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Boucher D, Loones MT, Pyne CK, et al. Immunolocalization of a nuclear protein bound to the sphere organelle during oogenesis and embryogenesis inPleurodeles waltl. Rouxs Arch Dev Biol. 1991;199(8):458-468doi: 10.1007/BF01705782.
Boucher, D., Loones, M. T., Pyne, C. K., Simon, F., Abbadie, C., Charlemagne, J., & Lacroix, J. C. (1991). Immunolocalization of a nuclear protein bound to the sphere organelle during oogenesis and embryogenesis inPleurodeles waltl. Roux's archives of developmental biology : the official organ of the EDBO, 199(8), 458-468. https://doi.org/10.1007/BF01705782
Boucher, Dominique, et al. "Immunolocalization of a nuclear protein bound to the sphere organelle during oogenesis and embryogenesis inPleurodeles waltl." Roux's archives of developmental biology : the official organ of the EDBO vol. 199,8 (1991): 458-468. doi: https://doi.org/10.1007/BF01705782
Boucher D, Loones MT, Pyne CK, Simon F, Abbadie C, Charlemagne J, Lacroix JC. Immunolocalization of a nuclear protein bound to the sphere organelle during oogenesis and embryogenesis inPleurodeles waltl. Rouxs Arch Dev Biol. 1991 Aug;199(8):458-468. doi: 10.1007/BF01705782. PMID: 28305890.
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Rouxs Arch Dev Biol. 1991 Aug;199(8):458-468. doi: 10.1007/BF01705782.

Immunolocalization of a nuclear protein bound to the sphere organelle during oogenesis and embryogenesis inPleurodeles waltl.

Roux's archives of developmental biology : the official organ of the EDBO

Dominique Boucher, Marie-Thérèse Loones, Chandra K Pyne, Françoise Simon, Corinne Abbadie, Jacques Charlemagne, Jean-Claude Lacroix

Affiliations

  1. Laboratoire de Génétique du Développement, Université Pierre et Marie Curie, Bâtiment C-30, 9 quai Saint-Bernard, F-75005, Paris, France.
  2. Laboratoire d'Immunologie Comparée, UA CNRS 1135, Université Pierre et Marie Curie, Bâtiment C-30, 9 quai Saint-Bernard, F-75005, Paris, France.

PMID: 28305890 DOI: 10.1007/BF01705782

Abstract

The distribution of a nuclear antigen ofPleurodeles waltl oocytes, recognized by the monoclonal antibody B24/1, has been studied during oogenesis and early embryonic development. In stage I oocytes the antigen was localized in the nucleoplasm and on two atypical structures of lampbrush chromosomes, the spheres (S) and the mass (M). The immunostaining increased as the oocyte developed. In stage VI oocytes, the nucleoplasm and spheres showed intense staining. At this stage, the nucleoplasm often contained free spheres which were also labelled. The staining of M diminished during oogenesis, as did its size. Immunoblots of nuclear proteins of oocytes at different stages confirmed that there was an accumulation of this protein during oogenesis. During embryonic development, the nuclei of all the cells of blastula and gastrula were labelled by this antibody: there was no embryonic regionalization. Starting from the neurula stage, the staining progressively disappeared from the nuclei of ectodermal and mesodermal cells. In the tailbud stage, only the endodermal cell nuclei showed faint staining. Immunoblots of proteins from embryos of different stages showed that the quantity of this protein was constant until the young gastrula stage and then decreased progressively; in the young tailbud stage, this protein was practically absent. B24/1 is the first described protein of the sphere. This protein is accumulated in the oocyte nucleus and behaves like a maternal polypeptide, shifting early in the nuclei during embryonic development. Thus, B24/1 probably has a function required from the early developmental stages, perhaps in relation with small nuclear ribonucleoproteins.

Keywords: Development; Lampbrush chromosomes; Monoclonal antibody; Oocyte nuclear proteins; Pleurodeles waltl

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