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P40763
Q15300
0
phosphorylation
up-regulates activity
0.2
In addition, RET/PTC-mediated cellular transformation and proliferation of transformed cells require tyrosine 705 phosphorylation of STAT3 in NIH3T3 cells. We conclude that STAT3 activation by the RET/PTC tyrosine kinase is one of the critical signaling pathways for the regulation of specific genes, such as cyclin D1, vascular endothelial growth factor, and intercellular adhesion molecule 1, and for cellular transformation.
SIGNOR-260917
Q3MII6
O95166
2
binding
up-regulates
0.604
In this study, we report evidence demonstrating that oatl1, a putative rab guanosine triphosphatase-activating protein (gap), is a novel binding partner of atg8 homologues in mammalian cells. Oatl1 is recruited to isolation membranes and autophagosomes through direct interaction with atg8 homologues and is involved in the fusion between autophagosomes and lysosomes through its gap activity.
SIGNOR-172536
P13497
P02452
1
cleavage
up-regulates activity
0.681
BMP-1myc Expressed in COS-7 Cells Exhibits Procollagen C-proteinase Activity. Bone morphogenetic protein (BMP)-1, which belongs to the tolloid subgroup of astacin-like zinc metalloproteinases, cleaves the C-propeptides of procollagen at the physiologic site and is, therefore, a procollagen C-proteinase (PCP). Cleavage occurs between a specific alanine or glycine residue (depending on the procollagen chain) and an invariant aspartic acid residue in each of the three chains of procollagen.
SIGNOR-256342
O15530
P36507
1
phosphorylation
up-regulates
0.256
The identified pdk1 phosphorylation sites in mek1 and mek2 are ser222 and ser226, respectively, and are known to be essential for full activation.
SIGNOR-125176
Q99750
P15173
2
binding
down-regulates activity
0.374
We demonstrate that I-mf inhibits the transactivation activity of the MyoD family and represses myogenesis. I-mf associates with MyoD family members and retains them in the cytoplasm by masking their nuclear localization signals.
SIGNOR-240493
Q9BQ95
Q7Z434
2
binding
up-regulates activity
0.428
ECSIT interacts with IPS-1|ECSIT enhances IPS-1-mediated IFN-Beta promoter activation
SIGNOR-260371
P04150
P42229
2
binding
up-regulates
0.53
We show here that the glucocorticoid receptor can act as a transcriptional co-activator for stat5 and enhance stat5-dependent transcription. Stat5 forms a complex with the gluco-corticoid receptor which binds to dna independently of the gre. This complex formation between stat5 and the glucocorticoid receptor diminishes the glucocorticoid response of a gre-con-taining promoter.
SIGNOR-44376
P01116
Q8N9B8
0
guanine nucleotide exchange factor
up-regulates
0.427
Gefs catalyse the transition from gdp-bound, inactive ras to gtp-bound, active ras.
SIGNOR-183826
Q05397
Q9UQM7
0
phosphorylation
up-regulates
0.272
Furthermore, activated camkii directly phosphorylated the recombinant cooh-terminal region of fak at a residue equivalent to ser-843.
SIGNOR-135631
P42684
P09619
2
phosphorylation
up-regulates activity
0.303
C-Abl phosphorylates three tyrosine residues on PDGFR-beta (Y686, Y934, Y970), while Arg only phosphorylatesY686. Y686 and Y934 reside in PDGFR-beta catalytic domains, while Y970 is in the C-terminal tail. Using site-directed mutagenesis, we show that Abl-dependent phosphorylation of PDGFR-beta activates PDGFR-beta activity, in vitro, but serves to downregulate PDGFR-mediated chemotaxis. 
SIGNOR-276140
P35228
P42224
0
transcriptional regulation
up-regulates quantity by expression
0.428
STAT1 binds as a homodimer to cis elements known as gammaactivated sequences in the promoters of the genes encoding NOS2, the MHC class II transactivator (CIITA) and IL-12, among others.
SIGNOR-249497
P17252
Q05682
1
phosphorylation
down-regulates
0.357
Phosphorylation of both intact caldesmon and of its c-terminal fragment (658c), containing residues 658-756, significantly decreased their ability to inhibit acto-heavy meromyosin atpase.
