The function of ENSG00000204472 (AIF1, allograft inflammatory factor 1) is as follows. Actin-binding protein that enhances membrane ruffling and RAC activation. Enhances the actin-bundling activity of LCP1. Binds calcium. Plays a role in RAC signaling and in phagocytosis. May play a role in macrophage activation and function. Promotes the proliferation of vascular smooth muscle cells and of T-lymphocytes. Enhances lymphocyte migration. Plays a role in vascular inflammation. {ECO:0000269|PubMed:15117732, ECO:0000269|PubMed:16049345, ECO:0000269|PubMed:18699778}.