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Asano T. Multicopper oxidase-2 mediated cuticle formation: Its contribution to evolution and success of insects as terrestrial organisms. INSECT BIOCHEMISTRY AND MOLECULAR BIOLOGY 2024; 168:104111. [PMID: 38508343 DOI: 10.1016/j.ibmb.2024.104111] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/30/2023] [Revised: 03/15/2024] [Accepted: 03/16/2024] [Indexed: 03/22/2024]
Abstract
The insect cuticle is a non-cellular matrix composed of polysaccharide chitins and proteins. The cuticle covers most of the body surface, including the trachea, foregut, and hindgut, and it is the body structure that separates the intraluminal environment from the external environment. The cuticle is essential to sustain their lives, both as a physical barrier to maintain homeostasis and as an exoskeleton that mechanically supports body shape and movement. Previously, we proposed a theory about the possibility that the cuticle-forming system contributes to the "evolution and success of insects." The main points of our theory are that 1) insects evolved an insect-specific system of cuticle formation and 2) the presence of this system may have provided insects with a competitive advantage in the early land ecosystems. The key to this theory is that insects utilize molecular oxygen abundant in the atmosphere, which differs from closely related crustaceans that form their cuticles with calcium ions. With newly obtained knowledge, this review revisits the significance of the insect-specific system for insects to adapt to terrestrial environments and also discusses the long-standing question in entomology as to why, despite their great success in terrestrial environments, they poorly adapt to marine environments.
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Affiliation(s)
- Tsunaki Asano
- Department of Biological Sciences, Tokyo Metropolitan, Minami-osawa 1-1, Hachioji, Tokyo, 192-0397, Japan.
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2
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Shi JF, Cheng MH, Zhou W, Zeng MZ, Chen Y, Yang JX, Wu H, Ye QH, Tang H, Zhang Q, Fu KY, Guo WC. Crucial roles of specialized chitinases in elytral and hindwing cuticles construction in Leptinotarsa decemlineata. PEST MANAGEMENT SCIENCE 2024. [PMID: 38656531 DOI: 10.1002/ps.8141] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/15/2024] [Revised: 03/25/2024] [Accepted: 04/24/2024] [Indexed: 04/26/2024]
Abstract
BACKGROUND The Colorado potato beetle (CPB), Leptinotarsa decemlineata, is a major potato (Solanum tuberosum) pest, infesting over 16 million km2 and causing substantial economic losses. The insect cuticle forms an apical extracellular matrix (ECM) envelope covering exposed organs to direct morphogenesis and confer structural protection. While select chitinase (Cht) genes have proven essential for larval development, their potential activities directing ECM remodeling underlying adult wing maturation remain undefined. RESULTS We investigated the expression patterns and performed an oral RNA interference (RNAi) screen targeting 19 LdChts in late-instar L. decemlineata larvae. Subsequently, we assessed their effects on adult eclosion and wing characteristics. Knockdown of LdCht5, LdCht7, LdCht10, LdIDGF2, and LdIDGF4, as well as others from Group IV (LdCht15, LdCht12, LdCht17, and LdCht13) and Groups VII-X (LdCht2, LdCht11, LdCht1, and LdCht3), resulting in shrunken, misshapen elytra with reduced areal density, as well as transverse wrinkling and impaired wing-tip folding in hindwings. Scanning electron micrographs revealed eroded elytral ridges alongside thinned, ruptured hindwing veins, indicative of mechanical fragility post-LdCht suppression. Spectroscopic analysis uncovered biomolecular alterations underlying the elytral anomalies, including decreases in peaks representing chitin, proteins, and lipids. This loss of essential ECM components provides evidence for the fragility, wrinkling, and shrinkage observed in the RNAi groups. CONCLUSION Our findings elucidate the crucial role of chitinases in the turnover of chitinous cuticles on beetle wings, offering insights into RNAi-based control strategies against this invasive pest. © 2024 Society of Chemical Industry.