SIGNOR-36792
P45983
Q00613
1
phosphorylation
down-regulates activity
0.497
JNK is activated by heat shock and phosphorylates HSF-1 on serine 363. JNK Phosphorylation of HSF-1 Leads to Reduction in Its Transcriptional Activity
SIGNOR-250119
P19086
Q15077
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-257189
P49768
Q969H0
2
binding
down-regulates quantity by destabilization
0.493
SEL-10 interacts with presenilin 1, facilitates its ubiquitination, and alters A-beta peptide production SEL-10 protein is a homologue of yeast Cdc4, a member of the SCF (Skp1-Cdc53/CUL1-F-box protein) E2-E3 ubiquitin ligase family. In this study, we show that human SEL-10 interacts with PS1 and enhances PS1 ubiquitination, thus altering cellular levels of unprocessed PS1 and its N- and C-terminal fragments. These observations suggest that SEL-10 mediated ubiquitination of PS1-CTF and PS1-NTF leads to their degradation.
SIGNOR-272600
Q8WZ60
P24941
1
polyubiquitination
down-regulates quantity by destabilization
0.2
We confirmed the formation of ubiquitin and CDK2 by different systems and further identified the E3 ligase KLHL6 as a mediator of the ubiquitination and degradation of CDK2. 
SIGNOR-272310
P29322
P29322
2
phosphorylation
up-regulates activity
0.2
Tyr-615 and Tyr-838 are major autophosphorylation sites of the EphA8 receptor. phosphorylation of Tyr-615 is critical for determining the association with Fyn whereas the integrity of Tyr-838 phosphorylation is required for efficient phosphorylation at Tyr-615 as well as other major sites.
SIGNOR-251121
P10827
Q15643
2
binding
up-regulates
0.387
Trip230 binds to rb independently of thyroid hormone while it forms a complex with tr in a thyroid hormone-dependent manner. Ectopic expression of the protein trip230 in cells, but not a mutant form that does not bind to tr, enhances specifically tr-dependent transcriptional activity.
SIGNOR-50348
Q9NQX3
P49841
0
phosphorylation
down-regulates
0.283
Identification of gsk3_ as the kinase targeting ser-270 /phosphorylation at ser-270 promotes gephyrin processing by calpain
SIGNOR-200957
P16234
P46108
2
binding
up-regulates
0.647
Crk could bind to both pdgf alpha- and beta-receptors in vivo.
SIGNOR-75881
P46937
P62136
0
dephosphorylation
up-regulates activity
0.668
In the present study, we demonstrate that PP1A (catalytic subunit of protein phosphatase-1) interacts with and dephosphorylates YAP2 in vitro and in vivo, and PP1A-mediated dephosphorylation induces the nuclear accumulation and transcriptional activation of YAP2.|PP1A dephosphorylates endogenous YAP2 at serine 127.
SIGNOR-276999
P24385
Q9Y463
0
phosphorylation
down-regulates
0.41
Further, we found that not only gsk-3beta but also dyrk1b modulates cyclin d1 subcellular localization by the phosphorylation of thr(288). These results suggest that dif-3 induces degradation of cyclin d1 through the gsk-3beta- and dyrk1b-mediated threonine phosphorylation in hela cells
SIGNOR-150126
P10070
Q9UMX1
0
relocalization
down-regulates activity
0.909
We demonstrate here that Su(fu) prevents the nuclear accumulation of Gli1 and Gli2 through multiple mechanisms
SIGNOR-129065
P10071
O60481
2
binding
up-regulates
0.374
Zic3 functions as a transcriptional coactivator of gli3 when it physically associates with gli3
SIGNOR-157637
Q9UBF6
Q8TB45
1
ubiquitination
down-regulates activity
0.299
SAG (Sensitive to Apoptosis Gene), also known as RBX2 (RING box protein 2), ROC2 (Regulator of Cullins 2), or RNF7 (RING Finger Protein 7), was originally cloned in our laboratory as a redox inducible antioxidant protein and later characterized as the second member of the RBX/ROC RING component of the SCF (SKP1-CUL-F-box Proteins) E3 ubiquitin ligase.  by forming a complex with other components of the SCF E3 ligase, SAG promotes ubiquitination and degradation of a number of protein substrates, including c-JUN, DEPTOR, HIF-1α, IκBα, NF1, NOXA, p27, and procaspase-3, thus regulating various signaling pathways and biological processes.
SIGNOR-271449
P00734
P00451
1
cleavage
up-regulates activity
0.755
Activation of factor VIII by thrombin occurs via limited proteolysis at R372, R740, and R1689.
