1
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Haddad Momeni M, Zitting A, Jäämuru V, Turunen R, Penttilä P, Buchko GW, Hiltunen S, Maiorova N, Koivula A, Sapkota J, Marjamaa K, Master ER. Insights into the action of phylogenetically diverse microbial expansins on the structure of cellulose microfibrils. BIOTECHNOLOGY FOR BIOFUELS AND BIOPRODUCTS 2024; 17:56. [PMID: 38654330 DOI: 10.1186/s13068-024-02500-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/31/2024] [Accepted: 04/04/2024] [Indexed: 04/25/2024]
Abstract
BACKGROUND Microbial expansins (EXLXs) are non-lytic proteins homologous to plant expansins involved in plant cell wall formation. Due to their non-lytic cell wall loosening properties and potential to disaggregate cellulosic structures, there is considerable interest in exploring the ability of microbial expansins (EXLX) to assist the processing of cellulosic biomass for broader biotechnological applications. Herein, EXLXs with different modular structure and from diverse phylogenetic origin were compared in terms of ability to bind cellulosic, xylosic, and chitinous substrates, to structurally modify cellulosic fibrils, and to boost enzymatic deconstruction of hardwood pulp. RESULTS Five heterogeneously produced EXLXs (Clavibacter michiganensis; CmiEXLX2, Dickeya aquatica; DaqEXLX1, Xanthomonas sacchari; XsaEXLX1, Nothophytophthora sp.; NspEXLX1 and Phytophthora cactorum; PcaEXLX1) were shown to bind xylan and hardwood pulp at pH 5.5 and CmiEXLX2 (harboring a family-2 carbohydrate-binding module) also bound well to crystalline cellulose. Small-angle X-ray scattering revealed a 20-25% increase in interfibrillar distance between neighboring cellulose microfibrils following treatment with CmiEXLX2, DaqEXLX1, or NspEXLX1. Correspondingly, combining xylanase with CmiEXLX2 and DaqEXLX1 increased product yield from hardwood pulp by ~ 25%, while supplementing the TrAA9A LPMO from Trichoderma reesei with CmiEXLX2, DaqEXLX1, and NspEXLX1 increased total product yield by over 35%. CONCLUSION This direct comparison of diverse EXLXs revealed consistent impacts on interfibrillar spacing of cellulose microfibers and performance of carbohydrate-active enzymes predicted to act on fiber surfaces. These findings uncover new possibilities to employ EXLXs in the creation of value-added materials from cellulosic biomass.
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Affiliation(s)
- Majid Haddad Momeni
- Department of Bioproducts and Biosystems, Aalto University, Kemistintie 1, 02150, Espoo, Finland.
| | - Aleksi Zitting
- Department of Bioproducts and Biosystems, Aalto University, Kemistintie 1, 02150, Espoo, Finland
| | - Vilma Jäämuru
- Department of Bioproducts and Biosystems, Aalto University, Kemistintie 1, 02150, Espoo, Finland
| | - Rosaliina Turunen
- Department of Bioproducts and Biosystems, Aalto University, Kemistintie 1, 02150, Espoo, Finland
| | - Paavo Penttilä
- Department of Bioproducts and Biosystems, Aalto University, Kemistintie 1, 02150, Espoo, Finland
| | - Garry W Buchko
- Earth and Biological Sciences Directorate, Pacific Northwest National Laboratory, Richland, WA, 99354, USA
- School of Molecular Biosciences, Washington State University, Pullman, WA, 99164, USA
| | - Salla Hiltunen
- NE Research Center, UPM Pulp Research and Innovations, 53200, Lappeenranta, Finland
| | - Natalia Maiorova
- VTT Technical Research Centre of Finland Ltd, P.O. Box 1000, 02044-VTT, Espoo, Finland
| | - Anu Koivula
- VTT Technical Research Centre of Finland Ltd, P.O. Box 1000, 02044-VTT, Espoo, Finland
| | - Janak Sapkota
- NE Research Center, UPM Pulp Research and Innovations, 53200, Lappeenranta, Finland
| | - Kaisa Marjamaa
- VTT Technical Research Centre of Finland Ltd, P.O. Box 1000, 02044-VTT, Espoo, Finland
| | - Emma R Master
- Department of Bioproducts and Biosystems, Aalto University, Kemistintie 1, 02150, Espoo, Finland.
- Department of Chemical Engineering and Applied Chemistry, University of Toronto, 200 College Street, Toronto, ON, M5S 3E5, Canada.
