CPLM-000070

Genbank Nucleotide ID

Histone deacetylase complex subunit SAP18

Protein Synonyms/Alias

18 kDa Sin3-associated polypeptide; 2HOR0202; Cell growth-inhibiting gene 38 protein; Sin3-associated polypeptide p18

Homo sapiens (Human)

Position	Peptide	Type	References
13	RVTQEEIKKEPEKPI	sumoylation	[1]
24	EKPIDREKTCPLLLR	ubiquitination	[2, 3]
74	KELTSLVKEVYPEAR	ubiquitination	[2, 4, 5, 6, 7, 8, 9]
104	KRPGYRVKEIGSTMS	ubiquitination	[2, 6]
114	GSTMSGRKGTDDSMT	ubiquitination	[2, 6]
126	SMTLQSQKFQIGDYL	ubiquitination	[6]

[1] Site-specific identification of SUMO-2 targets in cells reveals an inverted SUMOylation motif and a hydrophobic cluster SUMOylation motif.
Matic I, Schimmel J, Hendriks IA, van Santen MA, van de Rijke F, van Dam H, Gnad F, Mann M, Vertegaal AC.
Mol Cell. 2010 Aug 27;39(4):641-52. [PMID: 20797634]
[2] 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.
Udeshi ND, Svinkina T, Mertins P, Kuhn E, Mani DR, Qiao JW, Carr SA.
Mol Cell Proteomics. 2013 Mar;12(3):825-31. [PMID: 23266961]
[3] Integrated proteomic analysis of post-translational modifications by serial enrichment.
Mertins P, Qiao JW, Patel J, Udeshi ND, Clauser KR, Mani DR, Burgess MW, Gillette MA, Jaffe JD, Carr SA.
Nat Methods. 2013 Jul;10(7):634-7. [PMID: 23749302]
[4] Global analysis of lysine ubiquitination by ubiquitin remnant immunoaffinity profiling.
Xu G, Paige JS, Jaffrey SR.
Nat Biotechnol. 2010 Aug;28(8):868-73. [PMID: 20639865]
[5] A proteome-wide, quantitative survey of in vivo ubiquitylation sites reveals widespread regulatory roles.
Wagner SA, Beli P, Weinert BT, Nielsen ML, Cox J, Mann M, Choudhary C.
Mol Cell Proteomics. 2011 Oct;10(10):M111.013284. [PMID: 21890473]
[6] Systematic and quantitative assessment of the ubiquitin-modified proteome.
Kim W, Bennett EJ, Huttlin EL, Guo A, Li J, Possemato A, Sowa ME, Rad R, Rush J, Comb MJ, Harper JW, Gygi SP.
Mol Cell. 2011 Oct 21;44(2):325-40. [PMID: 21906983]
[7] Methods for quantification of in vivo changes in protein ubiquitination following proteasome and deubiquitinase inhibition.
Udeshi ND, Mani DR, Eisenhaure T, Mertins P, Jaffe JD, Clauser KR, Hacohen N, Carr SA.
Mol Cell Proteomics. 2012 May;11(5):148-59. [PMID: 22505724]
[8] Systems-wide analysis of ubiquitylation dynamics reveals a key role for PAF15 ubiquitylation in DNA-damage bypass.
Povlsen LK, Beli P, Wagner SA, Poulsen SL, Sylvestersen KB, Poulsen JW, Nielsen ML, Bekker-Jensen S, Mailand N, Choudhary C.
Nat Cell Biol. 2012 Oct;14(10):1089-98. [PMID: 23000965]
[9] hCKSAAP_UbSite: improved prediction of human ubiquitination sites by exploiting amino acid pattern and properties.
Chen Z, Zhou Y, Song J, Zhang Z.
Biochim Biophys Acta. 2013 Aug;1834(8):1461-7. [PMID: 23603789]

Functional Description

Component of the SIN3-repressing complex. Enhances the ability of SIN3-HDAC1-mediated transcriptional repression. When tethered to the promoter, it can direct the formation of a repressive complex to core histone proteins. Component of a splicing-dependent multiprotein exon junction complex (EJC) deposited at splice junction on mRNAs. The EJC is a dynamic structure consisting of a few core proteins and several more peripheral nuclear and cytoplasmic associated factors that join the complex only transiently either during EJC assembly or during subsequent mRNA metabolism.

MOD_RES 2 2 N-acetylalanine.

3D-structure; Acetylation; Complete proteome; Cytoplasm; Nucleus; Reference proteome; Repressor; Transcription; Transcription regulation.

UniProt (SWISSPROT/TrEMBL); GenBank; EMBL

GO:0005737; C:cytoplasm; IEA:UniProtKB-SubCell.
GO:0000118; C:histone deacetylase complex; TAS:ProtInc.
GO:0005886; C:plasma membrane; IDA:HPA.
GO:0003714; F:transcription corepressor activity; TAS:ProtInc.
GO:0006357; P:regulation of transcription from RNA polymerase II promoter; TAS:ProtInc.
GO:0006351; P:transcription, DNA-dependent; IEA:UniProtKB-KW.

IPR017250; Hist_deAcase_cplx_SAP18.
IPR010516; SAP18.