Cloning of the sole (Solea senegalensis) growth hormone-encoding cDNA

Abstract

We report here the complete nucleotide (nt) sequence of a cDNA clone encoding Solea senegalensis growth hormone (sGH) isolated from an expression library prepared from sole pituitary gland poly (A)+ RNA. The library was screened using a flounder GH cDNA. The cDNA sequence containing an insert of 769 nt was found to encode a polypeptide of 203 amino acids (aa), including a signal peptide of 17 aa. The 5′- and 3′-untranslated regions of the message are 17 and 119-nt long, respectively. Northern blot hybridization detected a 0.9-kb RNA species. The sGH cDNA sequence shows homologies of 80.9, 76.9, 73.8 and 64.2% with the GH of tuna, gilthead seabream, flounder and rainbow trout.