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Title 

Identification and characterization of the propanediol utilization protein PduP of Lactobacillus reuteri for 3-hydroxypropionic acid production from glycerol

 

Lactobacillus reuteri 유래 3-hydroxypropionic acid 생산 효소의 특성 규명

Authors 

L H LuoJeong-Woo SeoJin Oh BaekBaek Rock OhSun Yeon HeoWon Kyung HongD H KimChul Ho Kim

Publisher 

Springer Verlag (Germany)

Issue Date 

2011

Citation 

Applied Microbiology and Biotechnology, vol. 89, no. 3, pp. 697-703

Keywords 

3-Hydroxypropionic acidGlycerolKlebsiella pneumoniaeLactobacillus reuteriPropanediol utilization protein PduP

Abstract 

Although the de novo biosynthetic mechanism of 3-hydroxypropionic acid (3-HP) in glycerol-fermenting microorganisms is still unclear, the propanediol utilization protein (PduP) of Lactobacillus species has been suggested to be a key enzyme in this regard. To verify this hypothesis, a pduP gene from Lactobacillus reuteri was cloned and expressed, and the encoded protein was characterized. Recombinant L. reuteri PduP exhibited broad substrate specificity including 3-hydroxypropionaldehyde and utilized both NAD+ and NADP+ as a cofactor. Among various aldehyde substrates tested, the specific activity was highest for propionaldehyde, at pH 7.8 and 37 °C. The K m and V max values for propionaldehyde in the presence of NAD+ were 1.18 mM and 0.35 U mg-1, respectively. When L. reuteri pduP was overexpressed in Klebsiella pneumoniae, 3-HP production remarkably increased as compared to the wild-type strain (from 0.18 g L -1 to 0.72 g L-1) under shake-flask culture conditions, and the highest titer (1.38 g L-1 3-HP) was produced by the recombinant strain under batch fermentation conditions in a bioreactor. This is the first report stating the enzymatic properties of PduP protein and the probable role in biosynthesis of 3-HP in glycerol fermentation.

ISSN 

0175-7598

Link 

http://dx.doi.org/10.1007/s00253-010-2887-6

Appears in Collections

1. Journal Articles > Journal Articles

Registered Date

2019-05-02


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