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2
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de Sandozequi A, Salazar-Cortés JJ, Tapia-Vázquez I, Martínez-Anaya C. Prevalent association with the bacterial cell envelope of prokaryotic expansins revealed by bioinformatics analysis. Protein Sci 2022; 31:e4315. [PMID: 35481628 PMCID: PMC9045087 DOI: 10.1002/pro.4315] [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: 12/20/2021] [Revised: 04/05/2022] [Accepted: 04/06/2022] [Indexed: 11/10/2022]
Abstract
Expansins are a group of proteins from diverse organisms from bacteria to plants. Although expansins show structural conservation, their biological roles seem to differ among kingdoms. In plants, these proteins remodel the cell wall during plant growth and other processes. Contrarily, determination of bacterial expansin activity has proven difficult, although genetic evidence of bacterial mutants indicates that expansins participate in bacteria-plant interactions. Nevertheless, a large proportion of expansin genes are found in the genomes of free-living bacteria, suggesting roles that are independent of the interaction with living plants. Here, we analyzed all available sequences of prokaryotic expansins for correlations between surface electric charge, extra protein modules, and sequence motifs for association with the bacteria exterior after export. Additionally, information on the fate of protein after translocation across the membrane also points to bacterial cell association of expansins through six different mechanisms, such as attachment of a lipid molecule for membrane anchoring in diderm species or covalent linking to the peptidoglycan layer in monoderms such as the Bacilliales. Our results have implications for expansin function in the context of bacteria-plant interactions and also for free-living species in which expansins might affect cell-cell or cell-substrate interaction properties and indicate the need to re-examine the roles currently considered for these proteins.
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Affiliation(s)
- Andrés de Sandozequi
- Departamento de Ingeniería Celular y Biocatálisis, Instituto de Biotecnología, UNAM, Av. Universidad 2001, Chamilpa, Cuernavaca, Morelos, Mexico
| | - Juan José Salazar-Cortés
- Departamento de Ingeniería Celular y Biocatálisis, Instituto de Biotecnología, UNAM, Av. Universidad 2001, Chamilpa, Cuernavaca, Morelos, Mexico
| | - Irán Tapia-Vázquez
- Departamento de Ingeniería Celular y Biocatálisis, Instituto de Biotecnología, UNAM, Av. Universidad 2001, Chamilpa, Cuernavaca, Morelos, Mexico
| | - Claudia Martínez-Anaya
- Departamento de Ingeniería Celular y Biocatálisis, Instituto de Biotecnología, UNAM, Av. Universidad 2001, Chamilpa, Cuernavaca, Morelos, Mexico
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3
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Herburger K, Franková L, Pičmanová M, Xin A, Meulewaeter F, Hudson A, Fry SC. Defining natural factors that stimulate and inhibit cellulose:xyloglucan hetero-transglucosylation. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2021; 105:1549-1565. [PMID: 33314395 PMCID: PMC8611796 DOI: 10.1111/tpj.15131] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/09/2020] [Revised: 11/24/2020] [Accepted: 12/08/2020] [Indexed: 06/12/2023]
Abstract
Certain transglucanases can covalently graft cellulose and mixed-linkage β-glucan (MLG) as donor substrates onto xyloglucan as acceptor substrate and thus exhibit cellulose:xyloglucan endotransglucosylase (CXE) and MLG:xyloglucan endotransglucosylase (MXE) activities in vivo and in vitro. However, missing information on factors that stimulate or inhibit these hetero-transglucosylation reactions limits our insight into their biological functions. To explore factors that influence hetero-transglucosylation, we studied Equisetum fluviatile hetero-trans-β-glucanase (EfHTG), which exhibits both CXE and MXE activity, exceeding its xyloglucan:xyloglucan homo-transglucosylation (XET) activity. Enzyme assays employed radiolabelled and fluorescently labelled oligomeric acceptor substrates, and were conducted in vitro and in cell walls (in situ). With whole denatured Equisetum cell walls as donor substrate, exogenous EfHTG (extracted from Equisetum or produced in Pichia) exhibited all three activities (CXE, MXE, XET) in competition with each other. Acting on pure cellulose as donor substrate, the CXE action of Pichia-produced EfHTG was up to approximately 300% increased by addition of methanol-boiled Equisetum extracts; there was no similar effect when the same enzyme acted on soluble donors (MLG or xyloglucan). The methanol-stable factor is proposed to be expansin-like, a suggestion supported by observations of pH dependence. Screening numerous low-molecular-weight compounds for hetero-transglucanase inhibition showed that cellobiose was highly effective, inhibiting the abundant endogenous CXE and MXE (but not XET) action in Equisetum internodes. Furthermore, cellobiose retarded Equisetum stem elongation, potentially owing to its effect on hetero-transglucosylation reactions. This work provides insight and tools to further study the role of cellulose hetero-transglucosylation in planta by identifying factors that govern this reaction.