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Affiliation(s)
- Ji-Feng Shi
- State Key Laboratory of Resource Insects, Southwest University, Chongqing, China
- Key Laboratory of Sericultural Biology and Genetic Breeding, Ministry of Agriculture and Rural Affairs, Chongqing, China
- College of Sericulture, Textile, and Biomass Sciences, Southwest University, Chongqing, China
| | - Man-Hong Cheng
- Chongqing College of Humanities, Science and Technology, Chongqing, China
| | - Wei Zhou
- State Key Laboratory of Resource Insects, Southwest University, Chongqing, China
- Key Laboratory of Sericultural Biology and Genetic Breeding, Ministry of Agriculture and Rural Affairs, Chongqing, China
- College of Sericulture, Textile, and Biomass Sciences, Southwest University, Chongqing, China
| | - Mu-Zi Zeng
- College of Sericulture, Textile, and Biomass Sciences, Southwest University, Chongqing, China
| | - Yu Chen
- College of Sericulture, Textile, and Biomass Sciences, Southwest University, Chongqing, China
| | - Jia-Xin Yang
- College of Sericulture, Textile, and Biomass Sciences, Southwest University, Chongqing, China
| | - Hao Wu
- College of Sericulture, Textile, and Biomass Sciences, Southwest University, Chongqing, China
| | - Qiu-Hong Ye
- College of Sericulture, Textile, and Biomass Sciences, Southwest University, Chongqing, China
| | - Hong Tang
- College of Sericulture, Textile, and Biomass Sciences, Southwest University, Chongqing, China
| | - Qing Zhang
- State Key Laboratory of Resource Insects, Southwest University, Chongqing, China
- Key Laboratory of Sericultural Biology and Genetic Breeding, Ministry of Agriculture and Rural Affairs, Chongqing, China
- College of Sericulture, Textile, and Biomass Sciences, Southwest University, Chongqing, China
| | - Kai-Yun Fu
- Ministry of Agriculture/Xinjiang Key Laboratory of Agricultural Biosafety, Institute of Plant Protection Xinjiang Academy of Agricultural Sciences/Key Laboratory of Integrated Pest Management on Crops in Northwestern Oasis, Urumqi, China
| | - Wen-Chao Guo
- Ministry of Agriculture/Xinjiang Key Laboratory of Agricultural Biosafety, Institute of Plant Protection Xinjiang Academy of Agricultural Sciences/Key Laboratory of Integrated Pest Management on Crops in Northwestern Oasis, Urumqi, China
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3
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Tamburrini KC, Kodama S, Grisel S, Haon M, Nishiuchi T, Bissaro B, Kubo Y, Longhi S, Berrin JG. The disordered C-terminal tail of fungal LPMOs from phytopathogens mediates protein dimerization and impacts plant penetration. Proc Natl Acad Sci U S A 2024; 121:e2319998121. [PMID: 38513096 PMCID: PMC10990093 DOI: 10.1073/pnas.2319998121] [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: 11/20/2023] [Accepted: 02/13/2024] [Indexed: 03/23/2024] Open
Abstract
Lytic polysaccharide monooxygenases (LPMOs) are monocopper enzymes that oxidatively degrade various polysaccharides, such as cellulose. Despite extensive research on this class of enzymes, the role played by their C-terminal regions predicted to be intrinsically disordered (dCTR) has been overlooked. Here, we investigated the function of the dCTR of an LPMO, called CoAA9A, up-regulated during plant infection by Colletotrichum orbiculare, the causative agent of anthracnose. After recombinant production of the full-length protein, we found that the dCTR mediates CoAA9A dimerization in vitro, via a disulfide bridge, a hitherto-never-reported property that positively affects both binding and activity on cellulose. Using SAXS experiments, we show that the homodimer is in an extended conformation. In vivo, we demonstrate that gene deletion impairs formation of the infection-specialized cell called appressorium and delays penetration of the plant. Using immunochemistry, we show that the protein is a dimer not only in vitro but also in vivo when secreted by the appressorium. As these peculiar LPMOs are also found in other plant pathogens, our findings open up broad avenues for crop protection.
