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Martins M, Tramontina R, Squina FM, Dinamarco TM, Goldbeck R. Synergism for xylo-oligosaccharides, ρ-coumaric and ferulic acid production, and thermostability modulation of GH 62 α-l-arabinofuranosidase. BIOCATALYSIS AND AGRICULTURAL BIOTECHNOLOGY 2022. [DOI: 10.1016/j.bcab.2022.102469] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
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Long L, Sun L, Liu Z, Lin Q, Wang J, Ding S. Functional characterization of a GH62 family α-L-arabinofuranosidase from Eupenicillium parvum suitable for monosaccharification of corncob arabinoxylan in combination with key enzymes. Enzyme Microb Technol 2021; 154:109965. [PMID: 34933174 DOI: 10.1016/j.enzmictec.2021.109965] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2021] [Revised: 11/20/2021] [Accepted: 12/06/2021] [Indexed: 11/30/2022]
Abstract
Corncob rich in arabinoxylan is an important raw material widely used in bio-refinery. Complete saccharification of arabinoxylan depends on the synergism of different enzymes including α-L-arabinofuranosidase (ABF). This study aimed to investigate the functional characteristics of a new ABF EpABF62A belonging to glycoside hydrolase (GH) 62 family from the fungus Eupenicillium parvum, and to explore its potential in the saccharification of corncob arabinoxylan. The recombinant EpABF62A showed high activity against wheat arabinoxylan and rye arabinoxylan, with the optimal temperature of 55 °C and pH of 4.5. The protein contains an N-terminal cellulose-binding domain family 1 (CBM_1) domain, and displayed a 59.5% absorption rate to phosphoric acid swollen cellulose. Regioselectivity analysis indicated that the enzyme selectively removed α-1,2 or α-1,3 linked arabinofuranosyl residues on mono-substituted xylose residues on arabinoxylan. Corncob arabinoxylans (CAX1 or CAX2) with different (low or high) branching degrees were extracted from the raw material by alkaline hydrogen peroxide pretreatment and graded ethanol precipitation. Single EpABF62A removed 69.5% or 67.1% arabinose from CAX1 or CAX2, respectively. EpABF62A combined with a GH10 xylanase, a GH43 β-D-xylosidase and a GH67 α-glucuronidase released 75.0% or 64.5% xylose from CAX1 or CAX2, respectively. The addition of the four hemicellulases enhanced the saccharification the solid fraction of the pretreated corncob by the commercial cellulase Cellic® CTec2, and the conversion ratios of glucose, xylose and arabinose were up to 94.0%, 91.8% and 82.6%, respectively.
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Affiliation(s)
- Liangkun Long
- Jiangsu Co-Innovation Center for Efficient Processing and Utilization of Forest Resources, College of Chemical Engineering, Nanjing Forestry University, Nanjing 210037, China; Jiangsu Key Lab for the Chemistry & Utilization of Agricultural and Forest Biomass, Nanjing 210037, China
| | - Lu Sun
- Jiangsu Co-Innovation Center for Efficient Processing and Utilization of Forest Resources, College of Chemical Engineering, Nanjing Forestry University, Nanjing 210037, China
| | - Zhen Liu
- Jiangsu Co-Innovation Center for Efficient Processing and Utilization of Forest Resources, College of Chemical Engineering, Nanjing Forestry University, Nanjing 210037, China
| | - Qunying Lin
- Nanjing Institute for the Comprehensive Utilization of Wild Plants, Nanjing 211111, China
| | - Jing Wang
- Jiangsu Co-Innovation Center for Efficient Processing and Utilization of Forest Resources, College of Chemical Engineering, Nanjing Forestry University, Nanjing 210037, China
| | - Shaojun Ding
- Jiangsu Co-Innovation Center for Efficient Processing and Utilization of Forest Resources, College of Chemical Engineering, Nanjing Forestry University, Nanjing 210037, China; Jiangsu Key Lab for the Chemistry & Utilization of Agricultural and Forest Biomass, Nanjing 210037, China.
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Maruyama R, Mayuzumi Y, Morisawa J, Kawai S. Transgenic rice plants expressing the α-L-arabinofuranosidase of Coprinopsis cinerea exhibit strong dwarfism and markedly enhanced tillering. PLANT BIOTECHNOLOGY (TOKYO, JAPAN) 2021; 38:379-386. [PMID: 34782826 PMCID: PMC8562574 DOI: 10.5511/plantbiotechnology.21.0616a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/14/2021] [Accepted: 06/16/2021] [Indexed: 06/13/2023]
Abstract
Lignocellulosic materials are potential renewable sources of fermentable sugars for bioethanol production. In this study, we used the CcAbf62A gene encoding CcAbf62A, a putative extracellular α-L-arabinofuranosidase, cloned from the mycotrophic basidiomycete Coprinopsis cinerea. CcAbf62A acts on arabinoxylan, the major hemicellulose of grasses, releasing arabinose. CcAbf62A was introduced into rice with the aim of enhancing delignification efficiency and the availability of lignocellulosic materials without reducing lignin content. Among the 32 lines of regenerated transgenic rice, 13 exhibited markedly disrupted elongation growth and excessive tillering (dwarf), seven showed delayed elongation growth (retarded-growth), and 12 showed phenotypes similar to those of control plants (normal). Additionally, the dwarf lines showed reduced acclimation. RT-PCR analysis revealed that dwarf lines had higher levels of CcAbf62A expression than retarded-growth and normal lines. Although the lignin content of transgenic rice plants expressing CcAbf62A did not differ significantly from that of control rice plants, dwarf lines were characterized by delayed deposition of lignin in the culms compared with the controls. The reduced acclimation ability of dwarf lines is believed to be associated with increased water loss and reduced water conductivity concomitant with delayed lignin deposition. Contrary to expectations, the alkaline delignification rates of dwarf and retarded-growth Abf lines were slightly lower than those of control rice plants. Our findings indicate that CcAbf62A reduces ferulate-lignin cross-links by detaching arabinose side chains from arabinoxylan and increases the relative abundance of alkaline-resistant benzyl ether cross-links. CcAbf62A is anticipated to provide new approaches for breeding plants containing altered lignocellulosic materials or lodging-resistant crops.
