This entry represents the Serine/threonine-protein phosphatase 4 regulatory subunit 3 (also known as SMEK homologue) PP4R3, which forms a complex with the phosphatase 4 catalytic subunit (PP4c), localising it to the DNA damage repair machinery [1-4] and regulates its activity. PP4c is involved in developmental progression, chemotaxis, expression of stress response genes and cell movement.

1: SMK-1, an essential regulator of DAF-16-mediated longevity. Wolff S, Ma H, Burch D, Maciel GA, Hunter T, Dillin A; Cell. 2006;124:1039-1053. PMID:16530049

2: The Saccharomyces cerevisiae orthologue of the human protein phosphatase 4 core regulatory subunit R2 confers resistance to the anticancer drug cisplatin. Hastie CJ, Vazquez-Martin C, Philp A, Stark MJ, Cohen PT; FEBS J. 2006;273:3322-3334. PMID:16857015

3: A novel, evolutionarily conserved protein phosphatase complex involved in cisplatin sensitivity. Gingras AC, Caballero M, Zarske M, Sanchez A, Hazbun TR, Fields S, Sonenberg N, Hafen E, Raught B, Aebersold R; Mol Cell Proteomics. 2005;4:1725-1740. PMID:16085932

4: A Mec1- and PP4-dependent checkpoint couples centromere pairing to meiotic recombination. Falk JE, Chan AC, Hoffmann E, Hochwagen A; Dev Cell. 2010;19:599-611. PMID:20951350