May play a role in early endosome fusion upstream of RAB5, hence regulating receptor trafficking and fluid-phase transport. Enhances cellular sensitivity to TNF-induced apoptosis (PubMed:18288467). {ECO:0000269|PubMed:18288467, ECO:0000269|PubMed:19995552, ECO:0000269|PubMed:22816767}. This is the function of PLEKHF2 (pleckstrin homology and FYVE domain containing 2, Ensembl gene identifier ENSG00000175895).