Substrate and product inhibition of hydrogen production by the extreme thermophile, Caldicellulosiruptor saccharolyticus.
(2003) In Biotechnology and Bioengineering 81(3). p.255-262- Abstract
- Substrate and product inhibition of hydrogen production during sucrose fermentation by the extremely thermophilic bacterium Caldicellulosiruptor saccharolyticus was studied. The inhibition kinetics were analyzed with a noncompetitive, nonlinear inhibition model. Hydrogen was the most severe inhibitor when allowed to accumulate in the culture. Concentrations of 5-10 mM H2 in the gas phase ( partial hydrogen pressure (pH2) of (1-2) · 104 Pa) initiated a metabolic shift to lactate formation. The extent of inhibition by hydrogen was dependent on the density of the culture. The highest tolerance for hydrogen was found at low volumetric hydrogen production rates, as occurred in cultures with low cell densities. Under those conditions the... (More)
- Substrate and product inhibition of hydrogen production during sucrose fermentation by the extremely thermophilic bacterium Caldicellulosiruptor saccharolyticus was studied. The inhibition kinetics were analyzed with a noncompetitive, nonlinear inhibition model. Hydrogen was the most severe inhibitor when allowed to accumulate in the culture. Concentrations of 5-10 mM H2 in the gas phase ( partial hydrogen pressure (pH2) of (1-2) · 104 Pa) initiated a metabolic shift to lactate formation. The extent of inhibition by hydrogen was dependent on the density of the culture. The highest tolerance for hydrogen was found at low volumetric hydrogen production rates, as occurred in cultures with low cell densities. Under those conditions the critical hydrogen concentration in the gas phase was 27.7 mM H2 ( pH2 of 5.6 · 104 Pa); above this value hydrogen production ceased completely. With an efficient removal of hydrogen sucrose fermentation was mainly inhibited by sodium acetate. The critical concentrations of sucrose and acetate, at which growth and hydrogen production was completely inhibited (at neutral pH and 70°C), were 292 and 365 mM, respectively. Inorganic salts, such as sodium chloride, mimicked the effect of sodium acetate, implying that ionic strength was responsible for inhibition. Undissociated acetate did not contribute to inhibition of cultures at neutral or slightly acidic pH. Exposure of exponentially growing cultures to concentrations of sodium acetate or sodium chloride higher than ca. 175 mM caused cell lysis, probably due to activation of autolysins. © 2003 Wiley Periodicals, Inc. Biotechnol Bioeng 81: 255-262, 2003. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/132847
- author
- van Niel, Ed LU ; Claassen, P A M and Stams, A J M
- organization
- publishing date
- 2003
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Biotechnology and Bioengineering
- volume
- 81
- issue
- 3
- pages
- 255 - 262
- publisher
- John Wiley & Sons Inc.
- external identifiers
-
- scopus:12244253037
- pmid:12474247
- ISSN
- 1097-0290
- DOI
- 10.1002/bit.10463
- language
- English
- LU publication?
- yes
- id
- 3de024d8-fcb0-48f6-a464-66842de33bc6 (old id 132847)
- date added to LUP
- 2016-04-01 12:21:23
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- 2022-03-28 23:46:14
@article{3de024d8-fcb0-48f6-a464-66842de33bc6,
abstract = {{Substrate and product inhibition of hydrogen production during sucrose fermentation by the extremely thermophilic bacterium Caldicellulosiruptor saccharolyticus was studied. The inhibition kinetics were analyzed with a noncompetitive, nonlinear inhibition model. Hydrogen was the most severe inhibitor when allowed to accumulate in the culture. Concentrations of 5-10 mM H2 in the gas phase ( partial hydrogen pressure (pH2) of (1-2) · 104 Pa) initiated a metabolic shift to lactate formation. The extent of inhibition by hydrogen was dependent on the density of the culture. The highest tolerance for hydrogen was found at low volumetric hydrogen production rates, as occurred in cultures with low cell densities. Under those conditions the critical hydrogen concentration in the gas phase was 27.7 mM H2 ( pH2 of 5.6 · 104 Pa); above this value hydrogen production ceased completely. With an efficient removal of hydrogen sucrose fermentation was mainly inhibited by sodium acetate. The critical concentrations of sucrose and acetate, at which growth and hydrogen production was completely inhibited (at neutral pH and 70°C), were 292 and 365 mM, respectively. Inorganic salts, such as sodium chloride, mimicked the effect of sodium acetate, implying that ionic strength was responsible for inhibition. Undissociated acetate did not contribute to inhibition of cultures at neutral or slightly acidic pH. Exposure of exponentially growing cultures to concentrations of sodium acetate or sodium chloride higher than ca. 175 mM caused cell lysis, probably due to activation of autolysins. © 2003 Wiley Periodicals, Inc. Biotechnol Bioeng 81: 255-262, 2003.}},
author = {{van Niel, Ed and Claassen, P A M and Stams, A J M}},
issn = {{1097-0290}},
language = {{eng}},
number = {{3}},
pages = {{255--262}},
publisher = {{John Wiley & Sons Inc.}},
series = {{Biotechnology and Bioengineering}},
title = {{Substrate and product inhibition of hydrogen production by the extreme thermophile, Caldicellulosiruptor saccharolyticus.}},
url = {{https://lup.lub.lu.se/search/files/2889920/931433.pdf}},
doi = {{10.1002/bit.10463}},
volume = {{81}},
year = {{2003}},
}