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Akutsu M, Abe N, Sakamoto C, Kurimoto Y, Sugita H, Tanaka M, Higuchi Y, Sakamoto K, Kamimura N, Kurihara H, Masai E, Sonoki T. Pseudomonas sp. NGC7 as a microbial chassis for glucose-free muconate production from a variety of lignin-derived aromatics and its application to the production from sugar cane bagasse alkaline extract. Bioresour Technol 2022; 359:127479. [PMID: 35714780 DOI: 10.1016/j.biortech.2022.127479] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/22/2022] [Revised: 06/11/2022] [Accepted: 06/13/2022] [Indexed: 06/15/2023]
Abstract
cis,cis-Muconate (ccMA) is a promising platform for use in synthesizing various polymers. A glucose-free ccMA production using Pseudomonas sp. NGC7 from hardwood lignin-derived aromatic compounds was previously reported. In that system, syringyl nucleus compounds were essential for growth. Here, it is shown that NGC7 is available for glucose-free ccMA production even from a mixture of lignin-derived aromatics that does not contain syringyl nucleus compounds. By introducing a gene set for the protocatechuate (PCA)-shunt consisting of PCA 3,4-dioxygenase and PCA decarboxylase into an NGC7-derived strain deficient in PCA 3,4-dioxygenase and ccMA cycloisomerase, it was succeeded in constructing a ccMA-producing strain that grows on a lignin-derived aromatics mixture containing no syringyl nucleus compounds. Finally, it is demonstrated that the engineered strain produced ccMA from sugar cane bagasse alkaline extract in 18.7 mol%. NGC7 is thus shown to be a promising microbial chassis for biochemicals production from lignin-derived aromatics.
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Affiliation(s)
- Miho Akutsu
- Faculty of Agriculture and Life Science, Hirosaki University, Hirosaki, Aomori 036-8561, Japan
| | - Nanase Abe
- Department of Materials Science and Bioengineering, Nagaoka University of Technology, Kamitomioka, Nagaoka, Niigata 940-2188, Japan
| | - Chiho Sakamoto
- Faculty of Agriculture and Life Science, Hirosaki University, Hirosaki, Aomori 036-8561, Japan
| | - Yuki Kurimoto
- Faculty of Agriculture and Life Science, Hirosaki University, Hirosaki, Aomori 036-8561, Japan
| | - Haruka Sugita
- Faculty of Agriculture and Life Science, Hirosaki University, Hirosaki, Aomori 036-8561, Japan
| | - Makoto Tanaka
- Faculty of Agriculture and Life Science, Hirosaki University, Hirosaki, Aomori 036-8561, Japan
| | - Yudai Higuchi
- Faculty of Agriculture and Life Science, Hirosaki University, Hirosaki, Aomori 036-8561, Japan
| | - Kimitoshi Sakamoto
- Faculty of Agriculture and Life Science, Hirosaki University, Hirosaki, Aomori 036-8561, Japan
| | - Naofumi Kamimura
- Department of Materials Science and Bioengineering, Nagaoka University of Technology, Kamitomioka, Nagaoka, Niigata 940-2188, Japan
| | - Hiroyuki Kurihara
- Toray Industries, Inc, New Frontiers Research Laboratories, Kamakura, Kanagawa 248-0036, Japan
| | - Eiji Masai
- Department of Materials Science and Bioengineering, Nagaoka University of Technology, Kamitomioka, Nagaoka, Niigata 940-2188, Japan
| | - Tomonori Sonoki
- Faculty of Agriculture and Life Science, Hirosaki University, Hirosaki, Aomori 036-8561, Japan.
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Johnson CW, Salvachúa D, Khanna P, Smith H, Peterson DJ, Beckham GT. Enhancing muconic acid production from glucose and lignin-derived aromatic compounds via increased protocatechuate decarboxylase activity. Metab Eng Commun 2016; 3:111-119. [PMID: 29468118 PMCID: PMC5779730 DOI: 10.1016/j.meteno.2016.04.002] [Citation(s) in RCA: 125] [Impact Index Per Article: 15.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2016] [Revised: 04/01/2016] [Accepted: 04/21/2016] [Indexed: 11/28/2022] Open
Abstract
The conversion of biomass-derived sugars and aromatic molecules to cis,cis-muconic acid (referred to hereafter as muconic acid or muconate) has been of recent interest owing to its facile conversion to adipic acid, an important commodity chemical. Metabolic routes to produce muconate from both sugars and many lignin-derived aromatic compounds require the use of a decarboxylase to convert protocatechuate (PCA, 3,4-dihydroxybenzoate) to catechol (1,2-dihydroxybenzene), two central aromatic intermediates in this pathway. Several studies have identified the PCA decarboxylase as a metabolic bottleneck, causing an accumulation of PCA that subsequently reduces muconate production. A recent study showed that activity of the PCA decarboxylase is enhanced by co-expression of two genetically associated proteins, one of which likely produces a flavin-derived cofactor utilized by the decarboxylase. Using entirely genome-integrated gene expression, we have engineered Pseudomonas putida KT2440-derived strains to produce muconate from either aromatic molecules or sugars and demonstrate in both cases that co-expression of these decarboxylase associated proteins reduces PCA accumulation and enhances muconate production relative to strains expressing the PCA decarboxylase alone. In bioreactor experiments, co-expression increased the specific productivity (mg/g cells/h) of muconate from the aromatic lignin monomer p-coumarate by 50% and resulted in a titer of >15 g/L. In strains engineered to produce muconate from glucose, co-expression more than tripled the titer, yield, productivity, and specific productivity, with the best strain producing 4.92±0.48 g/L muconate. This study demonstrates that overcoming the PCA decarboxylase bottleneck can increase muconate yields from biomass-derived sugars and aromatic molecules in industrially relevant strains and cultivation conditions. We engineered Pseudomonas putida to produce muconate from p-coumarate and glucose. A protocatechuate decarboxylase was expressed with two associated proteins. Co-expression of these proteins reduced protocatechuate accumulation. Co-expression of these proteins reduced enhanced muconate production up to 3X. 15.6 g/L muconate was produced from p-coumarate and 4.92 g/L from glucose
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Affiliation(s)
- Christopher W Johnson
- National Bioenergy Center, National Renewable Energy Laboratory, Golden, CO 80401, United States
| | - Davinia Salvachúa
- National Bioenergy Center, National Renewable Energy Laboratory, Golden, CO 80401, United States
| | - Payal Khanna
- National Bioenergy Center, National Renewable Energy Laboratory, Golden, CO 80401, United States
| | - Holly Smith
- National Bioenergy Center, National Renewable Energy Laboratory, Golden, CO 80401, United States
| | - Darren J Peterson
- National Bioenergy Center, National Renewable Energy Laboratory, Golden, CO 80401, United States
| | - Gregg T Beckham
- National Bioenergy Center, National Renewable Energy Laboratory, Golden, CO 80401, United States
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