Metabolic engineering of microbes for branched-chain biodiesel production with low-temperature property
| Autor: | Tiangang Liu, Yuchen Zhang, Hui Tao, Daoyi Guo, Zixin Deng |
|---|---|
| Rok vydání: | 2015 |
| Předmět: |
WS/DGAT
Management Monitoring Policy and Law Applied Microbiology and Biotechnology Pichia pastoris Metabolic engineering chemistry.chemical_compound Branched-chain amino acid biosynthesis chemistry.chemical_classification Biodiesel Branched-chain esters biology Renewable Energy Sustainability and the Environment E. coli Fatty acid Fatty acid ester biology.organism_classification Yeast Amino acid General Energy chemistry Biochemistry Biodiesel production Research Article Biotechnology |
| Zdroj: | Biotechnology for Biofuels |
| ISSN: | 1754-6834 |
| DOI: | 10.1186/s13068-015-0270-7 |
| Popis: | Background The steadily increasing demand for diesel fuels calls for renewable energy sources. This has attracted a growing amount of research to develop advanced, alternative biodiesel worldwide. Several major disadvantages of current biodiesels are the undesirable physical properties such as high viscosity and poor low-temperature operability. Therefore, there is an urgent need to develop novel and advanced biodiesels. Results Inspired by the proven capability of wax ester synthase/acyl-coenzyme A, diacylglycerol acyltransferase (WS/DGAT) to generate fatty acid esters, de novo biosynthesis of fatty acid branched-chain esters (FABCEs) and branched fatty acid branched-chain esters (BFABCEs) was performed in engineered Escherichia coli through combination of the (branched) fatty acid biosynthetic pathway and the branched-chain amino acid biosynthetic pathway. Furthermore, by modifying the fatty acid pathway, we improved FABCE production to 273 mg/L and achieved a high proportion of FABCEs at 99.3 % of total fatty acid esters. In order to investigate the universality of this strategy, Pichia pastoris yeast was engineered and produced desirable levels of FABCEs for the first time with a good starting point of 169 mg/L. Conclusions We propose new pathways of fatty acid ester biosynthesis and establish proof of concept through metabolic engineering of E. coli and P. pastoris yeast. We were able to produce advanced biodiesels with high proportions FABCEs and BFABCEs. Furthermore, this new strategy promises to achieve advanced biodiesels with beneficial low-temperature properties. Electronic supplementary material The online version of this article (doi:10.1186/s13068-015-0270-7) contains supplementary material, which is available to authorized users. |
| Databáze: | OpenAIRE |
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