PPP2R2B

Serine/threonine-protein phosphatase 2A 55 kDa regulatory subunit B beta isoform is an enzyme that in humans is encoded by the PPP2R2B gene.

PPP2R2B
Identifiers
Aliases	PPP2R2B, B55BETA, PP2AB55BETA, PP2ABBETA, PP2APR55B, PP2APR55BETA, PR2AB55BETA, PR2ABBETA, PR2APR55BETA, PR52B, PR55-BETA, PR55BETA, SCA12, protein phosphatase 2 regulatory subunit Bbeta
External IDs	OMIM: 604325; MGI: 1920180; HomoloGene: 55833; GeneCards: PPP2R2B; OMA:PPP2R2B - orthologs
Gene location (Human) Chr. Chromosome 5 (human) Band 5q32 Start 146,580,742 bp End 147,084,784 bp
Gene location (Mouse) Chr. Chromosome 18 (mouse) Band 18|18 B3 Start 42,770,497 bp End 43,216,192 bp
RNA expression pattern Bgee Human Mouse (ortholog) Top expressed in sperm ganglionic eminence prefrontal cortex caudate nucleus nucleus accumbens Brodmann area 23 putamen endothelial cell primary visual cortex dorsolateral prefrontal cortex Top expressed in entorhinal cortex perirhinal cortex neural layer of retina CA3 field primary motor cortex anterior amygdaloid area visual cortex primary visual cortex central gray substance of midbrain subiculum More reference expression data BioGPS More reference expression data
Gene ontology Molecular function protein binding protein serine/threonine phosphatase activity protein phosphatase regulator activity Cellular component cytoplasm mitochondrial outer membrane cytoskeleton membrane mitochondrion protein phosphatase type 2A complex cytosol Biological process apoptotic process mitotic cell cycle peptidyl-serine dephosphorylation developmental process regulation of phosphoprotein phosphatase activity Sources:Amigo / QuickGO
Orthologs Species Human Mouse Entrez 5521 72930 Ensembl ENSG00000156475 ENSMUSG00000024500 UniProt Q00005 Q6ZWR4 RefSeq (mRNA) NM_001271899 NM_001271900 NM_001271948 NM_181674 NM_181675 NM_181676 NM_181677 NM_181678 NM_027531 NM_028392 RefSeq (protein) NP_001258828 NP_001258829 NP_001258877 NP_858060 NP_858061 NP_858062 NP_858063 NP_858064 NP_082668 NP_081807 NP_001390894 Location (UCSC) Chr 5: 146.58 – 147.08 Mb Chr 18: 42.77 – 43.22 Mb PubMed search
Wikidata
View/Edit Human View/Edit Mouse

The product of this gene belongs to the phosphatase 2regulatory subunit B family. Protein phosphatase 2 is one of the four major Ser/Thr phosphatases, and it is implicated in the negative control of cell growth and division. It consists of a common heteromeric core enzyme, which is composed of a catalytic subunit and a constant regulatory subunit, that associates with a variety of regulatory subunits. The B regulatory subunit might modulate substrate selectivity and catalytic activity. This gene encodes a beta isoform of the regulatory subunit B55 subfamily. Defects in the 5' UTR of this gene may cause a rare form of autosomal dominant spinocerebellar ataxia 12.

