calbindin-D9k

calbindin-D9k

A calcium-binding protein encoded by S100G, which is found in the intestinal epithelial cells. It has two EF-hand-type calcium-binding domains along its single 263-residue chain. It mediates calcium transport across the intestine from the apical side, which is regulated by TRPV6, a calcium channel to the basal pole of the enterocyte, where PMCA1 uses ATP to pump calcium into the circulation.