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2015 ; 5
(ä): 13670
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Mimicking a natural pathway for de novo biosynthesis: natural vanillin production
from accessible carbon sources
#MMPMID26329726
Ni J
; Tao F
; Du H
; Xu P
Sci Rep
2015[Sep]; 5
(ä): 13670
PMID26329726
show ga
Plant secondary metabolites have been attracting people's attention for
centuries, due to their potentials; however, their production is still difficult
and costly. The rich diversity of microbes and microbial genome sequence data
provide unprecedented gene resources that enable to develop efficient artificial
pathways in microorganisms. Here, by mimicking a natural pathway of plants using
microbial genes, a new metabolic route was developed in E. coli for the synthesis
of vanillin, the most widely used flavoring agent. A series of factors were
systematically investigated for raising production, including efficiency and
suitability of genes, gene dosage, and culture media. The metabolically
engineered strain produced 97.2?mg/L vanillin from l-tyrosine, 19.3?mg/L from
glucose, 13.3?mg/L from xylose and 24.7?mg/L from glycerol. These results show
that the metabolic route enables production of natural vanillin from low-cost
substrates, suggesting that it is a good strategy to mimick natural pathways for
artificial pathway design.