SIGNOR-263640
Q96GX5
P06493
0
phosphorylation
up-regulates activity
0.513
We propose a model in which the initiating event for Gwl activation is phosphorylation by MPF of the proline-directed sites T193 and T206 in the presumptive activation loop
SIGNOR-249653
Q08881
P51813
1
phosphorylation
up-regulates activity
0.334
Itk phosphorylated Bmx-SH3 to a low extent. pY positions correspond to the residues Y215 and Y223 in Bmx. 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.
SIGNOR-251331
P61244
P68400
0
phosphorylation
down-regulates
0.361
Here, we have mapped the nh2-terminal in vivo phosphorylation sites of max to ser2 and ser11[...]
SIGNOR-35772
P45983
Q92730
2
binding
up-regulates
0.321
In the non-canonical wnt pathway, frizzled uses galfaq or galfai and gbetagamma dimers to activate phospholipase c (plc), resulting in protein kinase c (pkc) activation and calcium mobilization that regulates the transcription factor nfat, and frizzled also signals through the small gtpases rho and rac to c-jun n-terminal kinase (jnk), which activates the ap1 transcription factor
SIGNOR-152811
P06493
P18858
1
phosphorylation
up-regulates activity
0.364
We show that three residues (ser51, ser76, and ser91), which are part of cyclin-dependent kinase sites, are phosphorylated in a cell cycle-dependent manner.
SIGNOR-103242
Q13422
Q06187
0
phosphorylation
up-regulates activity
0.432
We demonstrate that BTK phosphorylates Ikaros at unique phosphorylation sites S214 and S215 in the close vicinity of its zinc finger 4 (ZF4) within the DNA binding domain, thereby augmenting its nuclear localization and sequence-specific DNA binding activity.
SIGNOR-279442
P21291
P17676
0
transcriptional regulation
up-regulates quantity by expression
0.2
We conclude that c-Rel regulates CRP expression without the requirement of binding to a kappaB site, and binds directly to C/EBPbeta to facilitate the binding of C/EBPbeta to the CRP promoter
SIGNOR-254049
Q02078
Q9UQL6
2
binding
down-regulates
0.706
The histone deacetylase hdac-5, upon dephosphorylation and translocation to the nucleus, directly inactivates mef2, preventing myogenesis.
SIGNOR-84023
Q06609
Q86YC2
2
binding
up-regulates
0.753
We propose that both palb2 chromatin association and its oligomerization serve to secure the brca2 x rad51 repair machinery at the sites of dna damage.
SIGNOR-185656
Q9UQF2
P46531
2
binding
down-regulates
0.266
Here, we show that jip1 suppresses notch1 activity. Jip1 was found to physically associate with either intracellular domain of notch1 or rbp-jk and interfere with the interaction between them.
SIGNOR-165710
Q13233
O14733
1
phosphorylation
up-regulates
0.723
Here we show that jnkk2, a novel member of the map kinase kinase family, was phosphorylated and activated by mekk1
SIGNOR-51207
P31749
P04792
1
phosphorylation
down-regulates
0.66
First, the akt1, akt2, and akt3 isoforms can bind directly to hsp27 and can be found in a complex with p38 mapk, mk2, and hsp27 [98_100]. Second, rane and colleagues showed that akt could phosphorylate hsp27 at ser-82, but not ser-15 or ser-78, in vitro, while co-expression of an active akt mutant and hsp27 in hek cells resulted in hsp27 phosphorylation at the same residue.
SIGNOR-252526
Q00653
Q99576
2
binding
down-regulates activity
0.327
GILZ inhibits NF-kappaB nuclear translocation and DNA binding due to a direct protein-to-protein interaction of GILZ with the NF-kappaB subunits.
SIGNOR-253298
P23409
Q02078
0
transcriptional regulation
up-regulates quantity by expression
0.589
Myogenin and MEF2 function synergistically to activate the MRF4 promoter during myogenesis.
SIGNOR-238709
Q02750
P04049
2
phosphorylation
up-regulates activity
0.749
In addition, though MEK-1 was able to induce C-Raf phosphorylation at the S338 site, which was shown to play a role in C-Raf activation by certain growth factors [ xref ], MEK-1 was able to bind and activate the S338/339A C-Raf mutant, suggesting that the MEK-1-induced C-Raf activation does not require phosphorylation at these sites ( xref , lanes 4, 5, left panel and lanes 6\u20139, right panel).|MEK-1-induced C-Raf activation is Ras independent.
