The function of IFT122 (intraflagellar transport 122, ENSG00000163913) is as follows. As a component of the IFT complex A (IFT-A), a complex required for retrograde ciliary transport and entry into cilia of G protein-coupled receptors (GPCRs), it is required in ciliogenesis and ciliary protein trafficking (PubMed:20889716, PubMed:27932497, PubMed:29220510, PubMed:36775821). Involved in cilia formation during neuronal patterning (By similarity). {ECO:0000250|UniProtKB:Q6NWV3, ECO:0000269|PubMed:20889716, ECO:0000269|PubMed:27932497, ECO:0000269|PubMed:29220510, ECO:0000269|PubMed:36775821}.