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Molecules 2015, 20(8), 14889-14901;

Recombinant Production of Snakin-2 (an Antimicrobial Peptide from Tomato) in E. coli and Analysis of Its Bioactivity

Institute of Pharmacy and Molecular Biotechnology (IPMB), Heidelberg University, Im Neuenheimer Feld 364, D-69120 Heidelberg, Germany
Author to whom correspondence should be addressed.
Academic Editor: Thomas J. Schmidt
Received: 17 June 2015 / Revised: 11 August 2015 / Accepted: 12 August 2015 / Published: 14 August 2015
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Antimicrobial peptides (AMPs) represent a diverse group of biologically active molecules that are part of the innate immune systems of a variety of organisms. Their primary function consists of protecting the host organism against invading microorganisms, including pathogens. AMPs show a broad spectrum of secondary structures, which are essential for antimicrobial activity. In this study, we produced snakin-2 (SN2), a 66-amino-acid-(aa)-long AMP from Solanum lycopersicum as a recombinant protein in E. coli. This AMP belongs to the GASA/GAST protein family and possesses a highly conserved 60-aa-long domain with six disulfide bonds in the C-terminus of the peptide. Because of the toxicity of SN2 against its producing E. coli strain, the AMP was attached to an N-terminal fusion protein (thioredoxin A), which was removed after affinity chromatography purification. The total yield of recombinant SN2 was approximately 1 mg/L. The membrane-active SN2 showed a bactericidal and fungicidal bioactivity, which can be explained by perforation of biomembranes of bacteria and fungi. View Full-Text
Keywords: snakin-2; antimicrobial peptide; Escherichia coli; recombinant expression snakin-2; antimicrobial peptide; Escherichia coli; recombinant expression

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Herbel, V.; Schäfer, H.; Wink, M. Recombinant Production of Snakin-2 (an Antimicrobial Peptide from Tomato) in E. coli and Analysis of Its Bioactivity. Molecules 2015, 20, 14889-14901.

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