SIGNOR-279627
Q13541
Q05655
0
phosphorylation
down-regulates activity
0.2
As shown for serum, phosphorylation of 4E-BP1 by PKCdelta inhibits the interaction between 4E-BP1 and eIF4E and stimulates cap-dependent translation.|Here we demonstrate that protein kinase Cdelta (PKCdelta) associates with RAFT1 and that PKCdelta is required for the phosphorylation and inactivation of 4E-BP1.
SIGNOR-279100
P36871
Q16512
0
phosphorylation
up-regulates
0.2
Pak1-mediated phosphorylation of pgm selectively on threonine 466 significantly increased pgm enzymatic activity
SIGNOR-128722
P04637
Q96S44
0
phosphorylation
up-regulates
0.76
The intrinsic transcriptional activity of p53 was up-regulated by a transient transfection of prpk to cos-7 cells. Prpk was shown to bind to p53 and to phosphorylate p53 at ser-15.
SIGNOR-157471
Q05397
P23634-6
1
phosphorylation
up-regulates activity
0.2
Results of co-immunoprecipitation, treatment with tyrosine kinase inhibitors and integrin inhibition experiments suggest that FAK is responsible for PMCA4b tyrosine phosphorylation during platelet activation. equence analysis indicates that Y(1176) is a likely substrate for focal adhesion kinase (FAK), while Y(1122) is not located in a tyrosine phosphorylation motif.
SIGNOR-263194
Q9NY12
O14746
2
binding
up-regulates activity
0.445
A complex of four proteins (GAR1, NHP2, NOP10, and the putative pseudouridine synthase dyskerin) associates with snoRNAs to form small nucleolar ribonucleoprotein particles (snoRNPs), and the binding of this complex to the H/ACA domain of TERC may have a role in the biogenesis of the telomerase RNP
SIGNOR-263333
P35226
P16104
1
ubiquitination
up-regulates activity
0.2
In this process, BMI1 ubiquitinates histone H2A and \u03b3H2AX, thereby facilitating the repair of double-stranded DNA breaks through stimulating homologous recombination and non-homologous end joining.
SIGNOR-278744
P20742
P14780
2
binding
down-regulates activity
0.349
Both PZP and a2M collagenase complexes incubated with gelatin demonstrated a significant inhibition of the catalytic activity| MMP-2 and MMP-9 cause a significant degradation of these bands and the background, a degradation which is prevented by both a2M and PZP.
SIGNOR-261802
Q9P286
O43426
1
phosphorylation
up-regulates activity
0.2
We identified two novel Pak5 substrates, Pacsin1 and Synaptojanin1, proteins that directly interact with one another to regulate synaptic vesicle endocytosis and recycling. Pacsin1 and Synaptojanin1 were phosphorylated by Pak5 and the other group II Paks in vitro, and Pak5 phosphorylation promoted Pacsin1-Synaptojanin1 binding both in vitro and in vivo.
SIGNOR-263026
Q06187
P42680
2
phosphorylation
up-regulates
0.496
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 mechanism. Here, we could confirm that y223 is the only site in the btk-sh3 domain being detectably phosphorylated
SIGNOR-98086
Q8NBJ5
Q15848
1
palmitoylation
up-regulates activity
0.2
We conclude that GLT25D1 regulates HMW adiponectin secretion and lipid accumulation, consistent with changes in mice after high-fat feeding. These results suggest a novel function of GLT25D1 leading to decreased HMW adiponectin secretion in early obesity.
SIGNOR-261149
Q05655
Q9H6E5
1
phosphorylation
up-regulates activity
0.2
PKCdelta associates with and directly phosphorylates Star-PAP.
SIGNOR-279385
P09086
Q16633
2
binding
up-regulates
0.562
We have shown previously that both octamer binding transcription factors, namely the ubiquitous oct-1 and the b cell-specific oct-2a protein, can be enhanced in transcriptional activity by their association with the b cell-specific coactivator protein bob1, also calledobf-1or oca-b.
SIGNOR-42278
P08047
P14210
1
transcriptional regulation
up-regulates quantity by expression
0.2
Furthermore, in transient cotransfection assays, overexpression of Sp1 and/or Sp3 stimulated HGF promoter activity independently and additively through binding to the Sp1 binding site in the HGF gene promoter region.