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Affiliation(s)
- Ryo Maruyama
- United Graduate School of Agricultural Science, Tokyo University of Agriculture and Technology, Fuchu, Tokyo 183-8509, Japan
| | - Yasuyoshi Mayuzumi
- United Graduate School of Agricultural Science, Tokyo University of Agriculture and Technology, Fuchu, Tokyo 183-8509, Japan
| | - Jun Morisawa
- Graduate School of Agriculture, Tokyo University of Agriculture and Technology, Fuchu, Tokyo 183-8509, Japan
| | - Shinya Kawai
- United Graduate School of Agricultural Science, Tokyo University of Agriculture and Technology, Fuchu, Tokyo 183-8509, Japan
- Graduate School of Agriculture, Tokyo University of Agriculture and Technology, Fuchu, Tokyo 183-8509, Japan
- Gene Research Center, Tokyo University of Agriculture and Technology, Fuchu, Tokyo 183-8509, Japan
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Yan R, Wang W, Vuong TV, Xiu Y, Skarina T, Di Leo R, Gatenholm P, Toriz G, Tenkanen M, Stogios PJ, Master ER. Structural characterization of the family GH115 α-glucuronidase from Amphibacillus xylanus yields insight into its coordinated action with α-arabinofuranosidases. N Biotechnol 2021; 62:49-56. [PMID: 33486119 DOI: 10.1016/j.nbt.2021.01.005] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2020] [Revised: 01/11/2021] [Accepted: 01/16/2021] [Indexed: 01/01/2023]
Abstract
The coordinated action of carbohydrate-active enzymes has mainly been evaluated for the purpose of complete saccharification of plant biomass (lignocellulose) to sugars. By contrast, the coordinated action of accessory hemicellulases on xylan debranching and recovery is less well characterized. Here, the activity of two family GH115 α-glucuronidases (SdeAgu115A from Saccharophagus degradans, and AxyAgu115A from Amphibacillus xylanus) on spruce arabinoglucuronoxylan (AGX) was evaluated in combination with an α-arabinofuranosidase from families GH51 (AniAbf51A, aka E-AFASE from Aspergillus niger) and GH62 (SthAbf62A from Streptomyces thermoviolaceus). The α-arabinofuranosidases boosted (methyl)-glucuronic acid release by SdeAgu115A by approximately 50 % and 30 %, respectively. The impact of the α-arabinofuranosidases on AxyAgu115A activity was comparatively low, motivating its structural characterization. The crystal structure of AxyAgu115A revealed increased length and flexibility of the active site loop compared to SdeAgu115A. This structural difference could explain the ability of AxyAgu115A to accommodate more highly substituted arabinoglucuronoxylan, and inform enzyme selections for improved AGX recovery and use.
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Affiliation(s)
- Ruoyu Yan
- Department of Chemical Engineering and Applied Chemistry, University of Toronto, 200 College Street, Toronto, Ontario, M5S 3E5, Canada
| | - Weijun Wang
- Department of Chemical Engineering and Applied Chemistry, University of Toronto, 200 College Street, Toronto, Ontario, M5S 3E5, Canada
| | - Thu V Vuong
- Department of Chemical Engineering and Applied Chemistry, University of Toronto, 200 College Street, Toronto, Ontario, M5S 3E5, Canada
| | - Yang Xiu
- Department of Chemical Engineering and Applied Chemistry, University of Toronto, 200 College Street, Toronto, Ontario, M5S 3E5, Canada
| | - Tatiana Skarina
- Department of Chemical Engineering and Applied Chemistry, University of Toronto, 200 College Street, Toronto, Ontario, M5S 3E5, Canada
| | - Rosa Di Leo
- Department of Chemical Engineering and Applied Chemistry, University of Toronto, 200 College Street, Toronto, Ontario, M5S 3E5, Canada
| | - Paul Gatenholm
- Department of Chemistry and Chemical Engineering, Wallenberg Wood Science Center and Biopolymer Technology, Chalmers University of Technology, Kemivägen 4, Gothenburg, 412 96, Sweden
| | - Guillermo Toriz
- Department of Wood, Cellulose and Paper Research, University of Guadalajara, Guadalajara, 44100, Mexico
| | - Maija Tenkanen
- Department of Food and Environmental Sciences, University of Helsinki, P.O. Box 27, Helsinki, 00014, Finland
| | - Peter J Stogios
- Department of Chemical Engineering and Applied Chemistry, University of Toronto, 200 College Street, Toronto, Ontario, M5S 3E5, Canada
| | - Emma R Master
- Department of Chemical Engineering and Applied Chemistry, University of Toronto, 200 College Street, Toronto, Ontario, M5S 3E5, Canada; Department of Bioproducts and Biosystems, Aalto University, FI-00076, Aalto, Kemistintie 1, Espoo, Finland.
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Functional and structural characterization of an α-ʟ-arabinofuranosidase from Thermothielavioides terrestris and its exquisite domain-swapped β-propeller fold crystal packing. BIOCHIMICA ET BIOPHYSICA ACTA-PROTEINS AND PROTEOMICS 2020; 1868:140533. [DOI: 10.1016/j.bbapap.2020.140533] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/19/2020] [Revised: 07/25/2020] [Accepted: 08/12/2020] [Indexed: 12/24/2022]
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Lim JJJ, Koh J, Moo JR, Villanueva EMF, Putri DA, Lim YS, Seetoh WS, Mulupuri S, Ng JWZ, Nguyen NLU, Reji R, Foo H, Zhao MX, Chan TL, Rodrigues EE, Kairon RS, Hee KM, Chee NC, Low AD, Chen ZHX, Lim SC, Lunardi V, Fong TC, Chua CX, Koh KTS, Julca I, Delli-Ponti R, Ng JWX, Mutwil M. Fungi.guru: Comparative genomic and transcriptomic resource for the fungi kingdom. Comput Struct Biotechnol J 2020; 18:3788-3795. [PMID: 33304470 PMCID: PMC7718472 DOI: 10.1016/j.csbj.2020.11.019] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2020] [Revised: 11/10/2020] [Accepted: 11/10/2020] [Indexed: 12/30/2022] Open
Abstract
The fungi kingdom is composed of eukaryotic heterotrophs, which are responsible for balancing the ecosystem and play a major role as decomposers. They also produce a vast diversity of secondary metabolites, which have antibiotic or pharmacological properties. However, our lack of knowledge of gene function in fungi precludes us from tailoring them to our needs and tapping into their metabolic diversity. To help remedy this, we gathered genomic and gene expression data of 19 most widely-researched fungi to build an online tool, fungi.guru, which contains tools for cross-species identification of conserved pathways, functional gene modules, and gene families. We exemplify how our tool can elucidate the molecular function, biological process and cellular component of genes involved in various biological processes, by identifying a secondary metabolite pathway producing gliotoxin in Aspergillus fumigatus, the catabolic pathway of cellulose in Coprinopsis cinerea and the conserved DNA replication pathway in Fusarium graminearum and Pyricularia oryzae. The tool is available at www.fungi.guru.
