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Volume 15 Issue 6
Nov.  2024
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XU Yangyu, LIU Fuxiang, HONG Yanbin, CHEN Xiaoping, LI Haifeng, WEN Shijie, LI Xingyu, LI Ling, LIANG Xuanqiang. The cloning and prokaryotic expression of the alkaline protease gene TvALP from Trichoderma viride[J]. Journal of Tropical Biology, 2024, 15(6): 683-690. doi: 10.15886/j.cnki.rdswxb.20240077
Citation: XU Yangyu, LIU Fuxiang, HONG Yanbin, CHEN Xiaoping, LI Haifeng, WEN Shijie, LI Xingyu, LI Ling, LIANG Xuanqiang. The cloning and prokaryotic expression of the alkaline protease gene TvALP from Trichoderma viride[J]. Journal of Tropical Biology, 2024, 15(6): 683-690. doi: 10.15886/j.cnki.rdswxb.20240077

The cloning and prokaryotic expression of the alkaline protease gene TvALP from Trichoderma viride

doi: 10.15886/j.cnki.rdswxb.20240077
  • Received Date: 2024-05-05
  • Rev Recd Date: 2024-06-15
  • A peptide sequence was identified from antimicrobial proteins in Trichoderma viride based on the denovo mass spectrometry determination. Through BLASTp database searching, it was found that this peptide sequence is encoded by a alkaline proteinase gene, and the target gene fragment was amplified using homologybased cloning. Bioinformatics analysis reveals that the TvALP gene(GenBank number KJ659907) has a complete open reading frame of 1 230 bp and encodes a protein composed of 409 amino acids. This protein has a predicted molecular weight of about 43 kD, and an isoelectric point of 7.96, and contains a signal peptide composed of 20amino acids. According to classification, the protein belongs to the peptidase inhibitor_I9 superfamily and is a member of the subtilisin serine protease S8 family. The sequenced plasmid was ligated into the prokaryotic expression vector pET30a using double digestion, and the expression was induced in the host bacterium BL21(DE3)pLysS. The result showed a specific protein band at 45 kD, which was consistent with the predicted size of the target protein, indicating that the expression plasmid pET30a-ΔTvALP(“Δ” Signaling peptide excision) was successfully expressed in the host bacterium BL21(DE3)pLysS. After sonication, the protein formed inclusion bodies. However, after in vitro renaturation, no active protein was obtained for antibacterial mechanism research.
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The cloning and prokaryotic expression of the alkaline protease gene TvALP from Trichoderma viride

doi: 10.15886/j.cnki.rdswxb.20240077

Abstract: A peptide sequence was identified from antimicrobial proteins in Trichoderma viride based on the denovo mass spectrometry determination. Through BLASTp database searching, it was found that this peptide sequence is encoded by a alkaline proteinase gene, and the target gene fragment was amplified using homologybased cloning. Bioinformatics analysis reveals that the TvALP gene(GenBank number KJ659907) has a complete open reading frame of 1 230 bp and encodes a protein composed of 409 amino acids. This protein has a predicted molecular weight of about 43 kD, and an isoelectric point of 7.96, and contains a signal peptide composed of 20amino acids. According to classification, the protein belongs to the peptidase inhibitor_I9 superfamily and is a member of the subtilisin serine protease S8 family. The sequenced plasmid was ligated into the prokaryotic expression vector pET30a using double digestion, and the expression was induced in the host bacterium BL21(DE3)pLysS. The result showed a specific protein band at 45 kD, which was consistent with the predicted size of the target protein, indicating that the expression plasmid pET30a-ΔTvALP(“Δ” Signaling peptide excision) was successfully expressed in the host bacterium BL21(DE3)pLysS. After sonication, the protein formed inclusion bodies. However, after in vitro renaturation, no active protein was obtained for antibacterial mechanism research.

XU Yangyu, LIU Fuxiang, HONG Yanbin, CHEN Xiaoping, LI Haifeng, WEN Shijie, LI Xingyu, LI Ling, LIANG Xuanqiang. The cloning and prokaryotic expression of the alkaline protease gene TvALP from Trichoderma viride[J]. Journal of Tropical Biology, 2024, 15(6): 683-690. doi: 10.15886/j.cnki.rdswxb.20240077
Citation: XU Yangyu, LIU Fuxiang, HONG Yanbin, CHEN Xiaoping, LI Haifeng, WEN Shijie, LI Xingyu, LI Ling, LIANG Xuanqiang. The cloning and prokaryotic expression of the alkaline protease gene TvALP from Trichoderma viride[J]. Journal of Tropical Biology, 2024, 15(6): 683-690. doi: 10.15886/j.cnki.rdswxb.20240077
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