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Four plant defensins from an indigenous South African Brassicaceae species display divergent activities against two test pathogens despite high sequence similarity in the encoding genes by Abré de Beer; Melané A Vivier is a Medicine article available to read on EtoBox.

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## Background Plant defensins are an important component of the innate defence system of plants where they form protective antimicrobial barriers between tissue types of plant organs as well as around seeds. These peptides also have other activities that are important for agricultural applications as well as the medical sector. Amongst the numerous plant peptides isolated from a variety of plant species, a significant number of promising defensins have been isolated from Brassicaceae species. Here we report on the isolation and characterization of four defensins from __Heliophila coronopifolia__, a native South African Brassicaceae species. ## Results Four defensin genes (__Hc-AFP1__-__4)__ were isolated with a homology based PCR strategy. Analysis of the deduced amino acid sequences showed that the peptides were 72% similar and grouped closest to defensins isolated from other Brassicaceae species. The Hc-AFP1 and 3 peptides shared high homology (94%) and formed a unique grouping in the Brassicaceae defensins, whereas Hc-AFP2 and 4 formed a second homology grouping with defensins from __Arabidopsis__ and __Raphanus__. Homology modelling showed that the few amino acids that differed

Who reads Four plant defensins from an indigenous South African Brassicaceae species display divergent activities against two test pathogens despite high sequence similarity in the encoding genes?

Author

Abré de Beer; Melané A Vivier

Publisher

BioMed Central; Springer (Biomed Central Ltd.); London: Biomed Central, 2008-; Publons; Springer Science and Business Media LLC; Society for Mining, Metallurgy and Exploration Inc. (ISSN 1756-0500)

Published

2011

Language

EN

Field

Medicine (Health Sciences)