Effects of butyric and acetic acids on acetone-butanol formation by Clostridium acetobutylicum. Export

@article{citeulike:4893322, abstract = {The actions of butyric and acetic acids on acetone-butanol fermentation are investigated. Production of butyric and acetic acids are controlled by the extracellular concentrations of both acids: acetic acid added to the medium inhibits its own formation but has no effect on butyric acid formation, and added butyric acid inhibits its own formation but not that of acetic acid. The ratio of end metabolites depends upon acetic and butyric acid quantities excreted during the fermentation. In contrast to acetic acid, which specifically increases acetone formation, butyric acid increases both acetone and butanol formations. Acetate and butyrate kinase activities were also examined. Both increase at the start of fermentation and decrease when solvents appear in the medium. Coenzyme A transferase activity is weak in the acidogenic phase and markedly increases in the solvent phase. Acetic and butyric acids appear to be co-substrates. On the basis of these results, a mechanism of acetic and butyric acid pathways, coupled to solvent formation by C. acetobutylicum glucose fermentation is proposed.}, author = {Matta-el-Ammouri, G. and Janati-Idrissi, R. and Junelles, A. M. and Petitdemange, H. and Gay, R.}, citeulike-article-id = {4893322}, citeulike-linkout-0 = {http://view.ncbi.nlm.nih.gov/pubmed/3032286}, citeulike-linkout-1 = {http://www.hubmed.org/display.cgi?uids=3032286}, issn = {0300-9084}, journal = {Biochimie}, keywords = {acetate, acetobutylicum, acetone-butanol, acids, butyrate, clostridium, formation, solventogenesis}, month = {February}, number = {2}, pages = {109--115}, posted-at = {2009-06-18 15:28:40}, priority = {2}, title = {Effects of butyric and acetic acids on acetone-butanol formation by Clostridium acetobutylicum.}, url = {http://view.ncbi.nlm.nih.gov/pubmed/3032286}, volume = {69}, year = {1987} }

TY - JOUR ID - citeulike:4893322 L3 - citeulike-article-id:4893322 N2 - The actions of butyric and acetic acids on acetone-butanol fermentation are investigated. Production of butyric and acetic acids are controlled by the extracellular concentrations of both acids: acetic acid added to the medium inhibits its own formation but has no effect on butyric acid formation, and added butyric acid inhibits its own formation but not that of acetic acid. The ratio of end metabolites depends upon acetic and butyric acid quantities excreted during the fermentation. In contrast to acetic acid, which specifically increases acetone formation, butyric acid increases both acetone and butanol formations. Acetate and butyrate kinase activities were also examined. Both increase at the start of fermentation and decrease when solvents appear in the medium. Coenzyme A transferase activity is weak in the acidogenic phase and markedly increases in the solvent phase. Acetic and butyric acids appear to be co-substrates. On the basis of these results, a mechanism of acetic and butyric acid pathways, coupled to solvent formation by C. acetobutylicum glucose fermentation is proposed. IS - 2 JF - Biochimie SN - 0300-9084 EP - 115 TI - Effects of butyric and acetic acids on acetone-butanol formation by Clostridium acetobutylicum. VL - 69 SP - 109 KW - acetate KW - acetobutylicum KW - acetone-butanol KW - acids KW - butyrate KW - clostridium KW - formation KW - solventogenesis AU - Matta-el-Ammouri, G AU - Janati-Idrissi, R AU - Junelles, AM AU - Petitdemange, H AU - Gay, R PY - 1987/02// UR - http://view.ncbi.nlm.nih.gov/pubmed/3032286 ER -