Abstract:
:Increasing the microbial CO2-fixing efficiency often requires supplying sufficient ATP and redirecting carbon flux for the production of metabolites. However, addressing these two issues concurrently remains a challenge. Here, we present a combinational strategy based on a synergetic CO2-fixing pathway that combines an ATP-generating carboxylation reaction in the central metabolic pathway with the ATP-consuming RuBisCO shunt in the carbon fixation pathway. This strategy provides enough ATP to improve the efficiency of CO2 fixation and simultaneously rewires the CO2-fixing pathway to the central metabolic pathway for the biosynthesis of chemicals. We demonstrate the application of this strategy by increasing the CO2-fixing rate and malate production in the autotroph Synechococcus elongatus by 110% and to 260 μM respectively, as well as increasing these two factors in the heterotrophic CO2-fixing Escherichia coli by 870% and to 387 mM respectively.
journal_name
Metab Engjournal_title
Metabolic engineeringauthors
Hu G,Zhou J,Chen X,Qian Y,Gao C,Guo L,Xu P,Chen W,Chen J,Li Y,Liu Ldoi
10.1016/j.ymben.2018.05.007subject
Has Abstractpub_date
2018-05-01 00:00:00pages
496-504eissn
1096-7176issn
1096-7184pii
S1096-7176(18)30090-9journal_volume
47pub_type
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