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Article Dans Une Revue Gene Année : 2014

Molecular evolution of the androgenic hormone in terrestrial isopods.

Nicolas Cerveau
  • Fonction : Auteur
Didier Bouchon
Thierry Berges
  • Fonction : Auteur

Résumé

: In crustaceans, the androgenic gland (AG), thanks to the synthesis of the androgenic gland hormone (AGH), controls the differentiation of the primary and secondary male sexual characters. In this study, we amplified 12 new AGH cDNAs in species belonging to five different families of the infra-order Ligiamorpha of terrestrial isopods. Putative essential amino acids for the production of a functional AGH protein exhibit signatures of negative selection and are strictly conserved including typical proteolytic cleavage motifs, a putative N-linked glycosylation motif on the A chains and the eight Cys positions. An insulin-like growth factor motif was also identified in Armadillidium AGH sequences. The phylogenetic relationships of AGH sequences allowed to distinguish two main clades, corresponding to members of the Armadillidiidae and the Porcellionidae families which is congruent with the narrow specificity of AG heterospecific grafting. An in-depth understanding of the regulation of AGH expression would help deciphering the interaction between Wolbachia, a widespread feminizing endosymbiotic bacteria in isopods, and the sex differentiation of their hosts.
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Dates et versions

hal-00955954 , version 1 (05-03-2014)

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Nicolas Cerveau, Didier Bouchon, Thierry Berges, Pierre Greve. Molecular evolution of the androgenic hormone in terrestrial isopods.. Gene, 2014, 540, pp.71-77. ⟨10.1016/j.gene.2014.02.024⟩. ⟨hal-00955954⟩
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