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Affiliation(s)
- Jolyn Jia Jia Lim
- School of Biological Sciences, Nanyang Technological University, 60 Nanyang Drive, Singapore 637551, Singapore
| | - Jace Koh
- School of Biological Sciences, Nanyang Technological University, 60 Nanyang Drive, Singapore 637551, Singapore
| | - Jia Rong Moo
- School of Biological Sciences, Nanyang Technological University, 60 Nanyang Drive, Singapore 637551, Singapore
| | | | - Dhira Anindya Putri
- School of Biological Sciences, Nanyang Technological University, 60 Nanyang Drive, Singapore 637551, Singapore
| | - Yuen Shan Lim
- School of Biological Sciences, Nanyang Technological University, 60 Nanyang Drive, Singapore 637551, Singapore
| | - Wei Song Seetoh
- School of Biological Sciences, Nanyang Technological University, 60 Nanyang Drive, Singapore 637551, Singapore
| | - Sriya Mulupuri
- School of Biological Sciences, Nanyang Technological University, 60 Nanyang Drive, Singapore 637551, Singapore
| | - Janice Wan Zhen Ng
- School of Biological Sciences, Nanyang Technological University, 60 Nanyang Drive, Singapore 637551, Singapore
| | - Nhi Le Uyen Nguyen
- School of Biological Sciences, Nanyang Technological University, 60 Nanyang Drive, Singapore 637551, Singapore
| | - Rinta Reji
- School of Biological Sciences, Nanyang Technological University, 60 Nanyang Drive, Singapore 637551, Singapore
| | - Herman Foo
- School of Biological Sciences, Nanyang Technological University, 60 Nanyang Drive, Singapore 637551, Singapore
| | - Margaret Xuan Zhao
- College of Medicine and Veterinary Medicine, University of Edinburgh, Old College, South Bridge, Edinburgh EH8 9YL, United Kingdom
| | - Tong Ling Chan
- School of Biological Sciences, Nanyang Technological University, 60 Nanyang Drive, Singapore 637551, Singapore
| | - Edbert Edric Rodrigues
- School of Biological Sciences, Nanyang Technological University, 60 Nanyang Drive, Singapore 637551, Singapore
| | - Ryanjit Singh Kairon
- School of Biological Sciences, Nanyang Technological University, 60 Nanyang Drive, Singapore 637551, Singapore
| | - Ker Min Hee
- School of Biological Sciences, Nanyang Technological University, 60 Nanyang Drive, Singapore 637551, Singapore
| | - Natasha Cassandra Chee
- School of Biological Sciences, Nanyang Technological University, 60 Nanyang Drive, Singapore 637551, Singapore
| | - Ann Don Low
- School of Biological Sciences, Nanyang Technological University, 60 Nanyang Drive, Singapore 637551, Singapore
| | - Zoe Hui Xin Chen
- School of Biological Sciences, Nanyang Technological University, 60 Nanyang Drive, Singapore 637551, Singapore
| | - Shan Chun Lim
- School of Biological Sciences, Nanyang Technological University, 60 Nanyang Drive, Singapore 637551, Singapore
| | - Vanessa Lunardi
- School of Biological Sciences, Nanyang Technological University, 60 Nanyang Drive, Singapore 637551, Singapore
| | - Tuck Choy Fong
- School of Biological Sciences, Nanyang Technological University, 60 Nanyang Drive, Singapore 637551, Singapore
| | - Cherlyn Xin'Er Chua
- School of Biological Sciences, Nanyang Technological University, 60 Nanyang Drive, Singapore 637551, Singapore
| | - Kenny Ting Sween Koh
- School of Biological Sciences, Nanyang Technological University, 60 Nanyang Drive, Singapore 637551, Singapore
| | - Irene Julca
- School of Biological Sciences, Nanyang Technological University, 60 Nanyang Drive, Singapore 637551, Singapore
| | - Riccardo Delli-Ponti
- School of Biological Sciences, Nanyang Technological University, 60 Nanyang Drive, Singapore 637551, Singapore
| | - Jonathan Wei Xiong Ng
- School of Biological Sciences, Nanyang Technological University, 60 Nanyang Drive, Singapore 637551, Singapore
| | - Marek Mutwil
- School of Biological Sciences, Nanyang Technological University, 60 Nanyang Drive, Singapore 637551, Singapore
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Poria V, Saini JK, Singh S, Nain L, Kuhad RC. Arabinofuranosidases: Characteristics, microbial production, and potential in waste valorization and industrial applications. BIORESOURCE TECHNOLOGY 2020; 304:123019. [PMID: 32089440 DOI: 10.1016/j.biortech.2020.123019] [Citation(s) in RCA: 36] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/30/2019] [Revised: 02/09/2020] [Accepted: 02/11/2020] [Indexed: 05/15/2023]
Abstract
Alpha-L-arabinofuranoside arabinofuranohydrolase (ARA), more commonly known as alpha-L-arabinofuranosidase (E.C. number 3.2.1.55), is a hydrolytic enzyme, catalyzing the cleavage of alpha-L-arabinose by acting on the non-reducing ends of alpha-L-arabinofuranosides, alpha-L-arabinans containing (1,3)- and/or (1,5)-linked arabinoxylans and arabinogalactans. ARA functions as debranching enzyme removing arabinose substituents from arabinoxylan and arabinoxylooligomers, thereby, boosting the hydrolysis of arabinoxylan fraction of hemicellulose and improving bioconversion of lignocellulosic biomass. Previously, comprehensive information on this enzyme has not been reviewed thoroughly. Therefore, the main aim of this review is to highlight the important properties of this interesting enzyme, microorganisms used for its production, and enhanced production using genetic engineering approach. An account on synergism with other biomass hydrolyzing enzymes and various industrial applications of this enzyme has also been provided along with an outlook on further research and development.
