May be involved in regulating membrane trafficking in the endosomal pathway. Overexpression induces endosome aggregation. Required to target TOM1 to endosomes. {ECO:0000269|PubMed:11546807, ECO:0000269|PubMed:14613930}. This is the function of Ensembl gene identifier ENSG00000039319 (ZFYVE16, zinc finger FYVE-type containing 16).