Specific subunit of the TRAPP (transport protein particle) II complex, a highly conserved vesicle tethering complex that functions in late Golgi trafficking as a membrane tether (By similarity). TRAPP II complex has also GEF activity toward RAB1A (By similarity). TRAPPC14 is required for ciliogenesis (PubMed:30715179). Component of the multisubunit TRAPP II complex, which includes at least TRAPPC1, TRAPPC2, TRAPPC2L, TRAPPC3, TRAPPC4, TRAPPC5, TRAPPC6A/B, TRAPPC9, TRAPPC10 and TRAPPC14. TRAPPC9, TRAPPC10 and TRAPPC14 are specific subunits of the TRAPP II complex. Interacts with alpha-tubulin during mitosis. During mitosis, precedes alpha-tubulin in gap formation of cell abscission at the midbody and is co-localized with PLK1 at the edges of microtubules extensions of daughter cells post cytokinesis abscission. Morpholino knockdown of the protein in early embryos results in curved bodies and small eyes. Morphants exhibit reduced ciliation in otic vesicles, neuromasts, and olfactory placodes (PubMed:31467083). In a knockout model mutant animals show head to body ratios lower than those of controls. They have decreased brain cell proliferation rate at 24 hpf (PubMed:30715179).