SSR1

Translocon-associated protein subunit alpha is a protein that in humans is encoded by the SSR1 gene.[5]

SSR1
Identifiers
Aliases	SSR1, TRAPA, signal sequence receptor subunit 1
External IDs	OMIM: 600868 MGI: 105082 HomoloGene: 2368 GeneCards: SSR1
Gene location (Human) Chr. Chromosome 6 (human)[1] Band 6p24.3 Start 7,268,306 bp[1] End 7,347,446 bp[1]
Gene location (Mouse) Chr. Chromosome 13 (mouse)[2] Band 13|13 A3.3 Start 37,966,605 bp[2] End 37,994,217 bp[2]
RNA expression pattern More reference expression data
Gene ontology Molecular function • GO:0001948 protein binding Cellular component • integral component of membrane • endoplasmic reticulum membrane • membrane • endoplasmic reticulum Biological process • IRE1-mediated unfolded protein response • cotranslational protein targeting to membrane • positive regulation of cell proliferation Sources:Amigo / QuickGO
Orthologs
Species	Human	Mouse
Entrez	6745	107513
Ensembl	ENSG00000124783	ENSMUSG00000021427
UniProt	P43307	Q9CY50
RefSeq (mRNA)	NM_001292008 NM_003144	NM_025965 NM_001360842
RefSeq (protein)	NP_001278937 NP_003135	NP_080241 NP_001347771
Location (UCSC)	Chr 6: 7.27 – 7.35 Mb	Chr 13: 37.97 – 37.99 Mb
PubMed search	[3]	[4]
Wikidata
View/Edit Human View/Edit Mouse

The signal sequence receptor (SSR) is a glycosylated endoplasmic reticulum (ER) membrane receptor associated with protein translocation across the ER membrane. The SSR consists of 2 subunits, a 34-kD glycoprotein encoded by this gene and a 22-kD glycoprotein. This gene generates several mRNA species as a result of complex alternative polyadenylation. This gene is unusual in that it utilizes arrays of polyA signal sequences that are exclusively non-canonical.[5]

References

1. GRCh38: Ensembl release 89: ENSG00000124783 - Ensembl, May 2017
2. GRCm38: Ensembl release 89: ENSMUSG00000021427 - Ensembl, May 2017
3. "Human PubMed Reference:". National Center for Biotechnology Information, U.S. National Library of Medicine.
4. "Mouse PubMed Reference:". National Center for Biotechnology Information, U.S. National Library of Medicine.
5. "Entrez Gene: SSR1 signal sequence receptor, alpha (translocon-associated protein alpha)".

Further reading

• Wei ML, Cresswell P (1992). "HLA-A2 molecules in an antigen-processing mutant cell contain signal sequence-derived peptides". Nature. 356 (6368): 443–6. doi:10.1038/356443a0. PMID 1557127.
• Vogel F, Hartmann E, Görlich D, Rapoport TA (1991). "Segregation of the signal sequence receptor protein in the rough endoplasmic reticulum membrane". Eur. J. Cell Biol. 53 (2): 197–202. PMID 1964414.
• Hartmann E, Görlich D, Kostka S, et al. (1993). "A tetrameric complex of membrane proteins in the endoplasmic reticulum" (PDF). Eur. J. Biochem. 214 (2): 375–81. doi:10.1111/j.1432-1033.1993.tb17933.x. hdl:11858/00-001M-0000-0015-3BD2-F. PMID 7916687.
• Hartmann E, Prehn S (1994). "The N-terminal region of the alpha-subunit of the TRAP complex has a conserved cluster of negative charges". FEBS Lett. 349 (3): 324–6. doi:10.1016/0014-5793(94)00693-8. PMID 8050590.
• Maruyama K, Sugano S (1994). "Oligo-capping: a simple method to replace the cap structure of eukaryotic mRNAs with oligoribonucleotides". Gene. 138 (1–2): 171–4. doi:10.1016/0378-1119(94)90802-8. PMID 8125298.
• Hu T, Guan T, Gerace L (1996). "Molecular and functional characterization of the p62 complex, an assembly of nuclear pore complex glycoproteins". J. Cell Biol. 134 (3): 589–601. doi:10.1083/jcb.134.3.589. PMC 2120945. PMID 8707840.
• Suzuki Y, Yoshitomo-Nakagawa K, Maruyama K, et al. (1997). "Construction and characterization of a full length-enriched and a 5'-end-enriched cDNA library". Gene. 200 (1–2): 149–56. doi:10.1016/S0378-1119(97)00411-3. PMID 9373149.
• Hirama T, Miller CW, Koeffler HP (1999). "Translocon-associated protein alpha transcripts are induced by granulocyte-macrophage colony-stimulating factor and exhibit complex alternative polyadenylation". FEBS Lett. 455 (3): 223–7. doi:10.1016/S0014-5793(99)00885-6. PMID 10437777.
• Wang L, Dobberstein B (1999). "Oligomeric complexes involved in translocation of proteins across the membrane of the endoplasmic reticulum". FEBS Lett. 457 (3): 316–22. doi:10.1016/S0014-5793(99)01075-3. PMID 10471800.
• Strausberg RL, Feingold EA, Grouse LH, et al. (2003). "Generation and initial analysis of more than 15,000 full-length human and mouse cDNA sequences". Proc. Natl. Acad. Sci. U.S.A. 99 (26): 16899–903. doi:10.1073/pnas.242603899. PMC 139241. PMID 12477932.
• Zhang H, Li XJ, Martin DB, Aebersold R (2003). "Identification and quantification of N-linked glycoproteins using hydrazide chemistry, stable isotope labeling and mass spectrometry". Nat. Biotechnol. 21 (6): 660–6. doi:10.1038/nbt827. PMID 12754519.
• Mungall AJ, Palmer SA, Sims SK, et al. (2003). "The DNA sequence and analysis of human chromosome 6". Nature. 425 (6960): 805–11. doi:10.1038/nature02055. PMID 14574404.
• Gerhard DS, Wagner L, Feingold EA, et al. (2004). "The status, quality, and expansion of the NIH full-length cDNA project: the Mammalian Gene Collection (MGC)". Genome Res. 14 (10B): 2121–7. doi:10.1101/gr.2596504. PMC 528928. PMID 15489334.
• Stelzl U, Worm U, Lalowski M, et al. (2005). "A human protein-protein interaction network: a resource for annotating the proteome". Cell. 122 (6): 957–68. doi:10.1016/j.cell.2005.08.029. hdl:11858/00-001M-0000-0010-8592-0. PMID 16169070.
• Otsuki T, Ota T, Nishikawa T, et al. (2007). "Signal sequence and keyword trap in silico for selection of full-length human cDNAs encoding secretion or membrane proteins from oligo-capped cDNA libraries". DNA Res. 12 (2): 117–26. doi:10.1093/dnares/12.2.117. PMID 16303743.
• Olsen JV, Blagoev B, Gnad F, et al. (2006). "Global, in vivo, and site-specific phosphorylation dynamics in signaling networks". Cell. 127 (3): 635–48. doi:10.1016/j.cell.2006.09.026. PMID 17081983.