title: Casein kinase 1 is required for efficient removal of Rec8 during meiosis I.
abstract: Segregation of chromosomes during meiosis depends on separase cleavage of Rec8, the meiosis-specific alpha-kleisin subunit of cohesin. We mapped Rec8 phosphorylation sites by mass spectrometry and show that Rec8 phosphorylation is required for proper chromosome disjunction during meiosis. We further show that the fission yeast casein kinase 1 (CK1) delta/epsilon isoforms Hhp1 and Hhp2 are required for full levels of Rec8 phosphorylation and for efficient removal of Rec8 at the onset of anaphase I. Our data are consistent with the model that Hhp1/Hhp2-dependent phosphorylation of Rec8 is required for separase-mediated cleavage of Rec8 during meiosis I.
authors.affiliation: Max F. Perutz Laboratories, University of Vienna, Vienna, Austria.
authors.forename: Cornelia
authors.initials: C
authors.lastname: Rumpf
authors.forename: Lubos
authors.initials: L
authors.lastname: Cipak
authors.forename: Andrej
authors.initials: A
authors.lastname: Dudas
authors.forename: Zsigmond
authors.initials: Z
authors.lastname: Benko
authors.forename: Miroslava
authors.initials: M
authors.lastname: Pozgajova
authors.forename: Christian G
authors.initials: CG
authors.lastname: Riedel
authors.forename: Gustav
authors.initials: G
authors.lastname: Ammerer
authors.forename: Karl
authors.initials: K
authors.lastname: Mechtler
authors.forename: Juraj
authors.initials: J
authors.lastname: Gregan
mesh_terms: D000705:Anaphase; D015825:Chromosomes, Fungal / Q000378:metabolism; D013058:Mass Spectrometry; D008540:Meiosis; D010750:Phosphoproteins / Q000737:chemistry / Q000378:metabolism*; D010766:Phosphorylation; D011494:Protein Kinases / Q000378:metabolism*; D021381:Protein Transport; D012568:Schizosaccharomyces / Q000166:cytology* / Q000201:enzymology*; D029702:Schizosaccharomyces pombe Proteins / Q000737:chemistry / Q000378:metabolism*; D013347:Subcellular Fractions / Q000378:metabolism; D000097722:Cohesins
chemical_list: D010750:Phosphoproteins; D011494:Protein Kinases; D029702:Schizosaccharomyces pombe Proteins; C077081:REC8 protein, S pombe; D000097722:Cohesins; C088232:hhp1 protein, S pombe; C088231:hhp2 protein, S pombe