SIGNOR-251739
O95136
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-257123
Q92890
P55072
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-252424
Q13263
P09467
1
ubiquitination
down-regulates quantity by destabilization
0.31
In this study, we demonstrated that the tripartite motif-containing protein 28 (TRIM28) binds directly to and promotes FBP1 for ubiquitination and degradation. MAGE-A3 and MAGE-C2, which are known to be overexpressed in HCC, can enhance TRIM28-dependent degradation of FBP1 by forming ubiquitin ligase complexes with TRIM28.
SIGNOR-267591
Q14493
P33778
1
translation regulation
up-regulates quantity by expression
0.2
Synthesis of mature histone mRNA requires only a single processing reaction: an endonucleolytic cleavage between a conserved stem-loop and a purine-rich downstream element to form the 3' end. The stem-loop binding protein (SLBP) is required for processing, and following processing, histone mRNA is transported to the cytoplasm, where SLBP participates in translation of the histone mRNA|We used radiolabeled probes generated by PCR targeting the open reading frame (ORF) to detect histones H2A, H2B, H3, H4, and H1 and used 7SK snRNA as a loading control (Fig. 2A). The abundance of histone H2A, H2B, H3, and H4 mRNAs is reduced to 37% to 70% of control levels in the SLBP knockdown cells when compared to the C2 control.
SIGNOR-265385
Q13541
P42345
0
phosphorylation
down-regulates activity
0.926
Specifically as part of mTORC1, mTOR directly phosphorylates the ribo- somal protein S6 kinases (S6K1 and S6K2) and the eukaryotic initiation factor 4E (eIF4E)-binding proteins (4E-BP1 and 4E-BP2), both of which control specific steps in the initiation of cap-dependent translation
SIGNOR-167184
P17844
Q9P286
0
phosphorylation
up-regulates quantity by stabilization
0.2
PAK5 promotes RNA helicase DDX5 sumoylation and miRNA-10b processing in a kinase-dependent manner in breast cancer|The increased expression levels of PAK5 and phospho-DDX5 threonine 69 are associated with metastasis and poor clinical outcomes of patients. PAK5 facilitates the phosphorylation-dependent sumoylation of DDX5 to stabilize DDX5. Both the phosphorylation and sumoylation of DDX5 enhance the formation of a DDX5/Drosha/DGCR8 complex, thus promoting microRNA-10b processing.
SIGNOR-275658
P63092
P47900
2
binding
up-regulates activity
0.323
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-256800
Q13485
Q9UKB1
0
ubiquitination
up-regulates
0.2
We have identified scf(beta-trcp1), a ubiquitin (e3) ligase, as a critical determinant for the protein degradation of smad4 protein.
SIGNOR-123060
P13385
Q96S42
2
binding
up-regulates activity
0.661
Nodal effects are dependent upon interactions with Cripto, a small cysteine-rich extracellular protein that is attached to the plasma membrane through a glycosyl phosphatidyl inositol linkage. Cripto interacts with Nodal and ALK4, independently, and promotes the formation of a stable high affinity complex with activin type II receptors.
SIGNOR-251937
P09038
P09629
0
transcriptional regulation
up-regulates quantity by expression
0.396
Band shift and cotransfection experiments showed that HOXB7 directly transactivates the hFGF gene through one out of five putative homeodomain binding sites present in its promoter.
SIGNOR-261639
Q9BYT3
O75969
1
phosphorylation
up-regulates quantity by stabilization
0.2
Differential phosphoproteomic analysis and in vitro kinase assay identified novel phosphorylation substrates of STK33, fibrous sheath components AKAP3 and AKAP4, whose expression levels decreased in testis after deletion of Stk33.
SIGNOR-272955
P25963
Q969T4
0
sumoylation
up-regulates quantity by stabilization
0.346
In the presence of an E1 SUMO-1-activating enzyme, Ubch9 conjugated SUMO-1 to IkappaBalpha primarily on K21, which is also utilized for ubiquitin modification. Thus, SUMO-1-modified IkappaBalpha cannot be ubiquitinated and is resistant to proteasome-mediated degradation. 
