1
|
Yang Y, Zhang C, Lu H, Wu Q, Wu Y, Li W, Li X. Improvement of thermostability and catalytic efficiency of xylanase from Myceliophthora thermophilar by N-terminal and C-terminal truncation. Front Microbiol 2024; 15:1385329. [PMID: 38659990 PMCID: PMC11039872 DOI: 10.3389/fmicb.2024.1385329] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2024] [Accepted: 03/27/2024] [Indexed: 04/26/2024] Open
Abstract
Introduction Extracting xylanase from thermophilic filamentous fungi is a feasible way to obtain xylanase with good thermal stability. Methods The transcriptomic data of Myceliophthora thermophilic destructive ATCC42464 were differentially expressed and enriched. By comparing the sequences of Mtxylan2 and more than 10 xylanases, the N-terminal and C-terminal of Mtxylan2 were truncated, and three mutants 28N, 28C and 28NC were constructed. Results and discussion GH11 xylan Mtxylan2 was identified by transcriptomic analysis, the specific enzyme activity of Mtxylan2 was 104.67 U/mg, and the optimal temperature was 65°C. Molecular modification of Mtxylan2 showed that the catalytic activity of the mutants was enhanced. Among them, the catalytic activity of 28C was increased by 9.3 times, the optimal temperature was increased by 5°C, and the residual enzyme activity remained above 80% after 30 min at 50-65°C, indicating that redundant C-terminal truncation can improve the thermal stability and catalytic performance of GH11 xylanase.
Collapse
Affiliation(s)
- Yue Yang
- Key Laboratory of Geriatric Nutrition and Health (Beijing Technology and Business University), Ministry of Education, Beijing, China
- Beijing Engineering and Technology Research Center of Food Additives, Beijing Technology and Business University (BTBU), Beijing, China
| | - Chengnan Zhang
- Department of Exercise Biochemistry, Exercise Science School, Beijing Sport University, Beijing, China
| | - Hongyun Lu
- Key Laboratory of Geriatric Nutrition and Health (Beijing Technology and Business University), Ministry of Education, Beijing, China
- Beijing Engineering and Technology Research Center of Food Additives, Beijing Technology and Business University (BTBU), Beijing, China
| | - QiuHua Wu
- Key Laboratory of Geriatric Nutrition and Health (Beijing Technology and Business University), Ministry of Education, Beijing, China
- Beijing Engineering and Technology Research Center of Food Additives, Beijing Technology and Business University (BTBU), Beijing, China
| | - Yanfang Wu
- Key Laboratory of Geriatric Nutrition and Health (Beijing Technology and Business University), Ministry of Education, Beijing, China
- Beijing Engineering and Technology Research Center of Food Additives, Beijing Technology and Business University (BTBU), Beijing, China
| | - Weiwei Li
- Key Laboratory of Geriatric Nutrition and Health (Beijing Technology and Business University), Ministry of Education, Beijing, China
- Beijing Engineering and Technology Research Center of Food Additives, Beijing Technology and Business University (BTBU), Beijing, China
| | - Xiuting Li
- Key Laboratory of Geriatric Nutrition and Health (Beijing Technology and Business University), Ministry of Education, Beijing, China
- Beijing Engineering and Technology Research Center of Food Additives, Beijing Technology and Business University (BTBU), Beijing, China
| |
Collapse
|
2
|
Sürmeli Y, Şanlı-Mohamed G. Engineering of xylanases for the development of biotechnologically important characteristics. Biotechnol Bioeng 2023; 120:1171-1188. [PMID: 36715367 DOI: 10.1002/bit.28339] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2022] [Revised: 12/19/2022] [Accepted: 01/26/2023] [Indexed: 01/31/2023]
Abstract
Xylanases are the main biocatalysts used for the reduction of the xylan backbone from hemicellulose, randomly splitting off β-1,4-glycosidic linkages between xylopyranosyl residues. Xylanase market has been annually estimated at 500 million US Dollars and they are potentially used in broad industrial process ranges such as paper pulp biobleaching, xylo-oligosaccharide production, and biofuel manufacture from lignocellulose. The highly stable xylanases are preferred in the downstream procedure of industrial processes because they can tolerate severe conditions. Almost all native xylanases can not endure adverse conditions thus they are industrially not proper to be utilized. Protein engineering is a powerful technology for developing xylanases, which can effectively work in adverse conditions and can meet requirements for industrial processes. This study considered state-of-the-art strategies of protein engineering for creating the xylanase gene diversity, high-throughput screening systems toward upgraded traits of the xylanases, and the prediction and comprehensive analysis of the target mutations in xylanases by in silico methods. Also, key molecular factors have been elucidated for industrial characteristics (alkaliphilic enhancement, thermal stability, and catalytic performance) of GH11 family xylanases. The present review explores industrial characteristics improved by directed evolution, rational design, and semi-rational design as protein engineering approaches for pulp bleaching process, xylooligosaccharides production, and biorefinery & bioenergy production.
Collapse
Affiliation(s)
- Yusuf Sürmeli
- Department of Agricultural Biotechnology, Tekirdağ Namık Kemal University, Tekirdağ, Turkey
| | | |
Collapse
|
3
|
The Emergence of New Catalytic Abilities in an Endoxylanase from Family GH10 by Removing an Intrinsically Disordered Region. Int J Mol Sci 2022; 23:ijms23042315. [PMID: 35216436 PMCID: PMC8874783 DOI: 10.3390/ijms23042315] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2021] [Revised: 02/11/2022] [Accepted: 02/16/2022] [Indexed: 02/05/2023] Open
Abstract
Endoxylanases belonging to family 10 of the glycoside hydrolases (GH10) are versatile in the use of different substrates. Thus, an understanding of the molecular mechanisms underlying substrate specificities could be very useful in the engineering of GH10 endoxylanases for biotechnological purposes. Herein, we analyzed XynA, an endoxylanase that contains a (β/α)8-barrel domain and an intrinsically disordered region (IDR) of 29 amino acids at its amino end. Enzyme activity assays revealed that the elimination of the IDR resulted in a mutant enzyme (XynAΔ29) in which two new activities emerged: the ability to release xylose from xylan, and the ability to hydrolyze p-nitrophenyl-β-d-xylopyranoside (pNPXyl), a substrate that wild-type enzyme cannot hydrolyze. Circular dichroism and tryptophan fluorescence quenching by acrylamide showed changes in secondary structure and increased flexibility of XynAΔ29. Molecular dynamics simulations revealed that the emergence of the pNPXyl-hydrolyzing activity correlated with a dynamic behavior not previously observed in GH10 endoxylanases: a hinge-bending motion of two symmetric regions within the (β/α)8-barrel domain, whose hinge point is the active cleft. The hinge-bending motion is more intense in XynAΔ29 than in XynA and promotes the formation of a wider active site that allows the accommodation and hydrolysis of pNPXyl. Our results open new avenues for the study of the relationship between IDRs, dynamics and activity of endoxylanases, and other enzymes containing (β/α)8-barrel domain.
