1
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Austin AT, Ballaré CL. Photodegradation in terrestrial ecosystems. THE NEW PHYTOLOGIST 2024; 244:769-785. [PMID: 39262084 DOI: 10.1111/nph.20105] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/20/2024] [Accepted: 06/26/2024] [Indexed: 09/13/2024]
Abstract
The first step in carbon (C) turnover, where senesced plant biomass is converted through various pathways into compounds that are released to the atmosphere or incorporated into the soil, is termed litter decomposition. This review is focused on recent advances of how solar radiation can affect this important process in terrestrial ecosystems. We explore the photochemical degradation of plant litter and its consequences for biotic decomposition and C cycling. The ubiquitous presence of lignin in plant tissues poses an important challenge for enzymatic litter decomposition due to its biological recalcitrance, creating a substantial bottleneck for decomposer organisms. The recognition that lignin is also photolabile and can be rapidly altered by natural doses of sunlight to increase access to cell wall carbohydrates and even bolster the activity of cell wall degrading enzymes highlights a novel role for lignin in modulating rates of litter decomposition. Lignin represents a key functional connector between photochemistry and biochemistry with important consequences for our understanding of how sunlight exposure may affect litter decomposition in a wide range of terrestrial ecosystems. A mechanistic understanding of how sunlight controls litter decomposition and C turnover can help inform management and other decisions related to mitigating human impact on the planet.
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Affiliation(s)
- Amy T Austin
- IFEVA, Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Facultad de Agronomía, Universidad de Buenos Aires, Av. San Martín 4453, C1417DSE, Buenos Aires, Argentina
| | - Carlos L Ballaré
- IFEVA, Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Facultad de Agronomía, Universidad de Buenos Aires, Av. San Martín 4453, C1417DSE, Buenos Aires, Argentina
- IIBio, Consejo Nacional de Investigaciones Científicas y Técnicas, Universidad Nacional de San Martín, B1650HMP, Buenos Aires, Argentina
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2
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Rahman MU, Ullah MW, Alabbosh KF, Shah JA, Muhammad N, Zahoor, Shah SWA, Nawab S, Sethupathy S, Abdikakharovich SA, Khan KA, Elboughdiri N, Zhu D. Lignin valorization through the oxidative activity of β-etherases: Recent advances and perspectives. Int J Biol Macromol 2024; 281:136383. [PMID: 39395522 DOI: 10.1016/j.ijbiomac.2024.136383] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2024] [Revised: 09/10/2024] [Accepted: 10/05/2024] [Indexed: 10/14/2024]
Abstract
The increasing interest in lignin, a complex and abundant biopolymer, stems from its ability to produce environmentally beneficial biobased products. β-Etherases play a crucial role by breaking down the β-aryl ether bonds in lignin. This comprehensive review covers the latest advancements in β-etherase-mediated lignin valorization, focusing on substrate selectivity, enzymatic oxidative activity, and engineering methods. Research on the microbial origin, protein modification, and molecular structure determination of β-etherases has improved our understanding of their effectiveness. Furthermore, the use of these enzymes in biorefinery processes is promising for enhancing lignin breakdown and creating more valuable products. The review also discusses the challenges and future potential of β-etherases in advancing lignin valorization for biorefinery applications that are economically viable and environmentally sustainable.
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Affiliation(s)
- Mujeeb Ur Rahman
- Biofuels Institute, School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang 212013, PR China; Jiangsu Collaborative Innovation Center of Technology and Material of Water Treatment, Suzhou University of Science and Technology, Suzhou 215009, PR China
| | - Muhammad Wajid Ullah
- Department of Pulp & Paper Engineering, College of Light Industry and Food Engineering, Nanjing Forestry University, Nanjing 210037, PR China.
| | | | - Junaid Ali Shah
- Department of Molecular Biology and Biochemistry, College of Life Sciences, China Normal University, Shanghai 200241, PR China
| | - Nizar Muhammad
- COMSATS University Islamabad, Abbottabad Campus, Abbottabad, Pakistan
| | - Zahoor
- Biofuels Institute, School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang 212013, PR China
| | - Syed Waqas Ali Shah
- Biofuels Institute, School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang 212013, PR China
| | - Said Nawab
- Biofuels Institute, School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang 212013, PR China
| | - Sivasamy Sethupathy
- Biofuels Institute, School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang 212013, PR China; Jiangsu Collaborative Innovation Center of Technology and Material of Water Treatment, Suzhou University of Science and Technology, Suzhou 215009, PR China
| | | | - Khalid Ali Khan
- Applied College & Center of Bee Research and its Products (CBRP), King Khalid University, Abha 61413, Saudi Arabia
| | - Noureddine Elboughdiri
- Chemical Engineering Department, College of Engineering, University of Ha'il, P.O. Box 2440, Ha'il 81441, Saudi Arabia
| | - Daochen Zhu
- Biofuels Institute, School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang 212013, PR China; Jiangsu Collaborative Innovation Center of Technology and Material of Water Treatment, Suzhou University of Science and Technology, Suzhou 215009, PR China.
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3
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Putra FJN, Kahar P, Kondo A, Ogino C. Adaptive laboratory evolution of Lipomyces starkeyi for high production of lignin derivative alcohol and lipids with comparative untargeted metabolomics-based analysis. Microb Cell Fact 2024; 23:270. [PMID: 39379959 PMCID: PMC11463098 DOI: 10.1186/s12934-024-02542-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2024] [Accepted: 09/27/2024] [Indexed: 10/10/2024] Open
Abstract
BACKGROUND Adaptive laboratory evolution (ALE) is an impactful technique for cultivating microorganisms to adapt to specific environmental circumstances or substrates through iterative growth and selection. This study utilized an adaptive laboratory evolution method on Lipomyces starkeyi for high tolerance in producing lignin derivative alcohols and lipids from syringaldehyde. Afterward, untargeted metabolomics analysis was employed to find the key metabolites that play important roles in the better performance of evolved strains compared to the wild type. Lignin, a prominent constituent of plant biomass, is a favorable source material for the manufacture of biofuel and lipids. Nevertheless, the effective transformation of chemicals produced from lignin into products with high economic worth continues to be a difficult task. RESULTS In this study, we exposed L. starkeyi to a series of flask passaging experiments while applying selective pressure to facilitate its adaptation to syringaldehyde, a specific type of lignin monomeric aldehyde. Using ALE, we successfully developed a new strain, DALE-22, which can synthesize syringyl alcohol up to 18.74 mM from 22.28 mM syringaldehyde with 41.9% lipid accumulation. In addition, a comprehensive examination of untargeted metabolomics identified six specific crucial metabolites linked to the improved tolerance of the evolved strain in the utilization of syringaldehyde, including 2-aminobutyric acid, allantoin, 4-hydroxyphenethyl alcohol, 2-aminoethanol, tryptophan, and 5-aminovaleric acid. CONCLUSION The results of our study reveal how L. starkeyi adapts to using substrates produced from lignin. These findings offer important information for developing strategies to improve the process of converting lignin into valuable products for sustainable biorefinery applications.
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Affiliation(s)
- Filemon Jalu Nusantara Putra
- Department of Chemical Science and Engineering, Graduate School of Engineering, Kobe University, 1-1 Rokkodaicho, Nada-Ku, Kobe, 657-8501, Japan
| | - Prihardi Kahar
- Department of Chemical Science and Engineering, Graduate School of Engineering, Kobe University, 1-1 Rokkodaicho, Nada-Ku, Kobe, 657-8501, Japan
| | - Akihiko Kondo
- Graduate School of Science, Technology and Innovation, Kobe University, 1-1 Rokkodaicho, Nada-Ku, Kobe, 657-8501, Japan
| | - Chiaki Ogino
- Department of Chemical Science and Engineering, Graduate School of Engineering, Kobe University, 1-1 Rokkodaicho, Nada-Ku, Kobe, 657-8501, Japan.
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4
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Park JY, Han S, Kim D, Nguyen TVT, Nam Y, Kim SM, Chang R, Kim YH. Enhancing the thermostability of lignin peroxidase: Heme as a keystone cofactor driving stability changes in heme enzymes. Heliyon 2024; 10:e37235. [PMID: 39319129 PMCID: PMC11419925 DOI: 10.1016/j.heliyon.2024.e37235] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2024] [Revised: 08/15/2024] [Accepted: 08/29/2024] [Indexed: 09/26/2024] Open
Abstract
Heme-containing enzymes, critical across life's domains and promising for industrial use, face stability challenges. Despite the demand for robust industrial biocatalysts, the mechanisms underlying the thermal stability of heme enzymes remain poorly understood. Addressing this, our research utilizes a 'keystone cofactor heme-interaction approach' to enhance ligand binding and improve the stability of lignin peroxidase (LiP). We engineered mutants of the white-rot fungus PcLiP (Phanerochaete chrysosporium) to increase thermal stability by 8.66 °C and extend half-life by 29 times without losing catalytic efficiency at 60 °C, where typically, wild-type enzymes degrade. Molecular dynamics simulations reveal that an interlocked cofactor moiety contributes to enhanced structural stability in LiP variants. Additionally, a stability index developed from these simulations accurately predicts stabilizing mutations in other PcLiP isozymes. Using milled wood lignin, these mutants achieved triple the conversion yields at 40 °C compared to the wild type, offering insights for more sustainable white biotechnology through improved enzyme stability.
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Affiliation(s)
- Joo Yeong Park
- School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST), 50, UNIST-gil, Ulsan, 44919, Republic of Korea
| | - Seunghyun Han
- School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST), 50, UNIST-gil, Ulsan, 44919, Republic of Korea
| | - Doa Kim
- School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST), 50, UNIST-gil, Ulsan, 44919, Republic of Korea
| | - Trang Vu Thien Nguyen
- School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST), 50, UNIST-gil, Ulsan, 44919, Republic of Korea
| | - Youhyun Nam
- Department of Applied Chemistry, University of Seoul, 163, Seoulsiripdae-ro, Seoul, 02504, Republic of Korea
| | - Suk Min Kim
- School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST), 50, UNIST-gil, Ulsan, 44919, Republic of Korea
| | - Rakwoo Chang
- Department of Applied Chemistry, University of Seoul, 163, Seoulsiripdae-ro, Seoul, 02504, Republic of Korea
| | - Yong Hwan Kim
- School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST), 50, UNIST-gil, Ulsan, 44919, Republic of Korea
- Graduate School of Carbon Neutrality, Ulsan National Institute of Science and Technology (UNIST), 50, UNIST-gil, Ulsan, 44919, Republic of Korea
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5
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Molinari F, Salini A, Vittore A, Santoro O, Izzo L, Fusco S, Pollegioni L, Rosini E. Bio-based production of cis,cis-muconic acid as platform for a sustainable polymers production. BIORESOURCE TECHNOLOGY 2024; 408:131190. [PMID: 39094966 DOI: 10.1016/j.biortech.2024.131190] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/04/2024] [Revised: 07/28/2024] [Accepted: 07/30/2024] [Indexed: 08/04/2024]
Abstract
Production of the high industrial value cis,cis-muconic acid (ccMA) from renewable biomasses is of main interest especially when biological (green) processes are used. We recently generated a E. coli strain expressing five recombinant enzymes to convert vanillin (VA, from lignin) into ccMA. Here, we optimized a growing cell approach in bioreactor for the ccMA production. The medium composition, fermentation conditions, and VA addition were tuned: pulse-feeding VA at 1 mmol/h allowed to reach 5.2 g/L of ccMA in 48 h (0.86 g ccMA/g VA), with a productivity 4-fold higher compared to the resting cells approach, thus resulting in significantly lower E-factor and Process Mass Intensity green metric parameters. The recovered ccMA has been used as building block to produce a fully bioderived polymer with rubber-like properties. The sustainable optimized bioprocess can be considered an integrated approach to develop a platform for bio-based polymers production from renewable feedstocks.
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Affiliation(s)
- Filippo Molinari
- Department of Biotechnology and Life Sciences, University of Insubria, via J. H. Dunant 3, 21100 Varese, Italy
| | - Andrea Salini
- Biochemistry and Industrial Biotechnology (BIB) Laboratory, Department of Biotechnology, University of Verona, Strada le Grazie 15, 37134 Verona, Italy
| | - Aniello Vittore
- Department of Biotechnology and Life Sciences, University of Insubria, via J. H. Dunant 3, 21100 Varese, Italy
| | - Orlando Santoro
- Department of Biotechnology and Life Sciences, University of Insubria, via J. H. Dunant 3, 21100 Varese, Italy
| | - Lorella Izzo
- Department of Biotechnology and Life Sciences, University of Insubria, via J. H. Dunant 3, 21100 Varese, Italy
| | - Salvatore Fusco
- Biochemistry and Industrial Biotechnology (BIB) Laboratory, Department of Biotechnology, University of Verona, Strada le Grazie 15, 37134 Verona, Italy
| | - Loredano Pollegioni
- Department of Biotechnology and Life Sciences, University of Insubria, via J. H. Dunant 3, 21100 Varese, Italy
| | - Elena Rosini
- Department of Biotechnology and Life Sciences, University of Insubria, via J. H. Dunant 3, 21100 Varese, Italy.
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6
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Mubayi V, Ahern CB, Calusinska M, O’Malley MA. Toward a Circular Bioeconomy: Designing Microbes and Polymers for Biodegradation. ACS Synth Biol 2024; 13:1978-1993. [PMID: 38918080 PMCID: PMC11264326 DOI: 10.1021/acssynbio.4c00077] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2024] [Revised: 06/11/2024] [Accepted: 06/12/2024] [Indexed: 06/27/2024]
Abstract
Polymer production is rapidly increasing, but there are no large-scale technologies available to effectively mitigate the massive accumulation of these recalcitrant materials. One potential solution is the development of a carbon-neutral polymer life cycle, where microorganisms convert plant biomass to chemicals, which are used to synthesize biodegradable materials that ultimately contribute to the growth of new plants. Realizing a circular carbon life cycle requires the integration of knowledge across microbiology, bioengineering, materials science, and organic chemistry, which itself has hindered large-scale industrial advances. This review addresses the biodegradation status of common synthetic polymers, identifying novel microbes and enzymes capable of metabolizing these recalcitrant materials and engineering approaches to enhance their biodegradation pathways. Design considerations for the next generation of biodegradable polymers are also reviewed, and finally, opportunities to apply findings from lignocellulosic biodegradation to the design and biodegradation of similarly recalcitrant synthetic polymers are discussed.
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Affiliation(s)
- Vikram Mubayi
- Department
of Chemical Engineering, University of California, Santa Barbara, California 93106, United States
| | - Colleen B. Ahern
- Department
of Chemical Engineering, University of California, Santa Barbara, California 93106, United States
| | - Magdalena Calusinska
- Department
of Chemical Engineering, University of California, Santa Barbara, California 93106, United States
- Environmental
Research and Innovation Department, Luxembourg
Institute of Science and Technology, L-4422 Belvaux, Luxembourg
| | - Michelle A. O’Malley
- Department
of Chemical Engineering, University of California, Santa Barbara, California 93106, United States
- Department
of Bioengineering, University of California, Santa Barbara, California 93106, United States
- Joint
BioEnergy Institute (JBEI), Emeryville, California 94608, United States
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7
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Ma D, Chen H, Liu D, Feng C, Hua Y, Gu T, Guo X, Zhou Y, Wang H, Tong G, Li H, Zhang K. Soil-derived cellulose-degrading bacteria: screening, identification, the optimization of fermentation conditions, and their whole genome sequencing. Front Microbiol 2024; 15:1409697. [PMID: 39050626 PMCID: PMC11266136 DOI: 10.3389/fmicb.2024.1409697] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2024] [Accepted: 06/27/2024] [Indexed: 07/27/2024] Open
Abstract
Straw cellulose is an abundant renewable resource in nature. In recent years, the conversion of cellulose from waste straw into biofuel by specific microorganisms' fragmentation has attracted extensive attention. Although many bacteria with the ability to degrade cellulose have been identified, comprehensive bioinformatics analyses of these bacteria remain limited, and research exploring optimal fragmentation conditions is scarce. Our study involved the isolation and screening of bacteria from various locations in Yangzhou using carboxymethyl cellulose (CMC) media. Then, the cellulose-degrading bacteria were identified using 16S rRNA and seven candidate bacterial strains with cellulose degrading ability were identified in Yangzhou city for the first time. The cellulase activity was determined by the 3,5-dinitrosalicylic acid (DNS) method in different fragmentation conditions, and finally two bacteria strains with the strongest cellulose degradation ability were selected for whole genome sequencing analysis. Sequencing results revealed that the genome sizes of Rhodococcus wratislaviensis YZ02 and Pseudomonas Xanthosomatis YZ03 were 8.51 Mb and 6.66 Mb, containing 8,466 and 5,745 genes, respectively. A large number of cellulose degradation-related genes were identified and annotated using KEGG, GO and COG analyses. In addition, genomic CAZyme analysis indicated that both R. wratislaviensis YZ02 and P. Xanthosomatis YZ03 harbor a series of glycoside hydrolase family (GH) genes and other genes related to cellulose degradation. Our finding provides new options for the development of cellulose-degrading bacteria and a theoretical basis for improving the cellulose utilization of straw.
