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Intranuclear injection of anti-actin antibodies into Xenopus oocytes blocks chromosome condensation

Nature volume 282, pages 320–321 (1979)Cite this article

Abstract

The role of contractile proteins in the structural organisation of the interphase nucleus and of metaphase chromosomes is largely unknown. Actin has been found in interphase nuclei of different species, especially in association with condensed chromatin1–6. In the germinal vesicle (nucleus) of Xenopus oocytes, actin has been localised in the nuclear gel supporting the chromosomes and the extrachromosomal nucleoli7–10. It has been reported that the premeiotic lampbrush chromosomes in these germinal vesicles are positively stained for actin and tubulin by the immunoperoxidase technique11. Moreover, the longitudinal contraction of these chromosomes is ATP dependent12. Therefore it has been suggested that actin participates in the structural organisation of the highly specialised lampbrush chromosomes. However, actin is not a major component of the metaphase chromosome scaffold13. The results reported here suggest that actin is involved in the condensation of Xenopus chromosomes.

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Authors and Affiliations

  1. Department of Animal Biology, University of Geneva, 154, Route de Malagnou, 1224, Chêne-Bougeries, Switzerland

    D. Rungger

  2. Department of Pathology, University of Geneva, 40, Boulevard de la Cluse, 1211, Geneva, 4, Switzerland

    E. Rungger-Brändle, C. Chaponnier & G. Gabbiani

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  1. D. Rungger
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  3. C. Chaponnier
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  4. G. Gabbiani
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Rungger, D., Rungger-Brändle, E., Chaponnier, C. et al. Intranuclear injection of anti-actin antibodies into Xenopus oocytes blocks chromosome condensation. Nature 282, 320–321 (1979). https://doi.org/10.1038/282320a0

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