Lys420

Site Information
LTRLLQTkNYDIGAA SwissProt Entrez-Gene
Blast this site against: NCBI SwissProt PDB
Site Group ID: 12256934

In vivo Characterization
Methods used to characterize site in vivo:	immunoprecipitation ( 1 , 2 , 3 , 6 , 8 ) , mass spectrometry ( 4 , 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 , 23 , 24 , 25 , 26 , 27 , 28 , 29 , 30 , 31 , 32 , 33 ) , microscopy-colocalization with upstream kinase ( 2 ) , mutation of modification site ( 1 , 2 , 6 , 8 ) , western blotting ( 1 , 2 , 3 , 6 , 8 )
Disease tissue studied:	liver cancer ( 1 ) , hepatocellular carcinoma ( 1 ) , pituitary cancer ( 3 ) , multiple myeloma ( 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 ) , prostate cancer ( 2 )
Relevant cell line - cell type - tissue:	AMO-1 (plasma cell) ( 17 , 18 , 19 , 20 , 21 , 22 ) , AtT20 (pituitary cell) ( 3 ) , DU 145 (prostate cell) ( 2 ) , HEK293T (epithelial) ( 1 , 2 , 3 , 8 ) , HeLa (cervical) ( 3 ) , HEp-2 (squamous) ( 4 ) , Hep3B (hepatic) ( 1 ) , HepG2 (hepatic) ( 1 ) , Huh7 (hepatic) ( 1 ) , JJN3 (plasma cell) ( 28 ) , Jurkat (T lymphocyte) ( 4 , 9 , 10 ) , KMS-27 (B lymphocyte) ( 26 , 27 ) , L-363 (plasma cell) ( 12 , 13 , 14 , 15 ) , LNCaP (prostate cell) ( 33 ) , MEF (fibroblast) ( 3 , 6 ) , NCCIT (epithelial) ( 23 ) , NCI-H929 (B lymphocyte) ( 24 , 25 ) , PC3 (prostate cell) ( 2 , 32 ) , PLC/PRF/5 (hepatic) ( 1 ) , RPMI-8266 (plasma cell) ( 16 ) , U266 (plasma cell) ( 29 , 30 )

Downstream Regulation
Effects of modification on SQSTM1:	protein degradation ( 1 , 3 , 6 ) , ubiquitination ( 2 , 6 )
Effects of modification on biological processes:	autophagy, induced ( 3 , 6 ) , autophagy, inhibited ( 2 ) , cell growth, induced ( 1 )
Inhibit interaction with:	SQSTM1 (human) ( 2 )

References
1	Liang X, et al. (2023) The TRAF2-p62 axis promotes proliferation and survival of liver cancer by activating mTORC1 pathway. Cell Death Differ 30, 1550-1562 37081115 Curated Info
2	Shi Q, et al. (2022) SPOP mutations promote p62/SQSTM1-dependent autophagy and Nrf2 activation in prostate cancer. Cell Death Differ 29, 1228-1239 34987184 Curated Info
3	Peng H, et al. (2020) The ubiquitin-specific protease USP8 directly deubiquitinates SQSTM1/p62 to suppress its autophagic activity. Autophagy 16, 698-708 31241013 Curated Info
4	Akimov V, et al. (2018) UbiSite approach for comprehensive mapping of lysine and N-terminal ubiquitination sites. Nat Struct Mol Biol 25, 631-640 29967540 Curated Info
5	Lumpkin RJ, et al. (2017) Site-specific identification and quantitation of endogenous SUMO modifications under native conditions. Nat Commun 8, 1171 29079793 Curated Info
6	Lee Y, et al. (2017) Keap1/Cullin3 Modulates p62/SQSTM1 Activity via UBA Domain Ubiquitination. Cell Rep 19, 188-202 28380357 Curated Info
7	Boeing S, et al. (2016) Multiomic Analysis of the UV-Induced DNA Damage Response. Cell Rep 15, 1597-1610 27184836 Curated Info
