Heterologous Expression Systems for Plant Defensin Expression: Examples of Success and Pitfalls

Author(s): Luiz Rodrigo Saldanha Gazzaneo, Valesca Pandolfi, Andre Luiz Santos de Jesus, Sergio Crovella, Ana Maria Benko-Iseppon, Antonio Carlos de Freitas.

Journal Name: Current Protein & Peptide Science

Volume 18 , Issue 4 , 2017

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Abstract:

Defensins are a superfamily of antimicrobial peptides, present in vertebrates, invertebrates, fungi and plants, suggesting that they appeared prior to the divergence in eukaryotes. The destitution of toxicity to mammalian cells of plant defensins has led to a new research ground, i.e., their potential medical use against human infectious diseases. Isolating defensins from natural sources, like plant tissues, can be time-consuming, labor intensive and usually present low yields. Strategies for large-scale production of purified active defensins have been employed using heterologous expression systems (HES) for defensin production, usually based in E. coli system. Like any other technology, HES present limitations and drawbacks demanding a careful experimental design prior the system selection. This review is proposed to discuss some of the major concerns when choosing to heterologously express plant defensins, with special attention on bacterial expression systems.

Keywords: E. coli, fusion, carrier protein, secretion signal, inclusion bodies, antimicrobial peptides.

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Article Details

VOLUME: 18
ISSUE: 4
Year: 2017
Page: [391 - 399]
Pages: 9
DOI: 10.2174/1389203717666160625070414
Price: $58

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