POLR2B

POLR2B
Available structures PDB Ortholog search: PDBe RCSB List of PDB id codes 5IY9, 5IYA, 5IYC, 5IYB, 5IY7, 5IY8, 5IYD, 5IY6
Identifiers
Aliases	POLR2B , POL2RB, RPB2, hRPB140, hsRPB2, polymerase (RNA) II subunit B, RNA polymerase II subunit B
External IDs	OMIM: 180661 MGI: 2388280 HomoloGene: 722 GeneCards: POLR2B
Gene location (Human) Chr. Chromosome 4 (human) [1] Band 4q12 Start 56,977,722 bp [1] End 57,031,158 bp [1]
Gene location (Mouse) Chr. Chromosome 5 (mouse) [2] Band 5|5 C3.3 Start 77,457,994 bp [2] End 77,497,171 bp [2]
RNA expression pattern Bgee Human Mouse (ortholog) Top expressed in germinal epithelium endothelial cell middle temporal gyrus tibia human penis Brodmann area 23 parietal pleura Achilles tendon urethra synovial joint Top expressed in saccule otic placode primitive streak hair follicle ciliary body ureter medullary collecting duct retinal pigment epithelium trigeminal ganglion iris More reference expression data BioGPS More reference expression data
Gene ontology Molecular function transferase activity DNA binding nucleotidyltransferase activity ribonucleoside binding RNA polymerase II activity chromatin binding metal ion binding DNA-directed 5'-3' RNA polymerase activity protein binding RNA binding Cellular component membrane RNA polymerase II, core complex nucleus nucleoplasm Biological process mRNA splicing, via spliceosome somatic stem cell population maintenance transcription elongation from RNA polymerase II promoter 7-methylguanosine mRNA capping transcription by RNA polymerase II positive regulation of viral transcription transcription-coupled nucleotide-excision repair transcription initiation from RNA polymerase II promoter snRNA transcription by RNA polymerase II fibroblast growth factor receptor signaling pathway transcription, DNA-templated RNA metabolic process regulation of gene silencing by miRNA Sources:Amigo / QuickGO
Orthologs Species Human Mouse Entrez 5431 231329 Ensembl ENSG00000047315 ENSMUSG00000029250 UniProt P30876 Q8CFI7 RefSeq (mRNA) NM_001303269 NM_000938 NM_001303268 NM_153798 RefSeq (protein) NP_000929 NP_001290197 NP_001290198 NP_722493 Location (UCSC) Chr 4: 56.98 – 57.03 Mb Chr 5: 77.46 – 77.5 Mb PubMed search [3] [4]
Wikidata
View/Edit Human View/Edit Mouse

DNA-directed RNA polymerase II subunit RPB2 is an enzyme that in humans is encoded by the POLR2B gene. ^{[5] [6]}

This gene encodes the second largest subunit of RNA polymerase II, the polymerase responsible for synthesizing messenger RNA in eukaryotes. This subunit, in combination with at least two other polymerase subunits, forms a structure within the polymerase that maintains contact in the active site of the enzyme between the DNA template and the newly synthesized RNA. ^[7]

Interactions

POLR2B has been shown to interact with POLR2C, ^[8] POLR2E, ^[8] POLR2H ^[8] and POLR2L. ^[8]

References

1. GRCh38: Ensembl release 89: ENSG00000047315 - Ensembl, May 2017
2. GRCm38: Ensembl release 89: ENSMUSG00000029250 - 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. Acker J, Wintzerith M, Vigneron M, et al. (October 1992). "Primary structure of the second largest subunit of human RNA polymerase II (or B)". J Mol Biol. 226 (4): 1295–9. doi:10.1016/0022-2836(92)91071-V. PMID   1518060.
6. Acker J, Mattei MG, Wintzerith M, et al. (August 1994). "Chromosomal localization of human RNA polymerase II subunit genes". Genomics. 20 (3): 496–9. doi:10.1006/geno.1994.1208. PMID   8034326.
7. "Entrez Gene: POLR2B polymerase (RNA) II (DNA directed) polypeptide B, 140kDa".
8. Acker J, de Graaff M, Cheynel I, et al. (July 1997). "Interactions between the human RNA polymerase II subunits". J. Biol. Chem. 272 (27). UNITED STATES: 16815–21. doi: 10.1074/jbc.272.27.16815 . ISSN   0021-9258. PMID   9201987.