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Affiliation(s)
- Klaus Herburger
- The Edinburgh Cell Wall GroupInstitute of Molecular Plant SciencesSchool of Biological SciencesThe University of EdinburghEdinburghEH9 3BFUK
- Present address:
Section for Plant GlycobiologyDepartment of Plant and Environmental SciencesUniversity of CopenhagenFrederiksberg1871Denmark
| | - Lenka Franková
- The Edinburgh Cell Wall GroupInstitute of Molecular Plant SciencesSchool of Biological SciencesThe University of EdinburghEdinburghEH9 3BFUK
| | - Martina Pičmanová
- The Edinburgh Cell Wall GroupInstitute of Molecular Plant SciencesSchool of Biological SciencesThe University of EdinburghEdinburghEH9 3BFUK
| | - Anzhou Xin
- The Edinburgh Cell Wall GroupInstitute of Molecular Plant SciencesSchool of Biological SciencesThe University of EdinburghEdinburghEH9 3BFUK
| | - Frank Meulewaeter
- BBCC Innovation Center Gent – Trait ResearchBASFGent (Zwijnaarde)9052Belgium
| | - Andrew Hudson
- The Edinburgh Cell Wall GroupInstitute of Molecular Plant SciencesSchool of Biological SciencesThe University of EdinburghEdinburghEH9 3BFUK
| | - Stephen C. Fry
- The Edinburgh Cell Wall GroupInstitute of Molecular Plant SciencesSchool of Biological SciencesThe University of EdinburghEdinburghEH9 3BFUK
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4
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Herburger K, Franková L, Pičmanová M, Loh JW, Valenzuela-Ortega M, Meulewaeter F, Hudson AD, French CE, Fry SC. Hetero-trans-β-Glucanase Produces Cellulose-Xyloglucan Covalent Bonds in the Cell Walls of Structural Plant Tissues and Is Stimulated by Expansin. MOLECULAR PLANT 2020; 13:1047-1062. [PMID: 32376294 PMCID: PMC7339142 DOI: 10.1016/j.molp.2020.04.011] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/21/2020] [Revised: 04/17/2020] [Accepted: 04/28/2020] [Indexed: 05/19/2023]
Abstract
Current cell-wall models assume no covalent bonding between cellulose and hemicelluloses such as xyloglucan or mixed-linkage β-d-glucan (MLG). However, Equisetum hetero-trans-β-glucanase (HTG) grafts cellulose onto xyloglucan oligosaccharides (XGOs) - and, we now show, xyloglucan polysaccharide - in vitro, thus exhibiting CXE (cellulose:xyloglucan endotransglucosylase) activity. In addition, HTG also catalyzes MLG-to-XGO bonding (MXE activity). In this study, we explored the CXE action of HTG in native plant cell walls and tested whether expansin exposes cellulose to HTG by disrupting hydrogen bonds. To quantify and visualize CXE and MXE action, we assayed the sequential release of HTG products from cell walls pre-labeled with substrate mimics. We demonstrated covalent cellulose-xyloglucan bonding in plant cell walls and showed that CXE and MXE action was up to 15% and 60% of total transglucanase action, respectively, and peaked in aging, strengthening tissues: CXE in xylem and cells bordering intercellular canals and MXE in sclerenchyma. Recombinant bacterial expansin (EXLX1) strongly augmented CXE activity in vitro. CXE and MXE action in living Equisetum structural tissues potentially strengthens stems, while expansin might augment the HTG-catalyzed CXE reaction, thereby allowing efficient CXE action in muro. Our methods will enable surveys for comparable reactions throughout the plant kingdom. Furthermore, engineering similar hetero-polymer formation into angiosperm crop plants may improve certain agronomic traits such as lodging tolerance.
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Affiliation(s)
- Klaus Herburger
- The Edinburgh Cell Wall Group, Institute of Molecular Plant Sciences, School of Biological Sciences, The University of Edinburgh, Edinburgh EH9 3BF, United Kingdom.
