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Arora, C., Kee, K., Maleki, S., et al. (2004) Antiviral protein Ski8 is a direct partner of Spo11 in meiotic DNA break formation, independent of its cytoplasmic role in RNA metabolism. Molecular Cell, 13, 549-559. doi:10.1016/S1097-2765(04)00063-2

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• TITLE: Irr1/Scc3 cohesin interacts with Rec8 in meiotic prophase of Saccharomyces cerevisiae

  AUTHORS: Agata Cena, Piotr Kowalec, Danuta Płochocka, Anna Kurlandzka

  KEYWORDS: Irr1/Scc3; Cohesin; Rec8; Meiosis; Saccharomyces cerevisiae

  JOURNAL NAME: Open Journal of Genetics, Vol.2 No.1, March 2, 2012

  ABSTRACT: The meiotic cohesin complex of S. cerevisiae shares with the mitotic one the Irr1/Scc3, Smc1, and Smc3 subunits, while the meiosis-specific subunit Rec8 replaces mitotic subunit Scc1/Mcd1. We noticed earlier that the irr1-1 mutation (F658G) severely affected meiosis. The irr1 1/IRR1 cells were entering meiosis before having completed mitotic cell division. Using meiotic two-hybrid assay and co-immunoprecipitation we show that in cells arrested in pachytene due to a lack of a gene-regulatory factor Ndt80, the Irr1 protein interacts with Rec8p and the irr1-1 mutation abolishes this interaction. These findings indicate an important role of Irr1p in early stages of meiosis.