating RhoA function in various biological contexts, which involves a Cul3/BACURD ubiquitin ligase complex.
SIGNOR-264232
Q15054
P17612
0
phosphorylation
down-regulates
0.2
In this study, we identified s458, located in the pcna-interacting protein (pip-box) motif of p68, as a phosphorylation site for pka. Phosphomimetic mutation of s458 resulted in a decrease in p68 affinity for pcna as well as the processivity of pol _.
SIGNOR-195203
Q02156
P17302
1
phosphorylation
down-regulates activity
0.44
Phosphorylation of connexin43 on serine368 by protein kinase C regulates gap junctional communication.|These data strongly suggest that PKC directly phosphorylates Cx43 on S368 in vivo, which results in a change in single channel behavior that contributes to a decrease in intercellular communication.
SIGNOR-144465
Q14114
P06241
0
phosphorylation
up-regulates quantity
0.635
Fyn phosphorylates ApoER2.|Together these data demonstrate that Fyn activity is necessary for its effects increasing ApoER2 levels.
SIGNOR-278197
P27361
O95997
1
phosphorylation
up-regulates
0.304
Pttg is phosphorylated in vitro on ser(162) by map kinase and this phosphorylation site plays an essential role in pttg transactivation function.
SIGNOR-79519
Q96GD4
Q9P2J3
2
binding
up-regulates activity
0.71
Aurora B Interacts with the Cul3 Complex during Mitosis and Is Ubiquitylated in a Cul3-Dependent Manner In Vivo and In Vitro. our results suggest that Cul3/KLHL9/KLHL13 activity is required to remove the chromosomal passenger protein Aurora B from mitotic chromosomes, and that Aurora B is ubiquitylated in vivo and in vitro in a KLHL9/13-dependent manner. We conclude that the Cul3/KLHL9/KLHL13 E3 ligase is an important cell-cycle regulator which, in addition to the anaphase-promoting complex (APC), coordinates mitotic progression and completion of cytokinesis.
SIGNOR-271658
P12931
P04637
1
phosphorylation
down-regulates quantity by destabilization
0.524
We recently found that ISGylation of the p53 tumor suppressor is an important novel mechanism to control its stability. Here we identified that Isg15-dependent regulation of p53 can be enhanced by different oncogenes. We further show that the Src-mediated phosphorylation of p53 on Tyr126 and Tyr220 has a positive effect on p53 ISGylation by enhancing Herc5 binding.
SIGNOR-276668
Q15796
Q13233
0
phosphorylation
up-regulates activity
0.474
As yet, the apparent discrepancy between these and above data is not clear, but obviously the type of cell under study and the cellular context may play an important role.In endothelial cells, Smad2 activity is stimulated by MEKK1, a component of the Stress Activated Protein Kinase and c-Jun N terminal kinase (SAPK and JNK) pathway.|Phosphorylation of Smad2 by MEKK1 increased its association with Smad4, its nuclear accumulation and its transcription induction activity .
SIGNOR-279064
P19474
Q13501
1
ubiquitination
down-regulates activity
0.404
TRIM21 directly ubiquitylates p62 at residue K7 to inhibit its oligomerization and sequestration function.|TRIM21 negatively regulates p62 mediated sequestration of Keap1 and antioxidant response.
SIGNOR-278602
P49116
Q86VZ6
2
binding
down-regulates
0.453
Tip27 interacts specifically with tak1 / tip27 functions as a tak1-selective repressor
SIGNOR-127900
Q9UKB1
Q9HAW4
1
ubiquitination
down-regulates
0.345
Claspin degradation was triggered by its interaction with, and ubiquitylation by, the scfbetatrcp ubiquitin ligase.
SIGNOR-148438
Q9NXA8
P11413
1
catalytic activity
up-regulates activity
0.278
Here, we report that SIRT5 desuccinylates and deglutarylates isocitrate dehydrogenase 2 (IDH2) and glucose-6-phosphate dehydrogenase (G6PD), respectively, and thus activates both NADPH-producing enzymes.
