Cofactor of BRCA1

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Identifiers
Aliases
External IDs	GeneCards: [1]
Orthologs
Species	Human	Mouse
Entrez	n/a	n/a
Ensembl	n/a	n/a
UniProt	n/a	n/a
RefSeq (mRNA)	n/a	n/a
RefSeq (protein)	n/a	n/a
Location (UCSC)	n/a	n/a
PubMed search	n/a	n/a
Wikidata
View/Edit Human

Cofactor of BRCA1, also known as COBRA1, is a human gene that encodes NELF-B.

Function

NELF-B is a subunit of negative elongation factor (NELF), which also includes NELF-A (WHSC2; MIM 606026), either NELF-C or NELF-D (TH1L; MIM 605297), and NELF-E (RDBP; MIM 154040). NELF acts with DRB sensitivity-inducing factor (DSIF), a heterodimer of SPT4 (SUPT4H1; MIM 603555) and SPT5 (SUPT5H; MIM 602102), to cause transcriptional pausing of RNA polymerase II (see MIM 180660). COBRA1 was initially identified in a yeast two-hybrid screen using the BRCT1 domain of BRCA1 as bait.

Interactions

Cofactor of BRCA1 has been shown to interact with:

• BRCA1
• C-Fos,
• C-jun,
• Estrogen receptor alpha,
• RDBP, and
• TH1L.

