Participates positively in the ciliary Hedgehog (Hh) signaling. Found Associated with the EvC complex composed of EFCAB7, IQCE, EVC2 and EVC. Colocalizes with EVC and IQCE at the EvC zone of primary cilia. May be produced at very low levels due to a premature stop codon in the mRNA, leading to nonsense-mediated mRNA decay. Truncated N-terminus.