Required for anchoring microtubules to the centrosomes (PubMed:16314388, PubMed:28659385). Required for ciliation (PubMed:28625565, PubMed:28659385). Homodimer (PubMed:16690081). Part of a ternary complex that contains CEP350, CEP43 and MAPRE1. Interacts directly with CEP350 and MAPRE1 (PubMed:16314388). Interacts with CEP19 (PubMed:28625565, PubMed:28428259, PubMed:28659385). Interacts (via N-terminus) with CEP350 (via C-terminus) (PubMed:28625565, PubMed:28428259). Associated with gamma-tubulin (PubMed:16314388). Localizes on both mother and daughter centrioles (PubMed:28625565, PubMed:28428259). Localizes to an axial position on the mother centriole (PubMed:28625565). Localizes to the distal end of the centriole partly on the subdistal appendage region (PubMed:28659385). Ubiquitous. Highly expressed in heart, liver, muscle, kidney, intestine, colon, adrenal gland, prostate, testis, and pancreas. A chromosomal aberration involving CEP43 may be a cause of stem cell myeloproliferative disorder (MPD). Translocation t(6;8)(q27;p11) with FGFR1. MPD is characterized by myeloid hyperplasia, eosinophilia and T-cell or B-cell lymphoblastic lymphoma. In general it progresses to acute myeloid leukemia. The fusion proteins CEP43-FGFR1 or FGFR1-CEP43 may exhibit constitutive kinase activity and be responsible for the transforming activity (PubMed:9949182). Belongs to the CEP43 family. Interacting region of CEP19 is conflicting: According to a report, interacts via N-terminus (PubMed:28428259). According to another report, interacts via C-terminus (PubMed:28659385).