POU2AF1

POU class 2 associating factor 1
PDB rendering based on 1cqt.
Available structures PDB Ortholog search: PDBe, RCSB List of PDB id codes 1CQT​
Identifiers
Symbols	POU2AF1 ; BOB1; OBF-1; OBF1; OCAB
External IDs	OMIM: 601206 MGI: 105086 HomoloGene: 4543 GeneCards: POU2AF1 Gene
Gene ontology Molecular function • DNA binding • transcription cofactor activity • transcription coactivator activity • protein binding Cellular component • nucleus Biological process • regulation of transcription, DNA-templated • transcription from RNA polymerase II promoter • humoral immune response Sources: Amigo / QuickGO
RNA expression pattern
More reference expression data
Orthologs
Species	Human	Mouse
Entrez	5450	18985
Ensembl	ENSG00000110777	ENSMUSG00000032053
UniProt	Q16633	Q64693
RefSeq (mRNA)	NM_006235	NM_011136
RefSeq (protein)	NP_006226	NP_035266
Location (UCSC)	Chr 11: 111.35 – 111.46 Mb	Chr 9: 51.21 – 51.24 Mb
PubMed search

POU domain class 2-associating factor 1 is a protein that in humans is encoded by the POU2AF1 gene.^[1][2]

Interactions

POU2AF1 has been shown to interact with:

• POU2F1^[3][4][5] and
• SIAH1.^[6]

References

1. Junker S, Brøndum-Nielsen K, Newell JW, Matthias P, Tommerup N (Jun 1996). "Assignment of the human gene for Oct-binding factor-1 (OBF1), a B-cell-specific coactivator of octamer-binding transcription factors 1 and 2, to 11q23.1 by somatic cell hybridization and in situ hybridization". Genomics 33 (1): 143–5. doi:10.1006/geno.1996.0173. PMID 8617501.
2. "Entrez Gene: POU2AF1 POU domain, class 2, associating factor 1".
3. Chasman D, Cepek K, Sharp PA, Pabo CO (Oct 1999). "Crystal structure of an OCA-B peptide bound to an Oct-1 POU domain/octamer DNA complex: specific recognition of a protein-DNA interface". Genes Dev. 13 (20): 2650–7. doi:10.1101/gad.13.20.2650. PMC 317104. PMID 10541551.
4. Wong MW, Henry RW, Ma B, Kobayashi R, Klages N, Matthias P, Strubin M, Hernandez N (Jan 1998). "The large subunit of basal transcription factor SNAPc is a Myb domain protein that interacts with Oct-1". Mol. Cell. Biol. 18 (1): 368–77. doi:10.1128/mcb.18.1.368. PMC 121507. PMID 9418884.
5. Lee L, Stollar E, Chang J, Grossmann JG, O'Brien R, Ladbury J, Carpenter B, Roberts S, Luisi B (Jun 2001). "Expression of the Oct-1 transcription factor and characterization of its interactions with the Bob1 coactivator". Biochemistry 40 (22): 6580–8. doi:10.1021/bi010095x. PMID 11380252.
6. Tiedt R, Bartholdy BA, Matthias G, Newell JW, Matthias P (Aug 2001). "The RING finger protein Siah-1 regulates the level of the transcriptional coactivator OBF-1". EMBO J. 20 (15): 4143–52. doi:10.1093/emboj/20.15.4143. PMC 149178. PMID 11483517.