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Affiliation(s)
- Vikram Poria
- Department of Microbiology, Central University of Haryana, Mahendergarh, Haryana PIN-123031, India
| | - Jitendra Kumar Saini
- Department of Microbiology, Central University of Haryana, Mahendergarh, Haryana PIN-123031, India
| | - Surender Singh
- Department of Microbiology, Central University of Haryana, Mahendergarh, Haryana PIN-123031, India; Division of Microbiology, Indian Agricultural Research Institute, New Delhi PIN-110012, India.
| | - Lata Nain
- Division of Microbiology, Indian Agricultural Research Institute, New Delhi PIN-110012, India
| | - Ramesh Chander Kuhad
- Central University of Haryana, Mahendergarh, Haryana PIN-123031, India; Lignocellulose Biotechnology Laboratory, Department of Microbiology, University of Delhi South Campus, New Delhi PIN-110021, India
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Tu T, Li X, Meng K, Bai Y, Wang Y, Wang Z, Yao B, Luo H. A GH51 α-L-arabinofuranosidase from Talaromyces leycettanus strain JCM12802 that selectively drives synergistic lignocellulose hydrolysis. Microb Cell Fact 2019; 18:138. [PMID: 31426823 PMCID: PMC6699109 DOI: 10.1186/s12934-019-1192-z] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2019] [Accepted: 08/10/2019] [Indexed: 12/29/2022] Open
Abstract
Background The development of sustainable technologies for plant cell wall degradation greatly depends on enzymes with hydrolytic activities against carbohydrates. The waste by-products of agricultural cereals are important biomass sources because they contain large amounts of saccharides. Achieving efficient debranching and depolymerization are two important objectives for increasing the utilization of such renewable bioresources. GH51 α-l-arabinofuranosidases are important in biomass pretreatment because they act synergistically with other enzymes during hemicellulose hydrolysis. Results A GH51 α-l-arabinofuranosidase from Talaromyces leycettanus JCM12802 was heterologously expressed in Pichia pastoris GS115 and characterized. The recombinant α-l-arabinofuranosidase, TlAbf51, showed an optimum temperature and pH of 55–60 °C and 3.5–4.0, respectively, and remained stable at 50 °C and pH 3.0–9.0. TlAbf51 showed a higher catalytic efficiency (5712 mM−1 s−1) than most fungal α-l-arabinofuranosidases towards the substrate 4-nitrophenyl-α-l-arabinofuranoside. Moreover, TlAbf51 preferentially removed 1,2- or 1,3-linked arabinofuranose residues from arabinoxylan and acted synergistically with the bifunctional xylanase/cellulase TcXyn10A at an activity ratio of 5:1. The highest yields of arabinose and xylooligosaccharides were obtained when TlAbf51 was added after TcXyn10A or when both enzymes were added simultaneously. High-performance anion-exchange chromatography analyses showed that (i) arabinose and xylooligosaccharides with low degrees of polymerization (DP1–DP5) and (ii) arabinose and xylooligosaccharides (DP1–DP3) were the major hydrolysates obtained during the hydrolysis of sodium hydroxide-pretreated cornstalk and corn bran, respectively. Conclusions In contrast to other fungal GH51 α-l-arabinofuranosidases, recombinant TlAbf51 showed excellent stability over a broad pH range and high catalytic efficiency. Moreover, TlAbf51 acted synergistically with another hemicellulase to digest arabino-polysaccharides. These favorable enzymatic properties make TlAbf51 attractive for biomass pretreatment and biofuel production. Electronic supplementary material The online version of this article (10.1186/s12934-019-1192-z) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Tao Tu
- Key Laboratory for Feed Biotechnology of the Ministry of Agriculture, Feed Research Institute, Chinese Academy of Agricultural Sciences, No. 12 Zhongguancun South Street, Beijing, 100081, People's Republic of China.
| | - Xiaoli Li
- Key Laboratory for Feed Biotechnology of the Ministry of Agriculture, Feed Research Institute, Chinese Academy of Agricultural Sciences, No. 12 Zhongguancun South Street, Beijing, 100081, People's Republic of China
| | - Kun Meng
- Key Laboratory for Feed Biotechnology of the Ministry of Agriculture, Feed Research Institute, Chinese Academy of Agricultural Sciences, No. 12 Zhongguancun South Street, Beijing, 100081, People's Republic of China
| | - Yingguo Bai
- Key Laboratory for Feed Biotechnology of the Ministry of Agriculture, Feed Research Institute, Chinese Academy of Agricultural Sciences, No. 12 Zhongguancun South Street, Beijing, 100081, People's Republic of China
| | - Yuan Wang
- Key Laboratory for Feed Biotechnology of the Ministry of Agriculture, Feed Research Institute, Chinese Academy of Agricultural Sciences, No. 12 Zhongguancun South Street, Beijing, 100081, People's Republic of China
| | - Zhenxing Wang
- Key Laboratory for Feed Biotechnology of the Ministry of Agriculture, Feed Research Institute, Chinese Academy of Agricultural Sciences, No. 12 Zhongguancun South Street, Beijing, 100081, People's Republic of China
| | - Bin Yao
- Key Laboratory for Feed Biotechnology of the Ministry of Agriculture, Feed Research Institute, Chinese Academy of Agricultural Sciences, No. 12 Zhongguancun South Street, Beijing, 100081, People's Republic of China
| | - Huiying Luo
- Key Laboratory for Feed Biotechnology of the Ministry of Agriculture, Feed Research Institute, Chinese Academy of Agricultural Sciences, No. 12 Zhongguancun South Street, Beijing, 100081, People's Republic of China.
