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XB-ART-37500
Mol Cell Biol 2008 Jun 01;2812:4196-203. doi: 10.1128/MCB.00169-08.
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Regulation of the Aurora B chromosome passenger protein complex during oocyte maturation in Xenopus laevis.

Yamamoto TM , Lewellyn AL , Maller JL .


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The dynamics of the Aurora B protein kinase during Xenopus oocyte meiotic maturation were examined. Resting G2 oocytes express inactive Aurora B that is not associated with other subunits of the chromosome passenger complex (CPC). Activity increases near the time of germinal vesicle breakdown in progesterone-treated oocytes, and this increase is correlated with the synthesis of inner centromere protein (INCENP) and survivin, components of the CPC. Ablation of INCENP synthesis led to the failure of progesterone treatment to activate Aurora B, but biochemical progression through the meiosis I-to-II transition and arrest at metaphase II were not affected. At fertilization, Aurora B was deactivated in concert with the degradation of INCENP, and the levels of Aurora B kinase activity and INCENP oscillated in subsequent embryonic cell cycles. Prevention of the decrease in Aurora B activity at fertilization by expression of ectopic wild-type INCENP, but not kinase-dead Aurora B INCENP, blocked calcium-induced exit from metaphase arrest in egg extracts.

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Species referenced: Xenopus laevis
Genes referenced: aurkb birc5 incenp

References [+] :
Andreassen, Telophase disc: a new mammalian mitotic organelle that bisects telophase cells with a possible function in cytokinesis. 1991, Pubmed