Further reading

• Teitell MA (2004). "OCA-B regulation of B-cell development and function". Trends Immunol. 24 (10): 546–53. doi:10.1016/j.it.2003.08.002. PMID 14552839.
• Luo Y, Roeder RG (1995). "Cloning, functional characterization, and mechanism of action of the B-cell-specific transcriptional coactivator OCA-B". Mol. Cell. Biol. 15 (8): 4115–24. PMC 230650. PMID 7623806.
• Gstaiger M, Knoepfel L, Georgiev O, Schaffner W, Hovens CM (1995). "A B-cell coactivator of octamer-binding transcription factors". Nature 373 (6512): 360–2. doi:10.1038/373360a0. PMID 7779176.
• Strubin M, Newell JW, Matthias P (1995). "OBF-1, a novel B cell-specific coactivator that stimulates immunoglobulin promoter activity through association with octamer-binding proteins". Cell 80 (3): 497–506. doi:10.1016/0092-8674(95)90500-6. PMID 7859290.
• Galiègue-Zouitina S, Quief S, Hildebrand MP, Denis C, Lecocq G, Collyn-d'Hooghe M, Bastard C, Yuille M, Dyer MJ, Kerckaert JP (1996). "Fusion of the LAZ3/BCL6 and BOB1/OBF1 genes by t(3; 11) (q27; q23) chromosomal translocation". C. R. Acad. Sci. III, Sci. Vie 318 (11): 1125–31. PMID 8574789.
• Zwilling S, Dieckmann A, Pfisterer P, Angel P, Wirth T (1997). "Inducible expression and phosphorylation of coactivator BOB.1/OBF.1 in T cells". Science 277 (5323): 221–5. doi:10.1126/science.277.5323.221. PMID 9211847.
• Sauter P, Matthias P (1998). "The B cell-specific coactivator OBF-1 (OCA-B, Bob-1) is inducible in T cells and its expression is dispensable for IL-2 gene induction". Immunobiology 198 (1–3): 207–16. doi:10.1016/S0171-2985(97)80041-1. PMID 9442392.
• Luo Y, Ge H, Stevens S, Xiao H, Roeder RG (1998). "Coactivation by OCA-B: Definition of Critical Regions and Synergism with General Cofactors". Mol. Cell. Biol. 18 (7): 3803–10. PMC 108964. PMID 9632764.
• Sauter P, Matthias P (1998). "Coactivator OBF-1 Makes Selective Contacts with Both the POU-Specific Domain and the POU Homeodomain and Acts as a Molecular Clamp on DNA". Mol. Cell. Biol. 18 (12): 7397–409. PMC 109321. PMID 9819426.
• Chasman D, Cepek K, Sharp PA, Pabo CO (1999). "Crystal structure of an OCA-B peptide bound to an Oct-1 POU domain/octamer DNA complex: specific recognition of a protein-DNA interface". Genes Dev. 13 (20): 2650–7. doi:10.1101/gad.13.20.2650. PMC 317104. PMID 10541551.
• Tomilin A, Reményi A, Lins K, Bak H, Leidel S, Vriend G, Wilmanns M, Schöler HR (2001). "Synergism with the coactivator OBF-1 (OCA-B, BOB-1) is mediated by a specific POU dimer configuration". Cell 103 (6): 853–64. doi:10.1016/S0092-8674(00)00189-6. PMID 11136971.
• Lee L, Stollar E, Chang J, Grossmann JG, O'Brien R, Ladbury J, Carpenter B, Roberts S, Luisi B (2001). "Expression of the Oct-1 transcription factor and characterization of its interactions with the Bob1 coactivator". Biochemistry 40 (22): 6580–8. doi:10.1021/bi010095x. PMID 11380252.
• Tiedt R, Bartholdy BA, Matthias G, Newell JW, Matthias P (2001). "The RING finger protein Siah-1 regulates the level of the transcriptional coactivator OBF-1". EMBO J. 20 (15): 4143–52. doi:10.1093/emboj/20.15.4143. PMC 149178. PMID 11483517.
• Boehm J, He Y, Greiner A, Staudt L, Wirth T (2001). "Regulation of BOB.1/OBF.1 stability by SIAH". EMBO J. 20 (15): 4153–62. doi:10.1093/emboj/20.15.4153. PMC 149152. PMID 11483518.
• Malone CS, Wall R (2002). "Bob1 (OCA-B/OBF-1) differential transactivation of the B cell-specific B29 (Ig beta) and mb-1 (Ig alpha) promoters". J. Immunol. 168 (7): 3369–75. doi:10.4049/jimmunol.168.7.3369. PMID 11907094.
• Casellas R, Jankovic M, Meyer G, Gazumyan A, Luo Y, Roeder R, Nussenzweig M (2003). "OcaB is required for normal transcription and V(D)J recombination of a subset of immunoglobulin kappa genes". Cell 110 (5): 575–85. doi:10.1016/S0092-8674(02)00911-X. PMID 12230975.
• Schaffer A, Kim EC, Wu X, Zan H, Testoni L, Salamon S, Cerutti A, Casali P (2003). "Selective inhibition of class switching to IgG and IgE by recruitment of the HoxC4 and Oct-1 homeodomain proteins and Ku70/Ku86 to newly identified ATTT cis-elements". J. Biol. Chem. 278 (25): 23141–50. doi:10.1074/jbc.M212952200. PMID 12672812.
• Lins K, Reményi A, Tomilin A, Massa S, Wilmanns M, Matthias P, Schöler HR (2003). "OBF1 enhances transcriptional potential of Oct1". EMBO J. 22 (9): 2188–98. doi:10.1093/emboj/cdg199. PMC 156071. PMID 12727885.