| pubmed-article:16461683 | rdf:type | pubmed:Citation | lld:pubmed |
| pubmed-article:16461683 | lifeskim:mentions | umls-concept:C1077314 | lld:lifeskim |
| pubmed-article:16461683 | lifeskim:mentions | umls-concept:C0080194 | lld:lifeskim |
| pubmed-article:16461683 | lifeskim:mentions | umls-concept:C0008858 | lld:lifeskim |
| pubmed-article:16461683 | lifeskim:mentions | umls-concept:C1157851 | lld:lifeskim |
| pubmed-article:16461683 | lifeskim:mentions | umls-concept:C1555029 | lld:lifeskim |
| pubmed-article:16461683 | lifeskim:mentions | umls-concept:C0332120 | lld:lifeskim |
| pubmed-article:16461683 | pubmed:issue | 2 | lld:pubmed |
| pubmed-article:16461683 | pubmed:dateCreated | 2006-2-7 | lld:pubmed |
| pubmed-article:16461683 | pubmed:databankReference | http://linkedlifedata.com/r... | lld:pubmed |
| pubmed-article:16461683 | pubmed:abstractText | Strain MC-1 is a marine, microaerophilic, magnetite-producing, magnetotactic coccus phylogenetically affiliated with the alpha-Proteobacteria. Strain MC-1 grew chemolithotrophically with sulfide and thiosulfate as electron donors with HCO3-/CO2 as the sole carbon source. Experiments with cells grown microaerobically in liquid with thiosulfate and H14CO3-/14CO2 showed that all cell carbon was derived from H14CO3-/14CO2 and therefore that MC-1 is capable of chemolithoautotrophy. Cell extracts did not exhibit ribulose-1,5-bisphosphate carboxylase-oxygenase (RubisCO) activity, nor were RubisCO genes found in the draft genome of MC-1. Thus, unlike other chemolithoautotrophic, magnetotactic bacteria, strain MC-1 does not appear to utilize the Calvin-Benson-Bassham cycle for autotrophy. Cell extracts did not exhibit carbon monoxide dehydrogenase activity, indicating that the acetyl-coenzyme A pathway also does not function in strain MC-1. The 13C content of whole cells of MC-1 relative to the 13C content of the inorganic carbon source (Deltadelta13C) was -11.4 per thousand. Cellular fatty acids showed enrichment of 13C relative to whole cells. Strain MC-1 cell extracts showed activities for several key enzymes of the reverse (reductive) tricarboxylic acid (rTCA) cycle including fumarate reductase, pyruvate:acceptor oxidoreductase and 2-oxoglutarate:acceptor oxidoreductase. Although ATP citrate lyase (another key enzyme of the rTCA cycle) activity was not detected in strain MC-1 using commonly used assays, cell extracts did cleave citrate, and the reaction was dependent upon the presence of ATP and coenzyme A. Thus, we infer the presence of an ATP-dependent citrate-cleaving mechanism. These results are consistent with the operation of the rTCA cycle in MC-1. Strain MC-1 appears to be the first known representative of the alpha-Proteobacteria to use the rTCA cycle for autotrophy. | lld:pubmed |
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| pubmed-article:16461683 | pubmed:language | eng | lld:pubmed |
| pubmed-article:16461683 | pubmed:journal | http://linkedlifedata.com/r... | lld:pubmed |
| pubmed-article:16461683 | pubmed:citationSubset | IM | lld:pubmed |
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| pubmed-article:16461683 | pubmed:status | MEDLINE | lld:pubmed |
| pubmed-article:16461683 | pubmed:month | Feb | lld:pubmed |
| pubmed-article:16461683 | pubmed:issn | 0099-2240 | lld:pubmed |
| pubmed-article:16461683 | pubmed:author | pubmed-author:WilliamsTimot... | lld:pubmed |
| pubmed-article:16461683 | pubmed:author | pubmed-author:ZhangChuanlun... | lld:pubmed |
| pubmed-article:16461683 | pubmed:author | pubmed-author:ScottJames... | lld:pubmed |
| pubmed-article:16461683 | pubmed:author | pubmed-author:BazylinskiDen... | lld:pubmed |
| pubmed-article:16461683 | pubmed:issnType | Print | lld:pubmed |
| pubmed-article:16461683 | pubmed:volume | 72 | lld:pubmed |
| pubmed-article:16461683 | pubmed:owner | NLM | lld:pubmed |
| pubmed-article:16461683 | pubmed:authorsComplete | Y | lld:pubmed |
| pubmed-article:16461683 | pubmed:pagination | 1322-9 | lld:pubmed |
| pubmed-article:16461683 | pubmed:dateRevised | 2011-11-17 | lld:pubmed |
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| pubmed-article:16461683 | pubmed:meshHeading | pubmed-meshheading:16461683... | lld:pubmed |
| pubmed-article:16461683 | pubmed:year | 2006 | lld:pubmed |
| pubmed-article:16461683 | pubmed:articleTitle | Evidence for autotrophy via the reverse tricarboxylic acid cycle in the marine magnetotactic coccus strain MC-1. | lld:pubmed |
| pubmed-article:16461683 | pubmed:affiliation | Department of Biochemistry, Biophysics, and Molecular Biology, Iowa State University, Ames, Iowa 50011, USA. | lld:pubmed |
| pubmed-article:16461683 | pubmed:publicationType | Journal Article | lld:pubmed |
| pubmed-article:16461683 | pubmed:publicationType | Research Support, U.S. Gov't, Non-P.H.S. | lld:pubmed |
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