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Hu Y, Yan X, Zhang H, Liu J, Luo F, Cui Y, Wang W, Zhou Y. Cloning and expression of a novel α-1,3-arabinofuranosidase from Penicillium oxalicum sp. 68. AMB Express 2018; 8:51. [PMID: 29611040 PMCID: PMC5880795 DOI: 10.1186/s13568-018-0577-4] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2018] [Accepted: 03/24/2018] [Indexed: 01/11/2023] Open
Abstract
The discovery and creation of biocatalysts for plant biomass conversion are essential for industrial demand and scientific research of the plant cell wall. α-1,2 and α-1,3-L-arabinofuranosidases are debranching enzymes that catalyzing hydrolytic release of α-L-arabinofuranosyl residues in plant cell wall. Gene database analyses shows that GH62 family only contains specific α-L-arabinofuranosidases that play an important role in the degradation and structure of the plant cell wall. At present, there are only 22 enzymes in this group has been characterized. In this study, we cloned a novel α-1,3-arabinofuranosidase gene (poabf62a) belonging to glycoside hydrolase family 62 from Penicillium oxalicum sp. 68 and expressed it in Pichia pastoris. The molecular mass of recombinant PoAbf62A was estimated to be 32.9 kDa. Using p-nitrophenyl-α-l-arabinofuranoside (pNPαAbf) as substrate, purified PoAbf62A exhibited an optimal pH of 4.5 and temperature of 35 °C. Results of methylation and 13C NMR analyses showed that PoAbf62A was exclusively α-1,3-arabinofuranosidase, specific for cleavage of α-1,3-arabinofuranosyl residues, and with the absence of activity towards α-1,2-arabinofuranose and α-1,5-arabinofuranose. Therefore, PoAbf62A exhibits high activity on sugar beet arabinan and wheat arabinoxylan, because their branched side chain are decorated with α-1,3-arabinofuranose. On the other hand, there is a lack of activity with linear-α-L-1,5-arabinan and xylan that only contained α-L-1,5-arabinofuranose or β-1,4-xylose. The α-1,3-arabinofuranosidase activity identified here provides a new biocatalytic tool to degrade hemicellulose and analyze the structure of plant cell walls.
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GH62 arabinofuranosidases: Structure, function and applications. Biotechnol Adv 2017; 35:792-804. [DOI: 10.1016/j.biotechadv.2017.06.005] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2017] [Revised: 06/17/2017] [Accepted: 06/23/2017] [Indexed: 01/03/2023]
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Structure of the Catalytic Domain of α-l-Arabinofuranosidase from Coprinopsis cinerea, CcAbf62A, Provides Insights into Structure–Function Relationships in Glycoside Hydrolase Family 62. Appl Biochem Biotechnol 2016; 181:511-525. [DOI: 10.1007/s12010-016-2227-0] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2016] [Accepted: 08/26/2016] [Indexed: 10/21/2022]
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Wilkens C, Andersen S, Petersen BO, Li A, Busse-Wicher M, Birch J, Cockburn D, Nakai H, Christensen HEM, Kragelund BB, Dupree P, McCleary B, Hindsgaul O, Hachem MA, Svensson B. An efficient arabinoxylan-debranching α-l-arabinofuranosidase of family GH62 from Aspergillus nidulans contains a secondary carbohydrate binding site. Appl Microbiol Biotechnol 2016; 100:6265-6277. [DOI: 10.1007/s00253-016-7417-8] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2015] [Revised: 02/07/2016] [Accepted: 02/22/2016] [Indexed: 10/22/2022]
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Pérez R, Eyzaguirre J. Aspergillus fumigatus Produces Two Arabinofuranosidases From Glycosyl Hydrolase Family 62: Comparative Properties of the Recombinant Enzymes. Appl Biochem Biotechnol 2016; 179:143-54. [DOI: 10.1007/s12010-016-1984-0] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2015] [Accepted: 01/07/2016] [Indexed: 10/22/2022]
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Wang C, Dong D, Wang H, Müller K, Qin Y, Wang H, Wu W. Metagenomic analysis of microbial consortia enriched from compost: new insights into the role of Actinobacteria in lignocellulose decomposition. BIOTECHNOLOGY FOR BIOFUELS 2016; 9:22. [PMID: 26834834 PMCID: PMC4731972 DOI: 10.1186/s13068-016-0440-2] [Citation(s) in RCA: 155] [Impact Index Per Article: 19.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/10/2015] [Accepted: 01/14/2016] [Indexed: 05/18/2023]
Abstract
BACKGROUND Compost habitats sustain a vast ensemble of microbes specializing in the degradation of lignocellulosic plant materials and are thus important both for their roles in the global carbon cycle and as potential sources of biochemical catalysts for advanced biofuels production. Studies have revealed substantial diversity in compost microbiomes, yet how this diversity relates to functions and even to the genes encoding lignocellulolytic enzymes remains obscure. Here, we used a metagenomic analysis of the rice straw-adapted (RSA) microbial consortia enriched from compost ecosystems to decipher the systematic and functional contexts within such a distinctive microbiome. RESULTS Analyses of the 16S pyrotag library and 5 Gbp of metagenomic sequence showed that the phylum Actinobacteria was the predominant group among the Bacteria in the RSA consortia, followed by Proteobacteria, Firmicutes, Chloroflexi, and Bacteroidetes. The CAZymes profile revealed that CAZyme genes in the RSA consortia were also widely distributed within these bacterial phyla. Strikingly, about 46.1 % of CAZyme genes were from actinomycetal communities, which harbored a substantially expanded catalog of the cellobiohydrolase, β-glucosidase, acetyl xylan esterase, arabinofuranosidase, pectin lyase, and ligninase genes. Among these communities, a variety of previously unrecognized species was found, which reveals a greater ecological functional diversity of thermophilic Actinobacteria than previously assumed. CONCLUSION These data underline the pivotal role of thermophilic Actinobacteria in lignocellulose biodegradation processes in the compost habitat. Besides revealing a new benchmark for microbial enzymatic deconstruction of lignocelluloses, the results suggest that actinomycetes found in compost ecosystems are potential candidates for mining efficient lignocellulosic enzymes in the biofuel industry.
