PIK3R2 Antibody – Rabbit Polyclonal

Phosphatidylinositol 3-kinase (PI3K) is a lipid kinase that phosphorylates phosphatidylinositol and similar compounds, creating second messengers important in growth signaling pathways. PI3K functions as a heterodimer of a regulatory and a catalytic subunit. The protein encoded by this gene is a regulatory component of PI3K. Two transcript variants, one protein coding and the other non-protein coding, have been found for this gene. [provided by RefSeq, Dec 2012]

Function: Binds to activated (phosphorylated) protein-tyrosine kinases, through its SH2 domain, and acts as an adapter, mediating the association of the p110 catalytic unit to the plasma membrane.

Subunit structure: Heterodimer of a regulatory subunit PIK3R2 and a p110 catalytic subunit (PIK3CA, PIK3CB or PIK3CD). Interacts with AXL. Interacts with FLT1 (tyrosine-phosphorylated) and FLT4 (tyrosine-phosphorylated). Interacts with NYAP1, NYAP2 and MYO16. Ref.5 Ref.6 Ref.7

Post-translational modification: Phosphorylated in response to signaling from activated receptor-type protein kinases. Dephosphorylated by PTPRJ. Ref.8

Involvement in disease: Megalencephaly-polymicrogyria-polydactyly-hydrocephalus syndrome (MPPH) [MIM:603387]: A syndrome characterized by megalencephaly, hydrocephalus, and polymicrogyria; polydactyly may also be seen. There is considerable phenotypic similarity between this disorder and the megalencephaly-capillary malformation syndrome.Note: The disease is caused by mutations affecting the gene represented in this entry. Ref.14

Sequence similarities: Belongs to the PI3K p85 subunit family.Contains 1 Rho-GAP domain.Contains 2 SH2 domains.Contains 1 SH3 domain.