Collapse
|
4
|
Wang Y, Wang J, Zhang Z, Yang J, Turunen O, Xiong H. High-temperature behavior of hyperthermostable Thermotoga maritima xylanase XYN10B after designed and evolved mutations. Appl Microbiol Biotechnol 2022; 106:2017-2027. [PMID: 35171339 DOI: 10.1007/s00253-022-11823-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2021] [Revised: 01/29/2022] [Accepted: 02/05/2022] [Indexed: 11/24/2022]
Abstract
A hyperthermostable xylanase XYN10B from Thermotoga maritima (PDB code 1VBR, GenBank accession number KR078269) was subjected to site-directed and error-prone PCR mutagenesis. From the selected five mutants, the two site-directed mutants (F806H and F806V) showed a 3.3-3.5-fold improved enzyme half-life at 100 °C. The mutant XYNA generated by error-prone PCR showed slightly improved stability at 100 °C and a lower Km. In XYNB and XYNC, the additional mutations over XYNA decreased the thermostability and temperature optimum, while elevating the Km. In XYNC, two large side-chains were introduced into the protein's interior. Micro-differential scanning calorimetry (DSC) showed that the melting temperature (Tm) dropped in XYNB and XYNC from 104.9 °C to 93.7 °C and 78.6 °C, respectively. The detrimental mutations showed that extremely thermostable enzymes can tolerate quite radical mutations in the protein's interior and still retain high thermostability. The analysis of mutations (F806H and F806V) in a hydrophobic area lining the substrate-binding region indicated that active site hydrophobicity is important for high activity at extreme temperatures. Although polar His at 806 provided higher stability, the hydrophobic Phe at 806 provided higher activity than His. This study generates an understanding of how extreme thermostability and high activity are formed in GH10 xylanases. KEY POINTS: • Characterization and molecular dynamics simulations of TmXYN10B and its mutants • Explanation of structural stability of GH10 xylanase.
Collapse
Affiliation(s)
- Yawei Wang
- College of Life Science and Technology, Wuhan Polytechnic University, Wuhan, 430048, China
| | - Jing Wang
- College of Life Science, South-central University for Nationalities, Wuhan, 430074, China
| | - Zhongqiang Zhang
- College of Life Science, South-central University for Nationalities, Wuhan, 430074, China
| | - Jiangke Yang
- College of Life Science and Technology, Wuhan Polytechnic University, Wuhan, 430048, China
| | - Ossi Turunen
- School of Forest Sciences, University of Eastern Finland, FI-80101, Joensuu, Finland.
| | - Hairong Xiong
- College of Life Science, South-central University for Nationalities, Wuhan, 430074, China.
| |
Collapse
|
5
|
Tang K, Cui Y, Xiao J, Ding M, Chao H, Wu J, Han Z, Liu J, Li X, Yan D. Molecular cloning and characterization of a novel xylanase from Microbacterium imperiale YD-01. J Food Biochem 2021; 45:e13988. [PMID: 34730252 DOI: 10.1111/jfbc.13988] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2021] [Revised: 09/25/2021] [Accepted: 10/13/2021] [Indexed: 11/27/2022]
Abstract
Xylaneses are very common xylanolytic enzymes, which are widely used in food, papermaking, and other industries. In this study, a xylanase-encoding gene xyn1923, which encodes a protein of 1352 amino acids, was identified through the whole genome analysis of Microbacterium imperiale YD-01. Bioinformatics analysis showed that Xyn1923 only had maximum similarity of 37% with the reported xylanase from Alkalihalobacillus halodurans C-125, indicating that Xyn1923 was a novel xylanase. The enzymatic properties of Xyn1923 were systematically analyzed after purification. The results showed that the specific activity of the enzyme was 10.582 ± 0.413 U/mg, while the optimum pH and temperature of the enzyme were 7.0 and 70°C, respectively. The enzyme is stable in the pH range of 6.0-9.0, and the enzyme activity could maintain more than 85% of the original activity after 16 hr incubation at pH 9.0. The enzyme activity is relatively stable in the range of 30-60°C, and its enzyme activity could maintain more than 89% of the original activity after treatment at 60°C for 30 min. Low concentrations (≤1 mM) of Co2+ , Ba2+ , Fe2+ , and Fe3+ metal ions exerted a stimulatory effect on the activity of Xyn1923. And in contrast, high concentrations (≥2 mM) of the above metal ions inhibit the activity of Xyn1923. Mg2+ , Ag+ , Cu2+ , Ca2+ , Mn2+ , and Pb2+ ions showed a negative effect on the activity of Xyn1923. Enzyme kinetic studies showed that Km and Vmax values for xylan were 7.842 ± 0.538 mg/ml and 15.208 ± 0.822 U/mg, respectively. Xyn1923 was found to be a weakly alkaline thermophilic xylanase through an enzymatic property analysis. PRACTICAL APPLICATIONS: Xylanases are widely used in food and feed, biofuels, papermaking, and other industries. However, their use is limited by poor performance under the conditions of pH and temperature. Therefore, the discovery of xylanases with the capability of working efficiently at alkaline pH and high temperature is the priority for its industrial applications. In this study, a novel xylanase-encoding gene xyn1923 from Microbacterium imperiale YD-01 was cloned and heterologously expressed in Escherichia coli. Enzymatic properties of this novel xylanase were investigated, indicating that the robust thermal stability and alkali resistance of Xyn1923 make it a potential candidate for the food and paper industries.
Collapse
Affiliation(s)
- Keqin Tang
- Hubei Key Laboratory of Animal Nutrition and Feed Science, Wuhan Polytechnic University, Wuhan, China.,School of life science and technology, Wuhan Polytechnic University, Wuhan, China
| | - Yin Cui
- School of life science and technology, Wuhan Polytechnic University, Wuhan, China
| | - Jingyi Xiao
- City University of Hong Kong, Kowloon, China
| | - Mengyao Ding
- School of life science and technology, Wuhan Polytechnic University, Wuhan, China
| | - Hongjun Chao
- School of life science and technology, Wuhan Polytechnic University, Wuhan, China
| | - Jing Wu
- School of life science and technology, Wuhan Polytechnic University, Wuhan, China
| | - Zhenggang Han
- School of life science and technology, Wuhan Polytechnic University, Wuhan, China
| | - Jun Liu
- School of life science and technology, Wuhan Polytechnic University, Wuhan, China
| | - Xin Li
- School of life science and technology, Wuhan Polytechnic University, Wuhan, China
| | - Dazhong Yan
- Hubei Key Laboratory of Animal Nutrition and Feed Science, Wuhan Polytechnic University, Wuhan, China.,School of life science and technology, Wuhan Polytechnic University, Wuhan, China
| |
Collapse
|
6
|
Xie W, Yu Q, Zhang R, Liu Y, Cao R, Wang S, Zhan R, Liu Z, Wang K, Wang C. Insights into the Catalytic Mechanism of a Novel XynA and Structure-Based Engineering for Improving Bifunctional Activities. Biochemistry 2021; 60:2071-2083. [PMID: 34156819 DOI: 10.1021/acs.biochem.1c00134] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Xylan and cellulose are the two major constituents of numerous types of lignocellulose. The bifunctional enzyme that exhibits xylanase/cellulase activity has attracted a great deal of attention in biofuel production. Previously, a thermostable GH10 family enzyme (XynA) from Bacillus sp. KW1 was found to degrade both xylan and cellulose. To improve bifunctional activity on the basis of structure, we first determined the crystal structure of XynA at 2.3 Å. Via molecular docking and activity assays, we revealed that Gln250 and His252 were indispensable to bifunctionality, because they could interact with two conserved catalytic residues, Glu182 and Glu280, while bringing the substrate close to the activity pocket. Then we used a structure-based engineering strategy to improve xylanase/cellulase activity. Although no mutants with increased bifunctional activity were obtained after much screening, we found the answer in the N-terminal 36-amino acid truncation of XynA. The activities of XynA_ΔN36 toward beechwood xylan, wheat arabinoxylan, filter paper, and barley β-glucan were significantly increased by 0.47-, 0.53-, 2.46-, and 1.04-fold, respectively. Furthermore, upon application, this truncation released more reducing sugars than the wild type in the degradation of pretreated corn stover and sugar cane bagasse. These results showed the detailed molecular mechanism of the GH10 family bifunctional endoxylanase/cellulase. The basis of these catalytic performances and the screened XynA_ΔN36 provide clues for the further use of XynA in industrial applications.