SIGNOR-270545
Q99496
Q14157
2
binding
up-regulates activity
0.385
UBAP2L associates with BMI1 and RNF2. UBAP2L, BMI1, RNF2, and PHC1 define a novel Polycomb subcomplex
SIGNOR-261316
Q01718
Q96G30
2
binding
up-regulates activity
0.536
We report that MRAP and MRAP2 can interact with all 5 MCRs. This interaction results in MC2R surface expression and signaling.We have previously identified MRAP as an accessory protein for MC2R, required for receptor trafficking to the cell surface and the formation of a functional MC2R. Here we have identified MRAP2 as a homologue of MRAP. Like MRAP, MRAP2 is able to support MC2R cell-surface expression, producing a functional ACTH-responsive receptor.
SIGNOR-252361
O00548
P46531
2
binding
up-regulates activity
0.627
Notch signaling is a highly conserved pathway involved in cell fate choice during development with Delta and Jagged constituting the two evolutionary conserved families of Notch ligands. These ligands are transmembrane proteins with conserved biochemical structure that share their receptors and signal through a common mechanism. Upon ligand binding Notch receptors are proteoliticaly cleaved, the intracellular domain of Notch (NICD) is released and translocated to the nucleus, where it activates target genes. In mammals, four receptors and five ligands have been described. Delta-1, Delta-3 and Delta-4 are homologues to Drosophila Delta and Jagged-1 and Jagged-2 to Drosophila Serrate.
SIGNOR-209732
Q9UQC2
O60674
0
phosphorylation
up-regulates
0.515
In vitro, activated jak2 directly phosphorylated specific gab2 tyrosine residues. Mutagenesis studies revealed that gab2 tyrosine 643 (y643) was a major target of jak2 in vitro, and a key residue for jak2-dependent phosphorylation in intact cells. Mutation of gab2 y643 inhibited g-csf-stimulated erk1/2 activation and shp2 binding to gab2.
SIGNOR-179488
Q969X5
Q9Y282
2
binding
up-regulates quantity by stabilization
0.374
Among novel cycling proteins we have characterized ERGIC-32, a new ERGIC protein that interacts with human Erv46, a protein previously characterized in yeast and functioning in ER to Golgi protein trafficking. ERGIC-32 interacts with human Erv46 (hErv46) as revealed by covalent cross-linking and mistargeting experiments, and silencing of ERGIC-32 by small interfering RNAs increases the turnover of hErv46. We propose that ERGIC-32 functions as a modulator of the hErv41-hErv46 complex by stabilizing hErv46.
SIGNOR-260637
Q13191
P08069
1
ubiquitination
down-regulates quantity by destabilization
0.422
The ubiquitin ligase Cbl-b also ubiquitinated and degraded IGF-IR and inhibited the Akt/ERK-miR-200c-ZEB2 axis, leading to the repression of IGF-I-induced EMT.
SIGNOR-278607
P08195
Q5T0T0
0
polyubiquitination
down-regulates quantity by destabilization
0.2
Taken together, these findings demonstrate that MARCH8 directly ubiquitinates CD98, and this likely leads to its routing to late endosomes for degradation.
SIGNOR-272755
P84022
O14595
0
dephosphorylation
up-regulates activity
0.424
Dephosphorylation of Smad2/3 Linkers by SCP2 and SCP3|MAPK-mediated linker phosphorylation appears to have a dual role in Smad2/3 regulation. Mitogens and hyperactive Ras result in extracellular signal-regulated kinase (ERK)-mediated phosphorylation of Smad3 at Ser-204, Ser-208, and Thr-179 and of Smad2 at Ser-245/250/255 and Thr-220. Mutation of these sites increases the ability of Smad3 to activate target genes, suggesting that MAPK phosphorylation of Smad3 is inhibitory (11, 12). However, in contrast, ERK-dependent phosphorylation of Smad2 at Thr-8 enhances its transcriptional activity
SIGNOR-248293
Q00534
P46527
1
phosphorylation
up-regulates
0.855
Phosphorylation on ser-10 is the major site of phosphorylation in resting cells, takes place at the g(0)-g1 phase and leads to protein stability.p27(kip1) was phosphorylated by v-cyclin-cdk6 predominantly on ser10, which enhances its cytoplasmic localization.
