Serine/threonine-protein phosphatase 2A 65 kDa regulatory subunit A alpha isoform

UniProtKB accession:  Q76MZ3

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UniProtKB description:  The PR65 subunit of protein phosphatase 2A serves as a scaffolding molecule to coordinate the assembly of the catalytic subunit and a variable regulatory B subunit (PubMed:10100624, PubMed:26974206). Upon interaction with GNA12 promotes dephosphorylation of microtubule associated protein TAU/MAPT (By similarity). Required for proper chromosome segregation and for centromeric localization of SGO1 in mitosis (By similarity). Together with RACK1 adapter, mediates dephosphorylation of AKT1 at 'Ser-473', preventing AKT1 activation and AKT-mTOR signaling pathway (PubMed:26974206, PubMed:33505023). Dephosphorylation of AKT1 is essential for regulatory T-cells (Treg) homeostasis and stability (PubMed:33505023).