SIGNOR-261211
Q9NXV6
Q00987
0
ubiquitination
down-regulates
0.37
Carf interacts with hdm2 and is ubiquitinated and negatively regulated by hdm2 by proteasome-dependent degradation.
SIGNOR-160974
Q93098
O75581
2
binding
up-regulates
0.617
Wnt proteins bind to the frizzled receptors and lrp5/6 co-receptors, and through stabilizing the critical mediator betBeta-catenin, initiate a complex signaling cascade that plays an important role in regulating cell proliferation and differentiation.
SIGNOR-132027
P07947
P46937
1
phosphorylation
up-regulates activity
0.721
Yes directly phosphorylates YAP and TAZ, resulting in their increased nuclear localization and transcriptional activity.Analysis by mass spectrometry identified Tyr391 and Tyr407 as the two phosphorylation sites of YAP, whereas Tyr305 was the sole phosphorylated residue of TAZ (Fig. 5F and fig. S4, A to C).
SIGNOR-277653
O60566
O14757
0
phosphorylation
up-regulates activity
0.447
Nonetheless, in our experimental system a Chk1-dependent BubR1 phosphorylation was also observed after Noc treatment.|Possible requirement of Chk1 in U2OS cells to activate the mitotic spindle checkpoint proteins Mad2 and BubR1.
SIGNOR-280223
P04406
Q5XX13
0
polyubiquitination
up-regulates activity
0.2
Mechanistically, FBXW10 promotes GAPDH polyubiquitination and activation; VRK2-dependent phosphorylation of GAPDH Ser151 residue is critical for GAPDH ubiquitination and activation. 
SIGNOR-277841
P25963
Q14164
0
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
P16104
O76064
0
ubiquitination
up-regulates
0.2
Rnf8 can ubiquitylate histone h2a and h2ax,
SIGNOR-159309
P68363
Q8NG68
0
tyrosination
down-regulates
0.46
Tubulin tyrosine ligase (ttl) adds a c-terminal tyr to __tubulin as part of a tyrosination/detyrosination cycle present in most eukaryotic cells. / ttl inhibits spontaneous tubulin polymerization
SIGNOR-176915
P06241
P35222
1
phosphorylation
down-regulates activity
0.851
Interaction of beta-catenin with alpha-catenin is regulated by the phosphorylation of beta-catenin Tyr-142. This residue can be phosphorylated in vitro by Fer or Fyn tyrosine kinases.  Transfection of these kinases to epithelial cells disrupted the association between both catenins.
SIGNOR-251162
Q13485
P28482
0
phosphorylation
up-regulates
0.511
Phosphorylation of thr276 is shown to be important for tgf-?-Induced nuclear accumulation and, as a consequence, transcriptional activity of smad4. these results suggest that smad4 can be phosphorylated by erk2 at thr276.
SIGNOR-101660
P62826
O43592
2
binding
up-regulates activity
0.815
The first step in export appears to be the formation of a trimeric tRNA/exportin-t/RanGTP complex. tRNA and RanGTP bind to exportin-t in a highly cooperative manner: tRNA increases the affinity of exportin-t for RanGTP apparently 300-fold (Figure 5A); conversely, RanGTP has to increase the affinity of exportin-t for tRNA by the same factor. RanGTP appears to have at least two functions in this complex. First, it stabilizes the tRNA/exportin-t interaction (see Figure 4B). Second, exportin-t apparently has to bind RanGTP for rapid exit from the nucleus
SIGNOR-261392
Q969H0
Q96KS0
1
ubiquitination
down-regulates quantity by destabilization
0.349
Mechanistically, we further show that FBW7, an E3 ligase complex component that is frequently downregulated in TNBC, negatively regulates EglN2 protein stability.
SIGNOR-261997
P55210
Q13177
0
phosphorylation
down-regulates
0.351
Pak2 can bind with caspase-7 and phosphorylate caspase-7 at the ser-30, thr-173, and ser-239 sites. Functionally, the phosphorylation of caspase-7 decreases its activity, thereby inhibiting cellular apoptosis.
