지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2011.1
- 수록면
- 871 - 880 (10page)
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초록· 키워드
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The only human antimicrobial peptide, LL-37, was overexpressed in soluble form using $Escherichia$ $coli$-based expression system. Recombinant LL-37 production in $E.$ $coli$ was optimized for use in large quantities for studying antimicrobial activity against $Helicobacter$ $pylori$ strains. We previously reported a method to express and purify LL-37 using Glutathione $S$-transferase (GST) fusion system. Herein presents method suitable for producing recombinant LL-37 from the recombinant GST-LL-37 fusion protein by recovering from both soluble protein fractions and inclusion bodies. Compared to the yield reported previously, the yield of recombinant GST-LL-37 protein was much improved to 10 mg/L of culture by affinity chromatography using GSTrap FF (1 mL) affinity chromatography column. These results suggest that the production method used in present study is useful in obtaining large quantity of recombinant LL-37 peptide. The optimized recovery protocol from inclusion bodies was highly contributable in raising yield of GST-LL-37 fusion protein. When treated with Factor Xa, GST-LL-37 fusion protein recovered from both soluble protein fractions and inclusion bodies released an approximate 4.5-kDa protein, which was the expected size of LL-37; GST-LL-37 fusion protein recovered from both soluble protein fractions and inclusion bodies was also confirmed by enzymatic digestion with thrombin, which produced LL-37 peptide containing six extra amino acid residues, Gly-Ile-Ile-Glu-Gly-Arg, on N-terminus of LL-37. Purified recombinant LL-37 showed nearly identical antimicrobial activities against $H.$ $pylori$ strains as that of synthetic LL-37, suggesting its application to functional study with therapeutic potential on gastric pathogen.
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