| | - Lenka Franková
- The Edinburgh Cell Wall Group, Institute of Molecular Plant Sciences, School of Biological Sciences, The University of Edinburgh, Edinburgh EH9 3BF, United Kingdom
| | - Martina Pičmanová
- The Edinburgh Cell Wall Group, Institute of Molecular Plant Sciences, School of Biological Sciences, The University of Edinburgh, Edinburgh EH9 3BF, United Kingdom
| | - Jia Wooi Loh
- The Edinburgh Cell Wall Group, Institute of Molecular Plant Sciences, School of Biological Sciences, The University of Edinburgh, Edinburgh EH9 3BF, United Kingdom
| | - Marcos Valenzuela-Ortega
- Institute of Quantitative Biology, Biochemistry and Biotechnology, School of Biological Sciences, The University of Edinburgh, Edinburgh EH9 3BF, United Kingdom
| | - Frank Meulewaeter
- BASF, BBCC Innovation Center Gent - Trait Research, 9052 Gent (Zwijnaarde), Belgium
| | - Andrew D Hudson
- The Edinburgh Cell Wall Group, Institute of Molecular Plant Sciences, School of Biological Sciences, The University of Edinburgh, Edinburgh EH9 3BF, United Kingdom
| | - Christopher E French
- Institute of Quantitative Biology, Biochemistry and Biotechnology, School of Biological Sciences, The University of Edinburgh, Edinburgh EH9 3BF, United Kingdom; Zhejiang University-University of Edinburgh Joint Research Centre for Engineering Biology, Zhejiang University, Haining, Zhejiang 314400, China
| | - Stephen C Fry
- The Edinburgh Cell Wall Group, Institute of Molecular Plant Sciences, School of Biological Sciences, The University of Edinburgh, Edinburgh EH9 3BF, United Kingdom
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5
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Engineering of industrially important microorganisms for assimilation of cellulosic biomass: towards consolidated bioprocessing. Biochem Soc Trans 2020; 47:1781-1794. [PMID: 31845725 DOI: 10.1042/bst20190293] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2019] [Revised: 11/28/2019] [Accepted: 11/28/2019] [Indexed: 01/01/2023]
Abstract
Conversion of cellulosic biomass (non-edible plant material) to products such as chemical feedstocks and liquid fuels is a major goal of industrial biotechnology and an essential component of plans to move from an economy based on fossil carbon to one based on renewable materials. Many microorganisms can effectively degrade cellulosic biomass, but attempts to engineer this ability into industrially useful strains have met with limited success, suggesting an incomplete understanding of the process. The recent discovery and continuing study of enzymes involved in oxidative depolymerisation, as well as more detailed study of natural cellulose degradation processes, may offer a way forward.
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6
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Mohamad Nor N, Hashim NHF, Quay DHX, Mahadi NM, Illias RM, Abu Bakar FD, Murad AMA. Functional and structural analyses of an expansin-like protein from the antarctic yeast Glaciozyma antarctica PI12 reveal strategies of nutrient scavenging in the sea ice environment. Int J Biol Macromol 2020; 144:231-241. [DOI: 10.1016/j.ijbiomac.2019.12.099] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2019] [Revised: 12/12/2019] [Accepted: 12/12/2019] [Indexed: 01/05/2023]
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7
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Peng LN, Xu YQ, Wang X, Feng X, Zhao QQ, Feng SS, Zhao ZY, Hu BZ, Li FL. Overexpression of paralogues of the wheat expansin gene TaEXPA8 improves low-temperature tolerance in Arabidopsis. PLANT BIOLOGY (STUTTGART, GERMANY) 2019; 21:1119-1131. [PMID: 31192523 DOI: 10.1111/plb.13018] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/17/2019] [Accepted: 06/06/2019] [Indexed: 05/24/2023]
Abstract
Low temperature is one of the important factors limiting wheat yield in cold regions. Expansins are nonenzymatic proteins that loosen cell walls and play important roles in diverse biological processes related to cell wall modification, including development and stress tolerance. Many studies have shown that expansins are involved in resistance to various abiotic stresses, such as heat and drought. However, the role of expansins in response to low-temperature stress remains unclear. Based on our previous transcriptome data of a winter wheat cultivar Dongnongdongmai 2 (DN2), we found that one of the expansin genes, TaEXPA8, was significantly induced by low temperature, indicating a role for TaEXPA8 in cold resistance. In this study, the paralogous TaEXPA8 genes TaEXPA8-A, TaEXPA8-B and TaEXPA8-D were cloned by RT-PCR. These three genes were then transformed into Arabidopsis by the floral dip method. Expression patterns of TaEXPA8 genes in different tissues and in response to several abiotic stresses and hormones were detected by quantitative real-time PCR (qRT-PCR). The results showed that TaEXPA8-A and TaEXPA8-B were expressed mainly in roots, while TaEXPA8-D was expressed predominantly in flowers. TaEXPA8 genes were induced by low-temperature and drought. The overexpression of TaEXPA8-B and TaEXPA8-D enhanced low-temperature resistance and had increased superoxide dismutase (SOD), peroxidase (POD) and catalase (CAT) activity and soluble protein, MDA and proline content. In summary, our study suggested that the expansins TaEXPA8-B and TaEXPA8-D are involved in the response to low temperature and possibly play a role in cold resistance by activating the protective enzyme system.