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Affiliation(s)
- Degao Ma
- Yangzhou Environmental Monitoring Center of Jiangsu Province, Yangzhou, China
| | - Haoyu Chen
- College of Plant Protection, Yangzhou University, Yangzhou, China
| | - Duxuan Liu
- College of Plant Protection, Yangzhou University, Yangzhou, China
| | - Chenwei Feng
- College of Plant Protection, Yangzhou University, Yangzhou, China
| | - Yanhong Hua
- College of Plant Protection, Yangzhou University, Yangzhou, China
| | - Tianxiao Gu
- College of Plant Protection, Yangzhou University, Yangzhou, China
| | - Xiao Guo
- College of Plant Protection, Yangzhou University, Yangzhou, China
| | - Yuchen Zhou
- Department of Pharmacy, Medical School of Yangzhou University, Yangzhou University, Yangzhou, China
| | - Houjun Wang
- Yangzhou Environmental Monitoring Center of Jiangsu Province, Yangzhou, China
| | - Guifeng Tong
- Yangzhou Environmental Monitoring Center of Jiangsu Province, Yangzhou, China
| | - Hua Li
- College of Engineering, Nanjing Agricultural University, Nanjing, China
| | - Kun Zhang
- College of Plant Protection, Yangzhou University, Yangzhou, China
- Joint International Research Laboratory of Agriculture and Agri-Product Safety of Ministry of Education of China, Yangzhou University, Yangzhou, China
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8
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Ruan L, Wu H, Wu S, Zhou L, Wu S, Shang C. Optimizing the Conditions of Pretreatment and Enzymatic Hydrolysis of Sugarcane Bagasse for Bioethanol Production. ACS OMEGA 2024; 9:29566-29575. [PMID: 39005808 PMCID: PMC11238294 DOI: 10.1021/acsomega.4c02485] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/15/2024] [Revised: 06/19/2024] [Accepted: 06/20/2024] [Indexed: 07/16/2024]
Abstract
The agricultural waste sugarcane bagasse (SCB) is a kind of plentiful biomass resource. In this study, different pretreatment methods (NaOH, H2SO4, and sodium percarbonate/glycerol) were utilized and compared. Among the three pretreatment methods, NaOH pretreatment was the most optimal method. Response surface methodology (RSM) was utilized to optimize NaOH pretreatment conditions. After optimization by RSM, the solid yield and lignin removal were 54.60 and 82.30% under the treatment of 1% NaOH, a time of 60 min, and a solid-to-liquid ratio of 1:15, respectively. Then, the enzymolysis conditions of cellulase for NaOH-treated SCB were optimized by RSM. Under the optimal enzymatic hydrolysis conditions (an enzyme dose of 18 FPU/g, a time of 64 h, and a solid-to-liquid ratio of 1:30), the actual yield of reducing sugar in the enzyme-treated hydrolysate was 443.52 mg/g SCB with a cellulose conversion rate of 85.33%. A bacterium, namely, Bacillus sp. EtOH, which produced ethanol and Baijiu aroma substances, was isolated from the high-temperature Daqu of Danquan Baijiu in our previous study. At last, when the strain EtOH was cultured for 36 h in a fermentation medium (reducing sugar from cellulase-treated SCB hydrolysate, yeast extract, and peptone), ethanol concentration reached 2.769 g/L (0.353%, v/v). The sugar-to-ethanol and SCB-to-ethanol yields were 13.85 and 11.81% in this study, respectively. In brief, after NaOH pretreatment, 1 g of original SCB produced 0.5460 g of NaOH-treated SCB. Then, after the enzymatic hydrolysis, reducing sugar yield (443.52 mg/g SCB) was obtained. Our study provided a suitable method for bioethanol production from SCB, which achieved efficient resource utilization of agricultural waste SCB.
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Affiliation(s)
- Lingru Ruan
- Key Laboratory of Ecology
of Rare and Endangered Species and Environmental Protection (Guangxi
Normal University), Ministry of Education & Guangxi Key Laboratory
of Landscape Resources Conservation and Sustainable Utilization in
Lijiang River Basin, Guangxi Normal University, Guilin 541006, China
| | - Haifeng Wu
- Key Laboratory of Ecology
of Rare and Endangered Species and Environmental Protection (Guangxi
Normal University), Ministry of Education & Guangxi Key Laboratory
of Landscape Resources Conservation and Sustainable Utilization in
Lijiang River Basin, Guangxi Normal University, Guilin 541006, China
| | - Shiya Wu
- Key Laboratory of Ecology
of Rare and Endangered Species and Environmental Protection (Guangxi
Normal University), Ministry of Education & Guangxi Key Laboratory
of Landscape Resources Conservation and Sustainable Utilization in
Lijiang River Basin, Guangxi Normal University, Guilin 541006, China
| | - Lifei Zhou
- Key Laboratory of Ecology
of Rare and Endangered Species and Environmental Protection (Guangxi
Normal University), Ministry of Education & Guangxi Key Laboratory
of Landscape Resources Conservation and Sustainable Utilization in
Lijiang River Basin, Guangxi Normal University, Guilin 541006, China
| | - Shangxin Wu
- Key Laboratory of Ecology
of Rare and Endangered Species and Environmental Protection (Guangxi
Normal University), Ministry of Education & Guangxi Key Laboratory
of Landscape Resources Conservation and Sustainable Utilization in
Lijiang River Basin, Guangxi Normal University, Guilin 541006, China
| | - Changhua Shang
- Key Laboratory of Ecology
of Rare and Endangered Species and Environmental Protection (Guangxi
Normal University), Ministry of Education & Guangxi Key Laboratory
of Landscape Resources Conservation and Sustainable Utilization in
Lijiang River Basin, Guangxi Normal University, Guilin 541006, China
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9
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Luisa de Castro E Silva H, Robles-Aguilar AA, Akyol Ç, Willems B, Meers E. Potential availability of metals in anaerobic mono- and co-digestion of pig manure and maize. BIORESOURCE TECHNOLOGY 2024; 402:130818. [PMID: 38735342 DOI: 10.1016/j.biortech.2024.130818] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/07/2024] [Revised: 05/06/2024] [Accepted: 05/07/2024] [Indexed: 05/14/2024]
Abstract
This study aims to analyse the potential availability of essential metals including as Co, Fe, Ni, Zn, Mn, and Cu and non-essential metals such as Pb, Cr, and Cd within anaerobic mono- and co-digestion of pig manure and maize. The metals partitioning was determined using the Modified BCR (European Community Bureau of Reference) sequential extraction at defined intervals over a 45-days period, correlating changes in metals speciation with key digestion variables. The findings revealed that Cr, Cu, Fe, and Pb were predominantly associated with the oxidisable fraction, while Zn, Mn, and Cd were potentially available in both processes. Notably, NH4+-N and the VFAs, except propionic acid, correlated significantly with the available fractions of Co, Mn, Ni, Zn, Cr, and Pb during mono-digestion of pig manure. The wider pH range and the chemical properties of the feedstock in co-digestion resulted in varied correlations between the metals availability and the digestion variables.
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Affiliation(s)
- Hellen Luisa de Castro E Silva
- Laboratory for Bioresource Recovery, Department of Green Chemistry and Technology, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, 9000 Gent, Belgium.
| | - Ana A Robles-Aguilar
- BETA Technological Center. Futurlab, Can Baumann Ctra de Roda 70, 08500 Vic, Spain
| | - Çağrı Akyol
- Laboratory for Bioresource Recovery, Department of Green Chemistry and Technology, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, 9000 Gent, Belgium
| | | | - Erik Meers
- Laboratory for Bioresource Recovery, Department of Green Chemistry and Technology, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, 9000 Gent, Belgium
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10
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Hussain A, Parveen F, Saxena A, Ashfaque M. A review of nanotechnology in enzyme cascade to address challenges in pre-treating biomass. Int J Biol Macromol 2024; 270:132466. [PMID: 38761904 DOI: 10.1016/j.ijbiomac.2024.132466] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2024] [Revised: 05/09/2024] [Accepted: 05/15/2024] [Indexed: 05/20/2024]
Abstract
Nanotechnology has become a revolutionary technique for improving the preliminary treatment of lignocellulosic biomass in the production of biofuels. Traditional methods of pre-treatment have encountered difficulties in effectively degrading the intricate lignocellulosic composition, thereby impeding the conversion of biomass into fermentable sugars. Nanotechnology has enabled the development of enzyme cascade processes that present a potential solution for addressing the limitations. The focus of this review article is to delve into the utilization of nanotechnology in the pretreatment of lignocellulosic biomass through enzyme cascade processes. The review commences with an analysis of the composition and structure of lignocellulosic biomass, followed by a discussion on the drawbacks associated with conventional pre-treatment techniques. The subsequent analysis explores the importance of efficient pre-treatment methods in the context of biofuel production. We thoroughly investigate the utilization of nanotechnology in the pre-treatment of enzyme cascades across three distinct sections. Nanomaterials for enzyme immobilization, enhanced enzyme stability and activity through nanotechnology, and nanocarriers for controlled enzyme delivery. Moreover, the techniques used to analyse nanomaterials and the interactions between enzymes and nanomaterials are introduced. This review emphasizes the significance of comprehending the mechanisms underlying the synergy between nanotechnology and enzymes establishing sustainable and environmentally friendly nanotechnology applications.
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Affiliation(s)
- Akhtar Hussain
- Lignocellulose & Biofuel Laboratory, Department of Biosciences, Integral University, Lucknow 226026, Uttar Pradesh, India
| | - Fouziya Parveen
- Lignocellulose & Biofuel Laboratory, Department of Biosciences, Integral University, Lucknow 226026, Uttar Pradesh, India
| | - Ayush Saxena
- Lignocellulose & Biofuel Laboratory, Department of Biosciences, Integral University, Lucknow 226026, Uttar Pradesh, India
| | - Mohammad Ashfaque
- Lignocellulose & Biofuel Laboratory, Department of Biosciences, Integral University, Lucknow 226026, Uttar Pradesh, India.
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11
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van Brenk B, Kruidhof L, Kemperman AJB, van der Meer WGJ, Wösten HAB. Discoloration of textile dyes by spent mushroom substrate of Agaricus bisporus. BIORESOURCE TECHNOLOGY 2024; 402:130807. [PMID: 38723727 DOI: 10.1016/j.biortech.2024.130807] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/05/2023] [Revised: 12/18/2023] [Accepted: 05/05/2024] [Indexed: 05/13/2024]
Abstract
The textile industry discharges up to 5 % of their dyes in aqueous effluents. Here, use of spent mushroom substrate (SMS) of commercial white button mushroom production and its aqueous extract, SMS tea, was assessed to remove textile dyes from water. A total of 30-90 % and 5-85 % of the dyes was removed after a 24 h incubation in SMS and SMS tea, respectively. Removal of malachite green and remazol brilliant blue R was similar in SMS and its tea. In contrast, removal of crystal violet, orange G, and rose bengal was higher in SMS, explained by sorption to SMS and by the role of non-water-extractable SMS components in discoloration. Heat-treating SMS and its tea, thereby inactivating enzymes, reduced dye removal to 8-58 % and 0-31 %, respectively, indicating that dyes are removed by both enzymatic and non-enzymatic activities. Together, SMS of white button mushroom production has high potential to treat textile-dye-polluted aqueous effluents.
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Affiliation(s)
- Brigit van Brenk
- Microbiology, Department of Biology, Utrecht University, Padualaan 8, 3584 CH Utrecht, the Netherlands
| | - Leodie Kruidhof
- Microbiology, Department of Biology, Utrecht University, Padualaan 8, 3584 CH Utrecht, the Netherlands
| | - Antoine J B Kemperman
- Membrane Science and Technology Cluster, University of Twente, P.O. Box 217, 7500 AE Enschede, the Netherlands
| | - Walter G J van der Meer
- Membrane Science and Technology Cluster, University of Twente, P.O. Box 217, 7500 AE Enschede, the Netherlands; Oasen N.V., P.O. Box 122, 2800 AC Gouda, the Netherlands
| | - Han A B Wösten
- Microbiology, Department of Biology, Utrecht University, Padualaan 8, 3584 CH Utrecht, the Netherlands.
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12
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Hermann E, Rodrigues CF, Martins LO, Peterbauer C, Oostenbrink C. Engineering A-type Dye-Decolorizing Peroxidases by Modification of a Conserved Glutamate Residue. Chembiochem 2024; 25:e202300872. [PMID: 38376941 DOI: 10.1002/cbic.202300872] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2023] [Revised: 02/08/2024] [Accepted: 02/20/2024] [Indexed: 02/21/2024]
Abstract
Dye-decolorizing peroxidases (DyPs) are recently identified microbial enzymes that have been used in several Biotechnology applications from wastewater treatment to lignin valorization. However, their properties and mechanism of action still have many open questions. Their heme-containing active site is buried by three conserved flexible loops with a putative role in modulating substrate access and enzyme catalysis. Here, we investigated the role of a conserved glutamate residue in stabilizing interactions in loop 2 of A-type DyPs. First, we did site saturation mutagenesis of this residue, replacing it with all possible amino acids in bacterial DyPs from Bacillus subtilis (BsDyP) and from Kitasatospora aureofaciens (KaDyP1), the latter being characterized here for the first time. We screened the resulting libraries of variants for activity towards ABTS and identified variants with increased catalytic efficiency. The selected variants were purified and characterized for activity and stability. We furthermore used Molecular Dynamics simulations to rationalize the increased catalytic efficiency and found that the main reason is the electron channeling becoming easier from surface-exposed tryptophans. Based on our findings, we also propose that this glutamate could work as a pH switch in the wild-type enzyme, preventing intracellular damage.
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Affiliation(s)
- Enikö Hermann
- Institute of Food Technology, Department of Food Science and Technology, University of Natural Resources and Life Sciences, Vienna, Muthgasse 11, 1190, Vienna, Austria
- Institute for Molecular Modeling and Simulation, Department of Material Science and Life Sciences, University of Natural Resources and Life Sciences, Vienna, Muthgasse 18, 1190, Vienna, Austria
| | - Carolina F Rodrigues
- Instituto de Tecnologia Química e Biológica António Xavier, Universidade Nova de Lisboa, Av da República, 2780-157, Oeiras, Portugal
| | - Lígia O Martins
- Instituto de Tecnologia Química e Biológica António Xavier, Universidade Nova de Lisboa, Av da República, 2780-157, Oeiras, Portugal
| | - Clemens Peterbauer
- Institute of Food Technology, Department of Food Science and Technology, University of Natural Resources and Life Sciences, Vienna, Muthgasse 11, 1190, Vienna, Austria
| | - Chris Oostenbrink
- Institute for Molecular Modeling and Simulation, Department of Material Science and Life Sciences, University of Natural Resources and Life Sciences, Vienna, Muthgasse 18, 1190, Vienna, Austria
- Christian Doppler Laboratory for Molecular Informatics in the Biosciences, University of Natural Resources and Life Sciences, Vienna, Austria
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13
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Zhang K, Li J, Wang Z, Xie B, Xiong Z, Li H, Ahmed M, Fang F, Li J, Li X. Cloning, expression and application of a novel laccase derived from water buffalo ruminal lignin-degrading bacteria. Int J Biol Macromol 2024; 266:131109. [PMID: 38531520 DOI: 10.1016/j.ijbiomac.2024.131109] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2023] [Revised: 01/05/2024] [Accepted: 03/21/2024] [Indexed: 03/28/2024]
Abstract
Water buffalo is the only mammal found to degrade lignin so far, and laccase plays an indispensable role in the degradation of lignin. In this study, multiple laccase genes were amplified based on the water buffalo rumen derived lignin-degrading bacteria Bacillus cereus and Ochrobactrum pseudintermedium. Subsequently, the corresponding recombinant plasmids were transformed into E. coli expression system BL21 (DE3) for induced expression by Isopropyl-β-D-thiogalactopyranoside (IPTG). After preliminary screening, protein purification and enzyme activity assays, Lac3833 with soluble expression and high enzyme activity was selected to test its characteristics, especially the ability of lignin degradation. The results showed that the optimum reaction temperature of Lac3833 was 40 °C for different substrates. The relative activity of Lac3833 reached the highest at pH 4.5 and pH 5.5 when the substrates were ABTS or 2,6-DMP and guaiacol, respectively. Additionally, Lac3833 could maintain high enzyme activity in different temperatures, pH and solutions containing Na+, K+, Mg2+, Ca2+ and Mn2+. Importantly, compared to negative treatment, recombinant laccase Lac3833 treatment showed that it had a significant function in degrading lignin. In conclusion, this is a pioneering study to produce recombinant laccase with lignin-degrading ability by bacteria from water buffalo rumen, which will provide new insights for the exploitation of more lignin-degrading enzymes.
