CELE_T28F3.6, T28F3.6

ifta-2 encodes a ciliary protein, orthologous to human RABL5, that is required for normally short life span and dauer formation; IFTA-2 is expressed in amphid, labial, and phasmid ciliated sensory neurons; intracellularly, IFTA-2 resides in the bases and axonemes of cilia, colocalizing with DAF-2 and AGE-1; IFTA-2 may be either a cargo or a cargo-docking component of intraflagellar transport (IFT) by the IFT-B complex; ciliary basal localization of IFTA-2 is abolished by a T42N mutation predicted to lock ITFA-2 into an inactive, GDP-bound conformation; ifta-2(tm1724) mutants have abnormally long lifespans and constitutive dauer formation, perhaps because IFTA-2 regulates DAF-2 signalling from ciliated sensory neurons; IFTA-2 is not required for cilium assembly or IFT, nor is it required for chemosensation or osmosensation; the ciliary localization of IFTA-2 is conserved in RABL5; via an X-box in its promoter, ifta-2 is a candidate for direct regulation by DAF-19.

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