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Strain DCB-1 conserves energy for growth from reductive dechlorination coupled to formate oxidation
Abstract
Strain DCB-1 is a strict anaerobe capable of the reductive dechlorination of chlorobenzoates. The effect of dechlorination on the yield of pure cultures od DCB-1 was tested. Cultures were incubated with formate or H2 as electron donors and CO2 as a putative carbon source. Relative to control cultures with benzoate, cultures which dechlorinated 3-chlorobenzoate and 3,5-dichlorobenzoate had higher yields measured both as protein and cell density. On the media tested the apparent growth yield was 1.7 to 3.4 g cell protein per mole Cl- removed. Dechlorination also stimulated formate oxidation by growing cultures. Resuspended cells required an electron donor for dechlorination activity, with either formate or elemental iron serving this function. Resuspended cells did not require an electron acceptor for formate consumption, but reductive dechlorination of 3CB to benzoate stoichiometrically stimulated oxidation of formate to CO2. These results indicate that DCB-1 conserves energy for growth by coupling formate, and probably, H2 oxidation to reductive dechlorination.
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“A key feature of reductive dechlorination came to light with the realization that polychlorinated biphenyls (PCBs) and other aromatic and aliphatic compounds can serve as final electron acceptors in respiratory metabolism (Brown et al., 1987; Mohn and Tiedje, 1990; Schumacher and Holliger, 1996; Susarla et al., 1997; Holliger et al., 1998; Smidt et al., 2000; Duhamel and Edwards, 2007).”
From Nothing lasts forever: understanding microbial biodegradation of polyfluorinated compounds and perfluorinated alkyl substances (2022) · cites this paper as Mohn and Tiedje, 1990
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Research works printed but not linked: 12
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- Dolfing J, Tiedje JM (1986) Hydrogen cycling in a three-tiered food web growing on the methanogenic conversion of 3-chlorobenzoate. FEMS Microbiol Ecol 38: 293?298 · DOI
- Dolfing J, Tiedje JM (1987) Growth yield increase linked to reductive dechlorination in a defined 3-chlorobenzoate degrading methanogenic coculture. Arch Microbiol 149: 102?105 · DOI
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- Postgate J (1949) Competitive inhibition of sulphate reduction by selenate. Nature (Lond) 164: 670?671 · DOI
- Quensen III JF, Tiedje JM, Boyd SA (1988) Reductive dechlorination of polychlorinated biphenyls by anaerobic microorganisms from sediments. Science 242: 752?754 · DOI
- Shelton DR, Tiedje JM (1984) Isolation and partial characterization of bacteria in an anaerobic consortium that mineralizes 3-chlorobenzoic acid. Appl Environ Microbiol 48: 840?848 · DOI
- Stevens TO, Tiedje JM (1988) Carbon dioxide fixation and mixotrophic metabolism by strain DCB-1, a dehalogenating anaerobic bacterium. Appl Environ Microbiol 54: 2944?2948 · DOI
- Stevens TO, Linkfield TG, Tiedje JM (1988) Physiological characterization of strain DCB-1, a unique dehalogenating sulfidogenic bacterium. Appl Environ Microbiol 54: 2938?2943 · DOI
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Wackett, L. P. (2022) · Microbial Biotechnology · doi:10.1111/1751-7915.13928 · Cited by 165
Metadata
- Authors
- Mohn, W. W., & Tiedje, J. M.
- Venue
- Archives of Microbiology
- Published
- 1990-02
- Volume
- 153
- Issue
- 3
- Pages
- 267-271
- ISSN
- 0302-8933
- 1432-072X
- Cited by
- 106
- References
- 0
- Language
- en
- Licence
- www.springer.com/tdm (tdm)
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