| Abstract: | Addition of 5 mm fumarate to cultures of Klebsiella pneumoniae enhanced the rate of glycerol consumption and the production of 1,3-propanediol (PDO). Compared to the control, the activity
of glycerol dehydrogenase increased by 35, 33 and 46%, the activity of glycerol dehydratase increased by 160, 210 and 115%,
and the activity of 1,3-propanediol oxidoreductase increased by 25, 39 and 85% when, respectively, 5, 15 and 25 mm fumarate were provided. At the same time, the ratio of NAD+ to NADH decreased by 20, 23 and 29%. Using a 5 l bioreactor with 5 mM fumarate addition, the specific rate of glycerol consumption and the productivity of PDO was 30 mmol/l h and 17 mmol/l h,
respectively, both increased by 35% over the control.
Revisions requested 15 July 2005; Revisions received 30 August 2005 |