Collapse
Affiliation(s)
- Wei Xie
- Guangdong Key Laboratory for Translational Cancer Research of Chinese Medicine, Joint Laboratory for Translational Cancer Research of Chinese Medicine of the Ministry of Education of the People's Republic of China, International Institute for Translational Chinese Medicine, Guangzhou University of Chinese Medicine, Guangzhou, Guangdong 510006, China
| | - Qi Yu
- Guangdong Key Laboratory for Translational Cancer Research of Chinese Medicine, Joint Laboratory for Translational Cancer Research of Chinese Medicine of the Ministry of Education of the People's Republic of China, International Institute for Translational Chinese Medicine, Guangzhou University of Chinese Medicine, Guangzhou, Guangdong 510006, China
| | - Ruiqing Zhang
- Research Center of Chinese Herbal Resource Science and Engineering, Key Laboratory of Chinese Medicinal Resource from Lingnan (Guangzhou University of Chinese Medicine), Ministry of Education, Joint Laboratory of National Engineering Research Center for the Pharmaceutics of Traditional Chinese Medicines, Guangzhou University of Chinese Medicine, Guangzhou, Guangdong 510006, China
| | - Yun Liu
- Research Center of Chinese Herbal Resource Science and Engineering, Key Laboratory of Chinese Medicinal Resource from Lingnan (Guangzhou University of Chinese Medicine), Ministry of Education, Joint Laboratory of National Engineering Research Center for the Pharmaceutics of Traditional Chinese Medicines, Guangzhou University of Chinese Medicine, Guangzhou, Guangdong 510006, China
| | - Ruoting Cao
- Research Center of Chinese Herbal Resource Science and Engineering, Key Laboratory of Chinese Medicinal Resource from Lingnan (Guangzhou University of Chinese Medicine), Ministry of Education, Joint Laboratory of National Engineering Research Center for the Pharmaceutics of Traditional Chinese Medicines, Guangzhou University of Chinese Medicine, Guangzhou, Guangdong 510006, China
| | - Sidi Wang
- College of Fundamental Medical Sciences, Guangzhou University of Chinese Medicine, Guangzhou 510006, China
| | - Ruoting Zhan
- Research Center of Chinese Herbal Resource Science and Engineering, Key Laboratory of Chinese Medicinal Resource from Lingnan (Guangzhou University of Chinese Medicine), Ministry of Education, Joint Laboratory of National Engineering Research Center for the Pharmaceutics of Traditional Chinese Medicines, Guangzhou University of Chinese Medicine, Guangzhou, Guangdong 510006, China
| | - Zhongqiu Liu
- Guangdong Key Laboratory for Translational Cancer Research of Chinese Medicine, Joint Laboratory for Translational Cancer Research of Chinese Medicine of the Ministry of Education of the People's Republic of China, International Institute for Translational Chinese Medicine, Guangzhou University of Chinese Medicine, Guangzhou, Guangdong 510006, China
| | - Kui Wang
- Research Center of Chinese Herbal Resource Science and Engineering, Key Laboratory of Chinese Medicinal Resource from Lingnan (Guangzhou University of Chinese Medicine), Ministry of Education, Joint Laboratory of National Engineering Research Center for the Pharmaceutics of Traditional Chinese Medicines, Guangzhou University of Chinese Medicine, Guangzhou, Guangdong 510006, China
| | - Caiyan Wang
- Guangdong Key Laboratory for Translational Cancer Research of Chinese Medicine, Joint Laboratory for Translational Cancer Research of Chinese Medicine of the Ministry of Education of the People's Republic of China, International Institute for Translational Chinese Medicine, Guangzhou University of Chinese Medicine, Guangzhou, Guangdong 510006, China
| |
Collapse
|
7
|
Li G, Zhou X, Li Z, Liu Y, Liu D, Miao Y, Wan Q, Zhang R. Significantly improving the thermostability of a hyperthermophilic GH10 family xylanase XynAF1 by semi-rational design. Appl Microbiol Biotechnol 2021; 105:4561-4576. [PMID: 34014347 DOI: 10.1007/s00253-021-11340-9] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2021] [Revised: 04/16/2021] [Accepted: 05/09/2021] [Indexed: 11/28/2022]
Abstract
Xylanases have a broad range of applications in industrial biotechnologies, which require the enzymes to resist the high-temperature environments. The majority of xylanases have maximum activity at moderate temperatures, which limited their potential applications in industries. In this study, a thermophilic GH10 family xylanase XynAF1 from the high-temperature composting strain Aspergillus fumigatus Z5 was characterized and engineered to further improve its thermostability. XynAF1 has the optimal reaction temperature of 90 °C. The crystal structure of XynAF1 was obtained by X-ray diffraction after heterologous expression, purification, and crystallization. The high-resolution X-ray crystallographic structure of the protein-product complex was obtained by soaking the apo-state crystal with xylotetraose. Structure analysis indicated that XynAF1 has a rigid skeleton, which helps to maintain the hyperthermophilic characteristic. The homologous structure analysis and the catalytic center mutant construction of XynAF1 indicated the conserved catalytic center contributed to the high optimum catalytic temperature. The amino acids in the surface of xylanase XynAF1 which might influence the enzyme thermostability were identified by the structure analysis. Combining the rational design with the saturation mutation at the high B-value regions, the integrative mutant XynAF1-AC with a 6-fold increase of thermostability was finally obtained. This study efficiently improved the thermostability of a GH10 family xylanase by semi-rational design, which provided a new biocatalyst for high-temperature biotechnological applications. KEY POINTS: • Obtained the crystal structure of GH10 family hyperthermophilic xylanase XynAF1. • Shed light on the understanding of the GH10 family xylanase thermophilic mechanism. • Constructed a 6-fold increased thermostability recombinant xylanase.
Collapse
Affiliation(s)
- Guangqi Li
- Key Laboratory of Microbial Resources Collection and Preservation, Ministry of Agriculture, Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing, 100081, People's Republic of China.,Jiangsu Provincial Key Lab for Organic Solid Waste Utilization, National Engineering Research Center for Organic-based Fertilizers, Jiangsu Collaborative Innovation Center for Solid Organic Waste Resource Utilization, Nanjing Agricultural University, Nanjing, 210095, People's Republic of China
| | - Xuan Zhou
- National Agricultural Technology Extension and Service Center, Beijing, 100125, People's Republic of China
| | - Zhihong Li
- College of Science, Nanjing Agricultural University, Nanjing, 210095, People's Republic of China
| | - Yunpeng Liu
- Key Laboratory of Microbial Resources Collection and Preservation, Ministry of Agriculture, Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing, 100081, People's Republic of China
| | - Dongyang Liu
- Jiangsu Provincial Key Lab for Organic Solid Waste Utilization, National Engineering Research Center for Organic-based Fertilizers, Jiangsu Collaborative Innovation Center for Solid Organic Waste Resource Utilization, Nanjing Agricultural University, Nanjing, 210095, People's Republic of China
| | - Youzhi Miao
- Jiangsu Provincial Key Lab for Organic Solid Waste Utilization, National Engineering Research Center for Organic-based Fertilizers, Jiangsu Collaborative Innovation Center for Solid Organic Waste Resource Utilization, Nanjing Agricultural University, Nanjing, 210095, People's Republic of China
| | - Qun Wan
- College of Science, Nanjing Agricultural University, Nanjing, 210095, People's Republic of China. .,The Key Laboratory of Plant Immunity, Nanjing Agricultural University, Nanjing, 210095, People's Republic of China.