SIGNOR-173655
O43303
Q12798
2
binding
up-regulates activity
0.483
We report that CP110 interacts with two different Ca2+-binding proteins, calmodulin (CaM) and centrin, in vivo. our data demonstrate a functional role for CaM binding to CP110 and suggest that CP110 cooperates with CaM and centrin to regulate progression through cytokinesis.
SIGNOR-265966
P00519
Q92466
1
phosphorylation
down-regulates
0.458
C-abl might act as a negative regulator of uv-ddb by phosphorylating ddb2
SIGNOR-90446
O75444
P35452
2
binding
down-regulates activity
0.367
Hoxd12 and MHox, that interact with v-/c-Maf, using the phage display method. The Hox proteins also could associate with the other Maf protein family members, MafB, MafK, MafF, and MafG, but not with Jun and Fos. The Hox proteins negatively regulated the DNA binding, transactivation and cell-transforming abilities of Maf.
SIGNOR-221887
Q9UQ26
P20336
1
relocalization
up-regulates activity
0.762
N-terminal interactions of RIMs with RAB3 and MUNC13 regulate DCV fusion. Through N-terminal interactions, RIMs position MUNC13 and recruit DCVs via RAB3, which is located on the vesicle
SIGNOR-264377
P11802
Q06413
2
binding
down-regulates
0.283
In contrast to cdk2, cyclin d/cdk4 blocks myod activity through an as yet unclear mechanism that may involve direct binding. Cyclin d/cdk4 can also block the activity of myogenin and all mef2 isoforms.
SIGNOR-176518
P01111
P42338
2
binding
up-regulates
0.668
Grb2 binds and activates sos, which then activates ras, and this activates p110 independently of p85./it was also described that ras interacts with pi3k in a direct manner./lysine residue 227 is essential for the interaction of ras with pi3k
SIGNOR-175225
P51617
Q99836
2
binding
up-regulates activity
0.848
Interleukin-1 (il-1) stimulates the association of the il-1 receptor-associated protein kinase (irak) with the heterodimer of il-iri and il-iracp via the adapter protein myd88. Myd88 binds to both irak (il-1 receptor-associated kinase) and the heterocomplex (the signaling complex) of the two receptor chains and thereby mediates the association of irak with the receptor.
SIGNOR-67143
Q8IWL8
P00519
0
phosphorylation
up-regulates activity
0.2
STH interacts with tau and Abl, and Abl phosphorylates STH on its single tyrosine residue.
SIGNOR-279353
P15056
Q02750
1
phosphorylation
up-regulates activity
0.789
Activation of mek family kinases requires phosphorylation of two conserved ser/thr residueserine residues 218 and 222 of human mek1 are the primary sites for phosphorylation by c-raf.
SIGNOR-235475
P49841
Q13976
0
phosphorylation
down-regulates activity
0.26
Moreover, PrkG1 inhibits GSK3\u03b2 by binding and directly phosphorylating GSK3\u03b2 at its serine-9 residue (Zhao et al., xref ).|Moreover, PrkG1 inhibits GSK3beta by binding and directly phosphorylating GSK3beta at its serine 9 residue.
SIGNOR-280094
Q9BXM7
P99999
1
null
down-regulates quantity
0.382
There is a strong cyto-protective role of PINK1 in maintaining mitochondrial homeostasis via different mechanisms. Overexpression of wild-type PINK1 in SH-SY5Y neuroblastoma cells stabilizes respiring mitochondrial networks through various mechanisms that include maintaining mitochondrial membrane potential, reducing basal and neurotoxin-induced ROS, suppression of cytochrome c release, reversal of toxin-induced fission, and suppression of autophagy
SIGNOR-249704
P23443
P08151
1
phosphorylation
up-regulates
0.523
In this study, we found that an activated mtor/s6k1 pathway promotes gli1 transcriptional activity and oncogenic function through s6k1-mediated gli1 phosphorylation at ser84, which releases gli1 from its endogenous inhibitor, sufu.
