Cytochrome b5 domain-containing protein 1 (CYB5D1)

Cytochrome b5 domain-containing protein 1 (CYB5D1) is a membrane-associated heme-binding protein characterized by a cytochrome b5-like domain[3][7]. It is localized to the cytoplasm and cytoskeleton, particularly associated with cilia, and acts as a radial spoke stalk protein involved in ciliary movement and the regulation of cilium beat frequency[2][7]. CYB5D1 binds heme under oxidizing conditions and is thought to function in redox signaling within motile cilia, facilitating the coordinated beating necessary for normal ciliary function. Mutations or loss of CYB5D1 in model organisms such as zebrafish and Chlamydomonas result in defective and uncoordinated ciliary or flagellar motility, implicating redox regulation as a key mechanism[2]. In humans, CYB5D1 is associated with certain diseases, including Li-Fraumeni syndrome and hereditary retinal dystrophy, but there is no current evidence that it is a direct therapeutic target, nor are there known drugs that specifically modulate its activity or function[7].

Other names

Cytochrome b5 domain-containing protein 1FLJ32499CB5D1