Zinc ion transporter mediating zinc entry from the cytosol into the lumen of organelles along the secretory pathway (, ). By contributing to zinc ion homeostasis within the early secretory pathway, regulates the activation and folding of enzymes like alkaline phosphatases (, ).
Subcellular locations: Golgi apparatus membrane, Cytoplasmic vesicle, Golgi apparatus, Trans-Golgi network, Sarcoplasmic reticulum, Mitochondrion