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Dual pathway for metabolic engineering of Escherichia coli to produce the highly valuable hydroxytyrosol
One of the most abundant phenolic compounds traced in olive tissues is hydroxytyrosol (HT), a molecule that has been attributed with a pile of beneficial effects, well documented by many epidemiological studies and thus adding value to products containing it. Strong antioxidant capacity and protecti...
Autores principales: | , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Public Library of Science
2019
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6828502/ https://www.ncbi.nlm.nih.gov/pubmed/31682615 http://dx.doi.org/10.1371/journal.pone.0212243 |
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author | Trantas, Emmanouil Navakoudis, Eleni Pavlidis, Theofilos Nikou, Theodora Halabalaki, Maria Skaltsounis, Leandros Ververidis, Filippos |
author_facet | Trantas, Emmanouil Navakoudis, Eleni Pavlidis, Theofilos Nikou, Theodora Halabalaki, Maria Skaltsounis, Leandros Ververidis, Filippos |
author_sort | Trantas, Emmanouil |
collection | PubMed |
description | One of the most abundant phenolic compounds traced in olive tissues is hydroxytyrosol (HT), a molecule that has been attributed with a pile of beneficial effects, well documented by many epidemiological studies and thus adding value to products containing it. Strong antioxidant capacity and protection from cancer are only some of its exceptional features making it ideal as a potential supplement or preservative to be employed in the nutraceutical, agrochemical, cosmeceutical, and food industry. The HT biosynthetic pathway in plants (e.g. olive fruit tissues) is not well apprehended yet. In this contribution we employed a metabolic engineering strategy by constructing a dual pathway introduced in Escherichia coli and proofing its significant functionality leading it to produce HT. Our primary target was to investigate whether such a metabolic engineering approach could benefit the metabolic flow of tyrosine introduced to the conceived dual pathway, leading to the maximalization of the HT productivity. Various gene combinations derived from plants or bacteria were used to form a newly inspired, artificial biosynthetic dual pathway managing to redirect the carbon flow towards the production of HT directly from glucose. Various biosynthetic bottlenecks faced due to feaB gene function, resolved through the overexpression of a functional aldehyde reductase. Currently, we have achieved equimolar concentration of HT to tyrosine as precursor when overproduced straight from glucose, reaching the level of 1.76 mM (270.8 mg/L) analyzed by LC-HRMS. This work realizes the existing bottlenecks of the metabolic engineering process that was dependent on the utilized host strain, growth medium as well as to other factors studied in this work. |
format | Online Article Text |
id | pubmed-6828502 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2019 |
publisher | Public Library of Science |
record_format | MEDLINE/PubMed |
spelling | pubmed-68285022019-11-12 Dual pathway for metabolic engineering of Escherichia coli to produce the highly valuable hydroxytyrosol Trantas, Emmanouil Navakoudis, Eleni Pavlidis, Theofilos Nikou, Theodora Halabalaki, Maria Skaltsounis, Leandros Ververidis, Filippos PLoS One Research Article One of the most abundant phenolic compounds traced in olive tissues is hydroxytyrosol (HT), a molecule that has been attributed with a pile of beneficial effects, well documented by many epidemiological studies and thus adding value to products containing it. Strong antioxidant capacity and protection from cancer are only some of its exceptional features making it ideal as a potential supplement or preservative to be employed in the nutraceutical, agrochemical, cosmeceutical, and food industry. The HT biosynthetic pathway in plants (e.g. olive fruit tissues) is not well apprehended yet. In this contribution we employed a metabolic engineering strategy by constructing a dual pathway introduced in Escherichia coli and proofing its significant functionality leading it to produce HT. Our primary target was to investigate whether such a metabolic engineering approach could benefit the metabolic flow of tyrosine introduced to the conceived dual pathway, leading to the maximalization of the HT productivity. Various gene combinations derived from plants or bacteria were used to form a newly inspired, artificial biosynthetic dual pathway managing to redirect the carbon flow towards the production of HT directly from glucose. Various biosynthetic bottlenecks faced due to feaB gene function, resolved through the overexpression of a functional aldehyde reductase. Currently, we have achieved equimolar concentration of HT to tyrosine as precursor when overproduced straight from glucose, reaching the level of 1.76 mM (270.8 mg/L) analyzed by LC-HRMS. This work realizes the existing bottlenecks of the metabolic engineering process that was dependent on the utilized host strain, growth medium as well as to other factors studied in this work. Public Library of Science 2019-11-04 /pmc/articles/PMC6828502/ /pubmed/31682615 http://dx.doi.org/10.1371/journal.pone.0212243 Text en © 2019 Trantas et al http://creativecommons.org/licenses/by/4.0/ This is an open access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. |
spellingShingle | Research Article Trantas, Emmanouil Navakoudis, Eleni Pavlidis, Theofilos Nikou, Theodora Halabalaki, Maria Skaltsounis, Leandros Ververidis, Filippos Dual pathway for metabolic engineering of Escherichia coli to produce the highly valuable hydroxytyrosol |
title | Dual pathway for metabolic engineering of Escherichia coli to produce the highly valuable hydroxytyrosol |
title_full | Dual pathway for metabolic engineering of Escherichia coli to produce the highly valuable hydroxytyrosol |
title_fullStr | Dual pathway for metabolic engineering of Escherichia coli to produce the highly valuable hydroxytyrosol |
title_full_unstemmed | Dual pathway for metabolic engineering of Escherichia coli to produce the highly valuable hydroxytyrosol |
title_short | Dual pathway for metabolic engineering of Escherichia coli to produce the highly valuable hydroxytyrosol |
title_sort | dual pathway for metabolic engineering of escherichia coli to produce the highly valuable hydroxytyrosol |
topic | Research Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6828502/ https://www.ncbi.nlm.nih.gov/pubmed/31682615 http://dx.doi.org/10.1371/journal.pone.0212243 |
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