8	Song P, et al. (2016) Parkin promotes proteasomal degradation of p62: implication of selective vulnerability of neuronal cells in the pathogenesis of Parkinson's disease. Protein Cell 7, 114-29 26746706 Curated Info
9	Mertins P, et al. (2013) Integrated proteomic analysis of post-translational modifications by serial enrichment. Nat Methods 10, 634-7 23749302 Curated Info
10	Udeshi ND, et al. (2013) Refined preparation and use of anti-diglycine remnant (K-ε-GG) antibody enables routine quantification of 10,000s of ubiquitination sites in single proteomics experiments. Mol Cell Proteomics 12, 825-31 23266961 Curated Info
11	Kim W, et al. (2011) Systematic and quantitative assessment of the ubiquitin-modified proteome. Mol Cell 44, 325-40 21906983 Curated Info
12	Guo A (2010) CST Curation Set: 10367; Year: 2010; Biosample/Treatment: cell line, L363/untreated; Disease: -; SILAC: -; Specificities of Antibodies Used to Purify Peptides prior to LCMS: Ub(K-e-GG) Antibodies Used to Purify Peptides prior to LCMS: Ubiquitin (D4A7A10) XP(R) Rabbit mAb Cat#: 3925, PTMScan(R) Ubiquitin Branch Motif (K-e-GG) Immunoaffinity Beads Cat#: 1990 Curated Info
13	Guo A (2010) CST Curation Set: 10366; Year: 2010; Biosample/Treatment: cell line, L363/untreated; Disease: -; SILAC: -; Specificities of Antibodies Used to Purify Peptides prior to LCMS: Ub(K-e-GG) Antibodies Used to Purify Peptides prior to LCMS: Ubiquitin (D4A7A10) XP(R) Rabbit mAb Cat#: 3925, PTMScan(R) Ubiquitin Branch Motif (K-e-GG) Immunoaffinity Beads Cat#: 1990 Curated Info
14	Guo A (2010) CST Curation Set: 10260; Year: 2010; Biosample/Treatment: cell line, L363/untreated; Disease: -; SILAC: -; Specificities of Antibodies Used to Purify Peptides prior to LCMS: Ub(K-e-GG) Antibodies Used to Purify Peptides prior to LCMS: Ubiquitin (D4A7A10) XP(R) Rabbit mAb Cat#: 3925, PTMScan(R) Ubiquitin Branch Motif (K-e-GG) Immunoaffinity Beads Cat#: 1990 Curated Info
15	Guo A (2010) CST Curation Set: 10261; Year: 2010; Biosample/Treatment: cell line, L363/untreated; Disease: -; SILAC: -; Specificities of Antibodies Used to Purify Peptides prior to LCMS: Ub(K-e-GG) Antibodies Used to Purify Peptides prior to LCMS: Ubiquitin (D4A7A10) XP(R) Rabbit mAb Cat#: 3925, PTMScan(R) Ubiquitin Branch Motif (K-e-GG) Immunoaffinity Beads Cat#: 1990 Curated Info
16	Guo A (2010) CST Curation Set: 10262; Year: 2010; Biosample/Treatment: cell line, RPMI-8266/untreated; Disease: -; SILAC: -; Specificities of Antibodies Used to Purify Peptides prior to LCMS: Ub(K-e-GG) Antibodies Used to Purify Peptides prior to LCMS: Ubiquitin (D4A7A10) XP(R) Rabbit mAb Cat#: 3925, PTMScan(R) Ubiquitin Branch Motif (K-e-GG) Immunoaffinity Beads Cat#: 1990 Curated Info
17	Guo A (2010) CST Curation Set: 9912; Year: 2010; Biosample/Treatment: cell line, AMO-1/Velcade; Disease: -; SILAC: -; Specificities of Antibodies Used to Purify Peptides prior to LCMS: Ub(K-e-GG) Antibodies Used to Purify Peptides prior to LCMS: Ubiquitin (D4A7A10) XP(R) Rabbit mAb Cat#: 3925, PTMScan(R) Ubiquitin Branch Motif (K-e-GG) Immunoaffinity Beads Cat#: 1990 Curated Info
