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Appl. Environ. Microbiol., Jul 1996, 2657-2659, Vol 62, No. 7
G Ravot, B Ollivier, ML Fardeau, BK Patel, KT Andrews, M Magot and JL Garcia
New members of the order Thermotogales were isolated from nonvolcanically
heated geothermal environments, including oil fields and waters of the
Great Artesian Basin of Australia, thereby extending their known habitats,
previously recognized primarily as volcanic. The hyperthermophilic and
thermophilic members of Thermotogales of volcanic origin, together with the
recently described nonvolcanic species of this order and three new isolates
described in this paper, were all found to produce L-alanine from glucose
fermentation, in addition to acetate, lactate, CO2 and H2. L-alanine
production from glucose is a trait in common with Pyrococcus furiosus and
Thermococcus profundus. We propose that L-alanine production from sugar
fermentation be regarded as an ancestral metabolic characteristic.
Copyright © 1996, American Society for Microbiology
L-alanine production from glucose fermentation by hyperthermophilic members of the domains bacteria and Archaea: a remnant of an ancestral metabolism?
Laboratoire ORSTOM de Microbiologie des Anaerobies, Universite de Provence, Marseille, France.
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