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Affiliation(s)
- Kun Zhang
- Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction, Ministry of Education, College of Animal Science and Technology, Huazhong Agricultural University, Wuhan, Hubei, China
| | - Jingfa Li
- Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction, Ministry of Education, College of Animal Science and Technology, Huazhong Agricultural University, Wuhan, Hubei, China
| | - Zhen Wang
- Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction, Ministry of Education, College of Animal Science and Technology, Huazhong Agricultural University, Wuhan, Hubei, China
| | - Bohan Xie
- Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction, Ministry of Education, College of Animal Science and Technology, Huazhong Agricultural University, Wuhan, Hubei, China
| | - Zixiang Xiong
- Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction, Ministry of Education, College of Animal Science and Technology, Huazhong Agricultural University, Wuhan, Hubei, China
| | - Hongyi Li
- Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction, Ministry of Education, College of Animal Science and Technology, Huazhong Agricultural University, Wuhan, Hubei, China
| | - Mehboob Ahmed
- Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction, Ministry of Education, College of Animal Science and Technology, Huazhong Agricultural University, Wuhan, Hubei, China
| | - Fang Fang
- Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction, Ministry of Education, College of Animal Science and Technology, Huazhong Agricultural University, Wuhan, Hubei, China
| | - Jiakui Li
- College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, Hubei, China.
| | - Xiang Li
- Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction, Ministry of Education, College of Animal Science and Technology, Huazhong Agricultural University, Wuhan, Hubei, China; Shennongjia Science and Technology Innovation Center, Huazhong Agricultural University, Shennongjia, China.
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14
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Wang P, Feng X, Lv Z, Liu J, Teng Q, Chen T, Liu Q. Temporal dynamics of lignin degradation in Quercus acutissima sawdust during Ganoderma lucidum cultivation. Int J Biol Macromol 2024; 268:131686. [PMID: 38643923 DOI: 10.1016/j.ijbiomac.2024.131686] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2023] [Revised: 04/07/2024] [Accepted: 04/17/2024] [Indexed: 04/23/2024]
Abstract
Despite a fair amount of lignin conversion during mycelial growth, previous structural analyses have not yet revealed how lignin changes continuously and what the relationship is between lignin and ligninolytic enzymes. To clarify these aspects, Quercus acutissima sawdust attaching Ganoderma lucidum mycelium collected from different growth stage was subjected to analysis of lignin structure and ligninolytic enzyme activity. Two key periods of lignin degradation are found during the cultivation of G. lucidum: hypha rapid growth period and primordium formation period. In the first stage, laccase activity is associated with the opening of structures such as methoxyls, β-O-4' substructures and guaiacyl units in lignin, as well as the shortening of lignin chains. Manganese peroxidases and lignin peroxidases are more suitable for degrading short chain lignin. The structure of phenylcoumarans and syringyl changes greatly in the second stage. The results from sawdust attaching mycelium provide new insights to help improve the cultivation substrate formulation of G. lucidum and understand biomass valorization better.
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Affiliation(s)
- Peng Wang
- Department of Vegetables, College of Horticulture, China Agricultural University, Beijing 100193, China
| | - Xiaobin Feng
- Cangzhou Academy of Agriculture and Forestry Sciences, Hebei 061000, China
| | - Ziwen Lv
- Beijing Key Laboratory of Lignocellulosic Chemistry, Beijing Forestry University, Beijing 100083, China
| | - Jia Liu
- Department of Vegetables, College of Horticulture, China Agricultural University, Beijing 100193, China
| | - Qian Teng
- Department of Vegetables, College of Horticulture, China Agricultural University, Beijing 100193, China
| | - Tong Chen
- Department of Vegetables, College of Horticulture, China Agricultural University, Beijing 100193, China
| | - Qinghong Liu
- Department of Vegetables, College of Horticulture, China Agricultural University, Beijing 100193, China.
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15
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Liu Y, Li T, Zhu H, Cao L, Liang L, Liu D, Shen Q. Methionine inducing carbohydrate esterase secretion of Trichoderma harzianum enhances the accessibility of substrate glycosidic bonds. Microb Cell Fact 2024; 23:120. [PMID: 38664812 PMCID: PMC11046756 DOI: 10.1186/s12934-024-02394-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2024] [Accepted: 04/16/2024] [Indexed: 04/28/2024] Open
Abstract
BACKGROUND The conversion of plant biomass into biochemicals is a promising way to alleviate energy shortage, which depends on efficient microbial saccharification and cellular metabolism. Trichoderma spp. have plentiful CAZymes systems that can utilize all-components of lignocellulose. Acetylation of polysaccharides causes nanostructure densification and hydrophobicity enhancement, which is an obstacle for glycoside hydrolases to hydrolyze glycosidic bonds. The improvement of deacetylation ability can effectively release the potential for polysaccharide degradation. RESULTS Ammonium sulfate addition facilitated the deacetylation of xylan by inducing the up-regulation of multiple carbohydrate esterases (CE3/CE4/CE15/CE16) of Trichoderma harzianum. Mainly, the pathway of ammonium-sulfate's cellular assimilates inducing up-regulation of the deacetylase gene (Thce3) was revealed. The intracellular metabolite changes were revealed through metabonomic analysis. Whole genome bisulfite sequencing identified a novel differentially methylated region (DMR) that existed in the ThgsfR2 promoter, and the DMR was closely related to lignocellulolytic response. ThGsfR2 was identified as a negative regulatory factor of Thce3, and methylation in ThgsfR2 promoter released the expression of Thce3. The up-regulation of CEs facilitated the substrate deacetylation. CONCLUSION Ammonium sulfate increased the polysaccharide deacetylation capacity by inducing the up-regulation of multiple carbohydrate esterases of T. harzianum, which removed the spatial barrier of the glycosidic bond and improved hydrophilicity, and ultimately increased the accessibility of glycosidic bond to glycoside hydrolases.
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Affiliation(s)
- Yang Liu
- Key Lab of Organic-Based Fertilizers of China and Jiangsu Provincial Key Lab for Solid Organic Waste Utilization, Nanjing Agricultural University, Nanjing, 210095, People's Republic of China
- College of Resource and Environmental Sciences, Nanjing Agricultural University, Nanjing, 210095, People's Republic of China
| | - Tuo Li
- Key Lab of Organic-Based Fertilizers of China and Jiangsu Provincial Key Lab for Solid Organic Waste Utilization, Nanjing Agricultural University, Nanjing, 210095, People's Republic of China
- College of Resource and Environmental Sciences, Nanjing Agricultural University, Nanjing, 210095, People's Republic of China
| | - Han Zhu
- Key Lab of Organic-Based Fertilizers of China and Jiangsu Provincial Key Lab for Solid Organic Waste Utilization, Nanjing Agricultural University, Nanjing, 210095, People's Republic of China
- College of Resource and Environmental Sciences, Nanjing Agricultural University, Nanjing, 210095, People's Republic of China
| | - Linhua Cao
- Key Lab of Organic-Based Fertilizers of China and Jiangsu Provincial Key Lab for Solid Organic Waste Utilization, Nanjing Agricultural University, Nanjing, 210095, People's Republic of China
- College of Resource and Environmental Sciences, Nanjing Agricultural University, Nanjing, 210095, People's Republic of China
| | - Lebin Liang
- Key Lab of Organic-Based Fertilizers of China and Jiangsu Provincial Key Lab for Solid Organic Waste Utilization, Nanjing Agricultural University, Nanjing, 210095, People's Republic of China
- College of Resource and Environmental Sciences, Nanjing Agricultural University, Nanjing, 210095, People's Republic of China
| | - Dongyang Liu
- Key Lab of Organic-Based Fertilizers of China and Jiangsu Provincial Key Lab for Solid Organic Waste Utilization, Nanjing Agricultural University, Nanjing, 210095, People's Republic of China.
- College of Resource and Environmental Sciences, Nanjing Agricultural University, Nanjing, 210095, People's Republic of China.
| | - Qirong Shen
- Key Lab of Organic-Based Fertilizers of China and Jiangsu Provincial Key Lab for Solid Organic Waste Utilization, Nanjing Agricultural University, Nanjing, 210095, People's Republic of China
- College of Resource and Environmental Sciences, Nanjing Agricultural University, Nanjing, 210095, People's Republic of China
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16
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Ferrari VB, Dos Santos Lima LM, de Matos Marques K, Gutierres FC, Guerini GG, Silveira MAV, de Figueiredo GM, Vital VG, Roswell MR, de Melo IS, Okamoto DN, de Vasconcellos SP. Caatinga, Amazon and Atlantic Forest as natural sources for microbial lignocellulolytic enzymes. Arch Microbiol 2024; 206:161. [PMID: 38483627 DOI: 10.1007/s00203-024-03883-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2023] [Revised: 01/19/2024] [Accepted: 02/02/2024] [Indexed: 03/19/2024]
Abstract
Brazilian biomes are important sources for environmental microorganisms, including efficient metabolic machineries, like actinomycetes. These bacteria are known for their abilities to produce many bioactive compounds, including enzymes with multiple industrial applications. The present work aimed to evaluate lignocellulolytic abilities of actinomycetes isolated from soil and rhizosphere samples collected at Caatinga, Atlantic and Amazon Forest. Laccase (Lac), lignin peroxidase (LiP), manganese peroxidase (MnP) and cellulase were evaluated for their efficiency. These enzymes have an essential role in lignin decomposition, through oxidation of phenolic and non-phenolic compounds, as well as enzymatic hydrolysis of vegetal biomass. In this sense, a total of 173 actinomycetes were investigated. Eleven (11) of them were selected by their enzymatic performance. The actinomycete AC166 displayed some activity in all analysed scenarios in terms of Lac, MnP and LiP activity, while AC171 was selected as the most promising strain, showing the following activities: 29.7 U.L-1 for Lac; 2.5 U.L-1 for LiP and 23 U.L-1 for MnP. Cellulolytic activities were evaluated at two pH conditions, 4.8 and 7.4, obtaining the following results: 25 U.L-1 and 71 U.L-1, respectively. Thermostability (4, 30 and 60 o C) and salinity concentrations (0 to 4 M) and pH variation (2.0 to 9.0) stabilities of the obtained LiP and Lac enzymatic extracts were also verified. The actinomycete strain AC171 displayed an adaptable response in distinct pH and salt profiles, indicating that bacterial LiP was some halophilic type. Additionally, the strain AC149 produced an alkali and extreme halophilic lignin peroxidase, which are promising profiles for their future application under lignocellulosic biomass at bioethanol biorefineries.
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Affiliation(s)
- Vitor Baptista Ferrari
- Department of Pharmaceutical Sciences, Universidade Federal de São Paulo (UNIFESP), Diadema, SP, Brazil
| | | | - Kelly de Matos Marques
- Department of Pharmaceutical Sciences, Universidade Federal de São Paulo (UNIFESP), Diadema, SP, Brazil
| | - Fernanda Camila Gutierres
- Department of Pharmaceutical Sciences, Universidade Federal de São Paulo (UNIFESP), Diadema, SP, Brazil
| | | | - Marghuel Aparecida Vieira Silveira
- Laboratory of Biochemistry and Enzymology, Institute of Pharmacology and Molecular Biology, Department of Biophysics, Escola Paulista de Medicina, Universidade Federal de São Paulo, São Paulo, Brazil
| | | | - Vitor Gonçalves Vital
- Department of Pharmaceutical Sciences, Universidade Federal de São Paulo (UNIFESP), Diadema, SP, Brazil
| | - Mariana Rocha Roswell
- Department of Pharmaceutical Sciences, Universidade Federal de São Paulo (UNIFESP), Diadema, SP, Brazil
| | - Itamar Soares de Melo
- Laboratory of Environmental Microbiology, Brazilian Agricultural Research Corporation, EMBRAPA Environment, Jaguariúna, SP, Brazil
| | - Debora Noma Okamoto
- Department of Pharmaceutical Sciences, Universidade Federal de São Paulo (UNIFESP), Diadema, SP, Brazil
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17
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Liu E, Mercado MIV, Segato F, Wilkins MR. A green pathway for lignin valorization: Enzymatic lignin depolymerization in biocompatible ionic liquids and deep eutectic solvents. Enzyme Microb Technol 2024; 174:110392. [PMID: 38171172 DOI: 10.1016/j.enzmictec.2023.110392] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2023] [Revised: 12/20/2023] [Accepted: 12/22/2023] [Indexed: 01/05/2024]
Abstract
Lignin depolymerization, which enables the breakdown of a complex and heterogeneous aromatic polymer into relatively uniform derivatives, serves as a critical process in valorization of lignin. Enzymatic lignin depolymerization has become a promising biological strategy to overcome the heterogeneity of lignin, due to its mild reaction conditions and high specificity. However, the low solubility of lignin compounds in aqueous environments prevents efficient lignin depolymerization by lignin-degrading enzymes. The employment of biocompatible ionic liquids (ILs) and deep eutectic solvents (DESs) in lignin fractionation has created a promising pathway to enzymatically depolymerize lignin within these green solvents to increase lignin solubility. In this review, recent research progress on enzymatic lignin depolymerization, particularly in a consolidated process involving ILs/DESs is summarized. In addition, the interactions between lignin-degrading enzymes and solvent systems are explored, and potential protein engineering methodology to improve the performance of lignin-degrading enzymes is discussed. Consolidation of enzymatic lignin depolymerization and biocompatible ILs/DESs paves a sustainable, efficient, and synergistic way to convert lignin into value-added products.
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Affiliation(s)
- Enshi Liu
- Department of Biological Systems Engineering, University of Nebraska-Lincoln, Lincoln, NE, USA
| | | | - Fernando Segato
- Department of Biotechnology, University of São Paulo, Lorena, SP, Brazil
| | - Mark R Wilkins
- Carl and Melinda Helwig Department of Biological and Agricultural Engineering, Kansas State University, Manhattan, KS, USA.
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18
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Mangini V, Rosini E, Caliandro R, Mangiatordi GF, Delre P, Sciancalepore AG, Pollegioni L, Haidukowski M, Mazzorana M, Sumarah MW, Renaud JB, Flaig R, Mulè G, Belviso BD, Loi M. DypB peroxidase for aflatoxin removal: New insights into the toxin degradation process. CHEMOSPHERE 2024; 349:140826. [PMID: 38040262 DOI: 10.1016/j.chemosphere.2023.140826] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/18/2023] [Revised: 11/24/2023] [Accepted: 11/26/2023] [Indexed: 12/03/2023]
Abstract
Aflatoxin B1 (AFB1) is one of the most potent carcinogens and a widespread food and feed contaminant. As for other toxins, many efforts are devoted to find efficient and environmentally-friendly methods to degrade AFB1, such as enzymatic treatments, thus improving the safety of food and feed products. In this regard, the dye decolorizing peroxidase of type B (DypB) can efficiently degrade AFB1. The molecular mechanism, which is required to drive protein optimization in view of the usage of DypB as a mycotoxin reduction agent in large scale application, is unknown. Here, we focused on the role of four DypB residues in the degradation of AFB1 by alanine-scanning (residues 156, 215, 239 and 246), which were identified from biochemical assays to be kinetically relevant for the degradation. As a result of DypB degradation, AFB1 is converted into four products. Interestingly, the relative abundancy of these products depends on the replaced residues. Molecular dynamics simulations were used to investigate the role of these residues in the binding step between protein and manganese, a metal ion which is expected to be involved in the degradation process. We found that the size of the haem pocket as well as conformational changes in the protein structure could play a role in determining the kinetics of AFB1 removal and, consequently, guide the process towards specific degradation products.
