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Journal of Bacteriology, September 1999, p. 5521-5526, Vol. 181, No. 17
Microbial Ingredients Section, NIZO Food
Research and Wageningen Centre for Food Science, 6710 BA Ede, The
Netherlands1; Laboratoire de
Génétique Moléculaire, Université catholique de
Louvain, B-1348 Louvain-La-Neuve, Belgium2; and
Instituto de Biologia Experimental e Tecnológica,
Instituto de Tecnologia Química e Biológica, Universidade
Nova de Lisboa, 2780 Oeiras, Portugal3
Received 8 March 1999/Accepted 27 June 1999
Acetate was shown to improve glucose fermentation in
Lactococcus lactis deficient in lactate dehydrogenase.
13C and 1H nuclear magnetic resonance studies
using [2-13C]glucose and [2-13C]acetate as
substrates demonstrated that acetate was exclusively converted to
ethanol. This novel pathway provides an alternative route for
NAD+ regeneration in the absence of lactate dehydrogenase.
0021-9193/99/$04.00+0
Copyright © 1999, American Society for Microbiology. All rights reserved.
Acetate Utilization in Lactococcus
lactis Deficient in Lactate Dehydrogenase: a Rescue Pathway for
Maintaining Redox Balance
*
Corresponding author. Mailing address: Laboratoire de
Génétique Moléculaire, Université catholique de
Louvain, 5 Place Croix du Sud, B-1348 Louvain-La-Neuve, Belgium. Phone:
32-10-478896. Fax: 32-10-473109. E-mail:
hols{at}gene.ucl.ac.be.
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