Further reading

• Stevens M, De Clercq E, Balzarini J (2007). "The regulation of HIV-1 transcription: molecular targets for chemotherapeutic intervention". Med Res Rev. 26 (5): 595–625. doi:10.1002/med.20081. PMID 16838299.
• Yamaguchi Y, Takagi T, Wada T, Yano K, Furuya A, Sugimoto S, Hasegawa J, Handa H (1999). "NELF, a multisubunit complex containing RD, cooperates with DSIF to repress RNA polymerase II elongation". Cell. 97 (1): 41–51. doi:10.1016/S0092-8674(00)80713-8. PMID 10199401.
• Hirosawa M, Nagase T, Ishikawa K, Kikuno R, Nomura N, Ohara O (2000). "Characterization of cDNA clones selected by the GeneMark analysis from size-fractionated cDNA libraries from human brain". DNA Res. 6 (5): 329–36. doi:10.1093/dnares/6.5.329. PMID 10574461.
• Hartley JL, Temple GF, Brasch MA (2001). "DNA Cloning Using In Vitro Site-Specific Recombination". Genome Res. 10 (11): 1788–95. doi:10.1101/gr.143000. PMC 310948. PMID 11076863.
• Ping YH, Rana TM (2001). "DSIF and NELF interact with RNA polymerase II elongation complex and HIV-1 Tat stimulates P-TEFb-mediated phosphorylation of RNA polymerase II and DSIF during transcription elongation". J. Biol. Chem. 276 (16): 12951–8. doi:10.1074/jbc.M006130200. PMID 11112772.
• Wiemann S, Weil B, Wellenreuther R, Gassenhuber J, Glassl S, Ansorge W, Böcher M, Blöcker H, Bauersachs S, Blum H, Lauber J, Düsterhöft A, Beyer A, Köhrer K, Strack N, Mewes HW, Ottenwälder B, Obermaier B, Tampe J, Heubner D, Wambutt R, Korn B, Klein M, Poustka A (2001). "Toward a Catalog of Human Genes and Proteins: Sequencing and Analysis of 500 Novel Complete Protein Coding Human cDNAs". Genome Res. 11 (3): 422–35. doi:10.1101/gr.GR1547R. PMC 311072. PMID 11230166.
• Simpson JC, Wellenreuther R, Poustka A, Pepperkok R, Wiemann S (2001). "Systematic subcellular localization of novel proteins identified by large-scale cDNA sequencing". EMBO Rep. 1 (3): 287–92. doi:10.1093/embo-reports/kvd058. PMC 1083732. PMID 11256614.
• Ye Q, Hu YF, Zhong H, Nye AC, Belmont AS, Li R (2002). "BRCA1-induced large-scale chromatin unfolding and allele-specific effects of cancer-predisposing mutations". J. Cell Biol. 155 (6): 911–21. doi:10.1083/jcb.200108049. PMC 2150890. PMID 11739404.
• Narita T, Yamaguchi Y, Yano K, Sugimoto S, Chanarat S, Wada T, Kim DK, Hasegawa J, Omori M, Inukai N, Endoh M, Yamada T, Handa H (2003). "Human Transcription Elongation Factor NELF: Identification of Novel Subunits and Reconstitution of the Functionally Active Complex". Mol. Cell. Biol. 23 (6): 1863–73. doi:10.1128/MCB.23.6.1863-1873.2003. PMC 149481. PMID 12612062.
• Lehner B, Semple JI, Brown SE, Counsell D, Campbell RD, Sanderson CM (2004). "Analysis of a high-throughput yeast two-hybrid system and its use to predict the function of intracellular proteins encoded within the human MHC class III region". Genomics. 83 (1): 153–67. doi:10.1016/S0888-7543(03)00235-0. PMID 14667819.
• Zhu J, Song S, Jiang Z, Yan J, Lu Q, Huang C, Ye Q (2005). "Characterization of COBRA1 in human breast cancer cell lines using a new polyclonal antibody against COBRA1". IUBMB Life. 56 (3): 161–6. doi:10.1080/15216540410001699826. PMID 15185750.
• Beausoleil SA, Jedrychowski M, Schwartz D, Elias JE, Villén J, Li J, Cohn MA, Cantley LC, Gygi SP (2004). "Large-scale characterization of HeLa cell nuclear phosphoproteins". Proc. Natl. Acad. Sci. U.S.A. 101 (33): 12130–5. doi:10.1073/pnas.0404720101. PMC 514446. PMID 15302935.
• Aiyar SE, Sun JL, Blair AL, Moskaluk CA, Lu YZ, Ye QN, Yamaguchi Y, Mukherjee A, Ren DM, Handa H, Li R (2004). "Attenuation of estrogen receptor α-mediated transcription through estrogen-stimulated recruitment of a negative elongation factor". Genes Dev. 18 (17): 2134–46. doi:10.1101/gad.1214104. PMC 515291. PMID 15342491.
• Wiemann S, Arlt D, Huber W, Wellenreuther R, Schleeger S, Mehrle A, Bechtel S, Sauermann M, Korf U, Pepperkok R, Sültmann H, Poustka A (2004). "From ORFeome to Biology: A Functional Genomics Pipeline". Genome Res. 14 (10B): 2136–44. doi:10.1101/gr.2576704. PMC 528930. PMID 15489336.
• Zhong H, Zhu J, Zhang H, Ding L, Sun Y, Huang C, Ye Q (2005). "COBRA1 inhibits AP-1 transcriptional activity in transfected cells". Biochem. Biophys. Res. Commun. 325 (2): 568–73. doi:10.1016/j.bbrc.2004.10.079. PMID 15530430.
• Mehrle A, Rosenfelder H, Schupp I, del Val C, Arlt D, Hahne F, Bechtel S, Simpson J, Hofmann O, Hide W, Glatting KH, Huber W, Pepperkok R, Poustka A, Wiemann S (2006). "The LIFEdb database in 2006". Nucleic Acids Res. 34 (Database issue): D415–8. doi:10.1093/nar/gkj139. PMC 1347501. PMID 16381901.
• McChesney PA, Aiyar SE, Lee OJ, Zaika A, Moskaluk C, Li R, El-Rifai W (2006). "Cofactor of BRCA1: a novel transcription factor regulator in upper gastrointestinal adenocarcinomas". Cancer Res. 66 (3): 1346–53. doi:10.1158/0008-5472.CAN-05-3593. PMID 16452188.