001     894762
005     20210912010929.0
024 7 _ |a 10.1101/2021.02.12.430943
|2 doi
024 7 _ |a 2128/28599
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037 _ _ |a FZJ-2021-03376
100 1 _ |a Labib, Mohamed
|0 P:(DE-Juel1)169979
|b 0
245 _ _ |a Metabolic and Process Engineering for Microbial Production of Protocatechuate from Xylose with Corynebacterium glutamicum
260 _ _ |c 2021
336 7 _ |a Preprint
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336 7 _ |a ARTICLE
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520 _ _ |a 3,4-Dihydroxybenzoate (protocatechuate, PCA) is a phenolic compound naturally found in edible vegetables and medicinal herbs. PCA is of interest in the chemical industry as a building block for novel polymers and has wide potential for pharmaceutical applications due to its antioxidant, anti-inflammatory, and antiviral properties. In the present study, we designed and constructed a novel Corynebacterium glutamicum strain to enable the efficient utilization of d -xylose for microbial production of PCA. The engineered strain showed a maximum PCA titer of 62.1 ± 12.1 mM (9.6 ± 1.9 g L −1 ) from d -xylose as the primary carbon and energy source. The corresponding yield was , which corresponds to 38 % of the maximum theoretical yield and is 14-fold higher compared to the parental producer strain on d -glucose. By establishing a one-pot bioreactor cultivation process followed by subsequent process optimization, the same maximum titer and a total amount of 16.5 ± 1.1 g was reached. Downstream processing of PCA from this fermentation broth was realized via electrochemically induced crystallization by taking advantage of the pH-dependent properties of PCA. Since PCA turned out to be electrochemically unstable in combination with several anode materials, a threechamber electrolysis setup was established to crystallize PCA and to avoid direct anode contact. This resulted in a maximum final purity of 95.4 %. In summary, the established PCA production process represents a highly sustainable approach, which will serve as a blueprint for the bio-based production of other hydroxybenzoic acids from alternative sugar feedstocks.
536 _ _ |a 2172 - Utilization of renewable carbon and energy sources and engineering of ecosystem functions (POF4-217)
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588 _ _ |a Dataset connected to CrossRef
700 1 _ |a Görtz, Jonas
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700 1 _ |a Brüsseler, Christian
|0 P:(DE-Juel1)166290
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700 1 _ |a Kallscheuer, Nicolai
|0 P:(DE-Juel1)157678
|b 3
700 1 _ |a Gätgens, Jochem
|0 P:(DE-Juel1)129023
|b 4
700 1 _ |a Jupke, Andreas
|0 0000-0001-6551-5695
|b 5
700 1 _ |a Marienhagen, Jan
|0 P:(DE-Juel1)144031
|b 6
700 1 _ |a Noack, Stephan
|0 P:(DE-Juel1)129050
|b 7
|e Corresponding author
773 _ _ |a 10.1101/2021.02.12.430943
856 4 _ |u https://juser.fz-juelich.de/record/894762/files/2021.02.12.430943.full.pdf
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913 1 _ |a DE-HGF
|b Forschungsbereich Erde und Umwelt
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914 1 _ |y 2021
915 _ _ |a OpenAccess
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915 _ _ |a Creative Commons Attribution CC BY 4.0
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