SIGNOR-196756
Q13188
P31749
0
phosphorylation
down-regulates
0.356
We determined that mst2 phosphorylation by akt limits mst2 activity in two ways: first, by blocking its binding to rassf1a and by promoting its association into the raf-1 inhibitory complex, and second, by preventing homodimerization of mst2, which is needed for its activation. we identified t117 and t384 as akt phosphorylation sites in mst2.
SIGNOR-163533
Q9Y6E7
P15336
0
transcriptional regulation
down-regulates quantity by repression
0.2
Our data suggest that mTORC1 promotes the binding of the E3 ligase, βTrCP, to CREB2 (Figure 4D), promoting CREB2 degradation by the proteasome (Figure 4E). Here, we show that mTORC1 promotes glutamine anaplerosis by activating glutamate dehydrogenase (GDH). This regulation requires transcriptional repression of SIRT4, the mitochondrial-localized sirtuin that inhibits GDH. Mechanistically, mTORC1 represses SIRT4 by promoting the proteasome-mediated destabilization of cAMP-responsive element binding 2 (CREB2).
SIGNOR-267831
P28482
P41182
1
phosphorylation
down-regulates
0.489
Here we show that antigen receptor activation leads to bcl-6 phosphorylation by mitogen-activated protein kinase (mapk). Phosphorylation, in turn, targets bcl-6 for rapid degradation by the ubiquitin/proteasome pathway.
SIGNOR-58481
O15055
P49674
0
phosphorylation
down-regulates quantity by destabilization
0.902
Priming-independent clusters located in the C-terminal portion of PER2’s PAS domains are targeted by CK1ε/δ and are required for ubiquitin ligase–mediated degradation of PER2
SIGNOR-277419
Q7Z6J0
P45983
2
binding
up-regulates
0.371
Posh activates jnk1 in cos-1 cells.
SIGNOR-55759
Q9HC98
Q13200
1
phosphorylation
up-regulates activity
0.2
Seven of these kinases (PIM1/2/3, MAP4K1/2, PKA, and NEK6) directly and robustly phosphorylated recombinant GST-Rpn1 at S361 in vitro (Fig. 3D and SI Appendix, Fig. S3 A and B). 
SIGNOR-273894
Q06187
Q08881
2
phosphorylation
up-regulates
0.497
Tec family protein tyrosine kinases (tfks) play a central role in hematopoietic cellular signaling. Initial activation takes place through specific tyrosine phosphorylation situated in the activation loop. Further activation occurs within the sh3 domain via a transphosphorylation mechanismthe major phosphorylation sites were identified as conserved tyrosines, for itk y180
SIGNOR-98036
Q16513
O15530
0
phosphorylation
up-regulates
0.705
It is shown that activation in vitro and in vivo involves the activation loop phosphorylation of prk1/2 by 3-phosphoinositide-dependent protein kinase-1 (pdk1) /pdk1 phosphorylates the prks at their conserved activation loop threonines (thr-774 and thr-816 for prk1 and prk2, respectively)
SIGNOR-76710
P37231
P46934
0
ubiquitination
up-regulates activity
0.386
First, NEDD4 interacts with and ubiquitinates PPARgamma.|NEDD4 increases PPARgamma stability through the inhibition of its proteasomal degradation.
SIGNOR-278540
Q13153
P49593
0
dephosphorylation
down-regulates activity
0.39
The p21-activated kinase PAK is negatively regulated by POPX1 and POPX2, a pair of serine/threonine phosphatases of the PP2C family|POPX Can Dephosphorylate and Downregulate PAK| To confirm that POPX2 acts on αPAK phospho-Thr422, a key regulator of activity in the kinase activation loop [9], we used phospho-specific antibodies against αPAK P-Thr422 (Figure 3B, lower panel), which proved to be an excellent substrate for POPX2. Similarly, complete loss of αPAK P-Ser57 with 0.2 μg POPX2 contrasts with the slight loss observed with 1.5 μg PP1. On the basis of these results, we suggest PAK is a substrate of POPX.