18	Guo A (2010) CST Curation Set: 9913; Year: 2010; Biosample/Treatment: cell line, AMO-1/Velcade; Disease: -; SILAC: -; Specificities of Antibodies Used to Purify Peptides prior to LCMS: Ub(K-e-GG) Antibodies Used to Purify Peptides prior to LCMS: Ubiquitin (D4A7A10) XP(R) Rabbit mAb Cat#: 3925, PTMScan(R) Ubiquitin Branch Motif (K-e-GG) Immunoaffinity Beads Cat#: 1990 Curated Info
19	Guo A (2010) CST Curation Set: 9914; Year: 2010; Biosample/Treatment: cell line, AMO-1/Velcade; Disease: -; SILAC: -; Specificities of Antibodies Used to Purify Peptides prior to LCMS: Ub(K-e-GG) Antibodies Used to Purify Peptides prior to LCMS: Ubiquitin (D4A7A10) XP(R) Rabbit mAb Cat#: 3925, PTMScan(R) Ubiquitin Branch Motif (K-e-GG) Immunoaffinity Beads Cat#: 1990 Curated Info
20	Guo A (2010) CST Curation Set: 9189; Year: 2010; Biosample/Treatment: cell line, AMO-1/untreated; Disease: -; SILAC: -; Specificities of Antibodies Used to Purify Peptides prior to LCMS: Ub(K-e-GG) Antibodies Used to Purify Peptides prior to LCMS: Ubiquitin (D4A7A10) XP(R) Rabbit mAb Cat#: 3925, PTMScan(R) Ubiquitin Branch Motif (K-e-GG) Immunoaffinity Beads Cat#: 1990 Curated Info
21	Guo A (2010) CST Curation Set: 8771; Year: 2009; Biosample/Treatment: cell line, AMO-1/Velcade; Disease: -; SILAC: -; Specificities of Antibodies Used to Purify Peptides prior to LCMS: Ub(K-e-GG) Antibodies Used to Purify Peptides prior to LCMS: Ubiquitin (D4A7A10) XP(R) Rabbit mAb Cat#: 3925, PTMScan(R) Ubiquitin Branch Motif (K-e-GG) Immunoaffinity Beads Cat#: 1990 Curated Info
22	Guo A (2010) CST Curation Set: 8770; Year: 2009; Biosample/Treatment: cell line, AMO-1/Velcade; Disease: -; SILAC: -; Specificities of Antibodies Used to Purify Peptides prior to LCMS: Ub(K-e-GG) Antibodies Used to Purify Peptides prior to LCMS: Ubiquitin (D4A7A10) XP(R) Rabbit mAb Cat#: 3925, PTMScan(R) Ubiquitin Branch Motif (K-e-GG) Immunoaffinity Beads Cat#: 1990 Curated Info
23	Zhou J (2010) CST Curation Set: 9131; Year: 2010; Biosample/Treatment: cell line, NCCIT/untreated; Disease: -; SILAC: -; Specificities of Antibodies Used to Purify Peptides prior to LCMS: Ub(K-e-GG) Curated Info
24	Guo A (2009) CST Curation Set: 8678; Year: 2009; Biosample/Treatment: cell line, NCI-H929/Velcade; Disease: -; SILAC: -; Specificities of Antibodies Used to Purify Peptides prior to LCMS: Ub(K-e-GG) Antibodies Used to Purify Peptides prior to LCMS: Ubiquitin (D4A7A10) XP(R) Rabbit mAb Cat#: 3925, PTMScan(R) Ubiquitin Branch Motif (K-e-GG) Immunoaffinity Beads Cat#: 1990 Curated Info
25	Guo A (2009) CST Curation Set: 8677; Year: 2009; Biosample/Treatment: cell line, NCI-H929/Velcade; Disease: -; SILAC: -; Specificities of Antibodies Used to Purify Peptides prior to LCMS: Ub(K-e-GG) Antibodies Used to Purify Peptides prior to LCMS: Ubiquitin (D4A7A10) XP(R) Rabbit mAb Cat#: 3925, PTMScan(R) Ubiquitin Branch Motif (K-e-GG) Immunoaffinity Beads Cat#: 1990 Curated Info
