May regulate the electrogenic sodium/bicarbonate cotransporter SLC4A4 activity and Mg(2+)-sensitivity. On the contrary of its homolog AHCYL1, does not regulate ITPR1 sensitivity to inositol 1,4,5-trisphosphate .
Subcellular locations: Cytoplasm, Microsome
Associates with membranes when phosphorylated, probably through interaction with ITPR1.