Jamet Alexandre, Kiss Ernö, Batut Jacques, Puppo Alain, Hérouart Didier
Laboratoire Interactions Plantes-Microorganismes et Santé Végétele, UMR, INRA, Université de Nice Sophia-Antipolis, CNRS, 400 Route des Chappes, BP 167, F-06903 Sophia Antipolis Cedex, France.
J Bacteriol. 2005 Jan;187(1):376-81. doi: 10.1128/JB.187.1.376-381.2005.
The characterization of an oxyR insertion mutant provides evidences that katA, which encodes the unique H2O2-inducible HPII catalase, is regulated by OxyR not only in free-living Sinorhizobium meliloti but also in symbiotic S. meliloti. Moreover, oxyR is expressed independently of exogenous H2O2 and downregulates its own expression in S. meliloti.
一个oxyR插入突变体的特性分析提供了证据,表明编码独特的H2O2诱导型HPII过氧化氢酶的katA不仅在自由生活的苜蓿中华根瘤菌中受OxyR调控,在共生的苜蓿中华根瘤菌中也受其调控。此外,oxyR在苜蓿中华根瘤菌中的表达不依赖于外源H2O2,并且会下调其自身的表达。