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Affiliation(s)
- Ketty C. Tamburrini
- CNRS Aix Marseille Université, CNRS, Architecture et Fonction des Macromolécules Biologiques, UMR 7257, Marseille13009, France
- Institut National de la Recherche pour l’Agriculture, l’Alimentation et l'Environnement, Biodiversité et Biotechnologie Fongiques, UMR 1163, Aix Marseille Université, Marseille13009, France
| | - Sayo Kodama
- Faculty of Agriculture, Setsunan University, Osaka573-0101, Japan
| | - Sacha Grisel
- Institut National de la Recherche pour l’Agriculture, l’Alimentation et l'Environnement, Biodiversité et Biotechnologie Fongiques, UMR 1163, Aix Marseille Université, Marseille13009, France
- Institut National de la Recherche pour l’Agriculture, l’Alimentation et l’Environnement, Aix Marseille Université, 3PE Platform, Marseille13009, France
| | - Mireille Haon
- Institut National de la Recherche pour l’Agriculture, l’Alimentation et l'Environnement, Biodiversité et Biotechnologie Fongiques, UMR 1163, Aix Marseille Université, Marseille13009, France
- Institut National de la Recherche pour l’Agriculture, l’Alimentation et l’Environnement, Aix Marseille Université, 3PE Platform, Marseille13009, France
| | - Takumi Nishiuchi
- Division of Functional Genomics, Advanced Science Research Center, Kanazawa University, Kanazawa920-1164, Japan
| | - Bastien Bissaro
- Institut National de la Recherche pour l’Agriculture, l’Alimentation et l'Environnement, Biodiversité et Biotechnologie Fongiques, UMR 1163, Aix Marseille Université, Marseille13009, France
| | - Yasuyuki Kubo
- Faculty of Agriculture, Setsunan University, Osaka573-0101, Japan
| | - Sonia Longhi
- CNRS Aix Marseille Université, CNRS, Architecture et Fonction des Macromolécules Biologiques, UMR 7257, Marseille13009, France
| | - Jean-Guy Berrin
- Institut National de la Recherche pour l’Agriculture, l’Alimentation et l'Environnement, Biodiversité et Biotechnologie Fongiques, UMR 1163, Aix Marseille Université, Marseille13009, France
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4
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Chen Y, Tang H, Zhou W, Li C, Chen YN, Zhang Q, Fu KY, Guo WC, Shi JF. Identification of chitinase genes and roles in the larval-pupal transition of Leptinotarsa decemlineata. PEST MANAGEMENT SCIENCE 2024; 80:282-295. [PMID: 37671631 DOI: 10.1002/ps.7754] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/21/2023] [Revised: 08/12/2023] [Accepted: 09/06/2023] [Indexed: 09/07/2023]
Abstract
BACKGROUND Insect chitinases play crucial roles in degrading chitin in the extracellular matrix, affecting insect development and molting. However, our understanding of the specific functions of various chitinases in Leptinotarsa decemlineata is limited, hindering the deployment of novel gene-targeting technologies as pest management strategies. RESULTS We identified and characterized 19 full-length complementary DNA (cDNA) sequences of chitinase genes (LdChts) in Leptinotarsa decemlineata. Despite having varying domain architectures, all these chitinases contained at least one chitinase catalytic domain. Phylogenetic analysis classified the chitinase proteins into ten distinct clusters (groups I-X). Expression profiles showed the highest expression in chitin-rich tissues or during specific developmental stages from the larva-to-pupa transition. Gene-specific RNA interference (RNAi) experiments provided valuable insight into chitinase gene function. Silencing of group II LdCht10 prevented larval-larval molting, larval-prepupal, and prepupal-pupal processes. Moreover, our study revealed that LdCht5, LdCht2, LdCht11, LdCht1, and LdCht3 from groups I and VII-X were specifically essential for the transition from prepupal to pupal stage, whereas LdIDGF2 from group V was necessary for the larval-prepupal metamorphic process. The chitinase gene LdCht7 from group III and LdIDGF4 from group V were involved in both the larva-to-prepupa and the prepupa-to-pupa shift. Additionally, our findings also shed light on the exclusive expression of nine chitinase genes within group IV in the digestive system, suggesting their potential role in regulating larval body weight and larva-to-pupa transition. CONCLUSION Our results provide a comprehensive understanding of the functional specialization of chitinase genes during the molting process of various stages and identify potential targets for RNAi-based management of Leptinotarsa decemlineata. © 2023 Society of Chemical Industry.
