Biological funneling of phenolics from transgenic plants engineered to express the bacterial 3-dehydroshikimate dehydratase (qsuB) gene
The economic and environmental sustainability of lignocellulosic biomass biorefineries is predicated on generating biofuels and bioproducts from cell-wall polysaccharide and lignin polymers. Historical efforts in plant genetic engineering have focused on the development of strategies that facilitate...
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Frontiers Media S.A.
2022-10-01
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| Series: | Frontiers in Chemical Engineering |
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| Online Access: | https://www.frontiersin.org/articles/10.3389/fceng.2022.1036084/full |
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| author | German E. Umana German E. Umana German E. Umana Jose M. Perez Jose M. Perez Jose M. Perez Faride Unda Faride Unda Chien-Yuan Lin Chien-Yuan Lin Canan Sener Canan Sener Steven D. Karlen Steven D. Karlen Shawn D. Mansfield Shawn D. Mansfield Aymerick Eudes Aymerick Eudes John Ralph John Ralph John Ralph Timothy J. Donohue Timothy J. Donohue Timothy J. Donohue Daniel R. Noguera Daniel R. Noguera Daniel R. Noguera |
| author_facet | German E. Umana German E. Umana German E. Umana Jose M. Perez Jose M. Perez Jose M. Perez Faride Unda Faride Unda Chien-Yuan Lin Chien-Yuan Lin Canan Sener Canan Sener Steven D. Karlen Steven D. Karlen Shawn D. Mansfield Shawn D. Mansfield Aymerick Eudes Aymerick Eudes John Ralph John Ralph John Ralph Timothy J. Donohue Timothy J. Donohue Timothy J. Donohue Daniel R. Noguera Daniel R. Noguera Daniel R. Noguera |
| author_sort | German E. Umana |
| collection | DOAJ |
| description | The economic and environmental sustainability of lignocellulosic biomass biorefineries is predicated on generating biofuels and bioproducts from cell-wall polysaccharide and lignin polymers. Historical efforts in plant genetic engineering have focused on the development of strategies that facilitate biomass deconstruction, with more recently efforts including the synthesis of high-value chemicals in planta. One such genetic modification is the expression of the bacterial quinate and shikimate utilization B (qsuB) gene that increases the accumulation of protocatechuic acid in lignocellulosic biomass. Herein, we evaluated the effectiveness of an alkaline pretreatment process to extract phenolics directly from wild-type and QsuB-transgenic lines of Arabidopsis, poplar, and sorghum, and then upgrade them to the polyester precursor 2-pyrone-4,6-dicarboxylic acid (PDC) with an engineered strain of Novosphingobium aromaticivorans. Protocatechuic acid extracted from all QsuB transgenic lines was found to be mostly in the glycosylated form. Glycosylated protocatechuic acid and other plant-derived phenolics were effectively metabolized by N. aromaticivorans, and PDC production was greatest using extracts from an Arabidopsis QsuB transgenic line (∼5% w/w), followed by QsuB sorghum (∼1.1% w/w), and QsuB poplar (∼0.4% w/w) lines. The comparison of PDC production from wild-type and QsuB transgenic lines of Arabidopsis, poplar, and sorghum demonstrates the utility of a mild alkaline pretreatment to liberate phenolics from plant biomass that are either naturally present or that accumulate as a consequence of genetic engineering strategies. All QsuB transgenic lines outperformed their wild-type counterparts with respect to observed PDC yields. In addition, microbial funneling to PDC was effective even when most of the protocatechuic acid extracted was in glycosylated form, clearly demonstrating that this bacterium can metabolize these aromatic conjugates. These findings illustrate the benefits of combining plant and microbial engineering for bioproduct formation from phenolics in lignocellulosic biorefineries. |
| first_indexed | 2024-04-13T18:54:02Z |
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| institution | Directory Open Access Journal |
| issn | 2673-2718 |
| language | English |
| last_indexed | 2024-04-13T18:54:02Z |
| publishDate | 2022-10-01 |
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| series | Frontiers in Chemical Engineering |
| spelling | doaj.art-d433cd9b8ae748be94934d7c674a63732022-12-22T02:34:19ZengFrontiers Media S.A.Frontiers in Chemical Engineering2673-27182022-10-01410.3389/fceng.2022.10360841036084Biological funneling of phenolics from transgenic plants engineered to express the bacterial 3-dehydroshikimate dehydratase (qsuB) geneGerman E. Umana0German E. Umana1German E. Umana2Jose M. Perez3Jose M. Perez4Jose M. Perez5Faride Unda6Faride Unda7Chien-Yuan Lin8Chien-Yuan Lin9Canan Sener10Canan Sener11Steven D. Karlen12Steven D. Karlen13Shawn D. Mansfield14Shawn D. Mansfield15Aymerick Eudes16Aymerick Eudes17John Ralph18John Ralph19John Ralph20Timothy J. Donohue21Timothy J. Donohue22Timothy J. Donohue23Daniel R. Noguera24Daniel R. Noguera25Daniel R. Noguera26Department of Civil and Environmental Engineering, University of Wisconsin-Madison, Madison, WI, United StatesGreat Lakes Bioenergy Research Center, Madison, WI, United StatesWisconsin Energy Institute, University of Wisconsin-Madison, Madison, WI, United StatesDepartment of Civil and Environmental Engineering, University of Wisconsin-Madison, Madison, WI, United StatesGreat Lakes Bioenergy Research Center, Madison, WI, United StatesWisconsin Energy Institute, University of Wisconsin-Madison, Madison, WI, United StatesGreat Lakes Bioenergy Research Center, Madison, WI, United StatesDepartment of Wood Science, University of British Columbia, Vancouver, BC, CanadaJoint BioEnergy Institute, Emeryville, CA, United