SIGNOR-140401
P49841
P27361
0
phosphorylation
down-regulates activity
0.294
We demonstrate that insulin-mediated activation of ERK1/2 results in phosphorylation of GSK3β at S9 independently of Akt/mTORC1 activity in Tsc2 null mouse embryonic fibroblasts. In addition, we show that inhibition of ERK1/2 rescues GSK3β activity and restores protein synthesis in Tsc2 −/− MEFs to normal levels
SIGNOR-262523
Q13546
Q8IUC6
2
binding
up-regulates activity
0.733
TRIF also recruits the adaptor RIP1 through the distinct RIP homotypic interaction motif. RIP1 undergoes K63-linked polyubiquitination after stimulation by TLR3 agonists, and this modification is required for NF-_B activation.
SIGNOR-216313
Q14164
Q9HCE1
2
binding
up-regulates activity
0.2
MOV10 enhances IRF3 activation and IRF3-mediated gene induction. This indicated that MOV10-mediated antiviral activity is most likely mediated through IKKε and not through TBK1. Involvement of IKKε was further established by examining the physical interaction of MOV10 and IKKε.
SIGNOR-261138
Q92915
P35498
2
binding
down-regulates activity
0.361
Sodium channel fast inactivation is modulated by alpha subunit interaction with a family of cytoplasmic proteins termed fibroblast growth factor homologous factors (FHFs). In this paper, we report that all A-type FHFs exert rapid onset long-term inactivation on Nav1.6 and other sodium channels.
SIGNOR-253421
Q9Y6E0
Q05209
1
phosphorylation
down-regulates activity
0.272
In addition, MST3 can phosphorylate PTP-PEST and inhibit the tyrosine phosphatase activity of PTP-PEST.|MST3 directly phosphorylates and inactivates protein tyrosine phosphatase PTP-PEST, which enhances cell migration by enhancing the tyrosine phosphorylation of paxillin Y31 and Y118 [ ].
SIGNOR-279127
Q12857
P41161
1
transcriptional regulation
down-regulates quantity
0.2
By integrating transcriptomic profiling (RNA-seq) of Nfia- and Nfix-deficient GNPs with epigenomic profiling (ChIP-seq against NFIA, NFIB and NFIX, and DNase I hypersensitivity assays), we reveal that these transcription factors share a large set of potential transcriptional targets, suggestive of complementary roles for these NFI family members in promoting neural development
SIGNOR-268874
O95835
Q9H8S9
2
binding
up-regulates
0.941
Lats1/2 are activated by association with the highly homologous scaffold proteins mps one binder kinase activator-like 1a (mobkl1a) and 1b (mobkl1b), which are collectively referred to as mob1
SIGNOR-169752
P15976
O15379
1
relocalization
up-regulates activity
0.55
GATA1 is a new substrate of p21-activated kinase 5 (PAK5), which is phosphorylated on serine 161 and 187 (S161 and S187). GATA1 recruits HDAC3/4 to E-cadherin promoter, which is reduced by GATA1 S161A S187A mutant. These data indicate that phosphorylated GATA1 recruits more HDAC3/4 to promote transcriptional repression of E-cadherin, leading to the EMT of breast cancer cells.
SIGNOR-275664
P45452
P02458
1
cleavage
down-regulates quantity by destabilization
0.544
Although it appears that MMP-1 and MMP-13 both cleave type II collagen initially at the same site, MMP-13 affects a secondary cleavage to produce a 1/4-size collagen fragment with an NH2 terminus three amino acids removed from the primary cleavage site.The present work has demonstrated expression of MMP-13 in human osteoarthritic cartilage and shown that MMP-13 has significant type II collagen degrading activity.
SIGNOR-256340
Q8IYW5
Q12888
1
ubiquitination
up-regulates quantity
0.822
E3 ligase RNF168-mediated 53BP1 ubiquitination through activated the mechanistic target of rapamycin (mTOR)-ribosomal S6 kinase (S6K) signaling and increased 53BP1 protein stability in response to IR|We further found that overexpression of RNF168 enhanced 53BP1 ubiquitination inhibited by G0S2 overexpression in U87 and LN229 cells in response to IR (Fig. xref f).
SIGNOR-278777
P0DMS8
P08754
2
binding
up-regulates activity
0.453
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-256814
P60484
O00308
0
ubiquitination
down-regulates quantity by destabilization
0.632
We have shown that WWP2 interacts with and ubiquitylates PTEN, promoting its degradation.