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Affiliation(s)
- Yu Chen
- State Key Laboratory of Resource Insects, Southwest University, Chongqing, China
- Key Laboratory of Sericultural Biology and Genetic Breeding, Ministry of Agriculture and Rural Affairs, Southwest University, Chongqing, China
- College of Sericulture, Textile, and Biomass Sciences, Southwest University, Chongqing, China
| | - Hong Tang
- State Key Laboratory of Resource Insects, Southwest University, Chongqing, China
- Key Laboratory of Sericultural Biology and Genetic Breeding, Ministry of Agriculture and Rural Affairs, Southwest University, Chongqing, China
- College of Sericulture, Textile, and Biomass Sciences, Southwest University, Chongqing, China
| | - Wei Zhou
- State Key Laboratory of Resource Insects, Southwest University, Chongqing, China
- Key Laboratory of Sericultural Biology and Genetic Breeding, Ministry of Agriculture and Rural Affairs, Southwest University, Chongqing, China
- College of Sericulture, Textile, and Biomass Sciences, Southwest University, Chongqing, China
| | - Chang Li
- State Key Laboratory of Resource Insects, Southwest University, Chongqing, China
- Key Laboratory of Sericultural Biology and Genetic Breeding, Ministry of Agriculture and Rural Affairs, Southwest University, Chongqing, China
- College of Sericulture, Textile, and Biomass Sciences, Southwest University, Chongqing, China
| | - Yi-Nan Chen
- State Key Laboratory of Resource Insects, Southwest University, Chongqing, China
- Key Laboratory of Sericultural Biology and Genetic Breeding, Ministry of Agriculture and Rural Affairs, Southwest University, Chongqing, China
- College of Sericulture, Textile, and Biomass Sciences, Southwest University, Chongqing, China
| | - Qing Zhang
- State Key Laboratory of Resource Insects, Southwest University, Chongqing, China
- Key Laboratory of Sericultural Biology and Genetic Breeding, Ministry of Agriculture and Rural Affairs, Southwest University, Chongqing, China
- College of Sericulture, Textile, and Biomass Sciences, Southwest University, Chongqing, China
| | - Kai-Yun Fu
- Department of Plant Protection, Xinjiang Academy of Agricultural Sciences, Urumqi, China
| | - Wen-Chao Guo
- Department of Plant Protection, Xinjiang Academy of Agricultural Sciences, Urumqi, China
| | - Ji-Feng Shi
- State Key Laboratory of Resource Insects, Southwest University, Chongqing, China
- Key Laboratory of Sericultural Biology and Genetic Breeding, Ministry of Agriculture and Rural Affairs, Southwest University, Chongqing, China
- College of Sericulture, Textile, and Biomass Sciences, Southwest University, Chongqing, China
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Lee Y, Muthukrishnan S, Kramer KJ, Sakamoto T, Tabunoki H, Arakane Y, Noh MY. Functional importance of groups I and II chitinases in cuticle chitin turnover during molting in a wood-boring beetle, Monochamus alternatus. PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY 2023; 194:105496. [PMID: 37532355 DOI: 10.1016/j.pestbp.2023.105496] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/01/2023] [Revised: 06/05/2023] [Accepted: 06/10/2023] [Indexed: 08/04/2023]
Abstract
Insects must periodically replace their old cuticle/exoskeleton with a new one in a process called molting or ecdysis to allow for continuous growth through sequential developmental stages. Many RNA interference (RNAi) studies have demonstrated that certain chitinases (CHTs) play roles in this vital physiological event because knockdown of these CHT genes resulted in developmental arrest during the ensuing molting period in several insect species. In this research we analyzed the functions of group I (MaCHT5) and group II (MaCHT10) CHT genes in molting of the Japanese pine sawyer, Monochamus alternatus, an important forest pest known as a major vector of the pinewood nematode. Real-time qPCR revealed that these two CHT genes differ in their expression patterns during late stages of development. Depletion of either MaCHT5 or MaCHT10 transcripts by RNAi resulted in lethal larval-pupal and pupal-adult molting defects depending on the double-stranded RNA (dsRNA) injection timing during development. The insects were unable to shed their old cuticle and died. Furthermore, transmission electron microscopic analysis revealed that, unlike dsEGFP-treated controls, dsMaCHT5- and dsMaCHT10-treated pharate adults exhibited a failure of degradation of the endocuticular layer of their old pupal cuticle, retaining nearly intact horizontal chitinous laminae and vertical pore canal fibers. Both enzymes were indispensable for complete turnover of the chitinous old endocuticle, which is critical for insect molting. The possible functions of two spliced variants of MaCHT10, namely, MaCHT10a and MaCHT10b, are also discussed. Our results add to the knowledge base for further functional studies of insect chitin catabolism by revealing the relative importance of both MaCHT5 and MaCHT10 in chitin turnover with subtle differences in their action. These essential genes and their encoded proteins are potential targets to manipulate for controlling populations of M. alternatus and other pest insects.
