Construction and Physiological Analysis of a Xanthomonas Mutant To Examine the Role of the oxyR Gene in Oxidant-Induced Protection against Peroxide Killing-Reference-Cited by-同舟云学术

Construction and Physiological Analysis of a Xanthomonas Mutant To Examine the Role of the oxyR Gene in Oxidant-Induced Protection against Peroxide Killing

Published:1998-08 Issue:15 Volume:180 Page:3988-3991
ISSN:0021-9193
Container-title:Journal of Bacteriology
language:en
Short-container-title:J Bacteriol

Author:

Mongkolsuk Skorn¹²,Sukchawalit Rojana¹,Loprasert Suvit¹,Praituan Wipa¹,Upaichit Apichat²

Affiliation:

1. Laboratory of Biotechnology, Chulabhorn Research Institute, Lak Si, Bangkok 10210,1 and

2. Department of Biotechnology, Faculty of Science, Mahidol University, Rama 6 Rd, Bangkok 10400,2 Thailand

Abstract

ABSTRACT We constructed and characterized a Xanthomonas campestris pv. phaseoli oxyR mutant. The mutant was hypersensitive to H 2 O 2 and menadione killing and had reduced aerobic plating efficiency. The oxidants’ induction of the catalase and ahpC genes was also abolished in the mutant. Analysis of the adaptive responses showed that hydrogen peroxide-induced protection against hydrogen peroxide was lost, while menadione-induced protection against hydrogen peroxide was retained in the oxyR mutant. These results show that X. campestris pv. phaseoli oxyR is essential to peroxide adaptation and revealed the existence of a novel superoxide-inducible peroxide protection system that is independent of OxyR.

Publisher

American Society for Microbiology

Subject

Molecular Biology,Microbiology

Link

https://journals.asm.org/doi/pdf/10.1128/JB.180.15.3988-3991.1998

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