SIGNOR-248530
Q9UHD2
O95865
1
phosphorylation
down-regulates activity
0.2
TANK-binding kinase 1 (TBK1), a kinase downstream of MAVS, inhibited DDAH2 by phosphorylating DDAH2 at multiple sites. |The T203D, T211D, S245D, and S253D mutations significantly reduced the inhibitory effect of DDAH2 on RLR signaling, suggesting that phosphorylation of these residues was critical for DDAH2 to inhibit activation o
SIGNOR-275648
O14757
P06493
0
phosphorylation
up-regulates
0.411
Chk1 itself is also subject to cdk-mediated phosphorylation at serines 286 and 301 (s286 and 301). We show that chk1 s301 phosphorylation increases as cells progress through s and g2 and that both cdk1 and cdk2 are likely to contribute to this modification in vivo. We also find that substitution of s286 and s301 with non-phosphorylatable alanine residues strongly attenuates dna damage-induced chk1 activation and g2 checkpoint proficiency
SIGNOR-175071
Q9UBF6
P67870
0
phosphorylation
up-regulates activity
0.329
In the present study, we show the evidence that CKBBP1 is phosphorylated on threonine residue at position 10 by CKII in vitro and in vivo. Most importantly, disruption of this phosphorylation in CKBBP1 results in accumulation of IκBα and p27Kip1 in HeLa cells and inhibits cell proliferation that appears to be linked to defects in G1/S transition.
SIGNOR-251081
P55211
P06493
0
phosphorylation
down-regulates
0.429
Here, we show that the apoptotic initiator protease caspase-9 is regulated during the cell cycle through periodic phosphorylation at an inhibitory site, thr125. This site is phosphorylated by cdk1/cyclin b1 during mitosis and in response to microtubule poisons that arrest cells at this stage of the cell cycle.
SIGNOR-141621
P35968
P35790
0
phosphorylation
down-regulates quantity by destabilization
0.249
Here, we show for the first time a possible mechanism by which CKI dependent phosphorylation of VEGFR2 at specific sites in its C-terminal tail triggers SCF beta-TRCP -mediated VEGFR2 ubiquitination and destruction.
SIGNOR-279029
P29350
P35968
1
dephosphorylation
down-regulates activity
0.668
Src homology 2 (SH2) domain containing protein tyrosine phosphatase-1 (SHP-1) dephosphorylates VEGF Receptor-2 and attenuates endothelial DNA synthesis, but not migration|Knockdown of SHP-1 by siRNA or inhibition of c-Src by an inhibitor, results in augmented DNA synthesis perhaps due to increased phosphorylation of at least three tyrosine residues of KDR 996, 1059 and 1175
SIGNOR-248474
Q12809
Q96PU5
0
ubiquitination
down-regulates quantity by destabilization
0.399
As quantified in Fig. 5 B, only Nedd4-2 significantly increased the basal ubiquitylation of hERG1, while Nedd4-2-C801S and the other ubiquitin ligases had no effect.|The major findings of this study are as follows : 1) hERG1 interacts via its PY motif with the ubiquitin ligase Nedd4-2, 2) this interaction promotes the down-regulation of the functional form of the channel at the plasma membrane through Nedd4-2 ubiquitylation of the channel, and 3) I hERG1 is strongly decreased by Nedd4-2 catalytic dependent activity.The hERG1 PY motif is a highly conserved sequence across animal species lines, highlighting its crucial role in the regulation of the hERG1 channel at the cell surface.
SIGNOR-278771
P21452
P08754
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-256879
Q92890
Q8TAT6
2
binding
up-regulates activity
0.2
These findings ascribe specific functions to each of the components of the VCP-UFD1L-NPL4 complex in Vpu-mediated CD4 degradation: VCP energizes the process through ATP binding and hydrolysis, UFD1L binds ubiquitinated CD4 through recognition of K48 Ub chains, and NPL4 stabilizes UFD1L. VCP is thus likely to provide the energy required for extraction of CD4 from membranes.
