SMEK homolog 1, suppressor of mek1 (Dictyostelium)
Regulatory subunit of serine/threonine-protein phosphatase 4. May regulate the activity of PPP4C at centrosomal microtubule organizing centers. The PPP4C-PPP4R2-PPP4R3A PP4 complex specifically dephosphorylates H2AFX phosphorylated on 'Ser-140' (gamma-H2AFX) generated during DNA replication and required for DNA DSB repair.
Belongs to the SMEK family. Contains 1 WH1 domain.
Cytoplasm. Cytoplasm, cytoskeleton, microtubule organizing center, centrosome. Nucleus. In interphase localized in the cytoplasm and in the nucleus (with higher levels). During metaphase located in pericentriolar regions.