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Affiliation(s)
- L N Peng
- College of Life Science, Northeast Agricultural Univerisity, Harbin, China
| | - Y Q Xu
- College of Life Science, Northeast Agricultural Univerisity, Harbin, China
| | - X Wang
- College of Life Science, Northeast Agricultural Univerisity, Harbin, China
| | - X Feng
- College of Life Science, Northeast Agricultural Univerisity, Harbin, China
| | - Q Q Zhao
- College of Life Science, Northeast Agricultural Univerisity, Harbin, China
| | - S S Feng
- College of Life Science, Northeast Agricultural Univerisity, Harbin, China
| | - Z Y Zhao
- College of Life Science, Northeast Agricultural Univerisity, Harbin, China
| | - B Z Hu
- Harbin University, Harbin, China
| | - F L Li
- College of Life Science, Northeast Agricultural Univerisity, Harbin, China
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8
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Hepler NK, Cosgrove DJ. Directed
in vitro
evolution of bacterial expansin BsEXLX1 for higher cellulose binding and its consequences for plant cell wall‐loosening activities. FEBS Lett 2019; 593:2545-2555. [DOI: 10.1002/1873-3468.13528] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2019] [Revised: 06/28/2019] [Accepted: 07/02/2019] [Indexed: 11/09/2022]
Affiliation(s)
- Nathan K. Hepler
- Huck Institutes of the Life Sciences The Pennsylvania State University University Park PA USA
- Department of Biology The Pennsylvania State University University Park PA USA
| | - Daniel J. Cosgrove
- Huck Institutes of the Life Sciences The Pennsylvania State University University Park PA USA
- Department of Biology The Pennsylvania State University University Park PA USA
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9
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Computational study of FaEXPA1, a strawberry alpha expansin protein, through molecular modeling and molecular dynamics simulation studies. Comput Biol Chem 2018; 76:79-86. [DOI: 10.1016/j.compbiolchem.2018.05.018] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2018] [Revised: 04/26/2018] [Accepted: 05/15/2018] [Indexed: 11/22/2022]
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10
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Tovar-Herrera OE, Rodríguez M, Olarte-Lozano M, Sampedro-Guerrero JA, Guerrero A, Pinto-Cámara R, Alvarado-Affantranger X, Wood CD, Moran-Mirabal JM, Pastor N, Segovia L, Martínez-Anaya C. Analysis of the Binding of Expansin Exl1, from Pectobacterium carotovorum, to Plant Xylem and Comparison to EXLX1 from Bacillus subtilis. ACS OMEGA 2018; 3:7008-7018. [PMID: 30221235 PMCID: PMC6130903 DOI: 10.1021/acsomega.8b00406] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/05/2018] [Accepted: 06/11/2018] [Indexed: 05/27/2023]
Abstract
The plant xylem is a preferred niche for some important bacterial phytopathogens, some of them encoding expansin proteins, which bind plant cell walls. Yet, the identity of the substrate for bacterial expansins within the plant cell wall and the nature of its interaction with it are poorly known. Here, we determined the localization of two bacterial expansins with differing isoelectric points (and with differing binding patterns to cell wall extracts) on plant tissue through in vitro fluorophore labeling and confocal imaging. Differential localization was observed, in which Exl1 from Pectobacterium carotovorum located into the intercellular spaces between xylem vessels and adjacent cells of the plant xylem, whereas EXLX1 from Bacillus subtilis bound cell walls of most cell types. In isolated vascular tissue, however, both PcExl1 and BsEXLX1 preferentially bound to tracheary elements over the xylem fibers, even though both are composed of secondary cell walls. Fluorescence correlation spectroscopy, employed to analyze the interaction of expansins with isolated xylem, indicates that binding is governed by more than one factor, which could include interaction with more than one type of polymer in the fibers, such as cellulose and hemicellulose or pectin. Binding to different polysaccharides could explain the observed reduction of cellulolytic and xylanolytic activities in the presence of expansin, possibly because of competition for the substrate. Our findings are relevant for the comprehensive understanding of the pathogenesis by P. carotovorum during xylem invasion, a process in which Exl1 might be involved.
