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Shrestha S, Goswami S, Banerjee D, Garcia V, Zhou E, Olmsted CN, Majumder ELW, Kumar D, Awasthi D, Mukhopadhyay A, Singer SW, Gladden JM, Simmons BA, Choudhary H. Perspective on Lignin Conversion Strategies That Enable Next Generation Biorefineries. CHEMSUSCHEM 2024:e202301460. [PMID: 38669480 DOI: 10.1002/cssc.202301460] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/09/2023] [Revised: 03/14/2024] [Indexed: 04/28/2024]
Abstract
The valorization of lignin, a currently underutilized component of lignocellulosic biomass, has attracted attention to promote a stable and circular bioeconomy. Successful approaches including thermochemical, biological, and catalytic lignin depolymerization have been demonstrated, enabling opportunities for lignino-refineries and lignocellulosic biorefineries. Although significant progress in lignin valorization has been made, this review describes unexplored opportunities in chemical and biological routes for lignin depolymerization and thereby contributes to economically and environmentally sustainable lignin-utilizing biorefineries. This review also highlights the integration of chemical and biological lignin depolymerization and identifies research gaps while also recommending future directions for scaling processes to establish a lignino-chemical industry.
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Affiliation(s)
- Shilva Shrestha
- Joint BioEnergy Institute, Emeryville, CA 94608, United States
- Biological Systems and Engineering Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, United States
- Department of Environmental Health and Engineering, Johns Hopkins University, Baltimore, MD 21205, United States
| | - Shubhasish Goswami
- Joint BioEnergy Institute, Emeryville, CA 94608, United States
- Biological Systems and Engineering Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, United States
| | - Deepanwita Banerjee
- Joint BioEnergy Institute, Emeryville, CA 94608, United States
- Biological Systems and Engineering Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, United States
| | - Valentina Garcia
- Joint BioEnergy Institute, Emeryville, CA 94608, United States
- Department of Biomanufacturing and Biomaterials, Sandia National Laboratories, Livermore, CA 94550, United States
| | - Elizabeth Zhou
- Joint BioEnergy Institute, Emeryville, CA 94608, United States
| | - Charles N Olmsted
- Department of Bacteriology, University of Wisconsin-Madison, Madison, WI 53706, United States
| | - Erica L-W Majumder
- Department of Bacteriology, University of Wisconsin-Madison, Madison, WI 53706, United States
| | - Deepak Kumar
- Department of Chemical Engineering, SUNY College of Environmental Science and Forestry, Syracuse, NY 13210, United States
| | - Deepika Awasthi
- Joint BioEnergy Institute, Emeryville, CA 94608, United States
- Biological Systems and Engineering Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, United States
| | - Aindrila Mukhopadhyay
- Joint BioEnergy Institute, Emeryville, CA 94608, United States
- Biological Systems and Engineering Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, United States
| | - Steven W Singer
- Joint BioEnergy Institute, Emeryville, CA 94608, United States
- Biological Systems and Engineering Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, United States
| | - John M Gladden
- Joint BioEnergy Institute, Emeryville, CA 94608, United States
- Department of Biomanufacturing and Biomaterials, Sandia National Laboratories, Livermore, CA 94550, United States
| | - Blake A Simmons
- Joint BioEnergy Institute, Emeryville, CA 94608, United States
- Biological Systems and Engineering Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, United States
| | - Hemant Choudhary
- Joint BioEnergy Institute, Emeryville, CA 94608, United States
- Department of Bioresource and Environmental Security, Sandia National Laboratories, Livermore, CA 94550, United States
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Li YX, Lin W, Han YH, Wang YQ, Wang T, Zhang H, Zhang Y, Wang SS. Biodegradation of p-hydroxybenzoic acid in Herbaspirillum aquaticum KLS-1 isolated from tailing soil: Characterization and molecular mechanism. JOURNAL OF HAZARDOUS MATERIALS 2023; 456:131669. [PMID: 37236108 DOI: 10.1016/j.jhazmat.2023.131669] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/02/2023] [Revised: 05/09/2023] [Accepted: 05/19/2023] [Indexed: 05/28/2023]
Abstract
The wide distribution of p-hydroxybenzoic acid (PHBA) in the environments has attracted great concerns due to its potential risks to organisms. Bioremediation is considered a green way to remove PHBA from environment. Here, a new PHBA-degrading bacterium Herbaspirillum aquaticum KLS-1was isolated and its PHBA degradation mechanisms were fully evaluated. Results showed that strain KLS-1 could utilize PHBA as the sole carbon source and completely degrade 500 mg/L PHBA within 18 h. The optimal conditions for bacterial growth and PHBA degradation were pH values of 6.0-8.0, temperatures of 30 °C-35 °C, shaking speed of 180 rpm, Mg2+ concentration of 2.0 mM and Fe2+ concentration of 1.0 mM. Draft genome sequencing and functional gene annotations identified three operons (i.e., pobRA, pcaRHGBD and pcaRIJ) and several free genes possibly participating in PHBA degradation. The key genes pobA, ubiA, fadA, ligK and ubiG involved in the regulation of protocatechuate and ubiquinone (UQ) metabolisms were successfully amplified in strain KLS-1 at mRNA level. Our data suggested that PHBA could be degraded by strain KLS-1 via the protocatechuate ortho-/meta-cleavage pathway and UQ biosynthesis pathway. This study has provided a new PHBA-degrading bacterium for potential bioremediation of PHBA pollution.
