Metabolism of the thermophilic bacterium Oceanithermus profundus
The metabolism of the novel facultatively anaerobic thermophilic bacterium Oceanithermus profundus was studied during growth on maltose, acetate, pyruvate, and hydrogen. The utilization of carbohydrates was shown to proceed via the glycolytic pathway. Under microaerobic growth conditions, the metabo...
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Published in | Microbiology (New York) Vol. 77; no. 2; pp. 159 - 165 |
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Main Authors | , , , , , |
Format | Journal Article |
Language | English |
Published |
Dordrecht
SP MAIK Nauka/Interperiodica
01.04.2008
|
Subjects | |
Online Access | Get full text |
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Summary: | The metabolism of the novel facultatively anaerobic thermophilic bacterium
Oceanithermus profundus
was studied during growth on maltose, acetate, pyruvate, and hydrogen. The utilization of carbohydrates was shown to proceed via the glycolytic pathway. Under microaerobic growth conditions, the metabolism of
O. profundus
grown on maltose depended on the substrate concentration. At an initial maltose concentration of 1.4 mM,
O. profundus
carried out oxygen respiration, and in the presence of 3.5 mM maltose, facilitated fermentation occurred, with the formation of acetate and ethanol and limited involvement of oxygen. The use of pyruvate and acetate occurred via the TCA cycle. In cells grown on acetate, the activity of glyoxylate pathway enzymes was revealed. Depending on the energy-yielding process providing for growth (oxygen respiration or nitrate reduction), cells contained cytochromes
a
and
c
or
b
, respectively. The results obtained demonstrate the plasticity of the metabolism of
O. profundus
, which thus appears to be well-adjusted to the rapidly changing conditions in deep-sea hydrothermal vents. |
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Bibliography: | ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 |
ISSN: | 0026-2617 1608-3237 |
DOI: | 10.1134/S0026261708020069 |