| | - Ruifu Zhang
- Key Laboratory of Microbial Resources Collection and Preservation, Ministry of Agriculture, Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing, 100081, People's Republic of China. .,Jiangsu Provincial Key Lab for Organic Solid Waste Utilization, National Engineering Research Center for Organic-based Fertilizers, Jiangsu Collaborative Innovation Center for Solid Organic Waste Resource Utilization, Nanjing Agricultural University, Nanjing, 210095, People's Republic of China.
| |
Collapse
|
8
|
Purohit A, Singh G, Yadav SK. Chimeric bi-functional enzyme possessing xylanase and deacetylase activity for hydrolysis of agro-biomass rich in acetylated xylan. Colloids Surf B Biointerfaces 2021; 204:111832. [PMID: 33984614 DOI: 10.1016/j.colsurfb.2021.111832] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2021] [Revised: 05/04/2021] [Accepted: 05/07/2021] [Indexed: 10/21/2022]
Abstract
Here, a chimeric bifunctional enzyme was developed for two activities xylanase and deacetylase. Chimeric enzyme was designed by combining the relevant amino acid stretches from two different parent sequences, such as polysaccharide/xylan deacetylase (ref id: MT682066) and xylanase (ref id WP_110897546.1). Five different hypothetical chimeras were developed and one of the best predicted chimeric protein GA_2(syn_SKYAP01) was synthesized. The GA_2(syn_SKYAP01) possessed the specific activity of 14.905 ± 0.8 U/mg for deacetylase and 100.87 ± 14.2 U/mg for xylanase. Optimum level of both the activities together was achieved at pH 5 and 60 °C. The chimeric protein was also found to be stable at higher temperature of 71°C. Functionality of the developed chimeric protein for both the activities was confirmed by the hydrolysis of commercial xylan into xylooligosaccharides and the release of acetic acid from glucose pentacetate and 7-amino cephalosporin. The designed bifunctional enzyme was found to be highly efficient.
Collapse
Affiliation(s)
- Anjali Purohit
- Center of Innovative and Applied Bioprocessing (CIAB), Sector-81 (Knowledge City), Mohali, 140306, PB, India
| | - Gurjant Singh
- Center of Innovative and Applied Bioprocessing (CIAB), Sector-81 (Knowledge City), Mohali, 140306, PB, India
| | - Sudesh Kumar Yadav
- Center of Innovative and Applied Bioprocessing (CIAB), Sector-81 (Knowledge City), Mohali, 140306, PB, India.
| |
Collapse
|
9
|
Structural insights into xylanase mutant 254RL1 for improved activity and lower pH optimum. Enzyme Microb Technol 2021; 147:109786. [PMID: 33992408 DOI: 10.1016/j.enzmictec.2021.109786] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2020] [Revised: 03/16/2021] [Accepted: 03/17/2021] [Indexed: 11/24/2022]
Abstract
Xylanases degrade xylan to valuable end products. In our previous study, the alkaline xylanase S7-xyl from Bacillus halodurans S7 was engineered by rational design and the best mutant xylanase 254RL1 exhibited 3.4-fold improvements in specific activity at pH 9.0. Further research found that the enzyme activity at pH 6.0 was almost 2-fold than that at pH 9.0. To elucidate the reason of enhanced performance of 254RL1 at decreased pH optimum, we determined the X-ray crystal structure of 254RL1 at 2.21 Å resolution. The structural analysis revealed that the mutations enlarged the opening of the access tunnel and shortened the tunnel. Moreover, the mutations changed the hydrogen bond network around the catalytic residue and decreased the pKa value of acid-base catalyst E159 which reduced the pH optimum of the xylanase. The result provided the basis for the acid-alkaline engineering of the glycoside hydrolases.
Collapse
|
10
|
Lai Z, Zhou C, Ma X, Xue Y, Ma Y. Enzymatic characterization of a novel thermostable and alkaline tolerant GH10 xylanase and activity improvement by multiple rational mutagenesis strategies. Int J Biol Macromol 2020; 170:164-177. [PMID: 33352153 DOI: 10.1016/j.ijbiomac.2020.12.137] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2020] [Revised: 12/08/2020] [Accepted: 12/17/2020] [Indexed: 11/15/2022]
Abstract
Thermo-alkaline xylanases are widely applied in paper pulping industry. In this study, a novel thermostable and alkaline tolerant GH10 xylanase (Xyn30Y5) gene from alkaliphilic Bacillus sp. 30Y5 was cloned and the surface-layer homology (SLH) domains truncated enzyme (Xyn30Y5-SLH) was expressed in Escherichia coli. The purified Xyn30Y5-SLH was most active at 70 °C and pH 7.0 and showed the highest specific activity of 349.4 U mg-1. It retained more than 90% activity between pH 6.0 to 9.5 and was stable at pH 6.0-10.0. To improve the activity, 47 mutants were designed based on eight rational strategies and 21 mutants showed higher activity. By combinatorial mutagenesis, the best mutant 3B demonstrated specific activity of 1016.8 U mg-1 with a doubled catalytic efficiency (kcat/Km) and RA601/2h value, accompanied by optimal pH shift to 8.0. The molecular dynamics simulation analysis indicated that the increase of flexibility of α5 helix and loop7 located near to the catalytic residues is likely responsible for its activity improvement. And the decrease of flexibility of the most unstable regions is vital for the thermostablity improvement. This work provided not only a novel thermostable and alkaline tolerant xylanase with industrial application potential but also an effective mutagenesis strategy for xylanase activity improvement.
Collapse
Affiliation(s)
- Zhihua Lai
- State Key Laboratory of Microbial Resources, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, China
| | - Cheng Zhou
- State Key Laboratory of Microbial Resources, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, China.
| | - Xiaochen Ma
- State Key Laboratory of Microbial Resources, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, China
| | - Yanfen Xue
- State Key Laboratory of Microbial Resources, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, China
| | - Yanhe Ma
- State Key Laboratory of Microbial Resources, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, China; National Engineering Laboratory for Industrial Enzymes, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, China.
| |
Collapse
|
11
|
Yang J, Ma T, Shang-Guan F, Han Z. Improving the catalytic activity of thermostable xylanase from Thermotoga maritima via mutagenesis of non-catalytic residues at glycone subsites. Enzyme Microb Technol 2020; 139:109579. [PMID: 32732029 DOI: 10.1016/j.enzmictec.2020.109579] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2020] [Revised: 03/31/2020] [Accepted: 04/14/2020] [Indexed: 10/24/2022]
Abstract
Endo-β-1,4-xylanase from Thermotoga maritima, TmxB, is an industrially attractive enzyme due to its extreme thermostability. To improve its application value, four variants were designed on the basis of multiple sequence and three-dimensional structure alignments. Wild-type TmxB (wt-TmxB) and its mutants were produced via a Pichia pastoris expression system. Among four single-site mutants, the tyrosine substitution of a threonine residue (T74Y) at putative -3/-4 subsite led to a 1.3-fold increase in specific activity at 40 °C - 100 °C and pH 5 for 5 min, with beechwood xylan as the substrate. T74Y had an improved catalytic efficiency (kcat/Km), being 1.6 times that of wt-TmxB. Variants DY (two amino acid insertions) and N68Q displayed a slight increase (1.2 fold) and dramatic decline (1.7 fold) in catalytic efficiency, respectively. Mutant E67Y was totally inactive under all test conditions. Structural modeling and docking simulation elucidated structural insights into the molecular mechanism of activity changes for these TmxB variants. This study helps in further understanding the roles of the non-catalytic amino acids at the glycone subsites of xylanases from glycoside hydrolase family 10.