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Affiliation(s)
- Omar E. Tovar-Herrera
- Departamento
de Ingeniería Celular y Biocatálisis,
Instituto de Biotecnología, and Laboratorio Nacional de Microscopía
Avanzada, Instituto de Biotecnología, Universidad Nacional Autónoma de México, Av. Universidad 2001, Chamilpa, 62210 Cuernavaca, Mexico
| | - Mabel Rodríguez
- Departamento
de Ingeniería Celular y Biocatálisis,
Instituto de Biotecnología, and Laboratorio Nacional de Microscopía
Avanzada, Instituto de Biotecnología, Universidad Nacional Autónoma de México, Av. Universidad 2001, Chamilpa, 62210 Cuernavaca, Mexico
- Centro
de Investigación en Dinámica Celular-IICBA, Universidad
Autónoma del Estado de Morelos, Av. Universidad 1001, Chamilpa, 62209 Cuernavaca, Mexico
| | - Miguel Olarte-Lozano
- Departamento
de Ingeniería Celular y Biocatálisis,
Instituto de Biotecnología, and Laboratorio Nacional de Microscopía
Avanzada, Instituto de Biotecnología, Universidad Nacional Autónoma de México, Av. Universidad 2001, Chamilpa, 62210 Cuernavaca, Mexico
| | - Jimmy Andrés Sampedro-Guerrero
- Departamento
de Ingeniería Celular y Biocatálisis,
Instituto de Biotecnología, and Laboratorio Nacional de Microscopía
Avanzada, Instituto de Biotecnología, Universidad Nacional Autónoma de México, Av. Universidad 2001, Chamilpa, 62210 Cuernavaca, Mexico
| | - Adán Guerrero
- Departamento
de Ingeniería Celular y Biocatálisis,
Instituto de Biotecnología, and Laboratorio Nacional de Microscopía
Avanzada, Instituto de Biotecnología, Universidad Nacional Autónoma de México, Av. Universidad 2001, Chamilpa, 62210 Cuernavaca, Mexico
| | - Raúl Pinto-Cámara
- Departamento
de Ingeniería Celular y Biocatálisis,
Instituto de Biotecnología, and Laboratorio Nacional de Microscopía
Avanzada, Instituto de Biotecnología, Universidad Nacional Autónoma de México, Av. Universidad 2001, Chamilpa, 62210 Cuernavaca, Mexico
| | - Xóchitl Alvarado-Affantranger
- Departamento
de Ingeniería Celular y Biocatálisis,
Instituto de Biotecnología, and Laboratorio Nacional de Microscopía
Avanzada, Instituto de Biotecnología, Universidad Nacional Autónoma de México, Av. Universidad 2001, Chamilpa, 62210 Cuernavaca, Mexico
| | - Christopher D. Wood
- Departamento
de Ingeniería Celular y Biocatálisis,
Instituto de Biotecnología, and Laboratorio Nacional de Microscopía
Avanzada, Instituto de Biotecnología, Universidad Nacional Autónoma de México, Av. Universidad 2001, Chamilpa, 62210 Cuernavaca, Mexico
| | - Jose M. Moran-Mirabal
- Department
of Chemistry and Chemical Biology, McMaster
University, 1280 Main Street West, Hamilton, Ontario, L8S 4M1, Canada
| | - Nina Pastor
- Centro
de Investigación en Dinámica Celular-IICBA, Universidad
Autónoma del Estado de Morelos, Av. Universidad 1001, Chamilpa, 62209 Cuernavaca, Mexico
| | - Lorenzo Segovia
- Departamento
de Ingeniería Celular y Biocatálisis,
Instituto de Biotecnología, and Laboratorio Nacional de Microscopía
Avanzada, Instituto de Biotecnología, Universidad Nacional Autónoma de México, Av. Universidad 2001, Chamilpa, 62210 Cuernavaca, Mexico
| | - Claudia Martínez-Anaya
- Departamento
de Ingeniería Celular y Biocatálisis,
Instituto de Biotecnología, and Laboratorio Nacional de Microscopía
Avanzada, Instituto de Biotecnología, Universidad Nacional Autónoma de México, Av. Universidad 2001, Chamilpa, 62210 Cuernavaca, Mexico
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11
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Ye G, Zeng D, Zhang S, Fan M, Zhang H, Xie J. Ethanol production from mixtures of sugarcane bagasse and Dioscorea composita extracted residue with high solid loading. BIORESOURCE TECHNOLOGY 2018; 257:23-29. [PMID: 29482162 DOI: 10.1016/j.biortech.2018.02.008] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/11/2017] [Revised: 01/31/2018] [Accepted: 02/01/2018] [Indexed: 06/08/2023]
Abstract
Various mixing ratios of alkali pretreated sugarcane bagasse and starch-rich waste Dioscorea composita hemls extracted residue (DER) were evaluated via simultaneous saccharification and fermentation (SSF) with 12% (w/w) solid loading, and the mixture ratio of 1:1 achieved the highest ethanol concentration and yield. When the solid loading was increased from 12% to 32%, the ethanol concentration was increased to 72.04 g/L, whereas the ethanol yield was reduced from 84.40% to 73.71%. With batch feeding and the addition of 0.1% (w/v) Tween 80, the final ethanol concentration and yield of SSF at 34% loading were 82.83 g/L and 77.22%, respectively. Due to the integration with existing starch-based ethanol industry, the co-fermentation is expected to be a competitive alternative form for cellulosic ethanol production.
