FEATURES

FAMILY

DESCRIPTION

Also known as PPLA_HUMAN, PLN, PLB. Reversibly inhibits the activity of ATP2A2 in cardiac sarcoplasmic reticulum by decreasing the apparent affinity of the ATPase for Ca(2+) (PubMed:28890335). Modulates the contractility of the heart muscle in response to physiological stimuli via its effects on ATP2A2. Modulates calcium re-uptake during muscle relaxation and plays an important role in calcium homeostasis in the heart muscle. The degree of ATP2A2 inhibition depends on the oligomeric state of PLN. ATP2A2 inhibition is alleviated by PLN phosphorylation. Homopentamer (PubMed:16043693, PubMed:16897780). Interacts with HAX1 (PubMed:17241641). Interact with ATP2A2; the inhibition decreases ATP2A2 Ca(2+) affinity (PubMed:28890335). Interacts with VMP1; VMP1 competes with PLN and SLN to prevent them from forming an inhibitory complex with ATP2A2 (PubMed:28890335). Interacts with S100A1 in a Ca(2+)-dependent manner (PubMed:12804600).

EXTERNAL LINKS

PLN

Cardiac phospholamban

PLN

Molecular Synopsis