Isolation and characterization of the complete cDNA sequence encoding a putative insulin-like peptide from the androgenic gland of< i> Penaeus monodon Academic Article uri icon

abstract

  • Sexual differentiation in male crustaceans is known to be controlled by the androgenic gland (AG), possibly through a peptide hormone. Recently, three freshwater and one marine crustacean decapod genes encoding AG-specific insulin-like peptides were characterized. We report here the molecular cloning of the complete sequence encoding an AG-specific insulin-like peptide (Pm-IAG) in the commercially important marine Penaeid prawn, Penaeus monodon. The deduced precursor sequence consists of a signal peptide, B chain, C peptide and an A chain. It exhibits the same structural organization as that of previously identified crustacean insulin-like androgenic gland specific peptides (IAGs). The positions of cysteine residues of the putative A and B chains, which govern the folding of the mature peptide via the formation of disulfide bridges, are highly conserved among the prawn and other …

publication date

  • August 8, 2011