Molecular cloning, expression, and functional analysis of caspase-10 from Japanese flounder Paralichthys olivaceus |
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Authors: | Kurobe Tomofumi Hirono Ikuo Kondo Hidehiro Yamashita Michiaki Aoki Takashi |
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Institution: | Laboratory of Genome Science, Graduate School of Marine Science and Technology, Tokyo University of Marine Science and Technology, Konan 4-5-7, Minato, Tokyo 108-8477, Japan. |
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Abstract: | We isolated and sequenced caspase-10 cDNA and gene from Japanese flounder, Paralichthys olivaceus. The Japanese flounder (JF)-caspase-10 cDNA consisted of 2282 bp and encoded 495 amino acid residues. The characteristic death effector domains (DEDs) of caspases were observed in JF-caspase-10 as well as the three aspartic acid residues (D-186, -382 and -392), which are potential cleavage sites for the large and small subunit structures. The amino acid residue (His-325) and pentapeptide (QACQG), which are involved in catalytic activity, were absolutely conserved in Japanese flounder-caspase-10. JF-caspase-10 gene has a length of 6.6 kb and consists of 11 exons and 10 introns similar to that of human. The strong expression of JF-caspase-10 mRNA was detected in the gills, peripheral blood leukocytes, spleen and posterior kidney, while the weak expression was observed in the head kidney, heart, intestine, skin and stomach. The over-expression analysis of JF-caspase-10 in Japanese flounder cell line HINAE was shown to induce apoptosis 24h post-transfection using TUNEL assay. |
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Keywords: | Caspase-10 Japanese flounder (Paralichthys olivaceus) Gene cloning RT-PCR Over-expression analysis TUNEL assay |
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