The function of Ensembl gene identifier ENSG00000128815 (WDFY4, WDFY family member 4) is as follows. Plays a critical role in the regulation of cDC1-mediated cross-presentation of viral and tumor antigens in dendritic cells. Mechanistically, acts near the plasma membrane and interacts with endosomal membranes to promote endosomal-to-cytosol antigen trafficking. Also plays a role in B-cell survival through regulation of autophagy. .