Ser251

Site Information
PskRACAsPsAQVEG SwissProt Entrez-Gene
Blast this site against: NCBI SwissProt PDB
Site Group ID: 453861

In vivo Characterization
Methods used to characterize site in vivo:	mass spectrometry ( 1 , 2 , 4 , 5 , 6 , 7 , 8 , 9 , 10 , 11 , 12 , 13 , 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 , 23 , 24 , 25 , 26 , 27 , 28 , 29 , 30 , 31 , 32 , 33 )
Disease tissue studied:	breast cancer ( 5 , 8 , 9 ) , breast ductal carcinoma ( 8 ) , breast cancer, triple negative ( 8 ) , leukemia ( 19 , 28 ) , chronic myelogenous leukemia ( 19 , 28 ) , lung cancer ( 11 ) , non-small cell lung adenocarcinoma ( 11 ) , neuroblastoma ( 1 ) , ovarian cancer ( 8 ) , melanoma skin cancer ( 6 )
Relevant cell line - cell type - tissue:	'stem, embryonic' ( 21 ) , 293 (epithelial) [AT1 (human), transfection] ( 17 ) , 293 (epithelial) ( 22 ) , breast ( 8 ) , CLB-Bar ( 1 ) , HEK293T (epithelial) ( 32 ) , HeLa (cervical) ( 7 , 13 , 24 , 25 , 27 , 29 , 30 , 33 ) , HMLER ('stem, breast cancer') [CXCR4 (human), knockdown] ( 9 ) , HMLER ('stem, breast cancer') ( 9 ) , HUES-7 ('stem, embryonic') ( 20 ) , Jurkat (T lymphocyte) ( 12 , 15 , 16 , 18 , 26 , 31 ) , K562 (erythroid) ( 13 , 19 , 28 ) , lung ( 11 ) , MCF-7 (breast cell) ( 4 , 5 ) , NCI-H460 (pulmonary) ( 23 ) , ovary ( 8 ) , PANC-1 (pancreatic) [PRP4 (human), knockdown, Lentiviral introduced doxycycline-inducible PRP4 shRNA] ( 10 ) , PANC-1 (pancreatic) ( 10 ) , Vero E6-S ('epithelial, kidney') ( 2 ) , WM239A (melanocyte) ( 6 )

Upstream Regulation
Regulatory protein:	PRP4 (human) ( 10 )
Treatments:	EGF ( 30 ) , metformin ( 4 )