StatesEnvironmental Genomics and Systems Biology Division, Lawrence Berkeley National Laboratory, Berkeley, CA, United StatesGreat Lakes Bioenergy Research Center, Madison, WI, United StatesWisconsin Energy Institute, University of Wisconsin-Madison, Madison, WI, United StatesGreat Lakes Bioenergy Research Center, Madison, WI, United StatesWisconsin Energy Institute, University of Wisconsin-Madison, Madison, WI, United StatesGreat Lakes Bioenergy Research Center, Madison, WI, United StatesDepartment of Wood Science, University of British Columbia, Vancouver, BC, CanadaJoint BioEnergy Institute, Emeryville, CA, United StatesEnvironmental Genomics and Systems Biology Division, Lawrence Berkeley National Laboratory, Berkeley, CA, United StatesGreat Lakes Bioenergy Research Center, Madison, WI, United StatesWisconsin Energy Institute, University of Wisconsin-Madison, Madison, WI, United StatesDepartment of Biochemistry, University of Wisconsin-Madison, Madison, WI, United StatesGreat Lakes Bioenergy Research Center, Madison, WI, United StatesWisconsin Energy Institute, University of Wisconsin-Madison, Madison, WI, United StatesDepartment of Bacteriology, University of Wisconsin-Madison, Madison, WI, United StatesDepartment of Civil and Environmental Engineering, University of Wisconsin-Madison, Madison, WI, United StatesGreat Lakes Bioenergy Research Center, Madison, WI, United StatesWisconsin Energy Institute, University of Wisconsin-Madison, Madison, WI, United StatesThe economic and environmental sustainability of lignocellulosic biomass biorefineries is predicated on generating biofuels and bioproducts from cell-wall polysaccharide and lignin polymers. Historical efforts in plant genetic engineering have focused on the development of strategies that facilitate biomass deconstruction, with more recently efforts including the synthesis of high-value chemicals in planta. One such genetic modification is the expression of the bacterial quinate and shikimate utilization B (qsuB) gene that increases the accumulation of protocatechuic acid in lignocellulosic biomass. Herein, we evaluated the effectiveness of an alkaline pretreatment process to extract phenolics directly from wild-type and QsuB-transgenic lines of Arabidopsis, poplar, and sorghum, and then upgrade them to the polyester precursor 2-pyrone-4,6-dicarboxylic acid (PDC) with an engineered strain of Novosphingobium aromaticivorans. Protocatechuic acid extracted from all QsuB transgenic lines was found to be mostly in the glycosylated form. Glycosylated protocatechuic acid and other plant-derived phenolics were effectively metabolized by N. aromaticivorans, and PDC production was greatest using extracts from an Arabidopsis QsuB transgenic line (∼5% w/w), followed by QsuB sorghum (∼1.1% w/w), and QsuB poplar (∼0.4% w/w) lines. The comparison of PDC production from wild-type and QsuB transgenic lines of Arabidopsis, poplar, and sorghum demonstrates the utility of a mild alkaline pretreatment to liberate phenolics from plant biomass that are either naturally present or that accumulate as a consequence of genetic engineering strategies. All QsuB transgenic lines outperformed their wild-type counterparts with respect to observed PDC yields. In addition, microbial funneling to PDC was effective even when most of the protocatechuic acid extracted was in glycosylated form, clearly demonstrating that this bacterium can metabolize these aromatic conjugates. These findings illustrate the benefits of combining plant and microbial engineering for bioproduct formation from phenolics in lignocellulosic biorefineries.https://www.frontiersin.org/articles/10.3389/fceng.2022.1036084/fullQsuBligninlignin valorizationvalue-added products2-pyrone-4,6-dicarboxylic acid (PDC)QsuB transgenics |
| spellingShingle | German E. Umana German E. Umana German E. Umana Jose M. Perez Jose M. Perez Jose M. Perez Faride Unda Faride Unda Chien-Yuan Lin Chien-Yuan Lin Canan Sener Canan Sener Steven D. Karlen Steven D. Karlen Shawn D. Mansfield Shawn D. Mansfield Aymerick Eudes Aymerick Eudes John Ralph John Ralph John Ralph Timothy J. Donohue Timothy J. Donohue Timothy J. Donohue Daniel R. Noguera Daniel R. Noguera Daniel R. Noguera Biological funneling of phenolics from transgenic plants engineered to express the bacterial 3-dehydroshikimate dehydratase (qsuB) gene Frontiers in Chemical Engineering QsuB lignin lignin valorization value-added products 2-pyrone-4,6-dicarboxylic acid (PDC) QsuB transgenics |
| title | Biological funneling of phenolics from transgenic plants engineered to express the bacterial 3-dehydroshikimate dehydratase (qsuB) gene |
| title_full | Biological funneling of phenolics from transgenic plants engineered to express the bacterial 3-dehydroshikimate dehydratase (qsuB) gene |
| title_fullStr | Biological funneling of phenolics from transgenic plants engineered to express the bacterial 3-dehydroshikimate dehydratase (qsuB) gene |
| title_full_unstemmed | Biological funneling of phenolics from transgenic plants engineered to express the bacterial 3-dehydroshikimate dehydratase (qsuB) gene |
| title_short | Biological funneling of phenolics from transgenic plants engineered to express the bacterial 3-dehydroshikimate dehydratase (qsuB) gene |
| title_sort | biological funneling of phenolics from transgenic plants engineered to express the bacterial 3 dehydroshikimate dehydratase qsub gene |
| topic | QsuB lignin lignin valorization value-added products 2-pyrone-4,6-dicarboxylic acid (PDC) QsuB transgenics |
| url | https://www.frontiersin.org/articles/10.3389/fceng.2022.1036084/full |
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