Essential Cdk1-inhibitory role for separase during meiosis I in vertebrate oocytes

Titelangaben

Gorr, Ingo H. ; Reis, Alexandra ; Boos, Dominik ; Wühr, Martin ; Madgwick, Suzanne ; Jones, Keith T. ; Stemmann, Olaf:
Essential Cdk1-inhibitory role for separase during meiosis I in vertebrate oocytes.
In: Nature Cell Biology. Bd. 8 (8 September 2006) . - S. 1035-1037.
ISSN 1476-4679
DOI: https://doi.org/10.1038/ncb1467

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Abstract

Separase not only triggers anaphase of meiosis I by proteolytic cleavage of cohesin on chromosome arms, but in vitro vertebrate separase also acts as a direct inhibitor of cyclin-dependent kinase 1 (Cdk1) on liberation from the inhibitory protein, securin. Blocking separase-Cdk1 complex formation by microinjection of anti-separase antibodies prevents polar-body extrusion in vertebrate oocytes. Importantly, proper meiotic maturation is rescued by chemical inhibition of Cdk1 or expression of Cdk1-binding separase fragments lacking cohesin-cleaving activity.