PPP2R1A
PPP2R1A
Enzyme
Serine/threonine-protein phosphatase 2A 65 kDa regulatory subunit A alpha isoform is an enzyme that in humans is encoded by the PPP2R1A gene.[5] In the plant Arabidopsis thaliana a similar enzyme is encoded by the RCN1 gene (At1g25490).[6]
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This gene encodes a constant regulatory subunit of protein phosphatase 2. 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 constant regulatory subunit A serves as a scaffolding molecule to coordinate the assembly of the catalytic subunit and a variable regulatory B subunit. This gene encodes an alpha isoform of the constant regulatory subunit A.[7]
PPP2R1A has been shown to interact with:
RCN1 At1g25490 is one of three genes in Arabidopsis encoding Phosphoprotein Phosphatase 2A Regulatory Subunit A (PP2Aa). The association of different b subunits with a PP2Aa-PP2ac dimer is believed to determine substrate specificity.
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- Hemmings BA, Adams-Pearson C, Maurer F, Mueller P, Goris J, Merlevede W, Hofsteenge J, Stone SR (1990). "alpha- and beta-forms of the 65-kDa subunit of protein phosphatase 2A have a similar 39 amino acid repeating structure". Biochemistry. 29 (13): 3166–3173. doi:10.1021/bi00465a002. PMID 2159327.
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- 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): 432–443. doi:10.1006/viro.1997.8873. PMID 9400615.
- Ruediger R, Fields K, Walter G (1999). "Binding specificity of protein phosphatase 2A core enzyme for regulatory B subunits and T antigens". J. Virol. 73 (1): 839–42. doi:10.1128/JVI.73.1.839-842.1999. PMC 103900. PMID 9847399.
- Groves MR, Hanlon N, Turowski P, Hemmings BA, Barford D (1999). "The structure of the protein phosphatase 2A PR65/A subunit reveals the conformation of its 15 tandemly repeated HEAT motifs". Cell. 96 (1): 99–110. doi:10.1016/S0092-8674(00)80963-0. PMID 9989501. S2CID 14465060.
- Hong Y, Sarge KD (1999). "Regulation of protein phosphatase 2A activity by heat shock transcription factor 2". J. Biol. Chem. 274 (19): 12967–12970. doi:10.1074/jbc.274.19.12967. PMID 10224043.
- Yan Z, Fedorov SA, Mumby MC, Williams RS (2000). "PR48, a novel regulatory subunit of protein phosphatase 2A, interacts with Cdc6 and modulates DNA replication in human cells". Mol. Cell. Biol. 20 (3): 1021–1029. doi:10.1128/MCB.20.3.1021-1029.2000. PMC 85219. PMID 10629059.
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- Lubert EJ, Hong Y, Sarge KD (2001). "Interaction between protein phosphatase 5 and the A subunit of protein phosphatase 2A: evidence for a heterotrimeric form of protein phosphatase 5". J. Biol. Chem. 276 (42): 38582–38587. doi:10.1074/jbc.M106906200. PMID 11504734.
- Elder RT, Yu M, Chen M, Zhu X, Yanagida M, Zhao Y (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): 359–370. doi:10.1006/viro.2001.1007. PMID 11531413.
- Li X, Virshup DM (2002). "Two conserved domains in regulatory B subunits mediate binding to the A subunit of protein phosphatase 2A". Eur. J. Biochem. 269 (2): 546–552. doi:10.1046/j.0014-2956.2001.02680.x. PMID 11856313.