Open AccessAmino acid fermentation and hydrogen transfer in mixed cultures
Author(s) -
Nanninga Henk J.,
Gottschal Jan C.
Publication year - 1985
Publication title -
fems microbiology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.899
H-Index - 151
eISSN - 1574-6968
pISSN - 0378-1097
DOI - 10.1111/j.1574-6968.1985.tb01158.x
Subject(s) - valine , leucine , amino acid , alanine , biochemistry , chemistry , fermentation , serine , butyrate , bacteria , biology , enzyme , genetics
The degradation of the following amino acids was investigated in mixed cultures obtained from a waste water purification plant: aspartate, glutamate, serine, alanine, valine and leucine. Inhibition of sulfate‐reducing bacteria in these mixed cultures by molybdate was found to inhibit amino acid degradation. The degradation of serine, alanine, valine and leucine was accelerated considerably by active sulfate reduction. The fermentation of aspartate and glutamate was not stimulated by the presence of sulfate‐reducing bacteria. The existence of species which are able to ferment valine and leucine by coupling their oxidation to the reduction of exogenous acetate to butyrate was demonstrated.