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Affiliation(s)
- Cheng Wang
- />Zhejiang Province Key Laboratory for Water Pollution Control and Environmental Safety Technology, Institute of Environmental Science and Technology, Zhejiang University, 866 Yuhangtang Road, Hangzhou, 310058 China
| | - Da Dong
- />Zhejiang Province Key Laboratory for Water Pollution Control and Environmental Safety Technology, Institute of Environmental Science and Technology, Zhejiang University, 866 Yuhangtang Road, Hangzhou, 310058 China
- />Key Laboratory of Soil Contamination Bioremediation of Zhejiang Province, School of Environmental and Resource Sciences, Zhejiang A & F University, Lin’an, Hangzhou, 311300 China
| | - Haoshu Wang
- />Zhejiang Province Key Laboratory for Water Pollution Control and Environmental Safety Technology, Institute of Environmental Science and Technology, Zhejiang University, 866 Yuhangtang Road, Hangzhou, 310058 China
| | - Karin Müller
- />Ruakura Research Centre, The New Zealand Institute for Plant and Food Research Limited, Private Bag 3123, Hamilton, New Zealand
| | - Yong Qin
- />Zhejiang Province Key Laboratory for Water Pollution Control and Environmental Safety Technology, Institute of Environmental Science and Technology, Zhejiang University, 866 Yuhangtang Road, Hangzhou, 310058 China
| | - Hailong Wang
- />Key Laboratory of Soil Contamination Bioremediation of Zhejiang Province, School of Environmental and Resource Sciences, Zhejiang A & F University, Lin’an, Hangzhou, 311300 China
| | - Weixiang Wu
- />Zhejiang Province Key Laboratory for Water Pollution Control and Environmental Safety Technology, Institute of Environmental Science and Technology, Zhejiang University, 866 Yuhangtang Road, Hangzhou, 310058 China
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Rytioja J, Hildén K, Yuzon J, Hatakka A, de Vries RP, Mäkelä MR. Plant-polysaccharide-degrading enzymes from Basidiomycetes. Microbiol Mol Biol Rev 2014; 78:614-49. [PMID: 25428937 PMCID: PMC4248655 DOI: 10.1128/mmbr.00035-14] [Citation(s) in RCA: 221] [Impact Index Per Article: 22.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
SUMMARY Basidiomycete fungi subsist on various types of plant material in diverse environments, from living and dead trees and forest litter to crops and grasses and to decaying plant matter in soils. Due to the variation in their natural carbon sources, basidiomycetes have highly varied plant-polysaccharide-degrading capabilities. This topic is not as well studied for basidiomycetes as for ascomycete fungi, which are the main sources of knowledge on fungal plant polysaccharide degradation. Research on plant-biomass-decaying fungi has focused on isolating enzymes for current and future applications, such as for the production of fuels, the food industry, and waste treatment. More recently, genomic studies of basidiomycete fungi have provided a profound view of the plant-biomass-degrading potential of wood-rotting, litter-decomposing, plant-pathogenic, and ectomycorrhizal (ECM) basidiomycetes. This review summarizes the current knowledge on plant polysaccharide depolymerization by basidiomycete species from diverse habitats. In addition, these data are compared to those for the most broadly studied ascomycete genus, Aspergillus, to provide insight into specific features of basidiomycetes with respect to plant polysaccharide degradation.
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Affiliation(s)
- Johanna Rytioja
- Department of Food and Environmental Sciences, Division of Microbiology and Biotechnology, University of Helsinki, Helsinki, Finland
| | - Kristiina Hildén
- Department of Food and Environmental Sciences, Division of Microbiology and Biotechnology, University of Helsinki, Helsinki, Finland
| | - Jennifer Yuzon
- Fungal Physiology, CBS-KNAW Fungal Biodiversity Centre, Utrecht, The Netherlands
| | - Annele Hatakka
- Department of Food and Environmental Sciences, Division of Microbiology and Biotechnology, University of Helsinki, Helsinki, Finland
| | - Ronald P de Vries
- Fungal Physiology, CBS-KNAW Fungal Biodiversity Centre, Utrecht, The Netherlands Fungal Molecular Physiology, Utrecht University, Utrecht, The Netherlands
| | - Miia R Mäkelä
- Department of Food and Environmental Sciences, Division of Microbiology and Biotechnology, University of Helsinki, Helsinki, Finland
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Kaur AP, Nocek BP, Xu X, Lowden MJ, Leyva JF, Stogios PJ, Cui H, Di Leo R, Powlowski J, Tsang A, Savchenko A. Functional and structural diversity in GH62 α-L-arabinofuranosidases from the thermophilic fungus Scytalidium thermophilum. Microb Biotechnol 2014; 8:419-33. [PMID: 25267315 PMCID: PMC4408175 DOI: 10.1111/1751-7915.12168] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2014] [Accepted: 08/16/2014] [Indexed: 01/22/2023] Open
Abstract
The genome of the thermophilic fungus Scytalidium thermophilum (strain CBS 625.91) harbours a wide range of genes involved in carbohydrate degradation, including three genes, abf62A, abf62B and abf62C, predicted to encode glycoside hydrolase family 62 (GH62) enzymes. Transcriptome analysis showed that only abf62A and abf62C are actively expressed during growth on diverse substrates including straws from barley, alfalfa, triticale and canola. The abf62A and abf62C genes were expressed in Escherichia coli and the resulting recombinant proteins were characterized. Calcium-free crystal structures of Abf62C in apo and xylotriose bound forms were determined to 1.23 and 1.48 Å resolution respectively. Site-directed mutagenesis confirmed Asp55, Asp171 and Glu230 as catalytic triad residues, and revealed the critical role of non-catalytic residues Asp194, Trp229 and Tyr338 in positioning the scissile α-L-arabinofuranoside bond at the catalytic site. Further, the +2R substrate-binding site residues Tyr168 and Asn339, as well as the +2NR residue Tyr226, are involved in accommodating long-chain xylan polymers. Overall, our structural and functional analysis highlights characteristic differences between Abf62A and Abf62C, which represent divergent subgroups in the GH62 family.
