Component of the EvC complex that positively regulates ciliary Hedgehog (Hh) signaling. Required for the localization of the EVC2:EVC subcomplex at the base of primary cilia. Component of the EvC complex composed of EFCAB7, IQCE, EVC2 and EVC; built from two subcomplexes, EVC2:EVC and EFCAB7:IQCE. 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. Interacts with EVC2 (via N-terminal end). Interacts with EVC. The EvC complex localizes at the base of cilia in the EvC zone of primary cilia in a EFCAB7-dependent manner.