GTPase tethering membranes through formation of trans-homooligomers and mediating homotypic fusion of endoplasmic reticulum membranes. Functions in endoplasmic reticulum tubular network biogenesis. May also regulate Golgi biogenesis. May regulate axonal development.
Subcellular locations: Endoplasmic reticulum membrane, Golgi apparatus membrane, Cell projection, Axon
Localizes to endoplasmic reticulum tubular network.