PMID: identifiant
de la référence Pubmed : |
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 (22627133) |
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| titre : |
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The subcellular localization of cyclin B2 is required for bipolar spindle formation during Xenopus oocyte maturation. |
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| auteur(s) : |
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Satoshi Yoshitome ( ) 1, Nobuaki Furuno2, Claude Prigent3, Eikichi Hashimoto4 |
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| laboratoire : |
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| résumé : |
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Cyclins B1 and B2 are subtypes of cyclin B, a regulatory subunit of a maturation/M-phase promoting factor, and they are also highly conserved in many vertebrate species. Cyclin B1 is essential for mitosis, whereas cyclin B2 is regarded as dispensable. However, the overexpression of the cyclin B2 N-terminus containing the cytoplasmic retention signal, but not cyclin B1, inhibits bipolar spindle formation in Xenopus oocytes and embryos. Here we show that endogenous cyclin B2 was localized in and around the germinal vesicle. The perinuclear localization of cyclin B2 was perturbed by the overexpression of its N-terminus containing the cytoplasmic retention signal, which resulted in a spindle defect. This spindle defect was rescued by the overexpression of bipolar kinesin Eg5, which is located at the perinuclear region in the proximity of endogenous cyclin B2. These results demonstrate that the proper localization of cyclin B2 is essential for bipolar spindle formation in Xenopus oocytes. |
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| domaine : |
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Sciences du Vivant/Biologie cellulaire
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langue du texte
intégral : |
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Anglais |
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| ISSN : |
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0006-291X |
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| type de publication : |
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Articles dans des revues avec comité de lecture |
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| DOI : |
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10.1016/j.bbrc.2012.05.080 |
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| journal : |
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| Biochemical and Biophysical Research Communications (Biochem Biophys Res Commun) |
| Publisher |
Elsevier |
| ISSN |
0006-291X (eISSN : 1090-2104) |
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| Audience : |
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internationale |
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| date de publication : |
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22/05/2012 |
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date de publication
électronique : |
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22/05/2012 |
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| page, identifiant, ... : |
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epub ahead of print |
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| mots-clés auteur : |
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Cyclin B2 – Subcellular localization – Spindle apparatus – Xenopus oocytes |
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