SIGNOR-278650
P12931
Q8IW41
1
phosphorylation
up-regulates quantity
0.372
These data strongly suggest that PRAK phosphorylation by Src on Y188 and Y216 drives the relocalization of PRAK to focal adhesion structures during cell adhesion.
SIGNOR-279762
Q99933
P10415
2
binding
up-regulates activity
0.415
Cloning and functional analysis of BAG-1: A novel Bcl-2-binding protein with anti-cell death activity|
SIGNOR-254118
P31749
P52789
1
phosphorylation
up-regulates activity
0.445
K63-linked ubiquitination enhances the interaction between Akt and HK2 and eventually increases HK2 phosphorylation on Thr473 and mitochondrial localization
SIGNOR-259984
P24941
Q08999
1
phosphorylation
down-regulates
0.849
When expressed in u2os cells, the phosphorylation-deficient mutant p130(delta)(cdk4), in which the cdk4 specific sites were mutated to alanine residues, imposed a more sustained g1 arrest than a constitutively active prb(delta)(cdk), known to repress all cellular e2f activity
SIGNOR-87492
P53350
O60216
1
dephosphorylation
down-regulates quantity by destabilization
0.737
We suspected that the observed enhancement of Scc1's cleavability in the presence of Plk1 might be due to phosphorylation at two sites that are directly adjacent to the cleavage sites, Ser175 and Ser454, which we had found to be phosphorylated in mitosis in vivo (Table 1). We therefore mutated these two residues to alanine, thereby creating mutant Scc1-S175A/S454A (see Figure 1C), and tested the cleavability of this mutant in the absence or presence of Plk1 in vitro. |Scc1 phosphorylation is dispensable for cohesin dissociation from chromosomes in early mitosis but enhances the cleavability of Scc1 by separase.
SIGNOR-275535
P31749
P15559
1
phosphorylation
down-regulates quantity by destabilization
0.369
Akt phosphorylates NQO1 on S40 and T128 residues. Here we show that Akt phosphorylates NQO1 at T128 residues and triggers its polyubiquitination and proteasomal degradation, abrogating its antioxidative effects in PD. Akt binds NQO1 in a phosphorylation-dependent manner. Interestingly, Akt, but not PINK1, provokes NQO1 phosphorylation and polyubiquitination with Parkin as an E3 ligase. 
SIGNOR-276868
O43255
Q92667
1
polyubiquitination
down-regulates quantity by destabilization
0.507
Seven In-Absentia Homolog 2 (Siah2), an E3-ubiquitin ligase whose expression is induced in hypoxic conditions, formed a complex and degraded AKAP121.
SIGNOR-272641
Q12852
Q9UQF2
2
binding
down-regulates
0.516
Jip inhibits dlk dimerization.
SIGNOR-109046
P52732
Q9HC98
0
phosphorylation
up-regulates activity
0.444
Nek6 phosphorylated Eg5 at several sites in vitro and one of these sites, Ser1033, is phosphorylated in vivo during mitosis. Whereas CDK1 phosphorylates nearly all Eg5 at Thr926 during mitosis, Nek6 phosphorylates approximately 3% of Eg5, primarily at the spindle poles. 
SIGNOR-273886
P18075
Q13705
2
binding
up-regulates
0.544
We show that bmp7 and activin bind to the same type ii receptors, actrii and iib, but recruit distinct type i receptors into heteromeric receptor complexes.
SIGNOR-60240
P51955
Q12834
1
phosphorylation
up-regulates activity
0.945
In summary, we have demonstrated that Nek2 can associate with and phosphorylate Mad2 and Cdc20.|The results presented here support a model in which Nek2 modulates the functions of Mad2 and Cdc20 in the mitotic checkpoint and elevation of Nek2 levels may contribute to chromosome instability by interfering with the control of the checkpoint.
SIGNOR-278366
Q9Y484
Q2TAZ0
2
binding
up-regulates activity
0.522
WIPI4 interacts with ATG2, AMPK and ULK1. Upon starvation and AMPK activation, WIPI4-ATG2 dissociates from AMPK and ULK1 and localizes at nascent autophagosomes, potentially supporting further autophagosome maturation.
SIGNOR-268483
Q9UBS0
P09651
1
phosphorylation
up-regulates activity
0.416
Here, we show that S6K2 binds and phosphorylates hnRNPA1 on novel Ser4/6 sites, increasing its association with BCL-XL and XIAP mRNAs to promote their nuclear export.
SIGNOR-279569