1. Marie-Emilie Terret and Prasad V. Jallepalli are in the Molecular Biology Program, Memorial Sloan-Kettering Cancer Center, 1275 York Avenue, New York, NY 10021, USA.
   e-mail: jallepap@mskcc.org

Abstract

During anaphase, the cysteine protease separase cleaves cohesin and releases sister chromatids. In budding yeast, separase also has a crucial non-proteolytic role in triggering mitotic exit. Separase performs a similar non-catalytic function in frog and mouse oocytes through its physical interaction with cdk1. Vertebrate separase is therefore essential not only for homologue disjunction, but also for bringing about the end of meiosis I.

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