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Permanent link (DOI): https://doi.org/10.7939/R32B8VR43

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Metabolic flexibility revealed in the genome of the cyst-forming α-1 proteobacterium Rhodospirillum centenum Open Access

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Author or creator
Lu, Yih-Kuang
Marden, Jeremiah
Han, Mira
Swingley, Wesley D.
Mastrian, Stephen D.
Chowdhury, Sugata R.
Hao, Jicheng
Helmy,Tamer
Kim, Sun
Kurdoglu, Ahmet A.
Matthies, Heather J.
Rollo, David
Stothard, Paul
Blankenship, Robert E.
Bauer, Carl E.
Touchman, Jeffrey W.
Additional contributors
Subject/Keyword
Chlorophyll/Biosynthesis
Photosynthesis/Genetics
Signal Transduction/Genetics
Rhodospirillum Centenum/Metabolism
Bacterial Proteins/Metabolism
Genome, Bacterial/Genetics
Flagella/Metabolism
Photoreceptors, Microbial/Metabolism
Chemotaxis/Genetics
Rhodospirillum Centenum/Genetics
Carbon/Metabolism
Rhodospirillum Centenum/Cytology
Bacterial Proteins/Genetics
Photoreceptors, Microbial/Genetics
Flagella/Genetics
Type of item
Journal Article (Published)
Language
English
Place
Time
Description
Background Rhodospirillum centenum is a photosynthetic non-sulfur purple bacterium that favors growth in an anoxygenic, photosynthetic N2-fixing environment. It is emerging as a genetically amenable model organism for molecular genetic analysis of cyst formation, photosynthesis, phototaxis, and cellular development. Here, we present an analysis of the genome of this bacterium. Results R. centenum contains a singular circular chromosome of 4,355,548 base pairs in size harboring 4,105 genes. It has an intact Calvin cycle with two forms of Rubisco, as well as a gene encoding phosphoenolpyruvate carboxylase (PEPC) for mixotrophic CO2 fixation. This dual carbon-fixation system may be required for regulating internal carbon flux to facilitate bacterial nitrogen assimilation. Enzymatic reactions associated with arsenate and mercuric detoxification are rare or unique compared to other purple bacteria. Among numerous newly identified signal transduction proteins, of particular interest is a putative bacteriophytochrome that is phylogenetically distinct from a previously characterized R. centenum phytochrome, Ppr. Genes encoding proteins involved in chemotaxis as well as a sophisticated dual flagellar system have also been mapped. Conclusions Remarkable metabolic versatility and a superior capability for photoautotrophic carbon assimilation is evident in R. centenum.
Date created
2010
DOI
doi:10.7939/R32B8VR43
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Attribution 4.0 International
Citation for previous publication
Lu, Y. K., Marden, J., Han, M., Swingley, W. D., Mastrian, S. D., Chowdhury, S. R., Hao, J., Helmy, T., Kim, S., Kurdoglu, A. A., Matthies, H. J., Rollo, D., Stothard, P., Blankenship, R. E., Bauer, C. E., & Touchman, J. W. (2010). Metabolic flexibility revealed in the genome of the cyst-forming α-1 proteobacterium Rhodospirillum centenum. BMC Genomics, 11(325), [12 pages].  http://dx.doi.org/10.1186/1471-2164-11-325

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