Coiled-coil domain-containing protein 39 (Ccdc39)

Required for assembly of dynein regulatory complex (DRC) and inner dynein arm (IDA) complexes, which are responsible for ciliary beat regulation, thereby playing a central role in motility in cilia and flagella. Probably acts together with CCDC40 to form a molecular ruler which determines the 96 nanometer (nm) repeat length and arrangements of elements in cilia and flagella.

Not required for outer dynein arm complexes assembly. .