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Affiliation(s)
- V Mangini
- Istituto di Cristallografia, Consiglio Nazionale delle Ricerche, Via Amendola 122/o, Bari, 70126, Italy
| | - E Rosini
- Department of Biotechnology and Life Sciences, University of Insubria, Via J. H. Dunant 3, Varese, 21100, Italy
| | - R Caliandro
- Istituto di Cristallografia, Consiglio Nazionale delle Ricerche, Via Amendola 122/o, Bari, 70126, Italy
| | - G F Mangiatordi
- Istituto di Cristallografia, Consiglio Nazionale delle Ricerche, Via Amendola 122/o, Bari, 70126, Italy
| | - P Delre
- Istituto di Cristallografia, Consiglio Nazionale delle Ricerche, Via Amendola 122/o, Bari, 70126, Italy
| | - A G Sciancalepore
- Istituto di Cristallografia, Consiglio Nazionale delle Ricerche, Via Amendola 122/o, Bari, 70126, Italy
| | - L Pollegioni
- Department of Biotechnology and Life Sciences, University of Insubria, Via J. H. Dunant 3, Varese, 21100, Italy
| | - M Haidukowski
- Istituto di Scienze delle Produzioni Alimentari, Consiglio Nazionale delle Ricerche, Via Amendola 122/o, Bari, 70126, Italy
| | - M Mazzorana
- Diamond Light Source Ltd., Diamond House, Harwell Science & Innovation Campus, Didcot, OX11 0DE, UK; Research Complex at Harwell, Harwell Science and Innovation Campus, Didcot, OX11 0FA, UK
| | - M W Sumarah
- London Research and Development Centre, Agriculture and Agri-Food Canada, 1391 Sandford Street London, Ontario, Canada, N5V4T3
| | - J B Renaud
- London Research and Development Centre, Agriculture and Agri-Food Canada, 1391 Sandford Street London, Ontario, Canada, N5V4T3
| | - R Flaig
- Diamond Light Source Ltd., Diamond House, Harwell Science & Innovation Campus, Didcot, OX11 0DE, UK; Research Complex at Harwell, Harwell Science and Innovation Campus, Didcot, OX11 0FA, UK
| | - G Mulè
- Istituto di Scienze delle Produzioni Alimentari, Consiglio Nazionale delle Ricerche, Via Amendola 122/o, Bari, 70126, Italy.
| | - B D Belviso
- Istituto di Cristallografia, Consiglio Nazionale delle Ricerche, Via Amendola 122/o, Bari, 70126, Italy.
| | - M Loi
- Istituto di Scienze delle Produzioni Alimentari, Consiglio Nazionale delle Ricerche, Via Amendola 122/o, Bari, 70126, Italy
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19
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Xu L, Liaqat F, Sun J, Khazi MI, Xie R, Zhu D. Advances in the vanillin synthesis and biotransformation: A review. RENEWABLE AND SUSTAINABLE ENERGY REVIEWS 2024; 189:113905. [DOI: 10.1016/j.rser.2023.113905] [Citation(s) in RCA: 10] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/23/2024]
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20
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Sharker B, Islam MA, Hossain MAA, Ahmad I, Al Mamun A, Ghosh S, Rahman A, Hossain MS, Ashik MA, Hoque MR, Hossain MK, M Al Mamun, Haque MA, Patel H, Prodhan MY, Bhattacharya P, Haque MA. Characterization of lignin and hemicellulose degrading bacteria isolated from cow rumen and forest soil: Unveiling a novel enzymatic model for rice straw deconstruction. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 904:166704. [PMID: 37657552 DOI: 10.1016/j.scitotenv.2023.166704] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/10/2023] [Revised: 08/22/2023] [Accepted: 08/28/2023] [Indexed: 09/03/2023]
Abstract
Application of greener pretreatment technology using robust ligninolytic bacteria for short duration to deconstruct rice straw and enhance bioethanol production is currently lacking. The objective of this study is to characterize three bacterial strains isolated from the milieux of cow rumen and forest soil and explore their capabilities of breaking down lignocellulose - an essential process in bioethanol production. Using biochemical and genomic analyses these strains were identified as Bacillus sp. HSTU-bmb18, Bacillus sp. HSTU-bmb19, and Citrobacter sp. HSTU-bmb20. Genomic analysis of the strains unveiled validated model hemicellulases, multicopper oxidases, and pectate lyases. These enzymes exhibited interactions with distinct lignocellulose substrates, further affirmed by their stability in molecular dynamic simulations. A comprehensive expression of ligninolytic pathways, including β-ketoadipate, phenyl acetate, and benzoate, was observed within the HSTU-bmb20 genome. The strains secreted approximately 75-82 U/mL of cellulase, xylase, pectinase, and lignin peroxidase. FT-IR analysis of the bacterial treated rice straw fibers revealed that the intensity of lignin-related peaks decreased, while cellulose-related peaks sharpened. The values of crystallinity index for the untreated control and the treated rice straw with either HSTU-bmb18, or HSTU-bmb19, or HSTU-bmb20 were recorded to be 34.48, 28.49, 29.36, 31.75, respectively, which are much higher than that of 13.53 noted for those treated with the bacterial consortium. The ratio of fermentable cellulose in rice straw increased by 1.25-, 1.79-, 1.93- and 2.17-fold following treatments with HSTU-bmb18, HSTU-bmb20, HSTU-bmb19, and a mixed consortium of these three strains, respectively. These aggregative results suggested a novel model for rice straw deconstruction utilizing hydrolytic enzymes of the consortium, revealing superior efficacy compared to individual strains, and advancing cost-effective, affordable, and sustainable green technology.
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Affiliation(s)
- Bishal Sharker
- Department of Biochemistry and Molecular Biology, Hajee Mohammad Danesh Science and Technology University, Dinajpur, Bangladesh
| | - Md Aminul Islam
- Advanced Molecular Lab, Department of Microbiology, President Abdul Hamid Medical College, Karimganj-2310, Kishoreganj, Bangladesh; COVID-19 Diagnostic Lab, Department of Microbiology, Noakhali Science and Technology University, Noakhali 3814, Bangladesh
| | - Md Al Amin Hossain
- Department of Biochemistry and Molecular Biology, Hajee Mohammad Danesh Science and Technology University, Dinajpur, Bangladesh
| | - Iqrar Ahmad
- Department of Pharmaceutical Chemistry, Prof. Ravindra Nikam College of Pharmacy, Gondur, Dhule, 424002, India
| | - Abdullah Al Mamun
- Department of Biochemistry and Molecular Biology, Hajee Mohammad Danesh Science and Technology University, Dinajpur, Bangladesh
| | - Sibdas Ghosh
- Department of Biological Sciences, College of Arts and Sciences, Carlow University, 3333 Fifth Avenue, Pittsburgh, PA 15213, USA
| | - Aminur Rahman
- Department of Biomedical Sciences, College of Clinical Pharmacy, King Faisal University, Al-Ahsa 31982, Saudi Arabia
| | - Md Shohorab Hossain
- Department of Biochemistry and Molecular Biology, Hajee Mohammad Danesh Science and Technology University, Dinajpur, Bangladesh; Department of Biochemistry and Molecular Biology, Trust University, Barishal, Bangladesh
| | - Md Ashikujjaman Ashik
- Department of Biochemistry and Molecular Biology, Trust University, Barishal, Bangladesh
| | - Md Rayhanul Hoque
- Department of Soil Science, Hajee Mohammad Danesh Science and Technology University, Dinajpur 5200, Bangladesh
| | - Md Khalid Hossain
- Institute of Electronics, Atomic Energy Research Establishment, Bangladesh Atomic Energy Commission, Dhaka 1349, Bangladesh
| | - M Al Mamun
- Materials Science Division, Atomic Energy Centre Dhaka, Bangladesh Atomic Energy Commission, Dhaka 1000, Bangladesh
| | - Md Atiqul Haque
- Department of Microbiology, Hajee Mohammad Danesh Science and Technology University, Dinajpur, Bangladesh; Key Lab of Animal Epidemiology and Zoonoses of Ministry of Agriculture and Rural Affairs, College of Veterinary Medicine, China Agricultural University, Beijing, China
| | - Harun Patel
- Division of Computer Aided Drug Design, Department of Pharmaceutical Chemistry, R. C. Patel Institute of Pharmaceutical Education and Research, Shirpur, 425405, Maharashtra, India
| | - Md Yeasin Prodhan
- Department of Biochemistry and Molecular Biology, Hajee Mohammad Danesh Science and Technology University, Dinajpur, Bangladesh
| | - Prosun Bhattacharya
- COVID-19 Research, Department of Sustainable Development, Environmental Science and Engineering, KTH Royal Institute of Technology, Teknikringen 10B, SE 10044 Stockholm, Sweden.
| | - Md Azizul Haque
- Department of Biochemistry and Molecular Biology, Hajee Mohammad Danesh Science and Technology University, Dinajpur, Bangladesh.
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Laconi EB, Jayanegara A, Astuti DA, Fitriana EL, Nabawi SNL, Alifian MD. Evaluation of rations containing bioconverted cacao pod as fiber source for small ruminant. Trop Anim Health Prod 2023; 55:422. [PMID: 38012359 DOI: 10.1007/s11250-023-03843-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2022] [Accepted: 11/21/2023] [Indexed: 11/29/2023]
Abstract
This study aimed to evaluate the potential use of bioconverted cacao pod (BCP) as a substitute for forage in the total mixed ration (TMR) for a small ruminant. In the in vitro experiment, the control TMR (30% forage and 70% concentrate) was substituted with two different levels of BCP (15% and 30%) and two different types of BCP ( BCP-pc and BCP-tv). Based on the in vitro evaluation, the best ration was then chosen for the in vivo experiment, in which male goats were fed a control TMR, the TMR containing 15% BCP-pc (RC), and TMR containing 15% bioconverted palm kernel meal (RP). The results showed that TMRs with 15% BCP-pc and BCP-tv substitution had significantly lower gas production and digestibility than the control ration. However, the TMR with 15% or 30% BCP substitution showed no significant difference in rumen fermentation characteristics, methane production, and total protozoa. In the in vivo experiment, the RC showed no significant difference in all nutrient intakes, the average daily gain of animals, feed conversion ratio value, and crude fiber digestibility but reduced dry and organic matter digestibility. In comparison, the RP resulted in reduced parameters. Therefore, the study concluded that BCP-pc at a level of 15% could be used as a substitute for forage in TMR for male goats without compromising the fermentability of rumen, nutrient intakes, and their average daily gain and feed conversion ratio. Overall, this study suggests the potential of BCP-pc as an alternative feed ingredient.
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Affiliation(s)
- Erika Budiarti Laconi
- Department of Nutrition and Feed Technology, Faculty of Animal Science, IPB University, Jl. Agatis, Kampus IPB Darmaga, Bogor, 16680, Indonesia.
| | - Anuraga Jayanegara
- Department of Nutrition and Feed Technology, Faculty of Animal Science, IPB University, Jl. Agatis, Kampus IPB Darmaga, Bogor, 16680, Indonesia
| | - Dewi Apri Astuti
- Department of Nutrition and Feed Technology, Faculty of Animal Science, IPB University, Jl. Agatis, Kampus IPB Darmaga, Bogor, 16680, Indonesia
| | - Eko Lela Fitriana
- Graduate Study Program of Nutrition and Feed Science, IPB University, Jl. Agatis, Kampus IPB Darmaga, Bogor, 16680, Indonesia
| | - Soviro Nurul Lisa Nabawi
- Graduate Study Program of Nutrition and Feed Science, IPB University, Jl. Agatis, Kampus IPB Darmaga, Bogor, 16680, Indonesia
| | - Mochamad Dzaky Alifian
- Graduate Study Program of Nutrition and Feed Science, IPB University, Jl. Agatis, Kampus IPB Darmaga, Bogor, 16680, Indonesia
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22
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Zhang T, Wei S, Liu Y, Cheng C, Ma J, Yue L, Gao Y, Cheng Y, Ren Y, Su S, Zhao X, Lu Z. Screening and genome-wide analysis of lignocellulose-degrading bacteria from humic soil. Front Microbiol 2023; 14:1167293. [PMID: 37637133 PMCID: PMC10450921 DOI: 10.3389/fmicb.2023.1167293] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2023] [Accepted: 07/25/2023] [Indexed: 08/29/2023] Open
Abstract
Crop straw contains huge amounts of exploitable energy, and efficient biomass degradation measures have attracted worldwide attention. Mining strains with high yields of cellulose-degrading enzymes is of great significance for developing clean energy and industrial production of related enzymes. In this study, we reported a high-quality genome sequence of Bacillus velezensis SSF6 strain using high-throughput sequencing technology (Illumina PE150 and PacBio) and assessed its lignocellulose degradation potential. The results demonstrated that the genome of B. velezensis SSF6 was 3.89 Mb and contained 4,015 genes, of which 2,972, 3,831 and 158 genes were annotated in the COGs (Clusters of Orthologous Groups), KEGG (Kyoto Encyclopedia of Genes and Genomes) and CAZyme (Carbohydrate-Active enZymes) databases, respectively, and contained a large number of genes related to carbohydrate metabolism. Furthermore, B. velezensis SSF6 has a high cellulose degradation capacity, with a filter paper assay (FPA) and an exoglucanase activity of 64.48 ± 0.28 and 78.59 ± 0.42 U/mL, respectively. Comparative genomic analysis depicted that B. velezensis SSF6 was richer in carbohydrate hydrolase gene. In conclusion, the cellulose-degrading ability of B. velezensis SSF6 was revealed by genome sequencing and the determination of cellulase activity, which laid a foundation for further cellulose degradation and bioconversion.
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Affiliation(s)
- Tianjiao Zhang
- School of Life Science, Inner Mongolia University, Hohhot, China
- Inner Mongolia Academy of Agriculture and Husbandry Science, Hohhot, China
- Key Laboratory of Black Soil Protection And Utilization (Hohhot), Ministry of Agriculture and Rural Affairs, Hohhot, China
- Inner Mongolia Key Laboratory of Degradation Farmland Ecological Restoration and Pollution Control, Hohhot, China
| | - Shuli Wei
- School of Life Science, Inner Mongolia University, Hohhot, China
- Inner Mongolia Academy of Agriculture and Husbandry Science, Hohhot, China
- Key Laboratory of Black Soil Protection And Utilization (Hohhot), Ministry of Agriculture and Rural Affairs, Hohhot, China
- Inner Mongolia Key Laboratory of Degradation Farmland Ecological Restoration and Pollution Control, Hohhot, China
| | - Yajie Liu
- School of Life Science, Inner Mongolia University, Hohhot, China
- Inner Mongolia Academy of Agriculture and Husbandry Science, Hohhot, China
- Key Laboratory of Black Soil Protection And Utilization (Hohhot), Ministry of Agriculture and Rural Affairs, Hohhot, China
- Inner Mongolia Key Laboratory of Degradation Farmland Ecological Restoration and Pollution Control, Hohhot, China
| | - Chao Cheng
- School of Life Science, Jining Normal University, Ulanqab, China
| | - Jie Ma
- School of Life Science, Inner Mongolia University, Hohhot, China
- Inner Mongolia Academy of Agriculture and Husbandry Science, Hohhot, China
- Key Laboratory of Black Soil Protection And Utilization (Hohhot), Ministry of Agriculture and Rural Affairs, Hohhot, China
- Inner Mongolia Key Laboratory of Degradation Farmland Ecological Restoration and Pollution Control, Hohhot, China
| | - Linfang Yue
- Inner Mongolia Academy of Agriculture and Husbandry Science, Hohhot, China
| | - Yanrong Gao
- School of Life Science, Inner Mongolia University, Hohhot, China
- Inner Mongolia Academy of Agriculture and Husbandry Science, Hohhot, China
- Key Laboratory of Black Soil Protection And Utilization (Hohhot), Ministry of Agriculture and Rural Affairs, Hohhot, China
- Inner Mongolia Key Laboratory of Degradation Farmland Ecological Restoration and Pollution Control, Hohhot, China
| | - Yuchen Cheng
- Inner Mongolia Academy of Agriculture and Husbandry Science, Hohhot, China
- Key Laboratory of Black Soil Protection And Utilization (Hohhot), Ministry of Agriculture and Rural Affairs, Hohhot, China
- Inner Mongolia Key Laboratory of Degradation Farmland Ecological Restoration and Pollution Control, Hohhot, China
| | - Yongfeng Ren
- Inner Mongolia Academy of Agriculture and Husbandry Science, Hohhot, China
- Key Laboratory of Black Soil Protection And Utilization (Hohhot), Ministry of Agriculture and Rural Affairs, Hohhot, China
- Inner Mongolia Key Laboratory of Degradation Farmland Ecological Restoration and Pollution Control, Hohhot, China
| | - Shaofeng Su
- School of Life Science, Inner Mongolia University, Hohhot, China
- Inner Mongolia Academy of Agriculture and Husbandry Science, Hohhot, China
- Key Laboratory of Black Soil Protection And Utilization (Hohhot), Ministry of Agriculture and Rural Affairs, Hohhot, China
- Inner Mongolia Key Laboratory of Degradation Farmland Ecological Restoration and Pollution Control, Hohhot, China
| | - Xiaoqing Zhao
- School of Life Science, Inner Mongolia University, Hohhot, China
- Inner Mongolia Academy of Agriculture and Husbandry Science, Hohhot, China
- Key Laboratory of Black Soil Protection And Utilization (Hohhot), Ministry of Agriculture and Rural Affairs, Hohhot, China
- Inner Mongolia Key Laboratory of Degradation Farmland Ecological Restoration and Pollution Control, Hohhot, China
| | - Zhanyuan Lu
- School of Life Science, Inner Mongolia University, Hohhot, China
- Inner Mongolia Academy of Agriculture and Husbandry Science, Hohhot, China
- Key Laboratory of Black Soil Protection And Utilization (Hohhot), Ministry of Agriculture and Rural Affairs, Hohhot, China
- Inner Mongolia Key Laboratory of Degradation Farmland Ecological Restoration and Pollution Control, Hohhot, China
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23
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Peng Z, Jiang X, Si C, Joao Cárdenas-Oscanoa A, Huang C. Advances of Modified Lignin as Substitute to Develop Lignin-Based Phenol-Formaldehyde Resin Adhesives. CHEMSUSCHEM 2023; 16:e202300174. [PMID: 37338272 DOI: 10.1002/cssc.202300174] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/06/2023] [Revised: 04/06/2023] [Indexed: 06/21/2023]
Abstract
Traditionally, phenols used to prepare phenol-formaldehyde (PF) resin adhesives are obtained from phenolic compounds and various chemicals, which are extracted from petroleum-based raw materials. Lignin, a sustainable phenolic macromolecule in the cell wall of biomass with an aromatic ring and a phenolic hydroxyl group similar to those of phenol, can be an ideal substitute for phenol in PF resin adhesives. However, only a few lignin-based adhesives are produced on a large scale in industry, mainly because of the low activity of lignin. Preparing lignin-based PF resin adhesives with exceptional achievements by modifying lignin instead of phenol is an efficient method to improve the economic benefits and protect the environment. In this review, the latest progress in the preparation of PF resin adhesives via lignin modification, including chemical, physical, and biological modifications, is discussed. In addition, the advantages and disadvantages of different lignin modification methods for adhesives are compared and discussed, and future research directions for the synthesis of lignin-based PF resin adhesives are proposed.