Further reading

• Millward TA, Zolnierowicz S, Hemmings BA (1999). "Regulation of protein kinase cascades by protein phosphatase 2A". Trends Biochem. Sci. 24 (5): 186–91. doi:10.1016/S0968-0004(99)01375-4. PMID 10322434.
• Andersen JL, Planelles V (2005). "The role of Vpr in HIV-1 pathogenesis". Curr. HIV Res. 3 (1): 43–51. doi:10.2174/1570162052772988. PMID 15638722.
• Le Rouzic E, Benichou S (2006). "The Vpr protein from HIV-1: distinct roles along the viral life cycle". Retrovirology. 2: 11. doi:10.1186/1742-4690-2-11. PMC 554975. PMID 15725353.
• Zhao RY, Elder RT (2005). "Viral infections and cell cycle G2/M regulation". Cell Res. 15 (3): 143–9. doi:10.1038/sj.cr.7290279. PMID 15780175.
• Zhao RY, Bukrinsky M, Elder RT (2005). "HIV-1 viral protein R (Vpr) & host cellular responses". Indian J. Med. Res. 121 (4): 270–86. PMID 15817944.
• Schalling M, Hudson TJ, Buetow KH, Housman DE (1993). "Direct detection of novel expanded trinucleotide repeats in the human genome". Nat. Genet. 4 (2): 135–9. doi:10.1038/ng0693-135. PMID 8348150. S2CID 13281635.
• Tung HY, De Rocquigny H, Zhao LJ, et al. (1997). "Direct activation of protein phosphatase-2A0 by HIV-1 encoded protein complex NCp7:vpr". FEBS Lett. 401 (2–3): 197–201. doi:10.1016/S0014-5793(96)01470-6. PMID 9013886. S2CID 23293768.
• Ruediger R, Brewis N, Ohst K, Walter G (1998). "Increasing the ratio of PP2A core enzyme to holoenzyme inhibits Tat-stimulated HIV-1 transcription and virus production". Virology. 238 (2): 432–43. doi:10.1006/viro.1997.8873. PMID 9400615.
• Strack S, Zaucha JA, Ebner FF, et al. (1998). "Brain protein phosphatase 2A: developmental regulation and distinct cellular and subcellular localization by B subunits". J. Comp. Neurol. 392 (4): 515–27. doi:10.1002/(SICI)1096-9861(19980323)392:4<515::AID-CNE8>3.0.CO;2-3. PMID 9514514. S2CID 20496320.
• Fujigasaki H, Verma IC, Camuzat A, et al. (2001). "SCA12 is a rare locus for autosomal dominant cerebellar ataxia: a study of an Indian family". Ann. Neurol. 49 (1): 117–21. doi:10.1002/1531-8249(200101)49:1<117::AID-ANA19>3.0.CO;2-G. PMID 11198281. S2CID 20499068.
• Elder RT, Yu M, Chen M, et al. (2001). "HIV-1 Vpr induces cell cycle G2 arrest in fission yeast (Schizosaccharomyces pombe) through a pathway involving regulatory and catalytic subunits of PP2A and acting on both Wee1 and Cdc25". Virology. 287 (2): 359–70. doi:10.1006/viro.2001.1007. PMID 11531413.
• Guo CY, Brautigan DL, Larner JM (2002). "ATM-dependent dissociation of B55 regulatory subunit from nuclear PP2A in response to ionizing radiation". J. Biol. Chem. 277 (7): 4839–44. doi:10.1074/jbc.M110092200. PMID 11723136.
• Bennin DA, Don AS, Brake T, et al. (2002). "Cyclin G2 associates with protein phosphatase 2A catalytic and regulatory B' subunits in active complexes and induces nuclear aberrations and a G1/S phase cell cycle arrest". J. Biol. Chem. 277 (30): 27449–67. doi:10.1074/jbc.M111693200. PMID 11956189.
• Okamoto K, Li H, Jensen MR, et al. (2002). "Cyclin G recruits PP2A to dephosphorylate Mdm2". Mol. Cell. 9 (4): 761–71. doi:10.1016/S1097-2765(02)00504-X. PMID 11983168.
• Marmorstein LY, McLaughlin PJ, Stanton JB, et al. (2002). "Bestrophin interacts physically and functionally with protein phosphatase 2A". J. Biol. Chem. 277 (34): 30591–7. doi:10.1074/jbc.M204269200. PMID 12058047.
• Hrimech M, Yao XJ, Branton PE, Cohen EA (2002). "Human immunodeficiency virus type 1 Vpr-mediated G(2) cell cycle arrest: Vpr interferes with cell cycle signaling cascades by interacting with the B subunit of serine/threonine protein phosphatase 2A". EMBO J. 21 (14): 3918. doi:10.1093/emboj/cdf420. PMC 126131. PMID 12110603.

External links

• GeneReviews/NCBI/NIH/UW entry on Spinocerebellar Ataxia Type 12