Utilization of Glycerol as a Hydrogen Acceptor by Lactobacillus reuteri : Purification of 1,3-Propanediol:NAD + Oxidoreductase

Author:

Talarico Todd L.1,Axelsson Lars T.1,Novotny James1,Fiuzat Mitra1,Dobrogosz Walter J.1

Affiliation:

1. Department of Microbiology, North Carolina State University, Raleigh, North Carolina 27695, and Department of Microbiology, Swedish University of Agricultural Sciences, S-75007 Uppsala, Sweden2

Abstract

Lactobacillus reuteri utilizes exogenously added glycerol as a hydrogen acceptor during carbohydrate fermentations, resulting in higher growth rates and cell yields than those obtained during growth on carbohydrates alone. Glycerol is first converted to 3-hydroxypropionaldehyde by a coenzyme B 12 -dependent glycerol dehydratase and then reduced to 1,3-propanediol by an NAD + -dependent oxidoreductase. The latter enzyme was purified and determined to have a molecular weight of 180,000; it is predicted to exist as a tetramer of identical 42,000-molecular-weight subunits.

Publisher

American Society for Microbiology

Subject

Ecology,Applied Microbiology and Biotechnology,Food Science,Biotechnology

Reference29 articles.

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