Component of the EvC complex that positively regulates ciliary Hedgehog (Hh) signaling (PubMed:24582806). Required for the localization of the EVC2:EVC subcomplex at the base of primary cilia (PubMed:24582806). Component of the EvC complex composed of EFCAB7, IQCE, EVC2 and EVC; built from two subcomplexes, EVC2:EVC and EFCAB7:IQCE (PubMed:24582806). Interacts (via EF-hand 1 and 2) with IQCE (via N-terminus); this interaction anchors the EVC-EVC2 complex in a signaling microdomain at the base of cilia and stimulates the Hedgehog (Hh) pathway (PubMed:24582806). Interacts with EVC2 (via N-terminal end) (PubMed:24582806). Interacts with EVC (PubMed:24582806). The EvC complex localizes at the base of cilia in the EvC zone of primary cilia in a EFCAB7-dependent manner (PubMed:24582806).