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Affiliation(s)
- Youngseo Lee
- Department of Forest Resources, AgriBio Institute of Climate Change Management, Chonnam National University, Gwangju 61186, South Korea
| | - Subbaratnam Muthukrishnan
- Department of Biochemistry and Molecular Biophysics, Kansas State University, Chalmers Hall, Manhattan, Kansas 66506, USA
| | - Karl J Kramer
- Department of Biochemistry and Molecular Biophysics, Kansas State University, Chalmers Hall, Manhattan, Kansas 66506, USA
| | - Takuma Sakamoto
- Department of Science of Biological Production, Graduate School of Agriculture, Tokyo University of Agriculture and Technology, Tokyo 183-8509, Japan
| | - Hiroko Tabunoki
- Department of Science of Biological Production, Graduate School of Agriculture, Tokyo University of Agriculture and Technology, Tokyo 183-8509, Japan
| | - Yasuyuki Arakane
- Department of Applied Biology, Chonnam National University, Gwangju 61186, South Korea.
| | - Mi Young Noh
- Department of Forest Resources, AgriBio Institute of Climate Change Management, Chonnam National University, Gwangju 61186, South Korea.
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Trinca V, Carli S, Uliana JVC, Garbelotti CV, Mendes da Silva M, Kunes V, Meleiro LP, Brancini GTP, Menzel F, Andrioli LPM, Torres TT, Ward RJ, Monesi N. Biocatalytic potential of Pseudolycoriella CAZymes (Sciaroidea, Diptera) in degrading plant and fungal cell wall polysaccharides. iScience 2023; 26:106449. [PMID: 37020966 PMCID: PMC10068558 DOI: 10.1016/j.isci.2023.106449] [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: 10/24/2022] [Revised: 01/31/2023] [Accepted: 03/15/2023] [Indexed: 04/07/2023] Open
Abstract
Soil biota has a crucial impact on soil ecology, global climate changes, and effective crop management and studying the diverse ecological roles of dipteran larvae deepens the understanding of soil food webs. A multi-omics study of Pseudolycoriella hygida comb. nov. (Diptera: Sciaroidea: Sciaridae) aimed to characterize carbohydrate-active enzymes (CAZymes) for litter degradation in this species. Manual curation of 17,881 predicted proteins in the Psl. hygida genome identified 137 secreted CAZymes, of which 33 are present in the saliva proteome, and broadly confirmed by saliva CAZyme catalytic profiling against plant cell wall polysaccharides and pNP-glycosyl substrates. Comparisons with two other sciarid species and the outgroup Lucilia cuprina (Diptera: Calliphoridae) identified 42 CAZyme families defining a sciarid CAZyme profile. The litter-degrading potential of sciarids corroborates their significant role as decomposers, yields insights to the evolution of insect feeding habits, and highlights the importance of insects as a source of biotechnologically relevant enzymes.
