Component of the EvC complex that positively regulates ciliary Hedgehog (Hh) signaling (PubMed:24582806). Required for proper limb morphogenesis (By similarity). 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 N-terminus) with EFCAB7 (via EF-hands 1 and 2); 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) (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).