Abstract
The mRNA encoding chymotrypsin-like serine protease (Mj-chy) from a kuruma shrimp Marsupenaeus japonicus hepatopancreas was identified as a peptidoglycan-inducible gene by 5′-end serial analysis of gene expression. The transcript of Mj-chy consists of a 816-nucleotide open reading frame encoding 271 amino acids, including a signal peptide of 17 amino acids and a trypsin-like serine protease domain of 219 amino acids. Like most serine proteases, Mj-chy has a catalytic triad consisting of histidine, aspartic acid and serine, and six cysteine residues forming three disulfide bridges. In a phylogenetic analysis, the trypsin-like serine protease domain clustered with invertebrate chymotrypsins and was closely related to chymotrypsin-like serine protease from Chinese shrimp Fenneropenaeus chinensis and chymotrypsin BI from Pacific white shrimp Litopenaeus vannamei. Mj-chy was detected in the hepatopancreas, stomach and intestine, and exhibited increased expression in defense-related tissues (i.e., hemocytes, lymphoid organ and hepatopancreas) after peptidoglycan stimulation.
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Acknowledgments
This study was supported in part by grants from the Ministry of Agriculture, Forestry, and Fisheries of Japan and Grants in-Aid for Scientific Research from the Ministry of Education, Culture, Sports, Science and Technology of Japan. The authors especially thank Mr. Fernand F. Fagutao for proofreading the manuscript.
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Danwattananusorn, T., Kondo, H., Aoki, T. et al. Molecular cloning, characterization and expression analysis of a chymotrypsin-like serine protease from kuruma shrimp Marsupenaeus japonicus . Fish Sci 75, 1231–1238 (2009). https://doi.org/10.1007/s12562-009-0159-0
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DOI: https://doi.org/10.1007/s12562-009-0159-0