SIGNOR-252422
P23508
Q13535
0
phosphorylation
up-regulates activity
0.2
MCC is phosphorylated at the ATM/ATR consensus sites Ser118 and Ser120.  Finally, mutation of S118/120 to alanine did not affect MCC nuclear shuttling following UV but did impair MCC G2/M checkpoint activity.
SIGNOR-273514
Q04759
O15530
0
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
P25090
P08754
2
binding
up-regulates activity
0.435
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-256745
P63092
P30550
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 ‚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-256774
Q14012
Q8N5S9
0
phosphorylation
up-regulates activity
0.414
Human calcium-calmodulin dependent protein kinase I: cDNA cloning, domain structure and activation by phosphorylation at threonine-177 by calcium-calmodulin dependent protein kinase I kinase.
SIGNOR-250717
P84243
P49336
0
phosphorylation
down-regulates activity
0.2
However, within T/G-Mediator, cdk8 phosphorylates serine-10 on histone H3, which in turn stimulates H3K14 acetylation by GCN5L within the complex. Tandem phosphoacetylation of H3 correlates with transcriptional activation, and ChIP assays demonstrate co-occupancy of T/G-Mediator components at several activated genes in vivo.
SIGNOR-273173
O00141
Q96J92
1
phosphorylation
up-regulates activity
0.415
In addition, we identified a novel SGK1 phosphorylation site (S1201) in WNK4, and phosphorylation at this site is reduced by Ca(2+)/CaM.
SIGNOR-276421
P98177
P11233
0
phosphorylation
up-regulates activity
0.2
We conclude that Ral-mediated phosphorylation of threonines 447 and 451 is required for proper activity of AFX-WT.
SIGNOR-249665
P67775
Q9Y243
1
dephosphorylation
down-regulates activity
0.738
Protein phosphatase 2A negatively regulates insulin's metabolic signaling pathway by inhibiting Akt (protein kinase B) activity in 3T3-L1 adipocytes
SIGNOR-248654
P42574
P49137
0
phosphorylation
up-regulates activity
0.311
MK2 Phosphorylates Caspase-3, Facilitates Nuclear Translocation of Caspase 3, and Regulates Apoptosis.|Over-expression of MK2 led to an increase in nuclear caspase-3 activity.
SIGNOR-278960
Q99836
P14778
2
binding
up-regulates activity
0.945
Interleukin-1 (il-1) stimulates the association of the il-1 receptor-associated protein kinase (irak) with the heterodimer of il-iri and il-iracp via the adapter protein myd88.
SIGNOR-67140
Q99835
P63211
2
binding
up-regulates
0.2
Consistent with its predicted topology, smo couples to a specific family of inhibitory g protein (gis) to regulate hh signaling.
SIGNOR-148601
Q13433
P43403
0
phosphorylation
up-regulates activity
0.2
To summarize, upon TCR triggering Zap70 activates Zip6, which is localized to the IS, through phosphorylation of tyrosine residues likely located in the long cytoplasmic loop.|Zip6 Is Phosphorylated by Zap70 in Response to TCR Stimulation.
SIGNOR-280165
Q8N165
Q05D32
0
dephosphorylation
up-regulates quantity by stabilization
0.356
 We found that peptides corresponding to phosphoserines 194 and 216 of PDIK1L (S385 and S413 of STK35) were efficiently dephosphorylated by SCP4, whereas no activity was detected for the other two phosphopeptides (Figure 6D).
SIGNOR-273773
Q8TEW6
P07949
2
binding
up-regulates
0.576
We identified two new family members, dok-4 and dok-5, that can directly associate with y1062 of c-ret dok-4 and dok-5 enhance c-ret-dependent activation of mitogen-activated protein kinase
SIGNOR-109513
Q9BX84
P63244
2
binding
down-regulates activity
0.2
We identified RACK1 as the first TRPM6-associated protein and demonstrated that RACK1 inhibits TRPM6 channel activity depending on the phosphorylation state T1851 in the α-kinase domain.
SIGNOR-260921
P60953
Q96P48
0
gtpase-activating protein
down-regulates activity
0.531
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-260452
P19086
Q9HC97
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-257112