High-Yield Soluble Expression and Simple Purification of the Antimicrobial Peptide OG2 Using the Intein System in Escherichia coli
OG2 is a modified antimicrobial peptide, that is, derived from the frog peptide Palustrin-OG1. It has high antimicrobial activity and low cytotoxicity, and it is therefore promising as a therapeutic agent. Both prokaryotic (Escherichia coli) and eukaryotic (Pichia pastoris) production host systems w...
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doaj-9f6d7d8a35a14749abc7a8d86edc578d2020-11-24T22:43:58ZengHindawi LimitedBioMed Research International2314-61332314-61412013-01-01201310.1155/2013/754319754319High-Yield Soluble Expression and Simple Purification of the Antimicrobial Peptide OG2 Using the Intein System in Escherichia coliYong-Gang Xie0Fei-Fei Han1Chao Luan2Hai-Wen Zhang3Jie Feng4Young-Jun Choi5Denis Groleau6Yi-Zhen Wang7Key Laboratory of Animal Nutrition and Feed Science of Ministry of Agriculture, Key Laboratory of Feed and Animal Nutrition of Zhejiang Province, Institute of Feed Science, Zhejiang University, Hangzhou, Zhejiang 310058, ChinaKey Laboratory of Animal Nutrition and Feed Science of Ministry of Agriculture, Key Laboratory of Feed and Animal Nutrition of Zhejiang Province, Institute of Feed Science, Zhejiang University, Hangzhou, Zhejiang 310058, ChinaKey Laboratory of Animal Nutrition and Feed Science of Ministry of Agriculture, Key Laboratory of Feed and Animal Nutrition of Zhejiang Province, Institute of Feed Science, Zhejiang University, Hangzhou, Zhejiang 310058, ChinaKey Laboratory of Animal Nutrition and Feed Science of Ministry of Agriculture, Key Laboratory of Feed and Animal Nutrition of Zhejiang Province, Institute of Feed Science, Zhejiang University, Hangzhou, Zhejiang 310058, ChinaKey Laboratory of Animal Nutrition and Feed Science of Ministry of Agriculture, Key Laboratory of Feed and Animal Nutrition of Zhejiang Province, Institute of Feed Science, Zhejiang University, Hangzhou, Zhejiang 310058, ChinaBiotechnology Research Institute, National Research Council, Montreal, QC, H4P 2R2, CanadaChemical and Biotechnological Engineering, University of Sherbrooke, Sherbrooke, QC, J1K 2R1, CanadaKey Laboratory of Animal Nutrition and Feed Science of Ministry of Agriculture, Key Laboratory of Feed and Animal Nutrition of Zhejiang Province, Institute of Feed Science, Zhejiang University, Hangzhou, Zhejiang 310058, ChinaOG2 is a modified antimicrobial peptide, that is, derived from the frog peptide Palustrin-OG1. It has high antimicrobial activity and low cytotoxicity, and it is therefore promising as a therapeutic agent. Both prokaryotic (Escherichia coli) and eukaryotic (Pichia pastoris) production host systems were used to produce OG2 in our previous study; however, it was difficult to achieve high expression yields and efficient purification. In this study, we achieved high-yield OG2 expression using the intein fusion system. The optimized OG2 gene was cloned into the pTWIN1 vector to generate pTWIN-OG2-intein2 (C-terminal fusion vector) and pTWIN-intein1-OG2 (N-terminal fusion vector). Nearly 70% of the expressed OG2-intein2 was soluble after the IPTG concentration and induction temperature were decreased, whereas only 42% of the expressed of intein1-OG2 was soluble. Up to 75 mg of OG2-intein2 was obtained from a 1 l culture, and 85% of the protein was cleaved by 100 mM DTT. Intein1-OG2 was less amenable to cleavage due to the inhibition of cleavage by the N-terminal amino acid of OG2. The purified OG2 exhibited strong antimicrobial activity against E. coli K88. The intein system is the best currently available system for the cost-effective production of OG2.http://dx.doi.org/10.1155/2013/754319 |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Yong-Gang Xie Fei-Fei Han Chao Luan Hai-Wen Zhang Jie Feng Young-Jun Choi Denis Groleau Yi-Zhen Wang |
spellingShingle |
Yong-Gang Xie Fei-Fei Han Chao Luan Hai-Wen Zhang Jie Feng Young-Jun Choi Denis Groleau Yi-Zhen Wang High-Yield Soluble Expression and Simple Purification of the Antimicrobial Peptide OG2 Using the Intein System in Escherichia coli BioMed Research International |
author_facet |
Yong-Gang Xie Fei-Fei Han Chao Luan Hai-Wen Zhang Jie Feng Young-Jun Choi Denis Groleau Yi-Zhen Wang |
author_sort |
Yong-Gang Xie |
title |
High-Yield Soluble Expression and Simple Purification of the Antimicrobial Peptide OG2 Using the Intein System in Escherichia coli |
title_short |
High-Yield Soluble Expression and Simple Purification of the Antimicrobial Peptide OG2 Using the Intein System in Escherichia coli |
title_full |
High-Yield Soluble Expression and Simple Purification of the Antimicrobial Peptide OG2 Using the Intein System in Escherichia coli |
title_fullStr |
High-Yield Soluble Expression and Simple Purification of the Antimicrobial Peptide OG2 Using the Intein System in Escherichia coli |
title_full_unstemmed |
High-Yield Soluble Expression and Simple Purification of the Antimicrobial Peptide OG2 Using the Intein System in Escherichia coli |
title_sort |
high-yield soluble expression and simple purification of the antimicrobial peptide og2 using the intein system in escherichia coli |
publisher |
Hindawi Limited |
series |
BioMed Research International |
issn |
2314-6133 2314-6141 |
publishDate |
2013-01-01 |
description |
OG2 is a modified antimicrobial peptide, that is, derived from the frog peptide Palustrin-OG1. It has high antimicrobial activity and low cytotoxicity, and it is therefore promising as a therapeutic agent. Both prokaryotic (Escherichia coli) and eukaryotic (Pichia pastoris) production host systems were used to produce OG2 in our previous study; however, it was difficult to achieve high expression yields and efficient purification. In this study, we achieved high-yield OG2 expression using the intein fusion system. The optimized OG2 gene was cloned into the pTWIN1 vector to generate pTWIN-OG2-intein2 (C-terminal fusion vector) and pTWIN-intein1-OG2 (N-terminal fusion vector). Nearly 70% of the expressed OG2-intein2 was soluble after the IPTG concentration and induction temperature were decreased, whereas only 42% of the expressed of intein1-OG2 was soluble. Up to 75 mg of OG2-intein2 was obtained from a 1 l culture, and 85% of the protein was cleaved by 100 mM DTT. Intein1-OG2 was less amenable to cleavage due to the inhibition of cleavage by the N-terminal amino acid of OG2. The purified OG2 exhibited strong antimicrobial activity against E. coli K88. The intein system is the best currently available system for the cost-effective production of OG2. |
url |
http://dx.doi.org/10.1155/2013/754319 |
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