Mitochondrial proton/calcium exchanger protein (LETM1)

Mitochondrial proton/calcium antiporter that mediates proton-dependent calcium efflux from mitochondrion (PubMed:19797662). Crucial for the maintenance of mitochondrial tubular networks and for the assembly of the supercomplexes of the respiratory chain (PubMed:18628306).

Required for the maintenance of the tubular form and cristae organization (PubMed:18628306). Compared to SLC8B1/NCLX, doesn't constitute the significant element for mitochondrial calcium extrusion (PubMed:24898248).