Characterization of a gonad-specific transforming growth factor-beta superfamily member differentially expressed during the reproductive cycle of the oyster Crassostrea gigas.

Elodie Fleury 1 Caroline Fabioux 1 Christophe Lelong 2 Pascal Favrel 2 Arnaud Huvet 1, *
* Auteur correspondant
1 PE2M - Physiologie et Ecophysiologie des Mollusques Marins
2 PE2M - Physiologie et Ecophysiologie des Mollusques Marins
Abstract : Through differential screening between oyster families selected for high and low summer survival, we have characterized a new transforming growth factor-beta (TGF-beta) superfamily member. This novel factor, named oyster-gonadal-TGFbeta-like (og-TGFbeta-like), is synthesized as a 307 amino acid precursor and displays 6 of the 7 characteristic cysteine residues of the C-terminal, mature peptide. Sequence comparison revealed that og-TGFbeta-like has a low percentage of identity with other known TGF-beta superfamily members, suggesting that og-TGFbeta-like is a derived member of this large superfamily. Real-time PCR (RT-PCR) analysis in different oyster tissues showed that og-TGFbeta-like is specifically expressed in both male and female gonads, at distinct levels according to the reproductive stage. Og-TGFbeta-like relative expression was the lowest at the initiation of the reproductive cycle and increased as maturation proceeded to achieve a maximal level in fully mature female and male oysters. In situ hybridisation demonstrated that expression was exclusively detected in the somatic cells surrounding oocytes and spermatocytes. The role of this newly-characterized TGFbeta member in the reproduction of cupped oyster is discussed in regard to the specificity and the localization of its expression, which singularly contrasts with the pleiotropic roles in a variety of physiological processes commonly ascribed to most TGF-beta family members identified so far.
Keywords : valve mollusc Transforming growth factor Gene expression Oyster Reproduction
Type de document :
Article dans une revue
Gene, Elsevier, 2008, 410 (1), pp.187-96. 〈10.1016/j.gene.2007.12.017〉
Liste complète des métadonnées
http://hal.univ-brest.fr/hal-00654333
Contributeur : Catherine Bertignac <>
Soumis le : mercredi 21 décembre 2011 - 16:17:45
Dernière modification le : mercredi 6 juin 2018 - 01:24:52

Identifiants

Collections

UNIV-BREST | COMUE-NORMANDIE

Citation

Elodie Fleury, Caroline Fabioux, Christophe Lelong, Pascal Favrel, Arnaud Huvet. Characterization of a gonad-specific transforming growth factor-beta superfamily member differentially expressed during the reproductive cycle of the oyster Crassostrea gigas.. Gene, Elsevier, 2008, 410 (1), pp.187-96. 〈10.1016/j.gene.2007.12.017〉. 〈hal-00654333〉

Exporter

BibTeX TEI DC DCterms EndNote

Partager

Métriques

Consultations de la notice

171

Contact

support.ccsd.cnrs.fr
hal.support@ccsd.cnrs.fr
Logo CCSD