Multiciliate differentiation and DNA synthesis associated protein (MCIDAS) (MCIDAS)

Multiciliate differentiation and DNA synthesis associated protein (MCIDAS), also known as Multicilin, is a specialized transcriptional co-activator essential for the production of multiciliated cells (UniProt Q6A162). It functions by forming a ternary complex with E2F transcription factors (E2F4 or E2F5) and DP1, which then binds to and activates the promoters of genes required for centriole biogenesis and motile cilia assembly, such as CCNO and CDC20B (Ma et al., 2014). This protein is critical for the development of tissues that rely on ciliary motion, including the respiratory epithelium, the lining of the brain ventricles, and the fallopian tubes. Mutations in the MCIDAS gene are a primary cause of Reduced Generation of Multiple Motile Cilia (RGMC), a rare ciliopathy characterized by chronic respiratory infections, bronchiectasis, and infertility (Boon et al., 2014). Although there are currently no approved small-molecule drugs targeting MCIDAS, it is a major focus for genetic screening and potential gene therapy aimed at restoring ciliary function in affected patients. Its dual role in regulating both multiciliogenesis and aspects of the cell cycle suggests that its precise regulation is vital to prevent aberrant cell proliferation or developmental defects (Stubbs et al., 2012).

Other names

MulticilinIDASProtein MCIDASMCIMCIN

MCIDAS acts as a transcriptional co-activator by forming a complex with E2F4/5 and DP1 to trigger the expression of genes required for centriole assembly and multiciliogenesis (Ma et al., 2014).