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Affiliation(s)
- Zhenwen Peng
- Co-Innovation Center for Efficient Processing and Utilization of Forest Resources, College of Chemical Engineering, Nanjing Forestry University, Nanjing, 210037, P. R. China
| | - Xiao Jiang
- Department of Forestry Biomaterials, North Carolina State University Campus Box 8005, Raleigh, NC 27695-8005, USA
| | - Chuanling Si
- Co-Innovation Center for Efficient Processing and Utilization of Forest Resources, College of Chemical Engineering, Nanjing Forestry University, Nanjing, 210037, P. R. China
- Tianjin Key Laboratory of Pulp and Paper, Tianjin University of Science and Technology, Tianjin, 300457, P. R. China
| | - Aldo Joao Cárdenas-Oscanoa
- Forest Industry Department, Faculty of Forest Science, Universidad Nacional Agraria La Molina, Lima, 15024, Perú
| | - Caoxing Huang
- Co-Innovation Center for Efficient Processing and Utilization of Forest Resources, College of Chemical Engineering, Nanjing Forestry University, Nanjing, 210037, P. R. China
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Singh AK, Iqbal HMN, Cardullo N, Muccilli V, Fern'andez-Lucas J, Schmidt JE, Jesionowski T, Bilal M. Structural insights, biocatalytic characteristics, and application prospects of lignin-modifying enzymes for sustainable biotechnology-A review. Int J Biol Macromol 2023:124968. [PMID: 37217044 DOI: 10.1016/j.ijbiomac.2023.124968] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2023] [Revised: 04/22/2023] [Accepted: 05/17/2023] [Indexed: 05/24/2023]
Abstract
Lignin modifying enzymes (LMEs) have gained widespread recognition in depolymerization of lignin polymers by oxidative cleavage. LMEs are a robust class of biocatalysts that include lignin peroxidase (LiP), manganese peroxidase (MnP), versatile peroxidase (VP), laccase (LAC), and dye-decolorizing peroxidase (DyP). Members of the LMEs family act on phenolic, non-phenolic substrates and have been widely researched for valorization of lignin, oxidative cleavage of xenobiotics and phenolics. LMEs implementation in the biotechnological and industrial sectors has sparked significant attention, although its potential future applications remain underexploited. To understand the mechanism of LMEs in sustainable pollution mitigation, several studies have been undertaken to assess the feasibility of LMEs in correlating to diverse pollutants for binding and intermolecular interactions at the molecular level. However, further investigation is required to fully comprehend the underlying mechanism. In this review we presented the key structural and functional features of LMEs, including the computational aspects, as well as the advanced applications in biotechnology and industrial research. Furthermore, concluding remarks and a look ahead, the use of LMEs coupled with computational frameworks, built upon artificial intelligence (AI) and machine learning (ML), has been emphasized as a recent milestone in environmental research.
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Affiliation(s)
- Anil Kumar Singh
- Environmental Microbiology Laboratory, Environmental Toxicology Group CSIR-Indian Institute of Toxicology Research (CSIR-IITR), Vishvigyan Bhawan, 31, Mahatma Gandhi Marg, Lucknow 226001, Uttar Pradesh, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Hafiz M N Iqbal
- Tecnologico de Monterrey, School of Engineering and Sciences, Monterrey 64849, Mexico
| | - Nunzio Cardullo
- Dipartimento di Scienze Chimiche, Università degli Studi di Catania, V.le A. Doria 6, 95125 Catania, Italy
| | - Vera Muccilli
- Dipartimento di Scienze Chimiche, Università degli Studi di Catania, V.le A. Doria 6, 95125 Catania, Italy
| | - Jesús Fern'andez-Lucas
- Applied Biotechnology Group, Universidad Europea de Madrid, Urbanizaci'on El Bosque, 28670 Villaviciosa de Od'on, Spain; Grupo de Investigaci'on en Ciencias Naturales y Exactas, GICNEX, Universidad de la Costa, CUC, Calle 58 # 55-66, 080002 Barranquilla, Colombia
| | - Jens Ejbye Schmidt
- Department of Chemical Engineering, Biotechnology and Environmental Technology, University of Southern Denmark, Odense, Denmark
| | - Teofil Jesionowski
- Institute of Chemical Technology and Engineering, Faculty of Chemical Technology, Poznan University of Technology, Berdychowo 4, PL-60965 Poznan, Poland
| | - Muhammad Bilal
- Institute of Chemical Technology and Engineering, Faculty of Chemical Technology, Poznan University of Technology, Berdychowo 4, PL-60965 Poznan, Poland.
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25
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Ansari SA, Shakeel A, Sawarkar R, Maddalwar S, Khan D, Singh L. Additive facilitated co-composting of lignocellulosic biomass waste, approach towards minimizing greenhouse gas emissions: An up to date review. ENVIRONMENTAL RESEARCH 2023; 224:115529. [PMID: 36822534 DOI: 10.1016/j.envres.2023.115529] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/21/2022] [Revised: 02/15/2023] [Accepted: 02/18/2023] [Indexed: 06/18/2023]
Abstract
Although the composting of lignocellulosic biomass is an emerging waste-to-wealth approach towards organic waste management and circular economy, it still has some environmental loopholes that must be addressed to make it more sustainable and reliable. The significant difficulties encountered when composting lignocellulosic waste biomass are consequently discussed in this study, as well as the advances in science that have been achieved throughout time to handle these problems in a sustainable manner. It discusses an important global concern, the emission of greenhouse gases during the composting process which limits its applicability on a broader scale. Furthermore, it discusses in detail, how different organic minerals and biological additives modify the physiochemical and biological characteristics of compost, aiming at developing eco-friendly compost with minimum odor, greenhouse gases emission and an optimum C/N ratio. It brings novel insights by demonstrating the effect of additives on the microbial enzymes and their pathways involved in the degradation of lignocellulosic biomass. This review also highlights the limitations of the application of additives in composting and suggests possible ways to overcome these limitations in the future for the sustainable and eco-friendly management of agricultural waste. The present review concludes that the use of additives in the co-composting of lignocellulosic biomass can be a viable remedy for the ongoing issues with the management of lignocellulosic waste.
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Affiliation(s)
- Suhel Aneesh Ansari
- Environmental Biotechnology and Genomics Division, CSIR NEERI, Nagpur, India.
| | - Adnan Shakeel
- Environmental Biotechnology and Genomics Division, CSIR NEERI, Nagpur, India.
| | - Riya Sawarkar
- Environmental Biotechnology and Genomics Division, CSIR NEERI, Nagpur, India.
| | - Shrirang Maddalwar
- Environmental Biotechnology and Genomics Division, CSIR NEERI, Nagpur, India.
| | - Debishree Khan
- Environmental Biotechnology and Genomics Division, CSIR NEERI, Nagpur, India.
| | - Lal Singh
- Environmental Biotechnology and Genomics Division, CSIR NEERI, Nagpur, India.
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26
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Rodriguez-Yupanqui M, De La Cruz-Noriega M, Quiñones C, Otiniano NM, Quezada-Alvarez MA, Rojas-Villacorta W, Vergara-Medina GA, León-Vargas FR, Solís-Muñoz H, Rojas-Flores S. Lignin-Degrading Bacteria in Paper Mill Sludge. Microorganisms 2023; 11:1168. [PMID: 37317142 DOI: 10.3390/microorganisms11051168] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2023] [Revised: 03/30/2023] [Accepted: 04/19/2023] [Indexed: 06/16/2023] Open
Abstract
The effluents generated in the paper industry, such as black liquor, have a high content of lignin and other toxic components; however, they represent a source of lignin-degrading bacteria with biotechnological potential. Therefore, the present study aimed to isolate and identify lignin-degrading bacteria species in paper mill sludge. A primary isolation was carried out from samples of sludge present in environments around a paper company located in the province of Ascope (Peru). Bacteria selection was made by the degradation of Lignin Kraft as the only carbon source in a solid medium. Finally, the laccase activity (Um-L-1) of each selected bacteria was determined by oxidation of 2,2'-azinobis-(3-etilbencenotiazolina-6-sulfonate) (ABTS). Bacterial species with laccase activity were identified by molecular biology techniques. Seven species of bacteria with laccase activity and the ability to degrade lignin were identified. The bacteria Agrobacterium tumefasciens (2), Klebsiella grimontii (1), and Beijeinckia fluminensis (1) were reported for first time. K. grimowntii and B. fluminensis presented the highest laccase activity, with values of 0.319 ± 0.005 UmL-1 and 0.329 ± 0.004 UmL-1, respectively. In conclusion, paper mill sludge may represent a source of lignin-degrading bacteria with laccase activity, and they could have potential biotechnological applications.
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Affiliation(s)
- Magda Rodriguez-Yupanqui
- Escuela de Ingeniería Ambiental, Facultad de Ingeniería y Arquitectura, Universidad Cesar Vallejo, Trujillo 13007, Peru
| | | | - Claudio Quiñones
- Laboratorio de Biotecnología e Ingeniería Genética, Departamento de Microbiología y Parasitología, Universidad Nacional de Trujillo, Trujillo 13011, Peru
| | - Nélida Milly Otiniano
- Instituto de Investigación en Ciencia y Tecnología, Universidad César Vallejo, Trujillo 13001, Peru
| | | | | | - Gino A Vergara-Medina
- Facultad de Ingeniería Civil y Ambiental, Universidad Nacional Toribio Rodríguez de Mendoza de Amazonas, Chachapoyas 01001, Peru
| | - Frank R León-Vargas
- Departamento de Ingeniería Química, Facultad de Ingeniería Química, Universidad Nacional de la Amazonia Peruana, Iquitos 16002, Peru
| | - Haniel Solís-Muñoz
- Escuela de Ingeniería Industrial, Facultad de Ingeniería, Universidad Cesar Vallejo, Trujillo 13007, Peru
| | - Segundo Rojas-Flores
- Vicerrectorado de Investigación, Universidad Autónoma del Perú, Lima 15842, Peru
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27
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Gye H, Baek H, Han S, Kwon H, Nguyen TVT, Pham LTM, Kang S, Nho YH, Lee DW, Kim YH. Recombinant Lignin Peroxidase with Superior Thermal Stability and Melanin Decolorization Efficiency in a Typical Human Skin-Mimicking Environment. Biomacromolecules 2023. [PMID: 37075205 DOI: 10.1021/acs.biomac.3c00123] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/21/2023]
Abstract
Recently, the desire for a safe and effective method for skin whitening has been growing in the cosmetics industry. Commonly used tyrosinase-inhibiting chemical reagents exhibit side effects. Thus, recent studies have focused on performing melanin decolorization with enzymes as an alternative due to the low toxicity of enzymes and their ability to decolorize melanin selectively. Herein, 10 different isozymes were expressed as recombinant lignin peroxidases (LiPs) from Phanerochaete chrysosporium (PcLiPs), and PcLiP isozyme 4 (PcLiP04) was selected due to its high stability and activity at pH 5.5 and 37 °C, which is close to human skin conditions. In vitro melanin decolorization results indicated that PcLiP04 exhibited at least 2.9-fold higher efficiency than that of well-known lignin peroxidase (PcLiP01) in a typical human skin-mimicking environment. The interaction force between melanin films measured by a surface forces apparatus (SFA) revealed that the decolorization of melanin by PcLiP04 harbors a disrupted structure, possibly interrupting π-π stacking and/or hydrogen bonds. In addition, a 3D reconstructed human pigmented epidermis skin model showed a decrease in melanin area to 59.8% using PcLiP04, which suggests that PcLiP04 exhibits a strong potential for skin whitening.
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Affiliation(s)
- Hyeryeong Gye
- School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST), 50, UNIST-gil, Ulsan 44919, Republic of Korea
| | - Heeyeon Baek
- School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST), 50, UNIST-gil, Ulsan 44919, Republic of Korea
| | - Seunghyun Han
- School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST), 50, UNIST-gil, Ulsan 44919, Republic of Korea
| | - Haeun Kwon
- School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST), 50, UNIST-gil, Ulsan 44919, Republic of Korea
| | - Trang Vu Thien Nguyen
- School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST), 50, UNIST-gil, Ulsan 44919, Republic of Korea
| | - Le Thanh Mai Pham
- School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST), 50, UNIST-gil, Ulsan 44919, Republic of Korea
| | - Seunghyun Kang
- Bio Technology Lab, COSMAX BTI R&I Center, Seongnam 13486, Republic of Korea
| | - Youn Hwa Nho
- Bio Technology Lab, COSMAX BTI R&I Center, Seongnam 13486, Republic of Korea
| | - Dong Woog Lee
- School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST), 50, UNIST-gil, Ulsan 44919, Republic of Korea
| | - Yong Hwan Kim
- School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST), 50, UNIST-gil, Ulsan 44919, Republic of Korea
- Graduate School of Carbon Neutrality, Ulsan National Institute of Science and Technology (UNIST), 50, UNIST-gil, Ulsan 44919, Republic of Korea
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28
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Hemalatha P, Abda EM, Shah S, Venkatesa Prabhu S, Jayakumar M, Karmegam N, Kim W, Govarthanan M. Multi-faceted CRISPR-Cas9 strategy to reduce plant based food loss and waste for sustainable bio-economy - A review. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2023; 332:117382. [PMID: 36753844 DOI: 10.1016/j.jenvman.2023.117382] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/09/2022] [Revised: 01/14/2023] [Accepted: 01/25/2023] [Indexed: 06/18/2023]
Abstract
Currently, international development requires innovative solutions to address imminent challenges like climate change, unsustainable food system, food waste, energy crisis, and environmental degradation. All the same, addressing these concerns with conventional technologies is time-consuming, causes harmful environmental impacts, and is not cost-effective. Thus, biotechnological tools become imperative for enhancing food and energy resilience through eco-friendly bio-based products by valorisation of plant and food waste to meet the goals of circular bioeconomy in conjunction with Sustainable Developmental Goals (SDGs). Genome editing can be accomplished using a revolutionary DNA modification tool, CRISPR-Cas9, through its uncomplicated guided mechanism, with great efficiency in various organisms targeting different traits. This review's main objective is to examine how the CRISPR-Cas system, which has positive features, could improve the bioeconomy by reducing food loss and waste with all-inclusive food supply chain both at on-farm and off-farm level; utilising food loss and waste by genome edited microorganisms through food valorisation; efficient microbial conversion of low-cost substrates as biofuel; valorisation of agro-industrial wastes; mitigating greenhouse gas emissions through forestry plantation crops; and protecting the ecosystem and environment. Finally, the ethical implications and regulatory issues that are related to CRISPR-Cas edited products in the international markets have also been taken into consideration.
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Affiliation(s)
- Palanivel Hemalatha
- Department of Biotechnology, Center of Excellence for Biotechnology and Bioprocess, College of Biological and Chemical Engineering, Addis Ababa Science and Technology University, PO Box 16417, Addis Ababa, Ethiopia
| | - Ebrahim M Abda
- Department of Biotechnology, Center of Excellence for Biotechnology and Bioprocess, College of Biological and Chemical Engineering, Addis Ababa Science and Technology University, PO Box 16417, Addis Ababa, Ethiopia
| | - Shipra Shah
- Department of Forestry, College of Agriculture, Fisheries and Forestry, Fiji National University, Kings Road, Koronivia, P. O. Box 1544, Nausori, Republic of Fiji
| | - S Venkatesa Prabhu
- Department of Chemical Engineering, Center of Excellence for Biotechnology and Bioprocess, College of Biological and Chemical Engineering, Addis Ababa Science and Technology University, PO Box 16417, Addis Ababa, Ethiopia
| | - M Jayakumar
- Department of Chemical Engineering, Haramaya Institute of Technology, Haramaya University, P.O. Box 138, Dire Dawa, Ethiopia.
| | - N Karmegam
- PG and Research Department of Botany, Government Arts College (Autonomous), Salem, 636 007, Tamil Nadu, India
| | - Woong Kim
- Department of Environmental Engineering, Kyungpook National University, Daegu, 41566, Republic of Korea
| | - M Govarthanan
- Department of Environmental Engineering, Kyungpook National University, Daegu, 41566, Republic of Korea; Department of Biomaterials, Saveetha Dental College and Hospital, Saveetha Institute of Medical and Technical Sciences, Chennai, 600 077, India.