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Affiliation(s)
- Guangying Ye
- College of Forestry and Landscape Architecture, Guangdong Engineering Technology Research Center of Agricultural and Forestry Biomass, Key Laboratory of Energy Plants Resource and Utilization, Ministry of Agriculture, South China Agricultural University, Guangzhou 510642, PR China
| | - Defu Zeng
- College of Forestry and Landscape Architecture, Guangdong Engineering Technology Research Center of Agricultural and Forestry Biomass, Key Laboratory of Energy Plants Resource and Utilization, Ministry of Agriculture, South China Agricultural University, Guangzhou 510642, PR China
| | - Shuaishuai Zhang
- College of Forestry and Landscape Architecture, Guangdong Engineering Technology Research Center of Agricultural and Forestry Biomass, Key Laboratory of Energy Plants Resource and Utilization, Ministry of Agriculture, South China Agricultural University, Guangzhou 510642, PR China
| | - Meishan Fan
- College of Forestry and Landscape Architecture, Guangdong Engineering Technology Research Center of Agricultural and Forestry Biomass, Key Laboratory of Energy Plants Resource and Utilization, Ministry of Agriculture, South China Agricultural University, Guangzhou 510642, PR China
| | - Hongdan Zhang
- College of Forestry and Landscape Architecture, Guangdong Engineering Technology Research Center of Agricultural and Forestry Biomass, Key Laboratory of Energy Plants Resource and Utilization, Ministry of Agriculture, South China Agricultural University, Guangzhou 510642, PR China.
| | - Jun Xie
- College of Forestry and Landscape Architecture, Guangdong Engineering Technology Research Center of Agricultural and Forestry Biomass, Key Laboratory of Energy Plants Resource and Utilization, Ministry of Agriculture, South China Agricultural University, Guangzhou 510642, PR China.
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12
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Orłowski A, Artzi L, Cazade PA, Gunnoo M, Bayer EA, Thompson D. On the distinct binding modes of expansin and carbohydrate-binding module proteins on crystalline and nanofibrous cellulose: implications for cellulose degradation by designer cellulosomes. Phys Chem Chem Phys 2018. [DOI: 10.1039/c7cp07764e] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Transformation of cellulose into monosaccharides can be achieved by hydrolysis of the cellulose chains, carried out by a special group of enzymes known as cellulases.
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Affiliation(s)
- Adam Orłowski
- Department of Physics
- Bernal Institute
- University of Limerick
- Ireland
| | - Lior Artzi
- Department of Biomolecular Sciences
- The Weizmann Institute of Science
- Rehovot
- Israel
| | | | | | - Edward A. Bayer
- Department of Biomolecular Sciences
- The Weizmann Institute of Science
- Rehovot
- Israel
| | - Damien Thompson
- Department of Physics
- Bernal Institute
- University of Limerick
- Ireland
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13
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Do TH, Dao TK, Nguyen KHV, Le NG, Nguyen TMP, Le TL, Phung TN, van Straalen NM, Roelofs D, Truong NH. Metagenomic analysis of bacterial community structure and diversity of lignocellulolytic bacteria in Vietnamese native goat rumen. ASIAN-AUSTRALASIAN JOURNAL OF ANIMAL SCIENCES 2017; 31:738-747. [PMID: 28920414 PMCID: PMC5930285 DOI: 10.5713/ajas.17.0174] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/03/2017] [Revised: 06/15/2017] [Accepted: 09/04/2017] [Indexed: 12/14/2022]
Abstract
Objective In a previous study, analysis of Illumina sequenced metagenomic DNA data of bacteria in Vietnamese goats’ rumen showed a high diversity of putative lignocellulolytic genes. In this study, taxonomy speculation of microbial community and lignocellulolytic bacteria population in the rumen was conducted to elucidate a role of bacterial structure for effective degradation of plant materials. Methods The metagenomic data had been subjected into Basic Local Alignment Search Tool (BLASTX) algorithm and the National Center for Biotechnology Information non-redundant sequence database. Here the BLASTX hits were further processed by the Metagenome Analyzer program to statistically analyze the abundance of taxa. Results Microbial community in the rumen is defined by dominance of Bacteroidetes compared to Firmicutes. The ratio of Firmicutes versus Bacteroidetes was 0.36:1. An abundance of Synergistetes was uniquely identified in the goat microbiome may be formed by host genotype. With regard to bacterial lignocellulose degraders, the ratio of lignocellulolytic genes affiliated with Firmicutes compared to the genes linked to Bacteroidetes was 0.11:1, in which the genes encoding putative hemicellulases, carbohydrate esterases, polysaccharide lyases originated from Bacteroidetes were 14 to 20 times higher than from Firmicutes. Firmicutes seem to possess more cellulose hydrolysis capacity showing a Firmicutes/Bacteroidetes ratio of 0.35:1. Analysis of lignocellulolytic potential degraders shows that four species belonged to Bacteroidetes phylum, while two species belonged to Firmicutes phylum harbouring at least 12 different catalytic domains for all lignocellulose pretreatment, cellulose, as well as hemicellulose saccharification. Conclusion Based on these findings, we speculate that increasing the members of Bacteroidetes to keep a low ratio of Firmicutes versus Bacteroidetes in goat rumen has resulted most likely in an increased lignocellulose digestion.