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Affiliation(s)
- Vitor Trinca
- Programa de Biologia Celular e Molecular, Faculdade de Medicina de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, São Paulo 14049-900, Brazil
| | - Sibeli Carli
- Departamento de Química, Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, São Paulo 14040-901, Brazil
| | - João Vitor Cardoso Uliana
- Programa de Biologia Celular e Molecular, Faculdade de Medicina de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, São Paulo 14049-900, Brazil
| | - Carolina Victal Garbelotti
- Departamento de Química, Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, São Paulo 14040-901, Brazil
| | - Mariana Mendes da Silva
- Departamento de Análises Clínicas, Toxicológicas e Bromatológicas, Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, São Paulo 14040-903, Brazil
| | - Vitor Kunes
- Departamento de Química, Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, São Paulo 14040-901, Brazil
| | - Luana Parras Meleiro
- Departamento de Química, Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, São Paulo 14040-901, Brazil
| | - Guilherme Thomaz Pereira Brancini
- Departamento de Análises Clínicas, Toxicológicas e Bromatológicas, Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, São Paulo 14040-903, Brazil
| | - Frank Menzel
- Senckenberg Deutsches Entomologisches Institut (SDEI), 15374 Müncheberg, Germany
| | - Luiz Paulo Moura Andrioli
- Escola de Artes, Ciências e Humanidades, Universidade de São Paulo, São Paulo, São Paulo 03828-000, Brazil
| | - Tatiana Teixeira Torres
- Departamento de Genética e Biologia Evolutiva, Instituto de Biociências, Universidade de São Paulo, São Paulo, São Paulo 05508-090, Brazil
| | - Richard John Ward
- Departamento de Química, Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, São Paulo 14040-901, Brazil
- Corresponding author
| | - Nadia Monesi
- Departamento de Análises Clínicas, Toxicológicas e Bromatológicas, Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, São Paulo 14040-903, Brazil
- Corresponding author
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Guo X, An Y, Liu F, Lu F, Wang B. Lytic polysaccharide monooxygenase - A new driving force for lignocellulosic biomass degradation. BIORESOURCE TECHNOLOGY 2022; 362:127803. [PMID: 35995343 DOI: 10.1016/j.biortech.2022.127803] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/20/2022] [Revised: 08/15/2022] [Accepted: 08/16/2022] [Indexed: 06/15/2023]
Abstract
Lytic polysaccharide monooxygenases (LPMOs) can catalyze polysaccharides by oxidative cleavage of glycosidic bonds and have catalytic activity for cellulose, hemicellulose, chitin, starch and pectin, thus playing an important role in the biomass conversion of lignocellulose. The catalytic substrates of LPMOs are different and the specific catalytic mechanism has not been fully elucidated. Although there have been many studies related to LPMOs, few have actually been put into industrial biomass conversion, which poses a challenge for their expression, regulation and application. In this review, the origin, substrate specificity, structural features, and the relationship between structure and function of LPMOs are described. Additionally, the catalytic mechanism and electron donor of LPMOs and their heterologous expression and regulation are discussed. Finally, the synergistic degradation of biomass by LPMOs with other polysaccharide hydrolases is reviewed, and their current problems and future research directions are pointed out.
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Affiliation(s)
- Xiao Guo
- College of Chemical and Biological Engineering, Shandong University of Science and Technology, Qingdao 266590, PR China; Key Laboratory of Industrial Fermentation Microbiology of the Ministry of Education, College of Biotechnology, Tianjin University of Science and Technology, Tianjin 300450, PR China
| | - Yajing An
- Key Laboratory of Industrial Fermentation Microbiology of the Ministry of Education, College of Biotechnology, Tianjin University of Science and Technology, Tianjin 300450, PR China
| | - Fufeng Liu
- Key Laboratory of Industrial Fermentation Microbiology of the Ministry of Education, College of Biotechnology, Tianjin University of Science and Technology, Tianjin 300450, PR China
| | - Fuping Lu
- Key Laboratory of Industrial Fermentation Microbiology of the Ministry of Education, College of Biotechnology, Tianjin University of Science and Technology, Tianjin 300450, PR China
| | - Bo Wang
- College of Chemical and Biological Engineering, Shandong University of Science and Technology, Qingdao 266590, PR China.
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