Protein
Coiled-coil domain-containing protein 40 homolog
Organism
Chlamydomonas reinhardtii
Function
Required for assembly of dynein regulatory complex (DRC) and inner dynein arm complexes, which are responsible for ciliary beat regulation, by acting as a molecular ruler that determines the 96 nanometer (nm) repeat length and arrangements of components in cilia and flagella (PubMed:25395538). Together with CCDC39/FAP59 forms a 96-nm-long complex in flagella. This complex does not act as a physical ruler, but rather act as a negative regulator for radial spokes: the complex lays along specific protofilaments, masking radial spoke binding sites and allowing recruitment of inner dynein arm (IDA) and nexin-dynein regulatory complexes (N-DRC) (PubMed:25395538).
Similarity
Belongs to the CCDC40 family.
Sequence
MADPMDQPSTSDPVDNQIFGEQGGLRPDHPLLRRAQEALKVQFEANRTRLQEELREKANALKQAKARREALGVELYGFQQNLAKLQLNLETTHQNYQCEDQLNQLKQQLSLEEGDTKGERSRRVCVCVCRVCCRIDTLQDNLKGTQQQLALVSAQLEAQKRETRAALETLAEAEVGGCVRDEALSAIQDGMREQQQQELSLVLEIEGYKKDVVREQLKHESLTAVVRKVEGDAVFVQKQIEGAQERQARLQEILAKLAKSLEHTEAEGEADAVDRAITKVAAEGRAIEEEMLSALSDQTTAEKATSKTAADTQELRKRIRAEELAVVETENELAKLQVDILNTEAHNSRLGETLGLLDEELRDKGRTIEKYELEIKRRNDEIEKKTREIDILNRRRDCRGSAALDTRPLQAPPPPQVKSDLALTTPMYTPPPVPQPSVGMTVTTEKLVSDMEKALTKREIISVKGRATAAKSKSSTPAGSATASSRASPSASVASSTLTRNQLDRATTDLAKSIKDLEAGRYRPVVEDAAAVGEELGRAQDKLGRVVALLEGLRQAAPHLAGELDKVLCHVADVRA