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Direct conversion of carbon dioxide into chemicals using engineered autotrophic microorganisms offers a potential solution for both sustainability and carbon mitigation. Butyrate is an important chemical used in various industries, including fragrance, food, and plastics. A model cyanobacterium Synechococcus elongatus PCC 7942 was engineered for the direct photosynthetic conversion of CO to butyrate. An engineered Clostridium Coenzyme A (CoA) dependent pathway leading to the synthesis of butyryl-CoA, the precursor to butyrate, was introduced into S. elongatus PCC 7942. Two CoA removal strategies were then individually coupled to the modified CoA dependent pathway to yield butyrate production. Similar results were observed between the two CoA removal strategies. The best butyrate producing strain of S. elongatus resulted in an observed butyrate titer of 750 mg/L and a cumulative titer of 1.1 g/L. These results demonstrated the feasibility of photosynthetic butyrate production, and expanded the chemical repertoire accessible for production by photoautotrophs. This article is protected by copyright. All rights reserved.
This article was published in the following journal.
Name: Biotechnology and bioengineering
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A phylum of oxygenic photosynthetic bacteria comprised of unicellular to multicellular bacteria possessing CHLOROPHYLL a and carrying out oxygenic PHOTOSYNTHESIS. Cyanobacteria are the only known organisms capable of fixing both CARBON DIOXIDE (in the presence of light) and NITROGEN. Cell morphology can include nitrogen-fixing heterocysts and/or resting cells called akinetes. Formerly called blue-green algae, cyanobacteria were traditionally treated as ALGAE.
A sulfur-containing analog of butyrylcholine which is hydrolyzed by butyrylcholinesterase to butyrate and thiocholine. It is used as a reagent in the determination of butyrylcholinesterase activity.
A ZINC FINGER MOTIF containing immediate early protein that is closely related to TRISTETRAPROLIN. It interacts with and helps destabilize VASCULAR ENDOTHELIAL GROWTH FACTOR mRNA.
Chemically-engineered oligonucleotides used to selectively inhibit expression of target genes through sequence-specific binding of corresponding microRNA (miRNA) sites.
The synthesis by organisms of organic chemical compounds, especially carbohydrates, from carbon dioxide using energy obtained from light rather than from the oxidation of chemical compounds. Photosynthesis comprises two separate processes: the light reactions and the dark reactions. In higher plants; GREEN ALGAE; and CYANOBACTERIA; NADPH and ATP formed by the light reactions drive the dark reactions which result in the fixation of carbon dioxide. (from Oxford Dictionary of Biochemistry and Molecular Biology, 2001)
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