The function of Ensembl gene identifier ENSG00000051009 (FHIP1B, FHF complex subunit HOOK interacting protein 1B) is as follows. Component of the FTS/Hook/FHIP complex (FHF complex). The FHF complex may function to promote vesicle trafficking and/or fusion via the homotypic vesicular protein sorting complex (the HOPS complex). FHF complex promotes the distribution of AP-4 complex to the perinuclear area of the cell (PubMed:32073997). {ECO:0000269|PubMed:18799622, ECO:0000269|PubMed:32073997}.