恶臭假单胞菌MnB1中的c型细胞色素与锰氧化作用
c-type cytochromes and manganese oxidation in Pseudomonas putida MnB1.
作者信息
Caspi R, Tebo B M, Haygood M G
机构信息
Scripps Institution of Oceanography, University of California in San Diego, La Jolla, California 92093-0202, USA.
出版信息
Appl Environ Microbiol. 1998 Oct;64(10):3549-55. doi: 10.1128/AEM.64.10.3549-3555.1998.
Abstract
Pseudomonas putida MnB1 is an isolate from an Mn oxide-encrusted pipeline that can oxidize Mn(II) to Mn oxides. We used transposon mutagenesis to construct mutants of strain MnB1 that are unable to oxidize manganese, and we characterized some of these mutants. The mutants were divided into three groups: mutants defective in the biogenesis of c-type cytochromes, mutants defective in genes that encode key enzymes of the tricarboxylic acid cycle, and mutants defective in the biosynthesis of tryptophan. The mutants in the first two groups were cytochrome c oxidase negative and did not contain c-type cytochromes. Mn(II) oxidation capability could be recovered in a c-type cytochrome biogenesis-defective mutant by complementation of the mutation.
摘要
恶臭假单胞菌MnB1是从一条被锰氧化物包裹的管道中分离出来的，它能够将二价锰氧化为锰氧化物。我们利用转座子诱变构建了无法氧化锰的MnB1菌株突变体，并对其中一些突变体进行了表征。这些突变体被分为三组：c型细胞色素生物合成缺陷型突变体、编码三羧酸循环关键酶的基因突变缺陷型突变体和色氨酸生物合成缺陷型突变体。前两组中的突变体细胞色素c氧化酶呈阴性，且不含有c型细胞色素。通过对c型细胞色素生物合成缺陷型突变体的突变进行互补，可以恢复其二价锰氧化能力。
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