May regulate calcium-dependent activities in the endoplasmic reticulum lumen or post-ER compartment.
Isoform 5 may be involved in the exocytosis of zymogens by pancreatic acini.
Subcellular locations: Golgi apparatus lumen
Subcellular locations: Cytoplasm, Cell membrane, Cell projection, Bleb
Isoform 5 colocalizes with STX3 and STXBP1 isoform 2 at the plasma membrane and cell surface blebs.
Ubiquitous. Isoform 5 is expressed in pancreas.