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Affiliation(s)
- Amrit Pal Kaur
- Department of Chemical Engineering and Applied Chemistry, University of Toronto, ON, M5S 3E5, Canada
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Elucidation of the molecular basis for arabinoxylan-debranching activity of a thermostable family GH62 α-l-arabinofuranosidase from Streptomyces thermoviolaceus. Appl Environ Microbiol 2014; 80:5317-29. [PMID: 24951792 DOI: 10.1128/aem.00685-14] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Xylan-debranching enzymes facilitate the complete hydrolysis of xylan and can be used to alter xylan chemistry. Here, the family GH62 α-l-arabinofuranosidase from Streptomyces thermoviolaceus (SthAbf62A) was shown to have a half-life of 60 min at 60°C and the ability to cleave α-1,3 l-arabinofuranose (l-Araf) from singly substituted xylopyranosyl (Xylp) backbone residues in wheat arabinoxylan; low levels of activity on arabinan as well as 4-nitrophenyl α-l-arabinofuranoside were also detected. After selective removal of α-1,3 l-Araf substituents from disubstituted Xylp residues present in wheat arabinoxylan, SthAbf62A could also cleave the remaining α-1,2 l-Araf substituents, confirming the ability of SthAbf62A to remove α-l-Araf residues that are (1→2) and (1→3) linked to monosubstituted β-d-Xylp sugars. Three-dimensional structures of SthAbf62A and its complex with xylotetraose and l-arabinose confirmed a five-bladed β-propeller fold and revealed a molecular Velcro in blade V between the β1 and β21 strands, a disulfide bond between Cys27 and Cys297, and a calcium ion coordinated in the central channel of the fold. The enzyme-arabinose complex structure further revealed a narrow and seemingly rigid l-arabinose binding pocket situated at the center of one side of the β propeller, which stabilized the arabinofuranosyl substituent through several hydrogen-bonding and hydrophobic interactions. The predicted catalytic amino acids were oriented toward this binding pocket, and the catalytic essentiality of Asp53 and Glu213 was confirmed by site-specific mutagenesis. Complex structures with xylotetraose revealed a shallow cleft for xylan backbone binding that is open at both ends and comprises multiple binding subsites above and flanking the l-arabinose binding pocket.
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Goyal A, Ahmed S, Fontes CMGA, Najmudin S. Crystallization and preliminary X-ray crystallographic analysis of a novel α-L-arabinofuranosidase (CtGH43) from Clostridium thermocellum ATCC 27405. Acta Crystallogr F Struct Biol Commun 2014; 70:616-8. [PMID: 24817722 PMCID: PMC4014331 DOI: 10.1107/s2053230x14006402] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2014] [Accepted: 03/22/2014] [Indexed: 11/10/2022] Open
Abstract
The truncated carbohydrate-active enzyme belonging to family 43 glycoside hydrolase from Clostridium thermocellum (CtGH43) is an α-L-arabinofuranosidase that in combination with endoxylanase leads to complete breakdown of L-arabinosyl-substituted xylans. The recombinant enzyme CtGH43 from C. thermocellum was overexpressed in Escherichia coli and purified by immobilized metal-ion affinity chromatography. The recombinant CtGH43 has a molecular mass of 35.86 kDa. Preliminary structural characterization was carried out on CtGH43 crystallized from different conditions, which gave either cube-shaped or brick-shaped crystals. These diffracted to a resolution of 1.65 Å for the cubic form and 1.1 Å for the monoclinic form. Molecular replacement was used to solve the CtGH43 structure.
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Affiliation(s)
- Arun Goyal
- Department of Biotechnology, Indian Institute of Technology Guwahati, Guwahati, 781 039, India
- CIISA–Faculdade de Medicina Veterinaria, Universidade de Lisboa, Avenida da Universidade Técnica, 1300-477 Lisbon, Portugal
| | - Shadab Ahmed
- Department of Biotechnology, Indian Institute of Technology Guwahati, Guwahati, 781 039, India
| | - Carlos M. G. A. Fontes
- CIISA–Faculdade de Medicina Veterinaria, Universidade de Lisboa, Avenida da Universidade Técnica, 1300-477 Lisbon, Portugal
| | - Shabir Najmudin
- CIISA–Faculdade de Medicina Veterinaria, Universidade de Lisboa, Avenida da Universidade Técnica, 1300-477 Lisbon, Portugal
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Siguier B, Haon M, Nahoum V, Marcellin M, Burlet-Schiltz O, Coutinho PM, Henrissat B, Mourey L, O'Donohue MJ, Berrin JG, Tranier S, Dumon C. First structural insights into α-L-arabinofuranosidases from the two GH62 glycoside hydrolase subfamilies. J Biol Chem 2014; 289:5261-73. [PMID: 24394409 DOI: 10.1074/jbc.m113.528133] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
Abstract
α-L-arabinofuranosidases are glycoside hydrolases that specifically hydrolyze non-reducing residues from arabinose-containing polysaccharides. In the case of arabinoxylans, which are the main components of hemicellulose, they are part of microbial xylanolytic systems and are necessary for complete breakdown of arabinoxylans. Glycoside hydrolase family 62 (GH62) is currently a small family of α-L-arabinofuranosidases that contains only bacterial and fungal members. Little is known about the GH62 mechanism of action, because only a few members have been biochemically characterized and no three-dimensional structure is available. Here, we present the first crystal structures of two fungal GH62 α-L-arabinofuranosidases from the basidiomycete Ustilago maydis (UmAbf62A) and ascomycete Podospora anserina (PaAbf62A). Both enzymes are able to efficiently remove the α-L-arabinosyl substituents from arabinoxylan. The overall three-dimensional structure of UmAbf62A and PaAbf62A reveals a five-bladed β-propeller fold that confirms their predicted classification into clan GH-F together with GH43 α-L-arabinofuranosidases. Crystallographic structures of the complexes with arabinose and cellotriose reveal the important role of subsites +1 and +2 for sugar binding. Intriguingly, we observed that PaAbf62A was inhibited by cello-oligosaccharides and displayed binding affinity to cellulose although no activity was observed on a range of cellulosic substrates. Bioinformatic analyses showed that UmAbf62A and PaAbf62A belong to two distinct subfamilies within the GH62 family. The results presented here provide a framework to better investigate the structure-function relationships within the GH62 family.
