FEATURES

FAMILY

DESCRIPTION

Also known as CANB1_HUMAN, PPP3R1, CNA2, CNB. Regulatory subunit of calcineurin, a calcium-dependent, calmodulin stimulated protein phosphatase. Confers calcium sensitivity. Forms a complex composed of a calmodulin-dependent catalytic subunit (also known as calcineurin A) and a regulatory Ca(2+)-binding subunit (also known as calcineurin B) (PubMed:8524402, PubMed:12218175, PubMed:12357034, PubMed:17498738, PubMed:22343722, PubMed:23468591, PubMed:26794871, PubMed:27974827). There are three catalytic subunits, each encoded by a separate gene (PPP3CA, PPP3CB, and PPP3CC) and two regulatory subunits which are also encoded by separate genes (PPP3R1 and PPP3R2). Interacts with catalytic subunit PPP3CA/calcineurin A (PubMed:8524402, PubMed:12218175, PubMed:12357034, PubMed:17498738, PubMed:22343722, PubMed:23468591, PubMed:27974827). Interacts with catalytic subunit PPP3CB/calcineurin A (PubMed:26794871). Interacts with CIB1 (via C-terminal region); the interaction increases upon cardiomyocyte hypertrophy (By similarity). Interacts with RCAN1 (PubMed:12809556).

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EXTERNAL LINKS

PPP3R1

Calcineurin subunit B type 1

ligandability Mutations

PPP3R1

Molecular Synopsis