The function of ENSG00000104112 (SCG3, secretogranin III) is as follows. Member of the granin protein family that regulates the biogenesis of secretory granules (PubMed:19357184). Acts as a sorting receptor for intragranular proteins including chromogranin A/CHGA (By similarity). May also play a role in angiogenesis. Promotes endothelial proliferation, migration and tube formation through MEK/ERK signaling pathway (PubMed:29154827). {ECO:0000250|UniProtKB:P47868, ECO:0000269|PubMed:19357184, ECO:0000269|PubMed:29154827}.