Collapse
Affiliation(s)
- Jiangke Yang
- College of Biology and Pharmaceutical Engineering, Wuhan Polytechnic University, Wuhan 430023, China
| | - Tengfei Ma
- School of Biotechnology, Jiangnan University, Wuxi 214122, China
| | - Fang Shang-Guan
- College of Biology and Pharmaceutical Engineering, Wuhan Polytechnic University, Wuhan 430023, China
| | - Zhenggang Han
- College of Biology and Pharmaceutical Engineering, Wuhan Polytechnic University, Wuhan 430023, China.
| |
Collapse
|
12
|
Zn2+ stapling of N and C-terminal maintains stability and substrate affinity in GH26 endo-mannanase. Enzyme Microb Technol 2020; 135:109497. [DOI: 10.1016/j.enzmictec.2019.109497] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2019] [Revised: 11/13/2019] [Accepted: 12/20/2019] [Indexed: 01/09/2023]
|
13
|
Rehman H, Akram M, Kiyani MM, Yaseen T, Ghani A, Saggu JI, Shah SSH, Khalid ZM, Bokhari SAI. Effect of Endoxylanase and Iron Oxide Nanoparticles on Performance and Histopathological Features in Broilers. Biol Trace Elem Res 2020; 193:524-535. [PMID: 31062212 DOI: 10.1007/s12011-019-01737-z] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/14/2019] [Accepted: 04/16/2019] [Indexed: 11/27/2022]
Abstract
Endoxylanase enzyme is used as poultry feed additive to degrade anti-nutritional factors like non-starch polysaccharides. Moreover, iron is one of the most important trace elements, and its deficiency can lead to various pathological conditions and stunted growth. In the current study, a combination of xylanase and iron nanoparticles is used to assess the overall effect on poultry growth. Endoxylanase enzyme was obtained from Aspergillus awamori SAIB-17 (identified on the basis of internal transcribed spacer (ITS) sequence analysis). The characterization of purified endoxylanase revealed that the Km and Vmax were 0.25 g/ml and 833.33 nkat/ml/s, respectively. Effect of pH and temperature showed that pH 4.5 and temperature 45 °C was best for enzyme activity. Iron nanoparticles were synthesized by co-precipitation of ferric chloride and ferrous chloride. Characterization of nanoparticles using X-ray diffraction (XRD) and SEM revealed that the mean diameter of synthesized iron nanoparticles was around 50 nm. These nanoparticles have no inhibitory effect on endoxylanase up to concentration of 20 ppm. Iron oxide nanoparticles along with endoxylanase were used as additives in different concentrations and were fed to the groups of broiler chicks. It was observed that the group fed with 40 nkat of endoxylanase and 15 ppm of iron nanoparticles showed 54.5% (2010 ± 103.58) more weight gain by the fifth week as compared with the control group. The iron analysis in the muscles showed no increase in iron concentration while histopathology slides showed no morphological changes in liver cells. The combination of iron oxide nanoparticles and xylanase proved to have great potential to be used in poultry feed for large-scale meat production without any toxicological effects.
Collapse
Affiliation(s)
- Hamza Rehman
- Department of Bioinformatics and Biotechnology, International Islamic University, Islamabad, Pakistan.
| | - Muzamal Akram
- Department of Bioinformatics and Biotechnology, International Islamic University, Islamabad, Pakistan
| | - Mubin Mustafa Kiyani
- Department of Bioinformatics and Biotechnology, International Islamic University, Islamabad, Pakistan
- Riphah College of Rehabilitation Sciences, Riphah International University, Islamabad, Pakistan
| | - Talha Yaseen
- Department of Bioinformatics and Biotechnology, International Islamic University, Islamabad, Pakistan
| | - Abdul Ghani
- Department of Bioinformatics and Biotechnology, International Islamic University, Islamabad, Pakistan
| | | | | | - Zafar Mahmood Khalid
- Department of Bioinformatics and Biotechnology, International Islamic University, Islamabad, Pakistan
| | - Syed Ali Imran Bokhari
- Department of Bioinformatics and Biotechnology, International Islamic University, Islamabad, Pakistan
| |
Collapse
|
14
|
Takita T, Nakatani K, Katano Y, Suzuki M, Kojima K, Saka N, Mikami B, Yatsunami R, Nakamura S, Yasukawa K. Increase in the thermostability of GH11 xylanase XynJ from Bacillus sp. strain 41M-1 using site saturation mutagenesis. Enzyme Microb Technol 2019; 130:109363. [DOI: 10.1016/j.enzmictec.2019.109363] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2019] [Revised: 05/29/2019] [Accepted: 06/17/2019] [Indexed: 10/26/2022]
|
15
|
Li G, Chen X, Zhou X, Huang R, Li L, Miao Y, Liu D, Zhang R. Improvement of GH10 family xylanase thermostability by introducing of an extra α-helix at the C-terminal. Biochem Biophys Res Commun 2019; 515:417-422. [DOI: 10.1016/j.bbrc.2019.05.163] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2019] [Accepted: 05/27/2019] [Indexed: 10/26/2022]
|
16
|
Han H, Ling Z, Khan A, Virk AK, Kulshrestha S, Li X. Improvements of thermophilic enzymes: From genetic modifications to applications. BIORESOURCE TECHNOLOGY 2019; 279:350-361. [PMID: 30755321 DOI: 10.1016/j.biortech.2019.01.087] [Citation(s) in RCA: 49] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/30/2018] [Revised: 01/19/2019] [Accepted: 01/21/2019] [Indexed: 06/09/2023]
Abstract
Thermozymes (from thermophiles or hyperthermophiles) offer obvious advantages due to their excellent thermostability, broad pH adaptation, and hydrolysis ability, resulting in diverse industrial applications including food, paper, and textile processing, biofuel production. However, natural thermozymes with low yield and poor adaptability severely hinder their large-scale applications. Extensive studies demonstrated that using genetic modifications such as directed evolution, semi-rational design, and rational design, expression regulations and chemical modifications effectively improved enzyme's yield, thermostability and catalytic efficiency. However, mechanism-based techniques for thermozymes improvements and applications need more attention. In this review, stabilizing mechanisms of thermozymes are summarized for thermozymes improvements, and these improved thermozymes eventually have large-scale industrial applications.
