May play a role in regulated exocytosis. In neuronal cells, modulates the localization of synaptophysin/SYP into synaptic-like microvesicles and may therefore play a role in the formation and/or the maturation of this vesicles. May also play a role in GLUT4 storage and transport to the plasma membrane. . (Microbial infection) May play a role in the assembly of cytoplasmic inclusion bodies required for SFTS phlebovirus replication. . This is the function of Ensembl gene identifier ENSG00000108639 (SYNGR2, synaptogyrin 2).