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Acetogenic mixotrophy: novel options for yield improvement in biofuels and biochemicals production

Paper ID Volume ID Publish Year Pages File Format Full-Text
15606 42454 2015 13 PDF Available
Title
Acetogenic mixotrophy: novel options for yield improvement in biofuels and biochemicals production
Abstract

•ANP mixotrophic fermentation is a pathway to eliminate carbon loss from glycolysis.•With additional H2, the ANP pathway can produce n-butanol at 98% carbon efficiency.•Basic viability of ANP fermentation has been demonstrated in a number of acetogens.

Mass yields of biofuels and chemicals from sugar fermentations are limited by the decarboxylation reactions involved in Embden–Meyerhof–Parnas (EMP) glycolysis. This paper reviews one route to recapture evolved CO2 using the Wood–Ljungdahl carbon fixation pathway (WLP) in a process called anaerobic, non-photosynthetic (ANP) mixotrophic fermentation. In ANP mixotrophic fermentation, the two molecules of CO2 and eight electrons produced from glycolysis are used by the WLP to generate three molecules of acetyl-CoA from glucose, rather than the two molecules that are produced by typical fermentation processes. In this review, we define the bounds of ANP mixotrophy, calculate the potential metabolic advantages, and discuss the viability in a number of host organisms. Additionally, we highlight recent accomplishments in the field, including the recent discovery of electron bifurcation in acetogens, and close with recommendations to realize mixotrophic biofuel and biochemical production.

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Acetogenic mixotrophy: novel options for yield improvement in biofuels and biochemicals production
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Publisher
Database: Elsevier - ScienceDirect
Journal: Current Opinion in Biotechnology - Volume 33, June 2015, Pages 60–72
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
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Full-text PDF Download
Online Support
Any Questions? feel free to contact us