Further reading

• Jeang KT (1998). "Tat, Tat-associated kinase, and transcription". J. Biomed. Sci. 5 (1): 24–7. doi:10.1007/BF02253352. PMID   9570510.
• Yankulov K, Bentley D (1998). "Transcriptional control: Tat cofactors and transcriptional elongation". Curr. Biol. 8 (13): R447–9. Bibcode:1998CBio....8.R447Y. doi: 10.1016/S0960-9822(98)70289-1 . PMID   9651670. S2CID   15480646.
• Romano G, Kasten M, De Falco G, et al. (2000). "Regulatory functions of Cdk9 and of cyclin T1 in HIV tat transactivation pathway gene expression". J. Cell. Biochem. 75 (3): 357–68. doi:10.1002/(SICI)1097-4644(19991201)75:3<357::AID-JCB1>3.0.CO;2-K. PMID   10536359. S2CID   43685090.
• Marcello A, Zoppé M, Giacca M (2002). "Multiple modes of transcriptional regulation by the HIV-1 Tat transactivator". IUBMB Life. 51 (3): 175–81. doi: 10.1080/152165401753544241 . PMID   11547919. S2CID   10931640.
• 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. PMC   7168390 . PMID   16838299.
• Harrich D, McMillan N, Munoz L, et al. (2007). "Will diverse Tat interactions lead to novel antiretroviral drug targets?". Current Drug Targets. 7 (12): 1595–606. doi:10.2174/138945006779025338. PMID   17168834.
• Kato H, Sumimoto H, Pognonec P, et al. (1992). "HIV-1 Tat acts as a processivity factor in vitro in conjunction with cellular elongation factors". Genes Dev. 6 (4): 655–66. doi: 10.1101/gad.6.4.655 . PMID   1559613.
• Southgate C, Zapp ML, Green MR (1990). "Activation of transcription by HIV-1 Tat protein tethered to nascent RNA through another protein". Nature. 345 (6276): 640–2. Bibcode:1990Natur.345..640S. doi:10.1038/345640a0. PMID   2190099. S2CID   4233742.
• Zheng XM, Black D, Chambon P, et al. (1990). "Sequencing and expression of complementary DNA for the general transcription factor BTF3". Nature. 344 (6266): 556–9. Bibcode:1990Natur.344..556Z. doi:10.1038/344556a0. PMID   2320128. S2CID   4227320.
• Wu-Baer F, Sigman D, Gaynor RB (1995). "Specific binding of RNA polymerase II to the human immunodeficiency virus trans-activating region RNA is regulated by cellular cofactors and Tat". Proc. Natl. Acad. Sci. U.S.A. 92 (16): 7153–7. Bibcode:1995PNAS...92.7153W. doi: 10.1073/pnas.92.16.7153 . PMC   41297 . PMID   7638159.
• Herrmann CH, Rice AP (1995). "Lentivirus Tat proteins specifically associate with a cellular protein kinase, TAK, that hyperphosphorylates the carboxyl-terminal domain of the large subunit of RNA polymerase II: candidate for a Tat cofactor". J. Virol. 69 (3): 1612–20. doi:10.1128/JVI.69.3.1612-1620.1995. PMC   188757 . PMID   7853496.
• Andersson B, Wentland MA, Ricafrente JY, et al. (1996). "A "double adaptor" method for improved shotgun library construction". Anal. Biochem. 236 (1): 107–13. doi:10.1006/abio.1996.0138. PMID   8619474.
• Keen NJ, Gait MJ, Karn J (1996). "Human immunodeficiency virus type-1 Tat is an integral component of the activated transcription-elongation complex". Proc. Natl. Acad. Sci. U.S.A. 93 (6): 2505–10. Bibcode:1996PNAS...93.2505K. doi: 10.1073/pnas.93.6.2505 . PMC   39827 . PMID   8637904.
• Yang X, Herrmann CH, Rice AP (1996). "The human immunodeficiency virus Tat proteins specifically associate with TAK in vivo and require the carboxyl-terminal domain of RNA polymerase II for function". J. Virol. 70 (7): 4576–84. doi:10.1128/JVI.70.7.4576-4584.1996. PMC   190394 . PMID   8676484.
• Agostini I, Navarro JM, Rey F, et al. (1996). "The human immunodeficiency virus type 1 Vpr transactivator: cooperation with promoter-bound activator domains and binding to TFIIB". J. Mol. Biol. 261 (5): 599–606. doi:10.1006/jmbi.1996.0485. PMID   8800208.
• Zhou Q, Sharp PA (1996). "Tat-SF1: cofactor for stimulation of transcriptional elongation by HIV-1 Tat". Science. 274 (5287): 605–10. Bibcode:1996Sci...274..605Z. doi:10.1126/science.274.5287.605. PMID   8849451. S2CID   13266489.
• Okamoto H, Sheline CT, Corden JL, et al. (1996). "Trans-activation by human immunodeficiency virus Tat protein requires the C-terminal domain of RNA polymerase II". Proc. Natl. Acad. Sci. U.S.A. 93 (21): 11575–9. Bibcode:1996PNAS...9311575O. doi: 10.1073/pnas.93.21.11575 . PMC   38099 . PMID   8876177.
• Chun RF, Jeang KT (1996). "Requirements for RNA polymerase II carboxyl-terminal domain for activated transcription of human retroviruses human T-cell lymphotropic virus I and HIV-1". J. Biol. Chem. 271 (44): 27888–94. doi: 10.1074/jbc.271.44.27888 . PMID   8910388.