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Myostatin (MSTN) is an important member of the transforming growth factor-β (TGF-β) superfamily and is a muscle growth inhibitor. In the present study, we cloned the Chinese perch MSTN cDNA sequence and analyzed its expression patterns under various conditions. The MSTN full cDNA sequence was 3347 bp long, including an open-reading frame of 1131 bp, which encoded 376 amino acids. Sequence analysis demonstrated that the MSTN shared a highly conserved signal peptide, a TGF-β functional peptide, a hydrolytic site (RARR), and nine conservative cysteine residues with other members of the TGF-β superfamily. Sequence alignment and phylogenetic tree analyses indicated that the MSTN had a close relationship with teleostean fish, but they are far separated from mammals. Real-time polymerase chain reaction analysis revealed that the MSTN was strongly expressed in the skeletal muscle and heart tissues. Temporal expression analysis demonstrated that the MSTN gene was expressed in very low levels, from 20 to 90 dph (post-hatching development), and was at its highest level at 150 dph (P &lt; 0.05). The fasting-re-feeding experiment showed that the expression of the MSTN gene was initially decreased in response to a single meal, after seven days of fasting, and subsequently increased significantly, and finally decreased back to its original level. Together, our results provided valuable knowledge regarding the regulation of MSTN gene expression in Chinese perch.

Molecular characterization of the myosatin gene and the effect of fasting on its expression in Chinese perch (Siniperca chuatsi)