Coping with Anoxia: A Comprehensive Proteomic and Transcriptomic Survey of Denitrification
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- 作者：Yvonne Kohlmann ; Anne Pohlmann ; Edward Schwartz ; Daniela Z眉hlke ; Andreas Otto ; Dirk Albrecht ; Christina Grimmler ; Armin Ehrenreich ; Birgit Voigt ; D枚rte Becher ; Michael Hecker ; B盲rbel Friedrich ; Rainer Cramm
- 刊名：Journal of Proteome Research
- 出版年：2014
- 出版时间：October 3, 2014
- 年：2014
- 卷：13
- 期：10
- 页码：4325-4338
- 全文大小：472K
- ISSN：1535-3907
文摘
Ralstonia eutropha H16 is a denitrifying microorganism able to use nitrate and nitrite as terminal electron acceptors under oxygen deprivation. To identify proteins showing an altered expression pattern in response to oxygen supply, R. eutropha cells grown aerobically and anaerobically were compared in a comprehensive proteome and transcriptome approach. Nearly 700 proteins involved in several processes including respiration, formation of cell appendages, and DNA and cofactor biosynthesis were found to be differentially expressed. A combination of 1D gel-LC and conventional 2D gel analysis of six consecutive sample points covering the entire denitrification sequence revealed a detailed view on the shifting abundance of the key proteins of denitrification. Denitrification- or anaerobiosis-induced alterations of the respiratory chain included a distinct expression pattern for multiple terminal oxidases. Alterations in the central carbon metabolism were restricted to a few key functions including the isoenzymes for aconitase and isocitrate dehydrogenase. Although R. eutropha is a strictly respiratory bacterium, the abundance of certain fermentation enzymes was increased. This work represents a comprehensive survey of denitrification on the proteomic and transcriptomic levels and provides unique insight into how R. eutropha adapts its metabolism to low oxygen conditions.