26	Guo A (2009) CST Curation Set: 8663; Year: 2009; Biosample/Treatment: cell line, KMS-27/Velcade; Disease: -; SILAC: -; Specificities of Antibodies Used to Purify Peptides prior to LCMS: Ub(K-e-GG) Antibodies Used to Purify Peptides prior to LCMS: Ubiquitin (D4A7A10) XP(R) Rabbit mAb Cat#: 3925, PTMScan(R) Ubiquitin Branch Motif (K-e-GG) Immunoaffinity Beads Cat#: 1990 Curated Info
27	Guo A (2009) CST Curation Set: 8659; Year: 2009; Biosample/Treatment: cell line, KMS-27/untreated; Disease: -; SILAC: -; Specificities of Antibodies Used to Purify Peptides prior to LCMS: Ub(K-e-GG) Antibodies Used to Purify Peptides prior to LCMS: Ubiquitin (D4A7A10) XP(R) Rabbit mAb Cat#: 3925, PTMScan(R) Ubiquitin Branch Motif (K-e-GG) Immunoaffinity Beads Cat#: 1990 Curated Info
28	Guo A (2009) CST Curation Set: 8649; Year: 2009; Biosample/Treatment: cell line, JJN3/Velcade; Disease: -; SILAC: -; Specificities of Antibodies Used to Purify Peptides prior to LCMS: Ub(K-e-GG) Antibodies Used to Purify Peptides prior to LCMS: Ubiquitin (D4A7A10) XP(R) Rabbit mAb Cat#: 3925, PTMScan(R) Ubiquitin Branch Motif (K-e-GG) Immunoaffinity Beads Cat#: 1990 Curated Info
29	Guo A (2009) CST Curation Set: 8646; Year: 2009; Biosample/Treatment: cell line, U266/Velcade; Disease: -; SILAC: -; Specificities of Antibodies Used to Purify Peptides prior to LCMS: Ub(K-e-GG) Antibodies Used to Purify Peptides prior to LCMS: Ubiquitin (D4A7A10) XP(R) Rabbit mAb Cat#: 3925, PTMScan(R) Ubiquitin Branch Motif (K-e-GG) Immunoaffinity Beads Cat#: 1990 Curated Info
30	Guo A (2009) CST Curation Set: 8645; Year: 2009; Biosample/Treatment: cell line, U266/Velcade; Disease: -; SILAC: -; Specificities of Antibodies Used to Purify Peptides prior to LCMS: Ub(K-e-GG) Antibodies Used to Purify Peptides prior to LCMS: Ubiquitin (D4A7A10) XP(R) Rabbit mAb Cat#: 3925, PTMScan(R) Ubiquitin Branch Motif (K-e-GG) Immunoaffinity Beads Cat#: 1990 Curated Info
31	Guo A (2009) CST Curation Set: 8634; Year: 2009; Biosample/Treatment: cell line, AMO-1/Velcade; Disease: -; SILAC: -; Specificities of Antibodies Used to Purify Peptides prior to LCMS: Ub(K-e-GG) Antibodies Used to Purify Peptides prior to LCMS: Ubiquitin (D4A7A10) XP(R) Rabbit mAb Cat#: 3925, PTMScan(R) Ubiquitin Branch Motif (K-e-GG) Immunoaffinity Beads Cat#: 1990 Curated Info
32	Possemato A (2009) CST Curation Set: 8587; Year: 2010; Biosample/Treatment: cell line, PC3/Velcade; Disease: prostate cancer; SILAC: -; Specificities of Antibodies Used to Purify Peptides prior to LCMS: Ub(K-e-GG) Curated Info
33	Possemato A (2009) CST Curation Set: 8247; Year: 2010; Biosample/Treatment: cell line, LNCaP/Velcade; Disease: prostate cancer; SILAC: -; Specificities of Antibodies Used to Purify Peptides prior to LCMS: Ub(K-e-GG) Curated Info