References
1	Borenäs M, et al. (2024) ALK signaling primes the DNA damage response sensitizing ALK-driven neuroblastoma to therapeutic ATR inhibition. Proc Natl Acad Sci U S A 121, e2315242121 38154064 Curated Info
2	Bouhaddou M, et al. (2020) The Global Phosphorylation Landscape of SARS-CoV-2 Infection. Cell 182 32645325 Curated Info
3	Boeing S, et al. (2016) Multiomic Analysis of the UV-Induced DNA Damage Response. Cell Rep 15, 1597-1610 27184836 Curated Info
4	Sacco F, et al. (2016) Deep Proteomics of Breast Cancer Cells Reveals that Metformin Rewires Signaling Networks Away from a Pro-growth State. Cell Syst 2, 159-71 27135362 Curated Info
5	Carrier M, et al. (2016) Phosphoproteome and Transcriptome of RA-Responsive and RA-Resistant Breast Cancer Cell Lines. PLoS One 11, e0157290 27362937 Curated Info
6	Stuart SA, et al. (2015) A Phosphoproteomic Comparison of B-RAFV600E and MKK1/2 Inhibitors in Melanoma Cells. Mol Cell Proteomics 14, 1599-615 25850435 Curated Info
7	Sharma K, et al. (2014) Ultradeep human phosphoproteome reveals a distinct regulatory nature of Tyr and Ser/Thr-based signaling. Cell Rep 8, 1583-94 25159151 Curated Info
8	Mertins P, et al. (2014) Ischemia in tumors induces early and sustained phosphorylation changes in stress kinase pathways but does not affect global protein levels. Mol Cell Proteomics 13, 1690-704 24719451 Curated Info
9	Yi T, et al. (2014) Quantitative phosphoproteomic analysis reveals system-wide signaling pathways downstream of SDF-1/CXCR4 in breast cancer stem cells. Proc Natl Acad Sci U S A 111, E2182-90 24782546 Curated Info
10	Gao Q, et al. (2013) Evaluation of cancer dependence and druggability of PRP4 kinase using cellular, biochemical, and structural approaches. J Biol Chem 288, 30125-38 24003220 Curated Info
11	Schweppe DK, Rigas JR, Gerber SA (2013) Quantitative phosphoproteomic profiling of human non-small cell lung cancer tumors. J Proteomics 91, 286-96 23911959 Curated Info
12	Mertins P, et al. (2013) Integrated proteomic analysis of post-translational modifications by serial enrichment. Nat Methods 10, 634-7 23749302 Curated Info
13	Zhou H, et al. (2013) Toward a comprehensive characterization of a human cancer cell phosphoproteome. J Proteome Res 12, 260-71 23186163 Curated Info
14	Beli P, et al. (2012) Proteomic Investigations Reveal a Role for RNA Processing Factor THRAP3 in the DNA Damage Response. Mol Cell 46, 212-25 22424773 Curated Info
15	Guo A (2011) CST Curation Set: 12740; Year: 2011; Biosample/Treatment: cell line, Jurkat/calyculin_A & pervanadate; Disease: T cell leukemia; SILAC: -; Specificities of Antibodies Used to Purify Peptides prior to LCMS: PXpSP, pSPX(K/R) Antibodies Used to Purify Peptides prior to LCMS: Phospho-MAPK/CDK Substrates (PXSP or SPXR/K) (34B2) Rabbit mAb Cat#: 2325, PTMScan(R) Phospho-MAPK/CDK Substrate Motif (PXSP, SPXK/R) Immunoaffinity Beads Cat#: 1982 Curated Info
16	Guo A (2011) CST Curation Set: 12741; Year: 2011; Biosample/Treatment: cell line, Jurkat/calyculin_A & pervanadate; Disease: T cell leukemia; SILAC: -; Specificities of Antibodies Used to Purify Peptides prior to LCMS: PXpSP, pSPX(K/R) Antibodies Used to Purify Peptides prior to LCMS: Phospho-MAPK/CDK Substrates (PXSP or SPXR/K) (34B2) Rabbit mAb Cat#: 2325, PTMScan(R) Phospho-MAPK/CDK Substrate Motif (PXSP, SPXK/R) Immunoaffinity Beads Cat#: 1982 Curated Info
17	Xiao K, et al. (2010) Global phosphorylation analysis of beta-arrestin-mediated signaling downstream of a seven transmembrane receptor (7TMR). Proc Natl Acad Sci U S A 107, 15299-304 20686112 Curated Info
18	Possemato A (2010) CST Curation Set: 10050; Year: 2010; Biosample/Treatment: cell line, Jurkat/calyculin_A & pervanadate; Disease: T cell leukemia; SILAC: -; Specificities of Antibodies Used to Purify Peptides prior to LCMS: PXpSP, pSPX(K/R) Antibodies Used to Purify Peptides prior to LCMS: Phospho-MAPK/CDK Substrates (PXSP or SPXR/K) (34B2) Rabbit mAb Cat#: 2325, PTMScan(R) Phospho-MAPK/CDK Substrate Motif (PXSP, SPXK/R) Immunoaffinity Beads Cat#: 1982 Curated Info
19	Moritz A (2009) CST Curation Set: 8722; Year: 2009; Biosample/Treatment: cell line, K562/untreated; Disease: chronic myelogenous leukemia; SILAC: -; Specificities of Antibodies Used to Purify Peptides prior to LCMS: PXpSP, pSPX(K/R) Antibodies Used to Purify Peptides prior to LCMS: Phospho-MAPK/CDK Substrates (PXSP or SPXR/K) (34B2) Rabbit mAb Cat#: 2325, PTMScan(R) Phospho-MAPK/CDK Substrate Motif (PXSP, SPXK/R) Immunoaffinity Beads Cat#: 1982 Curated Info
20	Van Hoof D, et al. (2009) Phosphorylation dynamics during early differentiation of human embryonic stem cells. Cell Stem Cell 5, 214-26 19664995 Curated Info
21	Brill LM, et al. (2009) Phosphoproteomic analysis of human embryonic stem cells. Cell Stem Cell 5, 204-13 19664994 Curated Info
22	Gauci S, et al. (2009) Lys-N and trypsin cover complementary parts of the phosphoproteome in a refined SCX-based approach. Anal Chem 81, 4493-501 19413330 Curated Info
23	Nagano K, et al. (2009) Phosphoproteomic analysis of distinct tumor cell lines in response to nocodazole treatment. Proteomics 9, 2861-74 19415658 Curated Info
24	Chen Y, et al. (2009) Combined integrin phosphoproteomic analyses and small interfering RNA--based functional screening identify key regulators for cancer cell adhesion and migration. Cancer Res 69, 3713-20 19351860 Curated Info
25	Chen RQ, et al. (2009) CDC25B mediates rapamycin-induced oncogenic responses in cancer cells. Cancer Res 69, 2663-8 19276368 Curated Info
26	Mayya V, et al. (2009) Quantitative phosphoproteomic analysis of T cell receptor signaling reveals system-wide modulation of protein-protein interactions. Sci Signal 2, ra46 19690332 Curated Info
27	Dephoure N, et al. (2008) A quantitative atlas of mitotic phosphorylation. Proc Natl Acad Sci U S A 105, 10762-7 18669648 Curated Info
28	Stokes M (2008) CST Curation Set: 4390; Year: 2008; Biosample/Treatment: cell line, K562/untreated; Disease: chronic myelogenous leukemia; SILAC: -; Specificities of Antibodies Used to Purify Peptides prior to LCMS: p[STY]) Curated Info
29	Ruse CI, et al. (2008) Motif-specific sampling of phosphoproteomes. J Proteome Res 7, 2140-50 18452278 Curated Info
30	Cantin GT, et al. (2008) Combining protein-based IMAC, peptide-based IMAC, and MudPIT for efficient phosphoproteomic analysis. J Proteome Res 7, 1346-51 18220336 Curated Info
31	Stokes M (2008) CST Curation Set: 3883; Year: 2008; Biosample/Treatment: cell line, Jurkat/pervanadate; Disease: T cell leukemia; SILAC: -; Specificities of Antibodies Used to Purify Peptides prior to LCMS: p[STY]) Curated Info
32	Matsuoka S, et al. (2007) ATM and ATR substrate analysis reveals extensive protein networks responsive to DNA damage. Science 316, 1160-6 17525332 Curated Info
33	Beausoleil SA, et al. (2004) Large-scale characterization of HeLa cell nuclear phosphoproteins. Proc Natl Acad Sci U S A 101, 12130-5 15302935 Curated Info