The mode of action of the plant antimicrobial peptide MiAMP1 differs from that of its structural homologue, the yeast killer toxin WmKT.

Abstract:

:The plant antimicrobial peptide MiAMP1 from Macadamia integrifolia and the yeast killer toxin peptide WmKT from Williopsis mrakii are structural homologues. Comparative studies of yeast mutants were performed to test their sensitivity to these two antimicrobial peptides. No differences in susceptibility to MiAMP1 were detected between wild-type and several WmKT-resistant mutant yeast strains. A yeast mutant MT1, resistant to MiAMP1 but unaffected in its susceptibility to plant defensins and hydrogen peroxide, also did not show enhanced tolerance towards WmKT. It is therefore probable that the Greek key beta-barrel structure shared by MiAMP1 and WmKT provides a robust structural framework ensuring stability for the two proteins but that the specific action of the peptides depends on other motifs.

journal_name

FEMS Microbiol Lett

authors

Stephens C,Kazan K,Goulter KC,Maclean DJ,Manners JM

doi

10.1016/j.femsle.2004.12.007

keywords:

subject

Has Abstract

pub_date

2005-02-01 00:00:00

pages

205-10

issue

1

eissn

0378-1097

issn

1574-6968

pii

S0378-1097(04)00895-X

journal_volume

243

pub_type

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