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1: Science. 2007 Oct 26;318(5850):645-8.
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Plant pathogen recognition mediated by promoter activation of the pepper Bs3 resistance gene.

Römer P, Hahn S, Jordan T, Strauss T, Bonas U, Lahaye T.

Institute of Biology, Department of Genetics, Martin-Luther-University Halle-Wittenberg, D-06099 Halle (Saale), Germany.

Plant disease resistance (R) proteins recognize matching pathogen avirulence proteins. Alleles of the pepper R gene Bs3 mediate recognition of the Xanthomonas campestris pv. vesicatoria (Xcv) type III effector protein AvrBs3 and its deletion derivative AvrBs3Deltarep16. Pepper Bs3 and its allelic variant Bs3-E encode flavin monooxygenases with a previously unknown structure and are transcriptionally activated by the Xcv effector proteins AvrBs3 and AvrBs3Deltarep16, respectively. We found that recognition specificity resides in the Bs3 and Bs3-E promoters and is determined by binding of AvrBs3 or AvrBs3Deltarep16 to a defined promoter region. Our data suggest a recognition mechanism in which the Avr protein binds and activates the promoter of the cognate R gene.

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PMID: 17962564 [PubMed - indexed for MEDLINE]