Assessment of the stoichiometry and efficiency of CO2 fixation coupled to reduced sulfur oxidation
Chemolithoautotrophic sulfur oxidizing bacteria (SOB) couple the oxidation of reduced sulfur compounds to the production of biomass. Their role in the cycling of carbon, sulfur, oxygen and nitrogen is, however, difficult to quantify due to the complexity of sulfur oxidation pathways. We describe a g...
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| Format: | Article |
| Language: | English |
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Frontiers Media S.A.
2015-05-01
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| Series: | Frontiers in Microbiology |
| Subjects: | |
| Online Access: | http://journal.frontiersin.org/Journal/10.3389/fmicb.2015.00484/full |
| _version_ | 1818452615164329984 |
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| author | Judith M Klatt Lubos ePolerecky Lubos ePolerecky |
| author_facet | Judith M Klatt Lubos ePolerecky Lubos ePolerecky |
| author_sort | Judith M Klatt |
| collection | DOAJ |
| description | Chemolithoautotrophic sulfur oxidizing bacteria (SOB) couple the oxidation of reduced sulfur compounds to the production of biomass. Their role in the cycling of carbon, sulfur, oxygen and nitrogen is, however, difficult to quantify due to the complexity of sulfur oxidation pathways. We describe a generic theoretical framework for linking the stoichiometry and energy conservation efficiency of autotrophic sulfur oxidation while accounting for the partitioning of the reduced sulfur pool between the energy generating and energy conserving steps as well as between the main possible products (sulfate versus elemental sulfur). Using this framework, we show that the energy conservation efficiency varies widely among SOB with no apparent relationship to their phylogeny. Aerobic SOB equipped with reverse dissimilatory sulfite reductase tend to have higher efficiency than those relying on the complete Sox pathway, whereas for anaerobic SOB the presence of membrane-bound, as opposed to periplasmic, nitrate reductase systems appears to be linked to higher efficiency. We employ the framework to also show how limited rate measurements can be used to estimate the primary productivity of SOB without the knowledge of the sulfate-to-elemental-sulfur production ratio. Finally, we discuss how the framework can help researchers gain new insights into the activity of SOB and their niches. |
| first_indexed | 2024-12-14T21:25:54Z |
| format | Article |
| id | doaj.art-37e05b6dd2fc4fe28ffecb312a065772 |
| institution | Directory Open Access Journal |
| issn | 1664-302X |
| language | English |
| last_indexed | 2024-12-14T21:25:54Z |
| publishDate | 2015-05-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Microbiology |
| spelling | doaj.art-37e05b6dd2fc4fe28ffecb312a0657722022-12-21T22:46:48ZengFrontiers Media S.A.Frontiers in Microbiology1664-302X2015-05-01610.3389/fmicb.2015.00484133345Assessment of the stoichiometry and efficiency of CO2 fixation coupled to reduced sulfur oxidationJudith M Klatt0Lubos ePolerecky1Lubos ePolerecky2Max-Planck-Institute for Marine MicrobiologyMax-Planck-Institute for Marine MicrobiologyUtrecht UniversityChemolithoautotrophic sulfur oxidizing bacteria (SOB) couple the oxidation of reduced sulfur compounds to the production of biomass. Their role in the cycling of carbon, sulfur, oxygen and nitrogen is, however, difficult to quantify due to the complexity of sulfur oxidation pathways. We describe a generic theoretical framework for linking the stoichiometry and energy conservation efficiency of autotrophic sulfur oxidation while accounting for the partitioning of the reduced sulfur pool between the energy generating and energy conserving steps as well as between the main possible products (sulfate versus elemental sulfur). Using this framework, we show that the energy conservation efficiency varies widely among SOB with no apparent relationship to their phylogeny. Aerobic SOB equipped with reverse dissimilatory sulfite reductase tend to have higher efficiency than those relying on the complete Sox pathway, whereas for anaerobic SOB the presence of membrane-bound, as opposed to periplasmic, nitrate reductase systems appears to be linked to higher efficiency. We employ the framework to also show how limited rate measurements can be used to estimate the primary productivity of SOB without the knowledge of the sulfate-to-elemental-sulfur production ratio. Finally, we discuss how the framework can help researchers gain new insights into the activity of SOB and their niches.http://journal.frontiersin.org/Journal/10.3389/fmicb.2015.00484/fullchemolithoautotrophystoichiometrysulfur cycleSulfur oxidation pathwaysenergy conservation efficiencycarbon cycle. |
| spellingShingle | Judith M Klatt Lubos ePolerecky Lubos ePolerecky Assessment of the stoichiometry and efficiency of CO2 fixation coupled to reduced sulfur oxidation Frontiers in Microbiology chemolithoautotrophy stoichiometry sulfur cycle Sulfur oxidation pathways energy conservation efficiency carbon cycle. |
| title | Assessment of the stoichiometry and efficiency of CO2 fixation coupled to reduced sulfur oxidation |
| title_full | Assessment of the stoichiometry and efficiency of CO2 fixation coupled to reduced sulfur oxidation |
| title_fullStr | Assessment of the stoichiometry and efficiency of CO2 fixation coupled to reduced sulfur oxidation |
| title_full_unstemmed | Assessment of the stoichiometry and efficiency of CO2 fixation coupled to reduced sulfur oxidation |
| title_short | Assessment of the stoichiometry and efficiency of CO2 fixation coupled to reduced sulfur oxidation |
| title_sort | assessment of the stoichiometry and efficiency of co2 fixation coupled to reduced sulfur oxidation |
| topic | chemolithoautotrophy stoichiometry sulfur cycle Sulfur oxidation pathways energy conservation efficiency carbon cycle. |
| url | http://journal.frontiersin.org/Journal/10.3389/fmicb.2015.00484/full |
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