Collapse
Affiliation(s)
- Huawen Han
- Ministry of Education Key Laboratory of Cell Activities and Stress Adaptations, School of Life Science, Lanzhou University, Tianshui South Road #222, Lanzhou, Gansu 730000, People's Republic of China
| | - Zhenmin Ling
- Ministry of Education Key Laboratory of Cell Activities and Stress Adaptations, School of Life Science, Lanzhou University, Tianshui South Road #222, Lanzhou, Gansu 730000, People's Republic of China
| | - Aman Khan
- Ministry of Education Key Laboratory of Cell Activities and Stress Adaptations, School of Life Science, Lanzhou University, Tianshui South Road #222, Lanzhou, Gansu 730000, People's Republic of China
| | - Amanpreet Kaur Virk
- Faculty of Applied Sciences and Biotechnology, Shoolini University of Biotechnology and Management Sciences, Bajhol, Solan, Himachal Pradesh 173229, India
| | - Saurabh Kulshrestha
- Faculty of Applied Sciences and Biotechnology, Shoolini University of Biotechnology and Management Sciences, Bajhol, Solan, Himachal Pradesh 173229, India
| | - Xiangkai Li
- Ministry of Education Key Laboratory of Cell Activities and Stress Adaptations, School of Life Science, Lanzhou University, Tianshui South Road #222, Lanzhou, Gansu 730000, People's Republic of China.
| |
Collapse
|
17
|
Sun Z, Liu Q, Qu G, Feng Y, Reetz MT. Utility of B-Factors in Protein Science: Interpreting Rigidity, Flexibility, and Internal Motion and Engineering Thermostability. Chem Rev 2019; 119:1626-1665. [PMID: 30698416 DOI: 10.1021/acs.chemrev.8b00290] [Citation(s) in RCA: 278] [Impact Index Per Article: 55.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Zhoutong Sun
- Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, 32 West Seventh Avenue, Tianjin Airport Economic Area, Tianjin 300308, China
| | - Qian Liu
- State Key Laboratory of Microbial Metabolism, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Ge Qu
- Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, 32 West Seventh Avenue, Tianjin Airport Economic Area, Tianjin 300308, China
| | - Yan Feng
- State Key Laboratory of Microbial Metabolism, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Manfred T. Reetz
- Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, 32 West Seventh Avenue, Tianjin Airport Economic Area, Tianjin 300308, China
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, 45470 Mülheim an der Ruhr, Germany
- Chemistry Department, Philipps-University, Hans-Meerwein-Strasse 4, 35032 Marburg, Germany
| |
Collapse
|
18
|
Han B, Hou Y, Jiang T, Lv B, Zhao L, Feng X, Li C. Computation-Aided Rational Deletion of C-Terminal Region Improved the Stability, Activity, and Expression Level of GH2 β-Glucuronidase. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2018; 66:11380-11389. [PMID: 30296070 DOI: 10.1021/acs.jafc.8b03449] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
In this study, computation-aided design on the basis of structural analysis was employed to rationally identify a highly dynamic C-terminal region that regulates the stability, expression level, and activity of a GH2 fungal glucuronidase from Aspergillus oryzae Li-3 (PGUS). Then, four mutants with a precisely truncated C-terminal region in different lengths were constructed; among them, mutant D591-604 with a 3.8-fold increase in half-life at 65 °C and a 6.8 kJ/mol increase in Gibbs free energy showed obviously improved kinetic and thermodynamic stability in comparison to PGUS. Mutants D590-604 and D591-604 both showed approximately 2.4-fold increases in the catalytic efficiency kcat/ Km and 1.8-fold increases in the expression level. Additionally, the expression level of PGUS was doubled through a C-terminal region swap with bacterial GUS from E. coli (EGUS). Finally, the robust PGUS mutants D590-604 and D591-604 were applied in the preparation of glycyrrhetinic acid with 4.0- and 4.4-fold increases in concentration through glycyrrhizin hydrolysis by a fed-batch process.
Collapse
Affiliation(s)
- Beijia Han
- Institute for Synthetic Biosystem/Department of Biochemical Engineering, School of Chemistry and Chemical Engineering , Beijing Institute of Technology , Beijing 100081 , People's Republic of China
| | - Yuhui Hou
- Institute for Synthetic Biosystem/Department of Biochemical Engineering, School of Chemistry and Chemical Engineering , Beijing Institute of Technology , Beijing 100081 , People's Republic of China
| | - Tian Jiang
- Institute for Synthetic Biosystem/Department of Biochemical Engineering, School of Chemistry and Chemical Engineering , Beijing Institute of Technology , Beijing 100081 , People's Republic of China
| | - Bo Lv
- Institute for Synthetic Biosystem/Department of Biochemical Engineering, School of Chemistry and Chemical Engineering , Beijing Institute of Technology , Beijing 100081 , People's Republic of China
| | - Lina Zhao
- Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety , Institute of High Energy Physics, Chinese Academy of Sciences , Beijing 100049 , People's Republic of China
| | - Xudong Feng
- Institute for Synthetic Biosystem/Department of Biochemical Engineering, School of Chemistry and Chemical Engineering , Beijing Institute of Technology , Beijing 100081 , People's Republic of China
| | - Chun Li
- Institute for Synthetic Biosystem/Department of Biochemical Engineering, School of Chemistry and Chemical Engineering , Beijing Institute of Technology , Beijing 100081 , People's Republic of China
| |
Collapse
|
19
|
Increase in the thermostability of Bacillus sp. strain TAR-1 xylanase using a site saturation mutagenesis library. Biosci Biotechnol Biochem 2018; 82:1715-1723. [DOI: 10.1080/09168451.2018.1495550] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Abstract
ABSTRACT
Site saturation mutagenesis library is a recently developed technique, in which any one out of all amino acid residues in a target region is substituted into other 19 amino acid residues. In this study, we used this technique to increase the thermostability of a GH10 xylanase, XynR, from Bacillus sp. strain TAR-1. We hypothesized that the substrate binding region of XynR is flexible, and that the thermostability of XynR will increase if the flexibility of the substrate binding region is decreased without impairing the substrate binding ability. Site saturation mutagenesis libraries of amino acid residues Tyr43–Lys115 and Ala300–Asn325 of XynR were constructed. By screening 480 clones, S92E was selected as the most thermostable one, exhibiting the residual activity of 80% after heat treatment at 80°C for 15 min in the hydrolysis of Remazol Brilliant Blue-xylan. Our results suggest that this strategy is effective for stabilization of GH10 xylanase.
Abbreviations: DNS: 3,5-dinitrosalicylic acid; RBB-xylan: Remazol Brilliant Blue-xylan
Collapse
|
20
|
Site-directed mutagenesis of GH10 xylanase A from Penicillium canescens for determining factors affecting the enzyme thermostability. Int J Biol Macromol 2017. [DOI: 10.1016/j.ijbiomac.2017.06.079] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
|
21
|
Han Y, Gao P, Yu W, Lu X. N-Terminal seven-amino-acid extension simultaneously improves the pH stability, optimal temperature, thermostability and catalytic efficiency of chitosanase CsnA. Biotechnol Lett 2017; 40:75-82. [PMID: 28905142 DOI: 10.1007/s10529-017-2436-9] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2017] [Accepted: 08/31/2017] [Indexed: 11/29/2022]
Abstract
OBJECTIVE To determine the effects of the extra N-terminal seven-amino-acid sequence on the function of chitosanase CsnA. RESULTS Sequence and structure analysis indicated that the mature CsnA contains a seven-amino-acid extension in a disordered form at the N-terminus. To determine the function of this sequence, both mature CsnA and its N-terminus-truncated mutant, CsnAΔN, were expressed in Escherichia coli and characterized. Compared with CsnAΔN, CsnA exhibited a 15 °C higher temperature optimum, enhanced pH stability, thermostability and catalytic efficiency. The underlying mechanisms responsible for these changes were analyzed by circular dichroism (CD) spectroscopy. CD analysis revealed that the deletion of the N-terminal sequence resulted in a decrease in the Tm of 4.3 °C and this sequence altered the secondary structure of the enzyme. CONCLUSIONS The N-terminal sequence is essential for the stability and activity of chitosanase CsnA.