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Affiliation(s)
- Thi Huyen Do
- Institute of Biotechnology, Vietnam Academy of Science and Technology, Cau Giay, Ha Noi 100000, Vietnam
| | - Trong Khoa Dao
- Institute of Biotechnology, Vietnam Academy of Science and Technology, Cau Giay, Ha Noi 100000, Vietnam.,Graduate University of Science and Technology, Vietnam Academy of Science and Technology, Cau Giay, Ha Noi 100000, Vietnam
| | - Khanh Hoang Viet Nguyen
- Graduate University of Science and Technology, Vietnam Academy of Science and Technology, Cau Giay, Ha Noi 100000, Vietnam.,Institute of New Technology, Academy of Military Science and Technology, Cau Giay, Hanoi 100000, Vietnam
| | - Ngoc Giang Le
- Institute of Biotechnology, Vietnam Academy of Science and Technology, Cau Giay, Ha Noi 100000, Vietnam.,Department of Ecological Science, Vrije Universiteit Amsterdam, De Boelelaan 1085, Amsterdam 1081 HV, The Netherlands
| | - Thi Mai Phuong Nguyen
- Institute of Biotechnology, Vietnam Academy of Science and Technology, Cau Giay, Ha Noi 100000, Vietnam
| | - Tung Lam Le
- Institute of Biotechnology, Vietnam Academy of Science and Technology, Cau Giay, Ha Noi 100000, Vietnam
| | - Thu Nguyet Phung
- Institute of Biotechnology, Vietnam Academy of Science and Technology, Cau Giay, Ha Noi 100000, Vietnam
| | - Nico M van Straalen
- Department of Ecological Science, Vrije Universiteit Amsterdam, De Boelelaan 1085, Amsterdam 1081 HV, The Netherlands
| | - Dick Roelofs
- Department of Ecological Science, Vrije Universiteit Amsterdam, De Boelelaan 1085, Amsterdam 1081 HV, The Netherlands
| | - Nam Hai Truong
- Institute of Biotechnology, Vietnam Academy of Science and Technology, Cau Giay, Ha Noi 100000, Vietnam
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Affiliation(s)
- Daniel J. Cosgrove
- Department of Biology, Pennsylvania State University, University Park, Pennsylvania 16802
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15
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Perini MA, Sin IN, Martinez GA, Civello PM. Measurement of expansin activity and plant cell wall creep by using a commercial texture analyzer. ELECTRON J BIOTECHN 2017. [DOI: 10.1016/j.ejbt.2016.12.003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022] Open
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Martinez-Anaya C. Understanding the structure and function of bacterial expansins: a prerequisite towards practical applications for the bioenergy and agricultural industries. Microb Biotechnol 2016; 9:727-736. [PMID: 27365165 PMCID: PMC5072189 DOI: 10.1111/1751-7915.12377] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2016] [Revised: 06/06/2016] [Accepted: 06/09/2016] [Indexed: 01/03/2023] Open
Abstract
Since the publication of a landmark article on the structure of EXLX1 from Bacillus subtilis in 2011, our knowledge of bacterial expansins has steadily increased and our view and understanding of these enigmatic proteins has advanced with relation to their structure, phylogenetic relationships and substrate interaction, although the molecular basis for their mechanism of action remains to be determined. Lignocellulosic material represents a source of fermentable sugars for the production of biofuels, and cell‐wall degrading activities are essential to efficiently release such sugars from their polymeric structures. Because expansins from fungi and bacteria seem to be required to properly colonize or cause disease to plant tissues, and because they share some characteristics with their plant counterparts for loosening the cell wall they have been seen as a promising tool to overcome the recalcitrance of these materials. However, microbial expansins activity is at best, very low compared with plant expansins activity. This revision analyses recent work on bacterial expansins structure, function and biological role, emphasizing our need to focus on their mechanism of action as a means to design better strategies for their use, in both in the energy and agricultural industries.
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Affiliation(s)
- Claudia Martinez-Anaya
- Departamento de Ingeniería Celular y Biocatálisis, Instituto de Biotecnología, Universidad Nacional Autónoma de México, Av. Universidad 2001, Chamilpa, Cuernavaca, 62210, Morelos, México.
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