Genetic Engineering Reconstruction of Klebsiella pneumoniae Producing 1,3-propanediol by the Gene yqhD Encoding 1,3-propanediol Oxidoreductase Isoenzyme / 中国生物工程杂志
China Biotechnology
;
(12)2006.
Artigo
em Chinês
| WPRIM
| ID: wpr-686101
ABSTRACT
In the reductive branch, glycerol is first dehydrated to 3-hydroxypropionaldehyde that is then reduced to 1,3-PD under the consumption of reducing power (NADH). If over-expression of the gene dhaB encoding glycerol dehydrase is achieved,the reducing power will be scarce and 3-hydroxypropionaldehyde will be accumulated,which is disadvantage to produce 1,3-propanediol.The structure gene yqhD from E.coli encoding 1,3-propanediol oxidoreductase isoenzyme[under the consumption of reducing power (NADPH)]and the gene dhaB encoding glycerol dehydrase from Klebsiella pneumoniae was amplified using PCR method.The two gene were transferred into expression vector pEtac to construct a novel recombinant Klebsiella pneumoniae (pEtac-dhaB-tac-yqhD).Over-expression of yqhD and dhaB in Klebsiella pneumoniae was achieved with pEtac-dhaB-tac-yqhD.The fermentation result on aerobic conversion showed the increase of 20% of 1,3-propanediol yield by Klebsiella pneumoniae(pEtac-dhaB-tac-yqhD) was obtained compared with Klebsiella pneumoniae.The main by-products,acetic acid and butanediol decreased estrogen receptors 30% obviously.
Texto completo:
DisponíveL
Índice:
WPRIM (Pacífico Ocidental)
Idioma:
Chinês
Revista:
China Biotechnology
Ano de publicação:
2006
Tipo de documento:
Artigo
Similares
MEDLINE
...
LILACS
LIS