Collapse
Affiliation(s)
- Yujuan Han
- Key Laboratory of Glycoscience & Glycotechnology of Shandong Province; Key Laboratory of Marine Drugs, Chinese Ministry of Education; Laboratory for Marine Drugs and Bioproducts, Qingdao National Laboratory for Marine Science and Technology; Department of Glycobiology; School of Medicine and Pharmacy, Ocean University of China, 5 Yushan Road, Qingdao, 266003, China
| | - Peixin Gao
- Key Laboratory of Glycoscience & Glycotechnology of Shandong Province; Key Laboratory of Marine Drugs, Chinese Ministry of Education; Laboratory for Marine Drugs and Bioproducts, Qingdao National Laboratory for Marine Science and Technology; Department of Glycobiology; School of Medicine and Pharmacy, Ocean University of China, 5 Yushan Road, Qingdao, 266003, China
| | - Wengong Yu
- Key Laboratory of Glycoscience & Glycotechnology of Shandong Province; Key Laboratory of Marine Drugs, Chinese Ministry of Education; Laboratory for Marine Drugs and Bioproducts, Qingdao National Laboratory for Marine Science and Technology; Department of Glycobiology; School of Medicine and Pharmacy, Ocean University of China, 5 Yushan Road, Qingdao, 266003, China
| | - Xinzhi Lu
- Key Laboratory of Glycoscience & Glycotechnology of Shandong Province; Key Laboratory of Marine Drugs, Chinese Ministry of Education; Laboratory for Marine Drugs and Bioproducts, Qingdao National Laboratory for Marine Science and Technology; Department of Glycobiology; School of Medicine and Pharmacy, Ocean University of China, 5 Yushan Road, Qingdao, 266003, China.
| |
Collapse
|
22
|
Xu Y, Liu Y, Rasool A, E W, Li C. Sequence editing strategy for improving performance of β-glucuronidase from Aspergillus terreus. Chem Eng Sci 2017. [DOI: 10.1016/j.ces.2017.04.011] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
|
23
|
Wu YR, Zhou ZR, Zhao M, Lin B, Zhong M, Hu Z. Molecular characterization of the thermostability and carbohydrate-binding module from a newly identified GH118 family agarase, AgaXa. Process Biochem 2017. [DOI: 10.1016/j.procbio.2016.10.021] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
|
24
|
Wang X, Huang H, Xie X, Ma R, Bai Y, Zheng F, You S, Zhang B, Xie H, Yao B, Luo H. Improvement of the catalytic performance of a hyperthermostable GH10 xylanase from Talaromyces leycettanus JCM12802. BIORESOURCE TECHNOLOGY 2016; 222:277-284. [PMID: 27723474 DOI: 10.1016/j.biortech.2016.10.003] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/02/2016] [Revised: 09/30/2016] [Accepted: 10/01/2016] [Indexed: 05/07/2023]
Abstract
A xylanase gene of GH 10, Tlxyn10A, was cloned from Talaromyces leycettanus JCM12802 and expressed in Pichia pastoris. Purified recombinant TlXyn10A was acidic and hyperthermophilic, and retained stable over the pH range of 2.0-6.0 and at 90°C. Sequence analysis of TlXyn10A identified seven residues probably involved in substrate contacting. Three mutants (TlXyn10A_P, _N and _C) were then constructed by substituting some or all of the residues with corresponding ones of hyperthermal Xyl10C from Bispora sp. MEY-1. TlXyn10A_P with mutations at subsites +2 to +4 exhibited improved specific activity (by 0.44-fold) and pH stability (2.0-10.0). Molecular dynamics simulation analysis indicated that mutations E229I and F232E probably weaken the substrate affinity at subsites +3 to +4, and G149D may introduce a new hydrogen bond. These modifications altogether account for the improved performance of TlXyn10A_P. Moreover, TlXyn10A_P was able to hydrolyze wheat straw persistently, and has the application potentials in various industries.
Collapse
Affiliation(s)
- Xiaoyu Wang
- Key Laboratory for Feed Biotechnology of the Ministry of Agriculture, Feed Research Institute, Chinese Academy of Agricultural Sciences, Beijing 100081, People's Republic of China; College of Biological Sciences and Biotechnology, Beijing Forestry University, Beijing 100083, People's Republic of China
| | - Huoqing Huang
- Key Laboratory for Feed Biotechnology of the Ministry of Agriculture, Feed Research Institute, Chinese Academy of Agricultural Sciences, Beijing 100081, People's Republic of China
| | - Xiangming Xie
- College of Biological Sciences and Biotechnology, Beijing Forestry University, Beijing 100083, People's Republic of China
| | - Rui Ma
- Key Laboratory for Feed Biotechnology of the Ministry of Agriculture, Feed Research Institute, Chinese Academy of Agricultural Sciences, 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, Beijing 100081, People's Republic of China
| | - Fei Zheng
- Key Laboratory for Feed Biotechnology of the Ministry of Agriculture, Feed Research Institute, Chinese Academy of Agricultural Sciences, Beijing 100081, People's Republic of China; College of Biological Sciences and Biotechnology, Beijing Forestry University, Beijing 100083, People's Republic of China
| | - Shuai You
- Key Laboratory for Feed Biotechnology of the Ministry of Agriculture, Feed Research Institute, Chinese Academy of Agricultural Sciences, Beijing 100081, People's Republic of China
| | - Bingyu Zhang
- Key Laboratory for Feed Biotechnology of the Ministry of Agriculture, Feed Research Institute, Chinese Academy of Agricultural Sciences, Beijing 100081, People's Republic of China
| | - Huifang Xie
- Key Laboratory for Feed Biotechnology of the Ministry of Agriculture, Feed Research Institute, Chinese Academy of Agricultural Sciences, 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, 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, Beijing 100081, People's Republic of China.
| |
Collapse
|
25
|
Yu T, Anbarasan S, Wang Y, Telli K, Aslan AS, Su Z, Zhou Y, Zhang L, Iivonen P, Havukainen S, Mentunen T, Hummel M, Sixta H, Binay B, Turunen O, Xiong H. Hyperthermostable Thermotoga maritima xylanase XYN10B shows high activity at high temperatures in the presence of biomass-dissolving hydrophilic ionic liquids. Extremophiles 2016; 20:515-24. [PMID: 27240671 PMCID: PMC4921120 DOI: 10.1007/s00792-016-0841-y] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2016] [Accepted: 05/15/2016] [Indexed: 01/16/2023]
Abstract
The gene of Thermotoga maritima GH10 xylanase (TmXYN10B) was synthesised to study the extreme limits of this hyperthermostable enzyme at high temperatures in the presence of biomass-dissolving hydrophilic ionic liquids (ILs). TmXYN10B expressed from Pichia pastoris showed maximal activity at 100 °C and retained 92 % of maximal activity at 105 °C in a 30-min assay. Although the temperature optimum of activity was lowered by 1-ethyl-3-methylimidazolium acetate ([EMIM]OAc), TmXYN10B retained partial activity in 15-35 % hydrophilic ILs, even at 75-90 °C. TmXYN10B retained over 80 % of its activity at 90 °C in 15 % [EMIM]OAc and 15-25 % 1-ethyl-3-methylimidazolium dimethylphosphate ([EMIM]DMP) during 22-h reactions. [EMIM]OAc may rigidify the enzyme and lower V max. However, only minor changes in kinetic parameter K m showed that competitive inhibition by [EMIM]OAc of TmXYN10B is minimal. In conclusion, when extended enzymatic reactions under extreme conditions are required, TmXYN10B shows extraordinary potential.