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Affiliation(s)
- Yi-Xi Li
- College of Environmental and Resource Science, Fujian Normal University, Fuzhou 350117, Fujian, China; Fujian Key Laboratory of Pollution Control and Resource Reuse, Fuzhou 350117, Fujian, China
| | - Wei Lin
- College of Life Science, Fujian Normal University, Fuzhou 350117, Fujian, China
| | - Yong-He Han
- College of Environmental and Resource Science, Fujian Normal University, Fuzhou 350117, Fujian, China; Fujian Key Laboratory of Pollution Control and Resource Reuse, Fuzhou 350117, Fujian, China.
| | - Yao-Qiang Wang
- College of Environmental and Resource Science, Fujian Normal University, Fuzhou 350117, Fujian, China; Fujian Key Laboratory of Pollution Control and Resource Reuse, Fuzhou 350117, Fujian, China
| | - Tao Wang
- College of Environmental and Resource Science, Fujian Normal University, Fuzhou 350117, Fujian, China; Fujian Key Laboratory of Pollution Control and Resource Reuse, Fuzhou 350117, Fujian, China
| | - Hong Zhang
- College of Environmental and Resource Science, Fujian Normal University, Fuzhou 350117, Fujian, China; Fujian Key Laboratory of Pollution Control and Resource Reuse, Fuzhou 350117, Fujian, China
| | - Yong Zhang
- College of Environmental and Resource Science, Fujian Normal University, Fuzhou 350117, Fujian, China; Fujian Key Laboratory of Pollution Control and Resource Reuse, Fuzhou 350117, Fujian, China
| | - Shan-Shan Wang
- College of Integrative Medicine, Fujian University of Traditional Chinese Medicine, Fuzhou 350122, China.
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Lignin Valorization: Production of High Value-Added Compounds by Engineered Microorganisms. Catalysts 2023. [DOI: 10.3390/catal13030555] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/12/2023] Open
Abstract
Lignin is the second most abundant polymer in nature, which is also widely generated during biomass fractionation in lignocellulose biorefineries. At present, most of technical lignin is simply burnt for energy supply although it represents the richest natural source of aromatics, and thus it is a promising feedstock for generation of value-added compounds. Lignin is heterogeneous in composition and recalcitrant to degradation, with this substantially hampering its use. Notably, microbes have evolved particular enzymes and specialized metabolic pathways to degrade this polymer and metabolize its various aromatic components. In recent years, novel pathways have been designed allowing to establish engineered microbial cell factories able to efficiently funnel the lignin degradation products into few metabolic intermediates, representing suitable starting points for the synthesis of a variety of valuable molecules. This review focuses on recent success cases (at the laboratory/pilot scale) based on systems metabolic engineering studies aimed at generating value-added and specialty chemicals, with much emphasis on the production of cis,cis-muconic acid, a building block of recognized industrial value for the synthesis of plastic materials. The upgrade of this global waste stream promises a sustainable product portfolio, which will become an industrial reality when economic issues related to process scale up will be tackled.
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