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Lankiewicz TS, Choudhary H, Gao Y, Amer B, Lillington SP, Leggieri PA, Brown JL, Swift CL, Lipzen A, Na H, Amirebrahimi M, Theodorou MK, Baidoo EEK, Barry K, Grigoriev IV, Timokhin VI, Gladden J, Singh S, Mortimer JC, Ralph J, Simmons BA, Singer SW, O'Malley MA. Lignin deconstruction by anaerobic fungi. Nat Microbiol 2023; 8:596-610. [PMID: 36894634 PMCID: PMC10066034 DOI: 10.1038/s41564-023-01336-8] [Citation(s) in RCA: 12] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2022] [Accepted: 01/31/2023] [Indexed: 03/11/2023]
Abstract
Lignocellulose forms plant cell walls, and its three constituent polymers, cellulose, hemicellulose and lignin, represent the largest renewable organic carbon pool in the terrestrial biosphere. Insights into biological lignocellulose deconstruction inform understandings of global carbon sequestration dynamics and provide inspiration for biotechnologies seeking to address the current climate crisis by producing renewable chemicals from plant biomass. Organisms in diverse environments disassemble lignocellulose, and carbohydrate degradation processes are well defined, but biological lignin deconstruction is described only in aerobic systems. It is currently unclear whether anaerobic lignin deconstruction is impossible because of biochemical constraints or, alternatively, has not yet been measured. We applied whole cell-wall nuclear magnetic resonance, gel-permeation chromatography and transcriptome sequencing to interrogate the apparent paradox that anaerobic fungi (Neocallimastigomycetes), well-documented lignocellulose degradation specialists, are unable to modify lignin. We find that Neocallimastigomycetes anaerobically break chemical bonds in grass and hardwood lignins, and we further associate upregulated gene products with the observed lignocellulose deconstruction. These findings alter perceptions of lignin deconstruction by anaerobes and provide opportunities to advance decarbonization biotechnologies that depend on depolymerizing lignocellulose.
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Affiliation(s)
- Thomas S Lankiewicz
- Department of Chemical Engineering, University of California Santa Barbara, Santa Barbara, CA, USA
- Department of Ecology, Evolution, and Marine Biology, University of California Santa Barbara, Santa Barbara, CA, USA
- Joint BioEnergy Institute, Emeryville, CA, USA
| | - Hemant Choudhary
- Joint BioEnergy Institute, Emeryville, CA, USA
- Department of Biomaterials and Biomanufacturing, Sandia National Laboratories, Livermore, CA, USA
| | - Yu Gao
- Joint BioEnergy Institute, Emeryville, CA, USA
- Environmental Genomics and Systems Biology Division, Lawrence Berkeley National Laboratory, Berkeley, CA, USA
| | - Bashar Amer
- Joint BioEnergy Institute, Emeryville, CA, USA
| | - Stephen P Lillington
- Department of Chemical Engineering, University of California Santa Barbara, Santa Barbara, CA, USA
| | - Patrick A Leggieri
- Department of Chemical Engineering, University of California Santa Barbara, Santa Barbara, CA, USA
| | - Jennifer L Brown
- Department of Chemical Engineering, University of California Santa Barbara, Santa Barbara, CA, USA
| | - Candice L Swift
- Department of Chemical Engineering, University of California Santa Barbara, Santa Barbara, CA, USA
- Department of Environmental Health Sciences, University of South Carolina, Columbia, SC, USA
| | - Anna Lipzen
- Department of Energy Joint Genome Institute, Lawrence Berkeley National Laboratory, Berkeley, CA, USA
| | - Hyunsoo Na
- Department of Energy Joint Genome Institute, Lawrence Berkeley National Laboratory, Berkeley, CA, USA
| | - Mojgan Amirebrahimi
- Department of Energy Joint Genome Institute, Lawrence Berkeley National Laboratory, Berkeley, CA, USA
| | - Michael K Theodorou
- Department of Agriculture and Environment, Harper Adams University, Newport, UK
| | - Edward E K Baidoo
- Joint BioEnergy Institute, Emeryville, CA, USA
- Biological Systems and Engineering Division, Lawrence Berkeley National Laboratory, Berkeley, CA, USA
| | - Kerrie Barry
- Department of Energy Joint Genome Institute, Lawrence Berkeley National Laboratory, Berkeley, CA, USA
| | - Igor V Grigoriev
- Environmental Genomics and Systems Biology Division, Lawrence Berkeley National Laboratory, Berkeley, CA, USA
- Department of Energy Joint Genome Institute, Lawrence Berkeley National Laboratory, Berkeley, CA, USA
- Department of Plant and Microbial Biology, University of California Berkeley, Berkeley, CA, USA
| | | | - John Gladden
- Joint BioEnergy Institute, Emeryville, CA, USA
- Department of Biomaterials and Biomanufacturing, Sandia National Laboratories, Livermore, CA, USA
| | - Seema Singh
- Joint BioEnergy Institute, Emeryville, CA, USA
- Department of Biomaterials and Biomanufacturing, Sandia National Laboratories, Livermore, CA, USA
| | - Jenny C Mortimer
- Joint BioEnergy Institute, Emeryville, CA, USA
- Environmental Genomics and Systems Biology Division, Lawrence Berkeley National Laboratory, Berkeley, CA, USA
- School of Agriculture, Food and Wine, Waite Research Institute, University of Adelaide, Glen Osmond, South Australia, Australia
| | - John Ralph
- Great Lakes Bioenergy Research Center, Madison, WI, USA
- Department of Biochemistry, University of Wisconsin Madison, Madison, WI, USA
| | - Blake A Simmons
- Joint BioEnergy Institute, Emeryville, CA, USA
- Biological Systems and Engineering Division, Lawrence Berkeley National Laboratory, Berkeley, CA, USA
| | - Steven W Singer
- Joint BioEnergy Institute, Emeryville, CA, USA
- Biological Systems and Engineering Division, Lawrence Berkeley National Laboratory, Berkeley, CA, USA
| | - Michelle A O'Malley
- Department of Chemical Engineering, University of California Santa Barbara, Santa Barbara, CA, USA.
- Joint BioEnergy Institute, Emeryville, CA, USA.
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Wang X, Lei Z, Zhang Z, Shimizu K, Lee DJ, Khanal SK. Use of nanobubble water bioaugmented anaerobically digested sludge for high-efficacy energy production from high-solids anaerobic digestion of corn straw. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 863:160825. [PMID: 36502974 DOI: 10.1016/j.scitotenv.2022.160825] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/19/2022] [Revised: 11/21/2022] [Accepted: 12/06/2022] [Indexed: 06/17/2023]
Abstract
An increasing attention has been paid to the secure and sustainable management of agricultural wastes, especially lignocellulosic biomass. Nanobubble water (NBW) contains 106-108 bubbles/mL with diameter <1000 nm. Although previous studies have examined the enhancement effects of NBW on methane production from organic solid wastes, the NBW-based anaerobic digestion (AD) system is still restrained from practical application due to the large increase in AD reactor volume, generation of wastewater, and increase in energy consumption as well. In this study, NBW bioaugmentation of anaerobically digested sludge for the first time was performed for high-solids AD of corn straw. Results show that cellulase, xylanases and lignin peroxidase activities were increased by 2-55% during the NBW bioaugmentation process. Significant enrichment of hydrolytic/acidogenic bacteria and methanogenic archaea were noticed in the NBW bioaugmented sludge. This study clearly demonstrated 47% increase in methane production from high-solids AD of corn straw when O2-NBW bioaugmented sludge was applied, achieving a net energy gain of 5138 MJ/t-volatile solids of corn straw with an energy recovery of 34%. The NBW-based high-solids AD system can provide a novel and sustainable management solution for renewable energy production from agricultural wastes, targeting the reduction of environmental pollution and energy crisis.
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Affiliation(s)
- Xuezhi Wang
- Graduate School of Life and Environmental Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8572, Japan; School of Resource and Environment, Anhui Agricultural University, Hefei 230036, China
| | - Zhongfang Lei
- Faculty of Life and Environmental Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8572, Japan.
| | - Zhenya Zhang
- Faculty of Life and Environmental Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8572, Japan
| | - Kazuya Shimizu
- Faculty of Life and Environmental Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8572, Japan; Faculty of Life Sciences, Toyo University, 1-1-1 Izumino, Oura-gun, Itakura, Gunma 374-0193, Japan
| | - Duu-Jong Lee
- Department of Mechanical Engineering, City University of Hong Kong, Kowloon Tang, Hong Kong
| | - Samir Kumar Khanal
- Department of Molecular Biosciences and Bioengineering, University of Hawai'i at Manoa, 1955 East-West Road, Honolulu, HI 96822, USA
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31
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Lignin modification by anaerobes revealed. Nat Microbiol 2023; 8:567-568. [PMID: 36899108 DOI: 10.1038/s41564-023-01343-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/12/2023]
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32
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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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Chen J, Hao X, Chi Y, Ma L. Metabolic regulation mechanism of Trametes gibbosa CB_1 on lignin. Int J Biol Macromol 2023; 240:124189. [PMID: 36990410 DOI: 10.1016/j.ijbiomac.2023.124189] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2023] [Revised: 03/07/2023] [Accepted: 03/22/2023] [Indexed: 03/29/2023]
Abstract
White rot fungi can degrade lignin and play a significant role in the recycling of carbon resources for environmental protection. Trametes gibbosa is the main white rot fungus in Northeast China. The main acids produced by T. gibbosa degradation, include long-chain fatty acids, lactic acid, succinic acid, and some small molecular compounds for example benzaldehyde. A variety of proteins respond to lignin stress and play an important role in xenobiotics metabolism, metal ion transport, and redox. Coordinated regulation and detoxification activation of H2O2 produced in oxidative stress by peroxidase coenzyme system and Fenton reaction. The Dioxygenase cleavage pathway and β-ketoadipic acid pathway are the main oxidation pathways of lignin degradation, which mediate the entry of "COA" into the TCA cycle. In the joint action of hydrolase and coenzyme, cellulose, hemicellulose, and other polysaccharides are degraded and finally converted to glucose to participate in energy metabolism. The expression of the laccase (Lcc_1) protein was verified by E. coli. Also, the Lcc_1 overexpression mutant was established. The morphology of mycelium was dense and the lignin degradation rate was improved. We completed the first non-directional mutation of in T. gibbosa. It also improved the mechanism of T. gibbosa in response to lignin stress.
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Chellappan BV, El-Ganainy SM, Alrajeh HS, Al-Sheikh H. In Silico Characterization of the Secretome of the Fungal Pathogen Thielaviopsis punctulata, the Causal Agent of Date Palm Black Scorch Disease. J Fungi (Basel) 2023; 9:jof9030303. [PMID: 36983471 PMCID: PMC10051545 DOI: 10.3390/jof9030303] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2023] [Revised: 02/23/2023] [Accepted: 02/24/2023] [Indexed: 03/03/2023] Open
Abstract
The black scorch disease of date palm caused by Thielaviopsis punctulata is a serious threat to the cultivation and productivity of date palm in Arabian Peninsula. The virulence factors that contribute to pathogenicity of T. punctulata have not been identified yet. In the present study, using bioinformatics approach, secretory proteins of T. punctulata were identified and functionally characterized. A total of 197 putative secretory proteins were identified, of which 74 were identified as enzymes for carbohydrate degradation (CAZymes), 25 were proteases, and 47 were predicted as putative effectors. Within the CAZymes, 50 cell wall-degrading enzymes, potentially to degrade cell wall components such as cellulose, hemicellulose, lignin, and pectin, were identified. Of the 47 putative effectors, 34 possessed at least one functional domain. The secretome of T. punctulata was compared to the predicted secretome of five closely related species (T. musarum, T. ethacetica, T. euricoi, T. cerberus, and T. populi) and identified species specific CAZymes and putative effector genes in T. punctulata, providing a valuable resource for the research aimed at understanding the molecular mechanism underlying the pathogenicity of T. punctulata on Date palm.
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Affiliation(s)
- Biju Vadakkemukadiyil Chellappan
- Department of Biological Sciences, College of Science, King Faisal University, P.O. Box 420, Al-Ahsa 31982, Saudi Arabia
- Correspondence:
| | - Sherif Mohamed El-Ganainy
- Department of Arid Land Agriculture, College of Agriculture and Food Sciences, King Faisal University, P.O. Box 420, Al-Ahsa 31982, Saudi Arabia
- Agricultural Research Center, Plant Pathology Research Institute, Giza 12619, Egypt
| | - Hind Salih Alrajeh
- Department of Biological Sciences, College of Science, King Faisal University, P.O. Box 420, Al-Ahsa 31982, Saudi Arabia
| | - Hashem Al-Sheikh
- Department of Biological Sciences, College of Science, King Faisal University, P.O. Box 420, Al-Ahsa 31982, Saudi Arabia
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Bisaccia M, Binda E, Rosini E, Caruso G, Dell'Acqua O, Azzaro M, Laganà P, Tedeschi G, Maffioli EM, Pollegioni L, Marinelli F. A novel promising laccase from the psychrotolerant and halotolerant Antarctic marine Halomonas sp. M68 strain. Front Microbiol 2023; 14:1078382. [PMID: 36846806 PMCID: PMC9950745 DOI: 10.3389/fmicb.2023.1078382] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2022] [Accepted: 01/04/2023] [Indexed: 02/12/2023] Open
Abstract
Microbial communities inhabiting the Antarctic Ocean show psychrophilic and halophilic adaptations conferring interesting properties to the enzymes they produce, which could be exploited in biotechnology and bioremediation processes. Use of cold- and salt-tolerant enzymes allows to limit costs, reduce contaminations, and minimize pretreatment steps. Here, we report on the screening of 186 morphologically diverse microorganisms isolated from marine biofilms and water samples collected in Terra Nova Bay (Ross Sea, Antarctica) for the identification of new laccase activities. After primary screening, 13.4 and 10.8% of the isolates were identified for the ability to oxidize 2,2'-azino-bis (3-ethylbenzothiazoline-6-sulfonic acid) (ABTS) and the dye azure B, respectively. Amongst them, the marine Halomonas sp. strain M68 showed the highest activity. Production of its laccase-like activity increased six-fold when copper was added to culture medium. Enzymatic activity-guided separation coupled with mass spectrometry identified this intracellular laccase-like protein (named Ant laccase) as belonging to the copper resistance system multicopper oxidase family. Ant laccase oxidized ABTS and 2,6-dimethoxy phenol, working better at acidic pHs The enzyme showed a good thermostability, with optimal temperature in the 40-50°C range and maintaining more than 40% of its maximal activity even at 10°C. Furthermore, Ant laccase was salt- and organic solvent-tolerant, paving the way for its use in harsh conditions. To our knowledge, this is the first report concerning the characterization of a thermo- and halo-tolerant laccase isolated from a marine Antarctic bacterium.
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Affiliation(s)
- Melissa Bisaccia
- Department of Biotechnology and Life Sciences (DBSV), University of Insubria, Varese, Italy,*Correspondence: Melissa Bisaccia,
| | - Elisa Binda
- Department of Biotechnology and Life Sciences (DBSV), University of Insubria, Varese, Italy
| | - Elena Rosini
- Department of Biotechnology and Life Sciences (DBSV), University of Insubria, Varese, Italy
| | - Gabriella Caruso
- Institute of Polar Sciences (CNR-ISP), National Research Council, Messina, Italy
| | - Ombretta Dell'Acqua
- Institute of Polar Sciences (CNR-ISP), National Research Council, Venice, Italy
| | - Maurizio Azzaro
- Institute of Polar Sciences (CNR-ISP), National Research Council, Messina, Italy
| | - Pasqualina Laganà
- Department of Biomedical and Dental Sciences and Morphofunctional Imaging (BIOMORF), University of Messina, Messina, Italy
| | - Gabriella Tedeschi
- Department of Veterinary Medicine and Animal Science (DIVAS), University of Milan, Milan, Italy,Cimaina, University of Milan, Milan, Italy
| | - Elisa M. Maffioli
- Department of Veterinary Medicine and Animal Science (DIVAS), University of Milan, Milan, Italy,Cimaina, University of Milan, Milan, Italy
| | - Loredano Pollegioni
- Department of Biotechnology and Life Sciences (DBSV), University of Insubria, Varese, Italy
| | - Flavia Marinelli
- Department of Biotechnology and Life Sciences (DBSV), University of Insubria, Varese, Italy
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Liu X, Lyu L, Li J, Sen B, Bai M, Stajich JE, Collier JL, Wang G. Comparative Genomic Analyses of Cellulolytic Machinery Reveal Two Nutritional Strategies of Marine Labyrinthulomycetes Protists. Microbiol Spectr 2023; 11:e0424722. [PMID: 36744882 PMCID: PMC10101102 DOI: 10.1128/spectrum.04247-22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2022] [Accepted: 01/11/2023] [Indexed: 02/07/2023] Open
Abstract
Labyrinthulomycetes are a group of ubiquitous and diverse unicellular Stramenopiles and have long been known for their vital role in ocean carbon cycling. However, their ecological function from the perspective of organic matter degradation remains poorly understood. This study reports high-quality genomes of two newly isolated Labyrinthulomycetes strains, namely, Botryochytrium sp. strain S-28 and Oblongichytrium sp. strain S-429, and provides molecular analysis of their ecological functions using comparative genomics and a biochemical assay. Our results suggest that Labyrinthulomycetes may occupy multiple ecological niches in marine ecosystems because of the significant differences in gene function among different genera. Certain strains could degrade wheat bran independently by secreting cellulase. The key glycoside hydrolase families (GH1, GH5, and GH9) related to cellulase and the functional domains of carbohydrate-active enzymes (CAZymes) were more enriched in their genomes. This group can actively participate in marine biochemical cycles as decomposers. In contrast, other strains that could not produce cellulase may thrive as "leftover scavengers" and act as a source of nutrients to the higher-trophic-level plankton. In addition, our findings emphasize the dual roles of endoglucanase, acting as both exo- and endoglucanases, in the process of cellulose degradation. Using genomic, biochemical, and phylogenetic analyses, our study provides a broader insight into the nutritional patterns and ecological functions of Labyrinthulomycetes. IMPORTANCE Unicellular heterotrophic eukaryotes are an important component of marine ecosystems. However, their ecological functions and modes of nutrition remain largely unknown. Our current understanding of marine microbial ecology is incomplete without integrating these heterotrophic microeukaryotes into the food web models. This study focuses on the unicellular fungus-like protists Labyrinthulomycetes and provides two high-quality genomes of cellulase-producing Labyrinthulomycetes. Our study uncovers the basis of their cellulase production by deciphering the results of genomic, biochemical, and phylogenetic analyses. This study instigates a further investigation of the molecular mechanism of organic matter utilization by Labyrinthulomycetes in the world's oceans.