Collapse
Affiliation(s)
- Tianyi Yu
- South-Central University for Nationalities, College of Life Science, Wuhan, 430074, China
| | - Sasikala Anbarasan
- Department of Biotechnology and Chemical Technology, School of Chemical Technology, Aalto University, 00076, Aalto, Finland
| | - Yawei Wang
- South-Central University for Nationalities, College of Life Science, Wuhan, 430074, China
| | - Kübra Telli
- Department of Biotechnology and Chemical Technology, School of Chemical Technology, Aalto University, 00076, Aalto, Finland
| | - Aşkın Sevinç Aslan
- Department of Biotechnology and Chemical Technology, School of Chemical Technology, Aalto University, 00076, Aalto, Finland
| | - Zhengding Su
- Hubei University of Technology, Wuhan, 430068, China
| | - Yin Zhou
- Wuhan Sunhy Biology Co., Ltd, Wuhan, 430074, China
| | - Li Zhang
- South-Central University for Nationalities, College of Life Science, Wuhan, 430074, China
| | - Piia Iivonen
- Department of Biotechnology and Chemical Technology, School of Chemical Technology, Aalto University, 00076, Aalto, Finland
| | - Sami Havukainen
- Department of Biotechnology and Chemical Technology, School of Chemical Technology, Aalto University, 00076, Aalto, Finland
| | - Tero Mentunen
- Department of Biotechnology and Chemical Technology, School of Chemical Technology, Aalto University, 00076, Aalto, Finland
| | - Michael Hummel
- Department of Forest Products Technology, School of Chemical Technology, Aalto University, 00076, Aalto, Finland
| | - Herbert Sixta
- Department of Forest Products Technology, School of Chemical Technology, Aalto University, 00076, Aalto, Finland
| | - Baris Binay
- Department of Bioengineering, Gebze Technical University, 41400, Gebze Kocaeli, Turkey
| | - Ossi Turunen
- Department of Biotechnology and Chemical Technology, School of Chemical Technology, Aalto University, 00076, Aalto, Finland.
| | - Hairong Xiong
- South-Central University for Nationalities, College of Life Science, Wuhan, 430074, China.
| |
Collapse
|
26
|
Feng X, Tang H, Han B, Lv B, Li C. Enhancing the Thermostability of β-Glucuronidase by Rationally Redesigning the Catalytic Domain Based on Sequence Alignment Strategy. Ind Eng Chem Res 2016. [DOI: 10.1021/acs.iecr.6b00535] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Affiliation(s)
- Xudong Feng
- School of Life Science, Beijing Institute of Technology, Beijing 100081, People’s Republic of China
| | - Heng Tang
- School of Life Science, Beijing Institute of Technology, Beijing 100081, People’s Republic of China
| | - Beijia Han
- School of Life Science, Beijing Institute of Technology, Beijing 100081, People’s Republic of China
| | - Bo Lv
- School of Life Science, Beijing Institute of Technology, Beijing 100081, People’s Republic of China
| | - Chun Li
- School of Life Science, Beijing Institute of Technology, Beijing 100081, People’s Republic of China
| |
Collapse
|
27
|
Kumar V, Marín-Navarro J, Shukla P. Thermostable microbial xylanases for pulp and paper industries: trends, applications and further perspectives. World J Microbiol Biotechnol 2016; 32:34. [PMID: 26754672 DOI: 10.1007/s11274-015-2005-0] [Citation(s) in RCA: 80] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2015] [Accepted: 12/23/2015] [Indexed: 10/22/2022]
Abstract
Xylanases are enzymes with biotechnological relevance in a number of fields, including food, feed, biofuel, and textile industries. Their most significant application is in the paper and pulp industry, where they are used as a biobleaching agent, showing clear economic and environmental advantages over chemical alternatives. Since this process requires high temperatures and alkali media, the identification of thermostable and alkali stable xylanases represents a major biotechnological goal in this field. Moreover, thermostability is a desirable property for many other applications of xylanases. The review makes an overview of xylanase producing microorganisms and their current implementation in paper biobleaching. Future perspectives are analyzed focusing in the efforts carried out to generate thermostable enzymes by means of modern biotechnological tools, including metagenomic analysis, enzyme molecular engineering and nanotechnology. Furthermore, structural and mutagenesis studies have revealed critical sites for stability of xylanases from glycoside hydrolase families GH10 and GH11, which constitute the main classes of these enzymes. The overall conclusions of these works are summarized here and provide relevant information about putative weak spots within xylanase structures to be targeted in future protein engineering approaches.
Collapse
Affiliation(s)
- Vishal Kumar
- Enzyme Technology and Protein Bioinformatics Laboratory, Department of Microbiology, Maharshi Dayanand University, Rohtak, Haryana, 124001, India
| | - Julia Marín-Navarro
- Instituto de Agroquímica y Tecnología de Alimentos, C.S.I.C., Av. Catedrático Agustín Escardino, 7, E6980, Paterna, Valencia, Spain
| | - Pratyoosh Shukla
- Enzyme Technology and Protein Bioinformatics Laboratory, Department of Microbiology, Maharshi Dayanand University, Rohtak, Haryana, 124001, India.
| |
Collapse
|
28
|
Classification, mode of action and production strategy of xylanase and its application for biofuel production from water hyacinth. Int J Biol Macromol 2016; 82:1041-54. [DOI: 10.1016/j.ijbiomac.2015.10.086] [Citation(s) in RCA: 93] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2015] [Revised: 10/26/2015] [Accepted: 10/27/2015] [Indexed: 01/07/2023]
|
29
|
Zheng F, Huang J, Liu X, Hu H, Long L, Chen K, Ding S. N- and C-terminal truncations of a GH10 xylanase significantly increase its activity and thermostability but decrease its SDS resistance. Appl Microbiol Biotechnol 2015; 100:3555-65. [DOI: 10.1007/s00253-015-7176-y] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2015] [Revised: 11/09/2015] [Accepted: 11/13/2015] [Indexed: 11/28/2022]
|
30
|
Mahanta P, Bhardwaj A, Kumar K, Reddy VS, Ramakumar S. Structural insights into N-terminal to C-terminal interactions and implications for thermostability of a (β/α)8-triosephosphate isomerase barrel enzyme. FEBS J 2015; 282:3543-55. [DOI: 10.1111/febs.13355] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2015] [Revised: 06/12/2015] [Accepted: 06/19/2015] [Indexed: 12/01/2022]
Affiliation(s)
- Pranjal Mahanta
- Department of Physics; Indian Institute of Science; Bangalore India
| | - Amit Bhardwaj
- Plant Transformation Group; International Centre for Genetic Engineering and Biotechnology; New Delhi India
| | - Krishan Kumar
- Plant Transformation Group; International Centre for Genetic Engineering and Biotechnology; New Delhi India
| | - Vanga S. Reddy
- Plant Transformation Group; International Centre for Genetic Engineering and Biotechnology; New Delhi India
| | | |
Collapse
|
31
|
Waldhauer MC, Schmitz SN, Ahlmann-Eltze C, Gleixner JG, Schmelas CC, Huhn AG, Bunne C, Büscher M, Horn M, Klughammer N, Kreft J, Schäfer E, Bayer PA, Krämer SG, Neugebauer J, Wehler P, Mayer MP, Eils R, Di Ventura B. Backbone circularization of Bacillus subtilis family 11 xylanase increases its thermostability and its resistance against aggregation. MOLECULAR BIOSYSTEMS 2015; 11:3231-43. [DOI: 10.1039/c5mb00341e] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
While using a serine (S) as linker for circularization increases the thermostability, a longer linker (RGKCWE) leads to reduced aggregation after heat shock at elevated temperatures.
Collapse
|