Aliases for PPP2R2B Gene
- Protein Phosphatase 2, Regulatory Subunit B, Beta 2 3
- Protein Phosphatase 2 (Formerly 2A), Regulatory Subunit B (PR 52), Beta Isoform 2 3
- Protein Phosphatase 2 (Formerly 2A), Regulatory Subunit B, Beta Isoform 2 3
- PP2A Subunit B Isoform PR55-Beta 3 4
- PP2A Subunit B Isoform B55-Beta 3 4
- PP2A Subunit B Isoform R2-Beta 3 4
- PP2A Subunit B Isoform Beta 2 4
- Serine/Threonine Protein Phosphatase 2A, 55 KDa Regulatory Subunit B, Beta Isoform 3
- Serine/Threonine-Protein Phosphatase 2A 55 KDa Regulatory Subunit B Beta Isoform 3
- Serine/Threonine Protein Phosphatase 2A, Neuronal Isoform 3
- PP2A, Subunit B, B-Beta Isoform 3
- Spinocerebellar Ataxia 12 2
- PP2APR55BETA 3
External Ids for PPP2R2B Gene
Previous Symbols for PPP2R2B Gene
The product of this gene belongs to the phosphatase 2 regulatory 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 this gene cause autosomal dominant spinocerebellar ataxia 12 (SCA12), a disease caused by degeneration of the cerebellum, sometimes involving the brainstem and spinal cord, and in resulting in poor coordination of speech and body movements. Multiple alternatively spliced variants, which encode different isoforms, have been identified for this gene. The 5' UTR of some of these variants includes a CAG trinucleotide repeat sequence (7-28 copies) that can be expanded to 66-78 copies in cases of SCA12. [provided by RefSeq, Jul 2008]
GeneCards Summary for PPP2R2B Gene
PPP2R2B (Protein Phosphatase 2, Regulatory Subunit B, Beta) is a Protein Coding gene. Diseases associated with PPP2R2B include spinocerebellar ataxia type12 and spinocerebellar ataxia 12. Among its related pathways are PI3K-Akt signaling pathway and TGF-Beta Pathway. GO annotations related to this gene include protein complex binding and protein phosphatase type 2A regulator activity. An important paralog of this gene is PPP2R2C.
UniProtKB/Swiss-Prot for PPP2R2B Gene
The B regulatory subunit might modulate substrate selectivity and catalytic activity, and also might direct the localization of the catalytic enzyme to a particular subcellular compartment. Within the PP2A holoenzyme complex, isoform 2 is required to promote proapoptotic activity (By similarity). Isoform 2 regulates neuronal survival through the mitochondrial fission and fusion balance (By similarity).
Protein ser/thr phosphatases are a group of enzymes that catalyze the removal of phosphate groups from serine and/or threonine residues by the hydrolysis of phosphoric acid monoesters. They directly oppose the actions of kinases and phosphorylases and therefore play an integral role in many signal transduction pathways. There are two groups of serine/threonine phosphatases; phosphoprotein phosphatases (e.g. PP1, calcineurin), which are sensitive to okadaic acid and metallo-phosphatases (e.g. PP2C), which require a divalent cation, commonly Mg2+, for catalytic activity. Dephosphorylation, depending on the residue that the phosphate group is removed from, can have a stimulatory or inhibitory effect on the target molecule. This makes protein Ser/Thr phosphatases essential for many signal transduction pathways. Protein Ser/Thr phosphatase are regulated by their subcellular localization and by inhibitor proteins, which are subtype-specific.