Correlation Engine 2.0
Clear Search sequence regions

Sizes of these terms reflect their relevance to your search.

Polyoxin, a peptidyl nucleoside antibiotic, consists of three building blocks including a nucleoside skeleton, polyoximic acid (POIA), and carbamoylpolyoxamic acid (CPOAA), however, little is known about the "pathway redundancy" of the metabolic networks directing the CPOAA biosynthesis in the cell factories of the polyoxin producer. Here we report the genetic characterization of CPOAA biosynthesis with revealing a "pathway redundancy" in metabolic networks. Independent mutation of the four genes (polL-N and polP) directly resulted in the accumulation of polyoxin I, suggesting their positive roles for CPOAA biosynthesis. Moreover, the individual mutant of polN and polP also partially retains polyoxin production, suggesting the existence of the alternative homologs substituting their functional roles. It is unveiled that argA and argB in L-arginine biosynthetic pathway contributed to the "pathway redundancy", more interestingly, argB in S. cacaoi is indispensible for both polyoxin production and L-arginine biosynthesis. These data should provide an example for the research on the "pathway redundancy" in metabolic networks, and lay a solid foundation for targeted enhancement of polyoxin production with synthetic biology strategies.


Wenqing Chen, Daofeng Dai, Changchun Wang, Tingting Huang, Lipeng Zhai, Zixin Deng. Genetic dissection of the polyoxin building block-carbamoylpolyoxamic acid biosynthesis revealing the "pathway redundancy" in metabolic networks. Microbial cell factories. 2013;12:121

Expand section icon Mesh Tags

Expand section icon Substances

PMID: 24314013

View Full Text