DNA ligase I from Xenopus laevis eggs.

Abstract : We have purified the major DNA ligase from Xenopus laevis eggs and raised antibodies against it. Estimates from SDS PAGE indicate that this DNA ligase is a 180 kDa protein. This enzyme is similar to the mammalian type I DNA ligase which is presumed to be involved in DNA replication. We have also analysed DNA ligase activity during X. laevis early development. Unfertilized eggs contain the highest level of activity reflecting the requirement for a large amount of DNA replicative enzymes for the period of intense replication following fertilization. In contrast with previous studies on the amphibians axolotl and Pleurodeles, the major DNA ligase activity detected during X. laevis early development is catalysed by a single enzyme: DNA ligase I. And the presence of this DNA ligase I in Xenopus egg before fertilization clearly demonstrates that the exclusion process of two forms of DNA ligase does not occur during X. laevis early development.
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Article dans une revue
Nucleic Acids Research, Oxford University Press, 1991, 19 (4), pp.701-5
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Contributeur : Claude Prigent <>
Soumis le : mercredi 26 mars 2014 - 08:11:14
Dernière modification le : mercredi 16 mai 2018 - 11:24:08

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  • HAL Id : inserm-00966020, version 1
  • PUBMED : 2017356

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Serge Hardy, Saïd Aoufouchi, Pierre Thiebaud, Claude Prigent. DNA ligase I from Xenopus laevis eggs.. Nucleic Acids Research, Oxford University Press, 1991, 19 (4), pp.701-5. 〈inserm-00966020〉

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