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Affiliation(s)
- Xiuping Liu
- Center for Marine Environmental Ecology, School of Environmental Science and Engineering, Tianjin University, Tianjin, China
| | - Lu Lyu
- Center for Marine Environmental Ecology, School of Environmental Science and Engineering, Tianjin University, Tianjin, China
| | - Jiaqian Li
- Center for Marine Environmental Ecology, School of Environmental Science and Engineering, Tianjin University, Tianjin, China
| | - Biswarup Sen
- Center for Marine Environmental Ecology, School of Environmental Science and Engineering, Tianjin University, Tianjin, China
| | - Mohan Bai
- Center for Marine Environmental Ecology, School of Environmental Science and Engineering, Tianjin University, Tianjin, China
| | - Jason E. Stajich
- Department of Plant Pathology and Microbiology, University of California, Riverside, California, USA
| | - Jackie L. Collier
- School of Marine and Atmospheric Sciences, Stony Brook University, Stony Brook, New York, USA
| | - Guangyi Wang
- Center for Marine Environmental Ecology, School of Environmental Science and Engineering, Tianjin University, Tianjin, China
- Frontiers Science Center for Synthetic Biology, Tianjin University, Tianjin, China
- Key Laboratory of Systems Bioengineering (MOE), Tianjin University, Tianjin, China
- Center for Biosafety Research and Strategy, Tianjin University, Tianjin, China
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Chen J, Ye Y, Chi Y, Hao X, Zhao Q. Transcriptomics and co-expression network analysis revealing candidate genes for the laccase activity of Trametes gibbosa. BMC Microbiol 2023; 23:29. [PMID: 36703110 PMCID: PMC9878871 DOI: 10.1186/s12866-022-02727-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2022] [Accepted: 12/08/2022] [Indexed: 01/27/2023] Open
Abstract
BACKGROUND Trametes gibbosa, which is a white-rot fungus of the Polyporaceae family found in the cold temperate zone, causes spongy white rot on wood. Laccase can oxidize benzene homologs and is one of the important oxidases for white rot fungi to degrade wood. However, the pathway of laccase synthesis in white rot fungi is unknown. RESULTS The peak value of laccase activity reached 135.75 U/min/L on the 9th day. For laccase activity and RNA-seq data, gene expression was segmented into 24 modules. Turquoise and blue modules had greater associations with laccase activity (positively 0.94 and negatively -0.86, respectively). For biology function, these genes were concentrated on the cell cycle, citrate cycle, nicotinate, and nicotinamide metabolism, succinate dehydrogenase activity, flavin adenine dinucleotide binding, and oxidoreductase activity which are highly related to the laccase synthetic pathway. Among them, gene_8826 (MW199767), gene_7458 (MW199766), gene_61 (MW199765), gene_1741 (MH257605), and gene_11087 (MK805159) were identified as central genes. CONCLUSION Laccase activity steadily increased in wood degradation. Laccase oxidation consumes oxygen to produce hydrogen ions and water during the degradation of wood. Some of the hydrogen ions produced can be combined by Flavin adenine dinucleotide (FAD) to form reduced Flavin dinucleotide (FADH2), which can be transmitted. Also, the fungus was starved of oxygen throughout fermentation, and the NADH and FADH2 are unable to transfer hydrogen under hypoxia, resulting in the inability of NAD and FAD to regenerate and inhibit the tricarboxylic acid cycle of cells. These key hub genes related to laccase activity play important roles in the molecular mechanisms of laccase synthesis for exploring industrial excellent strains.
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Affiliation(s)
- Jie Chen
- grid.412246.70000 0004 1789 9091Northeast Forestry University, Harbin, China ,grid.4818.50000 0001 0791 5666Wageningen University & Research, Wageningen, Netherlands
| | - Yi Ye
- grid.412246.70000 0004 1789 9091Northeast Forestry University, Harbin, China
| | - Yujie Chi
- grid.412246.70000 0004 1789 9091Northeast Forestry University, Harbin, China
| | - Xin Hao
- grid.412246.70000 0004 1789 9091Northeast Forestry University, Harbin, China
| | - Qingquan Zhao
- grid.412246.70000 0004 1789 9091Northeast Forestry University, Harbin, China
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Virginia LJ, Peterbauer C. Localization of Pyranose 2-Oxidase from Kitasatospora aureofaciens: A Step Closer to Elucidate a Biological Role. Int J Mol Sci 2023; 24:ijms24031975. [PMID: 36768294 PMCID: PMC9916811 DOI: 10.3390/ijms24031975] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2022] [Revised: 01/11/2023] [Accepted: 01/16/2023] [Indexed: 01/20/2023] Open
Abstract
Lignin degradation in fungal systems is well characterized. Recently, a potential for lignin depolymerization and modification employing similar enzymatic activities by bacteria is increasingly recognized. The presence of genes annotated as peroxidases in Actinobacteria genomes suggests that these bacteria should contain auxiliary enzymes such as flavin-dependent carbohydrate oxidoreductases. The only auxiliary activity subfamily with significantly similar representatives in bacteria is pyranose oxidase (POx). A biological role of providing H2O2 for peroxidase activation and reduction of radical degradation products suggests an extracellular localization, which has not been established. Analysis of the genomic locus of POX from Kitasatospora aureofaciens (KaPOx), which is similar to fungal POx, revealed a start codon upstream of the originally annotated one, and the additional sequence was considered a putative Tat-signal peptide by computational analysis. We expressed KaPOx including this additional upstream sequence as well as fusion constructs consisting of the additional sequence, the KaPOx mature domain and the fluorescent protein mRFP1 in Streptomyces lividans. The putative signal peptide facilitated secretion of KaPOx and the fusion protein, suggesting a natural extracellular localization and supporting a potential role in providing H2O2 and reducing radical compounds derived from lignin degradation.
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Affiliation(s)
- Ludovika Jessica Virginia
- Food Biotechnology Laboratory, Department of Food Science and Technology, BOKU—University of Natural Resources and Life Sciences, Muthgasse 11, 1190 Vienna, Austria
- Doctoral Programme BioToP—Biomolecular Technology of Proteins, BOKU—University of Natural Resources and Life Sciences, Muthgasse 11, 1190 Vienna, Austria
| | - Clemens Peterbauer
- Food Biotechnology Laboratory, Department of Food Science and Technology, BOKU—University of Natural Resources and Life Sciences, Muthgasse 11, 1190 Vienna, Austria
- Doctoral Programme BioToP—Biomolecular Technology of Proteins, BOKU—University of Natural Resources and Life Sciences, Muthgasse 11, 1190 Vienna, Austria
- Correspondence: ; Tel.: +43-1-47654-75212
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He Z, Ding B, Ali Q, Liu H, Zhao Y, Wang X, Han Y, Dong H, Divvela PK, Juan Y. Screening and isolation of cold-adapted cellulose degrading bacterium: A candidate for straw degradation and De novo genome sequencing analysis. Front Microbiol 2023; 13:1098723. [PMID: 36713214 PMCID: PMC9880256 DOI: 10.3389/fmicb.2022.1098723] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2022] [Accepted: 12/19/2022] [Indexed: 01/14/2023] Open
Abstract
Degradation of crop straw in natural environment has been a bottleneck. There has been a recent increase in the exploration of cold-adapted microorganisms as they can solve the problem of corn straw degradation under low temperatures and offer new alternatives for the sustainable development of agriculture. The study was conducted in low-temperature (10°C) and high-efficiency cellulose-degrading bacteria were screened using carboxymethyl cellulose (CMC) selection medium and subjected to genome sequencing by the third-generation Pacbio Sequl and the second-generation Illumina Novaseq platform, and their cellulase activity was detected by 3,5-dinitrosalicylic acid (DNS) method. The results showed that the low-temperature (10°C) and high-efficiency cellulose-degrading bacterium Bacillus subtilis K1 was 4,060,823 bp in genome size, containing 4,213 genes, with 3,665, 3,656, 2,755, 3,240, 1,261, 3,336 and 4,003 genes annotated in the non-redundant protein sequence database (NR), Pfam, clusters of orthologous groups of proteins (COGs), Genome Ontology (GO), Kyoto Encyclopedia of Genes and Genomes (KEGG), and Annotation databases, respectively. In addition, a large number of lignocellulose degradation-related genes were annotated in the genome. The cellulose activity of B. subtilis K1 was higher, exhibiting the highest activity of endo-β-glucanase (24.69 U/ml), exo-β-glucanase (1.72 U/ml) and β-glucosaccharase (1.14 U/ml). It was found that through adding cold-adapted cellulose-degrading bacteriaK1 in the corn straw composting under 6°C (ambient temperature), the average temperature of straw composting was 58.7°C, and higher 86.7% as compared to control. The HA/FA was higher 94.02% than the control and the lignocellulose degradation rate was lower 18.01-41.39% than the control. The results provide a theoretical basis for clarifying the degradation potential of cold-adapted cellulose-degrading bacteria and improving the cellulose degradation efficiency.
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Affiliation(s)
- Zhigang He
- Institute of Plant Nutrition and Environmental Resources, Liaoning Academy of Agricultural Sciences, Shenyang, China
| | - Baopeng Ding
- College of Forestry, Shanxi Agricultural University, Taigu, Shanxi, China
| | - Qurban Ali
- Key Laboratory of Integrated Management of Crop Diseases and Pests, Ministry of Education, Department of Plant Pathology, College of Plant Protection, Nanjing Agricultural University, Nanjing, China
| | - Huiyu Liu
- Institute of Plant Nutrition and Environmental Resources, Liaoning Academy of Agricultural Sciences, Shenyang, China
| | - Ying Zhao
- Institute of Plant Nutrition and Environmental Resources, Liaoning Academy of Agricultural Sciences, Shenyang, China
| | - Xiujuan Wang
- Institute of Plant Nutrition and Environmental Resources, Liaoning Academy of Agricultural Sciences, Shenyang, China
| | - Yingzuo Han
- Institute of Plant Nutrition and Environmental Resources, Liaoning Academy of Agricultural Sciences, Shenyang, China
| | - Huan Dong
- Institute of Plant Nutrition and Environmental Resources, Liaoning Academy of Agricultural Sciences, Shenyang, China
| | | | - Yinghua Juan
- Institute of Plant Nutrition and Environmental Resources, Liaoning Academy of Agricultural Sciences, Shenyang, China
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Vilela N, Tomazetto G, Gonçalves TA, Sodré V, Persinoti GF, Moraes EC, de Oliveira AHC, da Silva SN, Fill TP, Damasio A, Squina FM. Integrative omics analyses of the ligninolytic Rhodosporidium fluviale LM-2 disclose catabolic pathways for biobased chemical production. BIOTECHNOLOGY FOR BIOFUELS AND BIOPRODUCTS 2023; 16:5. [PMID: 36624471 PMCID: PMC9830802 DOI: 10.1186/s13068-022-02251-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/15/2022] [Accepted: 12/18/2022] [Indexed: 01/11/2023]
Abstract
BACKGROUND Lignin is an attractive alternative for producing biobased chemicals. It is the second major component of the plant cell wall and is an abundant natural source of aromatic compounds. Lignin degradation using microbial oxidative enzymes that depolymerize lignin and catabolize aromatic compounds into central metabolic intermediates is a promising strategy for lignin valorization. However, the intrinsic heterogeneity and recalcitrance of lignin severely hinder its biocatalytic conversion. In this context, examining microbial degradation systems can provide a fundamental understanding of the pathways and enzymes that are useful for lignin conversion into biotechnologically relevant compounds. RESULTS Lignin-degrading catabolism of a novel Rhodosporidium fluviale strain LM-2 was characterized using multi-omic strategies. This strain was previously isolated from a ligninolytic microbial consortium and presents a set of enzymes related to lignin depolymerization and aromatic compound catabolism. Furthermore, two catabolic routes for producing 4-vinyl guaiacol and vanillin were identified in R. fluviale LM-2. CONCLUSIONS The multi-omic analysis of R. fluviale LM-2, the first for this species, elucidated a repertoire of genes, transcripts, and secreted proteins involved in lignin degradation. This study expands the understanding of ligninolytic metabolism in a non-conventional yeast, which has the potential for future genetic manipulation. Moreover, this work unveiled critical pathways and enzymes that can be exported to other systems, including model organisms, for lignin valorization.
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Affiliation(s)
- Nathália Vilela
- grid.442238.b0000 0001 1882 0259Programa de Processos Tecnológicos e Ambientais, University of Sorocaba (UNISO), Sorocaba, Brazil ,grid.411087.b0000 0001 0723 2494Department of Biochemistry and Tissue Biology, Institute of Biology, University of Campinas (UNICAMP), Campinas, Brazil
| | - Geizecler Tomazetto
- grid.7048.b0000 0001 1956 2722Department of Biological and Chemical Engineering (BCE), Aarhus University, 8200 Aarhus, Denmark
| | - Thiago Augusto Gonçalves
- grid.4989.c0000 0001 2348 0746Photobiocatalysis Unit—CPBL, and Biomass Transformation Lab—BTL, École Interfacultaire de Bioingénieurs, Université Libre de Bruxelles, Brussels, Belgium
| | - Victoria Sodré
- grid.7372.10000 0000 8809 1613Department of Chemistry, University of Warwick, Coventry, UK
| | - Gabriela Felix Persinoti
- grid.452567.70000 0004 0445 0877Brazilian Biorenewables National Laboratory (LNBR), Brazilian Center for Research in Energy and Materials (CNPEM), Campinas, Brazil
| | - Eduardo Cruz Moraes
- grid.411087.b0000 0001 0723 2494Department of Biochemistry and Tissue Biology, Institute of Biology, University of Campinas (UNICAMP), Campinas, Brazil
| | - Arthur Henrique Cavalcante de Oliveira
- grid.11899.380000 0004 1937 0722Department of Chemistry, Faculty of Philosophy Sciences and Letters of Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP Brazil
| | - Stephanie Nemesio da Silva
- grid.411087.b0000 0001 0723 2494Laboratory of Biology Chemical Microbial (LaBioQuiMi), Institute of Chemistry, University of Campinas (UNICAMP), Campinas, Brazil
| | - Taícia Pacheco Fill
- grid.411087.b0000 0001 0723 2494Laboratory of Biology Chemical Microbial (LaBioQuiMi), Institute of Chemistry, University of Campinas (UNICAMP), Campinas, Brazil
| | - André Damasio
- grid.411087.b0000 0001 0723 2494Department of Biochemistry and Tissue Biology, Institute of Biology, University of Campinas (UNICAMP), Campinas, Brazil
| | - Fabio Marcio Squina
- grid.442238.b0000 0001 1882 0259Programa de Processos Tecnológicos e Ambientais, University of Sorocaba (UNISO), Sorocaba, Brazil
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Benatti ALT, Polizeli MDLTDM. Lignocellulolytic Biocatalysts: The Main Players Involved in Multiple Biotechnological Processes for Biomass Valorization. Microorganisms 2023; 11:microorganisms11010162. [PMID: 36677454 PMCID: PMC9864444 DOI: 10.3390/microorganisms11010162] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2022] [Revised: 12/11/2022] [Accepted: 12/26/2022] [Indexed: 01/10/2023] Open
Abstract
Human population growth, industrialization, and globalization have caused several pressures on the planet's natural resources, culminating in the severe climate and environmental crisis which we are facing. Aiming to remedy and mitigate the impact of human activities on the environment, the use of lignocellulolytic enzymes for biofuel production, food, bioremediation, and other various industries, is presented as a more sustainable alternative. These enzymes are characterized as a group of enzymes capable of breaking down lignocellulosic biomass into its different monomer units, making it accessible for bioconversion into various products and applications in the most diverse industries. Among all the organisms that produce lignocellulolytic enzymes, microorganisms are seen as the primary sources for obtaining them. Therefore, this review proposes to discuss the fundamental aspects of the enzymes forming lignocellulolytic systems and the main microorganisms used to obtain them. In addition, different possible industrial applications for these enzymes will be discussed, as well as information about their production modes and considerations about recent advances and future perspectives in research in pursuit of expanding lignocellulolytic enzyme uses at an industrial scale.
