Acts as a positive regulator of ciliary hedgehog signaling (PubMed:29459677). Probable regulator of ciliogenesis involved in limb morphogenesis (PubMed:30395363). In cooperation with CBY1 it is involved in the recruitment and fusion of endosomal vesicles at distal appendages during early stages of ciliogenesis (By similarity). Plays an important role in the mitochondrial function and is essential for maintaining mitochondrial morphology and inner membrane ultrastructure (By similarity). In vitro, can generate membrane curvature through preferential interaction with negatively charged phospholipids such as phosphatidylinositol 4,5-bisphosphate and cardiolipin and hence orchestrate cristae shape (By similarity). Homodimer (via BAR-like domain). Heterodimer with FAM92B (via BAR-like domains). Interacts (via BAR-like domain) with CBY1; this interaction is required for targeting FAM92A to centriole and cilium basal body. Weak punctate vesicular distribution throughout the cytoplasm. Localizes at the distal end of mother centrioles. Extensive colocalization with CBY1 at mother centrioles (PubMed:27528616). Localizes at the transition zone, a region between the basal body and the ciliary axoneme (PubMed:29459677). Expressed in the heart, liver, spleen, lung, kidney, brain and muscle (at protein level) (PubMed:30404948). Strongly expressed throughout the developing limb bud, including the progress zone and the apical ectodermal ridge (PubMed:30395363). High and steady expression is observed in the developing limb throughout embryonic stages 11.5-15.5 dpc. The BAR-like domain displays limited similarity to other BAR domains. Knockout homozygous mice show uni- or bilateral abnormal bone growth or exostosis on the deltoid tuberosity of the humerus, abnormalities at the left stifle consistent with a tendon calcification, and abnormal digit morphology including polysyndactyly and osteomas on the hind paw metatarsals. Belongs to the CIBAR family. Extended N-terminus. Extended N-terminus.