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Affiliation(s)
- Béatrice Siguier
- From the Université de Toulouse, INSA, UPS, INP, LISBP, 135 Avenue de Rangueil, F-31077 Toulouse
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20
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De La Mare M, Guais O, Bonnin E, Weber J, Francois JM. Molecular and biochemical characterization of three GH62 α-l-arabinofuranosidases from the soil deuteromycete Penicillium funiculosum. Enzyme Microb Technol 2013; 53:351-8. [DOI: 10.1016/j.enzmictec.2013.07.008] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2013] [Revised: 07/29/2013] [Accepted: 07/31/2013] [Indexed: 01/17/2023]
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21
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Ahmed S, Luis AS, Bras JLA, Ghosh A, Gautam S, Gupta MN, Fontes CMGA, Goyal A. A novel α-L-arabinofuranosidase of family 43 glycoside hydrolase (Ct43Araf) from Clostridium thermocellum. PLoS One 2013; 8:e73575. [PMID: 24039988 PMCID: PMC3767815 DOI: 10.1371/journal.pone.0073575] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2013] [Accepted: 07/27/2013] [Indexed: 11/25/2022] Open
Abstract
The study describes a comparative analysis of biochemical, structural and functional properties of two recombinant derivatives from Clostridium thermocellum ATCC 27405 belonging to family 43 glycoside hydrolase. The family 43 glycoside hydrolase encoding α-L-arabinofuranosidase (Ct43Araf) displayed an N-terminal catalytic module CtGH43 (903 bp) followed by two carbohydrate binding modules CtCBM6A (405 bp) and CtCBM6B (402 bp) towards the C-terminal. Ct43Araf and its truncated derivative CtGH43 were cloned in pET-vectors, expressed in Escherichia coli and functionally characterized. The recombinant proteins displayed molecular sizes of 63 kDa (Ct43Araf) and 34 kDa (CtGH43) on SDS-PAGE analysis. Ct43Araf and CtGH43 showed optimal enzyme activities at pH 5.7 and 5.4 and the optimal temperature for both was 50°C. Ct43Araf and CtGH43 showed maximum activity with rye arabinoxylan 4.7 Umg(-1) and 5.0 Umg(-1), respectively, which increased by more than 2-fold in presence of Ca(2+) and Mg(2+) salts. This indicated that the presence of CBMs (CtCBM6A and CtCBM6B) did not have any effect on the enzyme activity. The thin layer chromatography and high pressure anion exchange chromatography analysis of Ct43Araf hydrolysed arabinoxylans (rye and wheat) and oat spelt xylan confirmed the release of L-arabinose. This is the first report of α-L-arabinofuranosidase from C. thermocellum having the capacity to degrade both p-nitrophenol-α-L-arabinofuranoside and p-nitrophenol-α-L-arabinopyranoside. The protein melting curves of Ct43Araf and CtGH43 demonstrated that CtGH43 and CBMs melt independently. The presence of Ca(2+) ions imparted thermal stability to both the enzymes. The circular dichroism analysis of CtGH43 showed 48% β-sheets, 49% random coils but only 3% α-helices.
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Affiliation(s)
- Shadab Ahmed
- Department of Biotechnology, Indian Institute of Technology Guwahati, Guwahati, Assam, India
| | - Ana Sofia Luis
- CIISA-Faculdade de MedicinaVeterinaria, Avenida da Universidade Técnica, Lisbon, Portugal
| | - Joana L. A. Bras
- CIISA-Faculdade de MedicinaVeterinaria, Avenida da Universidade Técnica, Lisbon, Portugal
| | - Arabinda Ghosh
- Department of Biotechnology, Indian Institute of Technology Guwahati, Guwahati, Assam, India
| | - Saurabh Gautam
- Department of Chemistry, Indian Institute of Technology Delhi, Hauz Khas, New Delhi, India
| | - Munishwar N. Gupta
- Department of Chemistry, Indian Institute of Technology Delhi, Hauz Khas, New Delhi, India
| | - Carlos M. G. A. Fontes
- CIISA-Faculdade de MedicinaVeterinaria, Avenida da Universidade Técnica, Lisbon, Portugal
| | - Arun Goyal
- Department of Biotechnology, Indian Institute of Technology Guwahati, Guwahati, Assam, India
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Motif-guided identification of a glycoside hydrolase family 1 α-L-arabinofuranosidase in Bifidobacterium adolescentis. Biosci Biotechnol Biochem 2013; 77:1709-14. [PMID: 23924734 DOI: 10.1271/bbb.130279] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Members of glycoside hydrolase family 1 (GH1) cleave glycosidic linkages with a variety of physiological roles. Here we report a unique GH1 member encoded in the genome of Bifidobacterium adolescentis ATCC 15703. This enzyme, BAD0156, was identified from over 2,000 GH1 sequences accumulated in a database by a genome mining approach based on a motif sequence. A recombinant BAD0156 protein was characterized to confirm that this enzyme alone specifically hydrolyzes p-nitrophenyl-α-L-arabinofuranoside among the 24 p-nitrophenyl-glycosides examined. Among natural glycosides, α-1,5-linked arabino-oligosaccharides served as substrates, but arabinan, debranched arabinan, arabinoxylan, and arabinogalactan did not. A time course analysis of arabino-oligosaccharide hydrolysis indicated that BAD0156 is an exo-acting enzyme. These results suggest that BAD0156 is an α-L-arabinofuranosidase. This is the first report of a GH1 enzyme that acts specifically on arabinosides, providing information on GH1 substrate specificity.
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Hashimoto K, Yokota E, Shimmen T, Yoshida M. The myosin ATPase inhibitor, 2,3-butanedione 2-monoxime, prevents protein secretion by the basidiomycete Coprinopsis cinerea. Biotechnol Lett 2010; 33:769-75. [PMID: 21165671 DOI: 10.1007/s10529-010-0497-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2010] [Accepted: 12/01/2010] [Indexed: 11/28/2022]
Abstract
The plant-saprophytic basidiomycete, Coprinopsis cinerea, produces and secretes various cellulases during cellulose degradation as the main extracellular proteins. Although enzymatic characterization of such cellulases has been frequently reported, the mechanism of their secretion remains unclear. This study focused on myosins, actin-based motor proteins, involved in protein secretion in C. cinerea. During cultivation under cellulase-inducing condition, no cellulase activity was observed when the mycelia were treated with 2,3-butanedione 2-monoxime (BDM), a general inhibitor of myosin ATPase. Furthermore, BDM treatment disrupted the localization of the Golgi apparatus, but not that of the endoplasmic reticulum. Three genes encoding myosin-like proteins (CcMyo1, CcMyo2 and CcMyo5) were identified from the C. cinerea genome database. Transcription of these genes was promoted when the fungus was grown under cellulase-inducing condition.
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Affiliation(s)
- Kohsuke Hashimoto
- Faculty of Agriculture, Tokyo University of Agriculture and Technology, Tokyo, Japan
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