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Iqbal MM, Nishimura M, Haider MN, Yoshizawa S. Microbial communities on eelgrass ( Zostera marina) thriving in Tokyo Bay and the possible source of leaf-attached microbes. Front Microbiol 2023; 13:1102013. [PMID: 36687565 PMCID: PMC9853538 DOI: 10.3389/fmicb.2022.1102013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2022] [Accepted: 12/15/2022] [Indexed: 01/07/2023] Open
Abstract
Zostera marina (eelgrass) is classified as one of the marine angiosperms and is widely distributed throughout much of the Northern Hemisphere. The present study investigated the microbial community structure and diversity of Z. marina growing in Futtsu bathing water, Chiba prefecture, Japan. The purpose of this study was to provide new insight into the colonization of eelgrass leaves by microbial communities based on leaf age and to compare these communities to the root-rhizome of Z. marina, and the surrounding microenvironments (suspended particles, seawater, and sediment). The microbial composition of each sample was analyzed using 16S ribosomal gene amplicon sequencing. Each sample type was found to have a unique microbial community structure. Leaf-attached microbes changed in their composition depending on the relative age of the eelgrass leaf. Special attention was given to a potential microbial source of leaf-attached microbes. Microbial communities of marine particles looked more like those of eelgrass leaves than those of water samples. This finding suggests that leaf-attached microbes were derived from suspended particles, which could allow them to go back and forth between eelgrass leaves and the water column.
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Affiliation(s)
- Md Mehedi Iqbal
- Atmosphere and Ocean Research Institute, The University of Tokyo, Kashiwa, Chiba, Japan,Department of Natural Environmental Studies, Graduate School of Frontier Sciences, The University of Tokyo, Kashiwa, Chiba, Japan,*Correspondence: Md Mehedi Iqbal,
| | - Masahiko Nishimura
- Atmosphere and Ocean Research Institute, The University of Tokyo, Kashiwa, Chiba, Japan
| | - Md. Nurul Haider
- Faculty of Fisheries, Bangladesh Agricultural University, Mymensingh, Bangladesh
| | - Susumu Yoshizawa
- Atmosphere and Ocean Research Institute, The University of Tokyo, Kashiwa, Chiba, Japan,Department of Natural Environmental Studies, Graduate School of Frontier Sciences, The University of Tokyo, Kashiwa, Chiba, Japan,Susumu Yoshizawa,
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Gruninger RJ, Tsang A, McAllister TA. Isolation and Preparation of Extracellular Proteins from Lignocellulose-Degrading Fungi for Comparative Proteomic Studies Using Mass Spectrometry. Methods Mol Biol 2023; 2657:305-313. [PMID: 37149539 DOI: 10.1007/978-1-0716-3151-5_21] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
Fungi utilize a unique mechanism of nutrient acquisition involving extracellular digestion. To understand the biology of these microbes, it is important to identify and characterize the function of proteins that are secreted and involved in nutrient acquisition. Mass spectrometry-based proteomics is a powerful tool to study complex mixtures of proteins and understand how the proteins produced by an organism change in response to different conditions. Many fungi are efficient decomposers of plant cell walls, and anaerobic fungi are well recognized for their ability to digest lignocellulose. Here we outline a protocol for the enrichment and isolation of proteins secreted by anaerobic fungi after growth on simple (glucose) and complex (straw and alfalfa hay) carbon sources. We provide detailed instruction on generating protein fragments and preparing these for proteomic analysis using reversed-phase chromatography and mass spectrometry. The interpretation of results and their relevance to a particular biological system is study-dependent and beyond the scope of this protocol.
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Affiliation(s)
- Robert J Gruninger
- Lethbridge Research and Development Centre, Agriculture and Agri-Food Canada, Lethbridge, AB, Canada.
| | - Adrian Tsang
- Centre for Structural and Functional Genomics, Concordia University, QC, Canada
| | - Tim A McAllister
- Lethbridge Research and Development Centre, Agriculture and Agri-Food Canada, Lethbridge, AB, Canada
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Gruninger RJ, Tsang A, McAllister TA. Identification of Genes Involved in the Degradation of Lignocellulose Using Comparative Transcriptomics. Methods Mol Biol 2023; 2657:285-304. [PMID: 37149538 DOI: 10.1007/978-1-0716-3151-5_20] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
Lignocellulosic biomass represents an abundant, renewable resource that can be used to produce biofuels, low-cost livestock feed, and high-value chemicals. The potential of this bioresource has led to intensive research efforts to develop cost-effective methods to break down lignocellulose. The efficiency with which the anaerobic fungi (phylum Neocallimastigomycota) degrade plant biomass is well recognized and in recent years has received renewed interest. Transcriptomics has been used to identify enzymes that are expressed by these fungi and are involved in the degradation of a range of lignocellulose feedstocks. The transcriptome is the entire complement of coding and non-coding RNA transcripts that are expressed by a cell under a particular set of conditions. Monitoring changes in gene expression can provide fundamental information about the biology of an organism. Here we outline a general methodology that will enable researchers to conduct comparative transcriptomic studies with the goal of identifying enzymes involved in the degradation of the plant cell wall. The method described will include growth of fungal cultures, isolation and sequencing of RNA, and a basic description of data analysis for bioinformatic identification of differentially expressed transcripts.
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Affiliation(s)
- Robert J Gruninger
- Lethbridge Research and Development Centre, Agriculture and Agri-Food Canada, Lethbridge, AB, Canada.
| | - Adrian Tsang
- Centre for Structural and Functional Genomics, Concordia University, Montreal, QC, Canada
| | - Tim A McAllister
- Lethbridge Research and Development Centre, Agriculture and Agri-Food Canada, Lethbridge, AB, Canada
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Enzyme Discovery in Anaerobic Fungi (Neocallimastigomycetes) Enables Lignocellulosic Biorefinery Innovation. Microbiol Mol Biol Rev 2022; 86:e0004122. [PMID: 35852448 PMCID: PMC9769567 DOI: 10.1128/mmbr.00041-22] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
Lignocellulosic biorefineries require innovative solutions to realize their full potential, and the discovery of novel lignocellulose-active enzymes could improve biorefinery deconstruction processes. Enzymatic deconstruction of plant cell walls is challenging, as noncarbohydrate linkages in hemicellulosic sidechains and lignin protect labile carbohydrates from hydrolysis. Highly specialized microbes that degrade plant biomass are attractive sources of enzymes for improving lignocellulose deconstruction, and the anaerobic gut fungi (Neocallimastigomycetes) stand out as having great potential for harboring novel lignocellulose-active enzymes. We discuss the known aspects of Neocallimastigomycetes lignocellulose deconstruction, including their extensive carbohydrate-active enzyme content, proficiency at deconstructing complex lignocellulose, unique physiology, synergistic enzyme complexes, and sizeable uncharacterized gene content. Progress describing Neocallimastigomycetes and their enzymes has been rapid in recent years, and it will only continue to expand. In particular, direct manipulation of anaerobic fungal genomes, effective heterologous expression of anaerobic fungal enzymes, and the ability to directly relate chemical changes in lignocellulose to fungal gene regulation will accelerate the discovery and subsequent deployment of Neocallimastigomycetes lignocellulose-active enzymes.
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46
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Kang M, Chhetri G, Kim I, So Y, Seo T. Comparative genomic analyses of four novel Ramlibacter species and the cellulose-degrading properties of Ramlibacter cellulosilyticus sp. nov. Sci Rep 2022; 12:21233. [PMID: 36482214 PMCID: PMC9731981 DOI: 10.1038/s41598-022-25718-w] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2022] [Accepted: 12/05/2022] [Indexed: 12/13/2022] Open
Abstract
In this study, four novel bacterial strains, USB13T, AW1T, GTP1T, and HM2T, were isolated from various environments in Busan and Jeju Island, Republic of Korea. The 16S rRNA sequencing results indicated that the four novel strains belong to the genus Ramlibacter. All four strains were tested for their potential cellulolytic properties, where strain USB13T was identified as the only novel bacterium and the first within its genus to show cellulolytic activity. When tested, the highest activities of endoglucanase, exoglucanase, β-glucosidase, and filter paper cellulase (FPCase) were 1.91 IU/mL, 1.77 IU/mL, 0.76 IU/mL, and 1.12 IU/mL, respectively at pH 6.0. Comparisons of draft whole genome sequences (WGS) were also made using average nucleotide identity, digital DNA-DNA hybridization values, and average amino acid identity values, while whole genome comparison was visualized using the BLAST Ring Image Generator. The G + C contents of the strains ranged from 67.9 to 69.9%, while genome sizes ranged from 4.31 to 6.15 Mbp. Based on polyphasic evidence, the novel strains represent four new species within the genus Ramlibacter, for which the names Ramlibacter cellulosilyticus sp. nov. (type strain, USB13T = KACC 21656T = NBRC 114839T) Ramlibacter aurantiacus sp. nov. (type strain, AW1T = KACC 21544T = NBRC 114862T), Ramlibacter albus sp. nov. (type strain, GTP1T = KACC 21702T = NBRC 114488T), and Ramlibacter pallidus sp. nov. (type strain, HM2T = KCTC 82557T = NBRC 114489T) are proposed.
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Affiliation(s)
- Minchung Kang
- grid.255168.d0000 0001 0671 5021Department of Life Science, Dongguk University-Seoul, Goyang, 10326 Korea
| | - Geeta Chhetri
- grid.255168.d0000 0001 0671 5021Department of Life Science, Dongguk University-Seoul, Goyang, 10326 Korea
| | - Inhyup Kim
- grid.255168.d0000 0001 0671 5021Department of Life Science, Dongguk University-Seoul, Goyang, 10326 Korea
| | - Yoonseop So
- grid.255168.d0000 0001 0671 5021Department of Life Science, Dongguk University-Seoul, Goyang, 10326 Korea
| | - Taegun Seo
- grid.255168.d0000 0001 0671 5021Department of Life Science, Dongguk University-Seoul, Goyang, 10326 Korea
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Wu Z, Peng K, Zhang Y, Wang M, Yong C, Chen L, Qu P, Huang H, Sun E, Pan M. Lignocellulose dissociation with biological pretreatment towards the biochemical platform: A review. Mater Today Bio 2022; 16:100445. [PMID: 36212906 PMCID: PMC9535326 DOI: 10.1016/j.mtbio.2022.100445] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2022] [Revised: 09/24/2022] [Accepted: 09/27/2022] [Indexed: 11/30/2022]
Abstract
Lignocellulose utilization has been gaining great attention worldwide due to its abundance, accessibility, renewability and recyclability. Destruction and dissociation of the cross-linked, hierarchical structure within cellulose hemicellulose and lignin is the key procedure during chemical utilization of lignocellulose. Of the pretreatments, biological treatment, which can effectively target the complex structures, is attractive due to its mild reaction conditions and environmentally friendly characteristics. Herein, we report a comprehensive review of the current biological pretreatments for lignocellulose dissociation and their corresponding degradation mechanisms. Firstly, we analyze the layered, hierarchical structure of cell wall, and the cross-linked network between cellulose, hemicellulose and lignin, then highlight that the cracking of β-aryl ether is considered the key to lignin degradation because of its dominant position. Secondly, we explore the effect of biological pretreatments, such as fungi, bacteria, microbial consortium, and enzymes, on substrate structure and degradation efficiency. Additionally, combining biological pretreatment with other methods (chemical methods and catalytic materials) may reduce the time necessary for the whole process, which also help to strengthen the lignocellulose dissociation efficiency. Thirdly, we summarize the related applications of lignocellulose, such as fuel production, chemicals platform, and bio-pulping, which could effectively alleviate the energy pressure through bioconversion into high value-added products. Based on reviewing of current progress of lignocellulose pretreatment, the challenges and future prospects are emphasized. Genetic engineering and other technologies to modify strains or enzymes for improved biotransformation efficiency will be the focus of future research.
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Affiliation(s)
- Zengyou Wu
- College of Materials Science and Engineering, Nanjing Forestry University, Nanjing, 210037, China
- Jiangsu Collaborative Innovation Center for Solid Organic Waste Resource Utilization/Key Laboratory of Saline-Alkali Soil Improvement and Utilization (Coastal Saline-Alkali Lands), Ministry of Agriculture and Rural Affairs/Institute of Agricultural Resources and Environment, Jiangsu Academy of Agricultural Sciences, Nanjing, 210014, China
| | - Kun Peng
- School of Agricultural Engineering, Jiangsu University, Zhenjiang, 212013, China
| | - Yin Zhang
- College of Materials Science and Engineering, Nanjing Forestry University, Nanjing, 210037, China
| | - Mei Wang
- School of Agricultural Engineering, Jiangsu University, Zhenjiang, 212013, China
| | - Cheng Yong
- Jiangsu Collaborative Innovation Center for Solid Organic Waste Resource Utilization/Key Laboratory of Saline-Alkali Soil Improvement and Utilization (Coastal Saline-Alkali Lands), Ministry of Agriculture and Rural Affairs/Institute of Agricultural Resources and Environment, Jiangsu Academy of Agricultural Sciences, Nanjing, 210014, China
| | - Ling Chen
- Jiangsu Collaborative Innovation Center for Solid Organic Waste Resource Utilization/Key Laboratory of Saline-Alkali Soil Improvement and Utilization (Coastal Saline-Alkali Lands), Ministry of Agriculture and Rural Affairs/Institute of Agricultural Resources and Environment, Jiangsu Academy of Agricultural Sciences, Nanjing, 210014, China
| | - Ping Qu
- Jiangsu Collaborative Innovation Center for Solid Organic Waste Resource Utilization/Key Laboratory of Saline-Alkali Soil Improvement and Utilization (Coastal Saline-Alkali Lands), Ministry of Agriculture and Rural Affairs/Institute of Agricultural Resources and Environment, Jiangsu Academy of Agricultural Sciences, Nanjing, 210014, China
| | - Hongying Huang
- Jiangsu Collaborative Innovation Center for Solid Organic Waste Resource Utilization/Key Laboratory of Saline-Alkali Soil Improvement and Utilization (Coastal Saline-Alkali Lands), Ministry of Agriculture and Rural Affairs/Institute of Agricultural Resources and Environment, Jiangsu Academy of Agricultural Sciences, Nanjing, 210014, China
| | - Enhui Sun
- Jiangsu Collaborative Innovation Center for Solid Organic Waste Resource Utilization/Key Laboratory of Saline-Alkali Soil Improvement and Utilization (Coastal Saline-Alkali Lands), Ministry of Agriculture and Rural Affairs/Institute of Agricultural Resources and Environment, Jiangsu Academy of Agricultural Sciences, Nanjing, 210014, China
- School of Agricultural Engineering, Jiangsu University, Zhenjiang, 212013, China
- College of Agriculture, Engineering and Science, University of KwaZulu-Natal (Pietermaritzburg Campus), Private Bag X01, Scottsville, 3209, South Africa
- Corresponding author. Jiangsu Collaborative Innovation Center for Solid Organic Waste Resource Utilization/Key Laboratory of Saline-Alkali Soil Improvement and Utilization (Coastal Saline-Alkali Lands), Ministry of Agriculture and Rural Affairs/Institute of Agricultural Resources and Environment, Jiangsu Academy of Agricultural Sciences, Nanjing, 210014, China.
| | - Mingzhu Pan
- College of Materials Science and Engineering, Nanjing Forestry University, Nanjing, 210037, China
- Corresponding author.
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A thermostable bacterial catalase-peroxidase oxidizes phenolic compounds derived from lignins. Appl Microbiol Biotechnol 2022; 107:201-217. [DOI: 10.1007/s00253-022-12263-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2022] [Revised: 10/19/2022] [Accepted: 10/23/2022] [Indexed: 11/27/2022]
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49
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Agro-Industrial Food Waste as a Low-Cost Substrate for Sustainable Production of Industrial Enzymes: A Critical Review. Catalysts 2022. [DOI: 10.3390/catal12111373] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
The grave environmental, social, and economic concerns over the unprecedented exploitation of non-renewable energy resources have drawn the attention of policy makers and research organizations towards the sustainable use of agro-industrial food and crop wastes. Enzymes are versatile biocatalysts with immense potential to transform the food industry and lignocellulosic biorefineries. Microbial enzymes offer cleaner and greener solutions to produce fine chemicals and compounds. The production of industrially important enzymes from abundantly present agro-industrial food waste offers economic solutions for the commercial production of value-added chemicals. The recent developments in biocatalytic systems are designed to either increase the catalytic capability of the commercial enzymes or create new enzymes with distinctive properties. The limitations of low catalytic efficiency and enzyme denaturation in ambient conditions can be mitigated by employing diverse and inexpensive immobilization carriers, such as agro-food based materials, biopolymers, and nanomaterials. Moreover, revolutionary protein engineering tools help in designing and constructing tailored enzymes with improved substrate specificity, catalytic activity, stability, and reaction product inhibition. This review discusses the recent developments in the production of essential industrial enzymes from agro-industrial food trash and the application of low-cost immobilization and enzyme engineering approaches for sustainable development.
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Electrochemical Valorization of Lignin: Status, Challenges, and Prospects. JOURNAL OF BIORESOURCES AND BIOPRODUCTS 2022. [DOI: 10.1016/j.jobab.2022.11.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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