Lysosomal membrane protein that transports cobalamin (Vitamin B12) from the lysosomal lumen to the cytosol in an ATP-dependent manner ( , ). Targeted by LMBRD1 lysosomal chaperone from the endoplasmic reticulum to the lysosomal membrane . Then forms a complex with lysosomal chaperone LMBRD1 and cytosolic MMACHC to transport cobalamin across the lysosomal membrane .
Subcellular locations: Endoplasmic reticulum membrane, Lysosome membrane
Targeted by LMBRD1 lysosomal chaperone to the lysosomal membrane.
Ubiquitous.