1
|
Long L, Lin Q, Wang J, Ding S. Microbial α-L-arabinofuranosidases: diversity, properties, and biotechnological applications. World J Microbiol Biotechnol 2024; 40:84. [PMID: 38294733 DOI: 10.1007/s11274-023-03882-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2023] [Accepted: 12/28/2023] [Indexed: 02/01/2024]
Abstract
Arabinoxylans (AXs) are hemicellulosic polysaccharides consisting of a linear backbone of β-1,4-linked xylose residues branched by high content of α-L-arabinofuranosyl (Araf) residues along with other side-chain substituents, and are abundantly found in various agricultural crops especially cereals. The efficient bioconversion of AXs into monosaccharides, oligosaccharides and/or other chemicals depends on the synergism of main-chain enzymes and de-branching enzymes. Exo-α-L-arabinofuranosidases (ABFs) catalyze the hydrolysis of terminal non-reducing α-1,2-, α-1,3- or α-1,5- linked α-L-Araf residues from arabinose-substituted polysaccharides or oligosaccharides. ABFs are critically de-branching enzymes in bioconversion of agricultural biomass, and have received special attention due to their application potentials in biotechnological industries. In recent years, the researches on microbial ABFs have developed quickly in the aspects of the gene mining, properties of novel members, catalytic mechanisms, methodologies, and application technologies. In this review, we systematically summarize the latest advances in microbial ABFs, and discuss the future perspectives of the enzyme research.
Collapse
Affiliation(s)
- Liangkun Long
- Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, College of Chemical Engineering, Nanjing Forestry University, Nanjing, 210037, People's Republic of China.
- Jiangsu Province Key Laboratory of Green Biomass-Based Fuels and Chemicals, Nanjing, 210037, People's Republic of China.
| | - Qunying Lin
- Nanjing Institute for the Comprehensive Utilization of Wild Plants, China CO-OP, Nanjing, 211111, People's Republic of China
| | - Jing Wang
- Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, College of Chemical Engineering, Nanjing Forestry University, Nanjing, 210037, People's Republic of China
| | - Shaojun Ding
- Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, College of Chemical Engineering, Nanjing Forestry University, Nanjing, 210037, People's Republic of China
- Jiangsu Province Key Laboratory of Green Biomass-Based Fuels and Chemicals, Nanjing, 210037, People's Republic of China
| |
Collapse
|
2
|
Zhang Z, Shan P, Zhang ZH, He R, Xing L, Liu J, He D, Ma H, Wang Z, Gao X. Efficient degradation of soybean protein B 3 subunit in soy sauce by ultrasound-assisted prolyl endopeptidase and its primary mechanism. Food Chem 2023; 429:136972. [PMID: 37506662 DOI: 10.1016/j.foodchem.2023.136972] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2023] [Revised: 07/07/2023] [Accepted: 07/20/2023] [Indexed: 07/30/2023]
Abstract
Prolyl endopeptidase can partially degrade soybean protein B3 subunit and alleviate soy sauce secondary precipitate. In this study, the influences of ultrasound-assisted prolyl endopeptidase on the degradation of soybean protein B3 subunit of soy sauce and primary mechanism were investigated using SDS-PAGE, MALDI-TOF-MS, circular dichromatic spectrometer, fluorescence spectra, etc. Results showed that ultrasound-assisted prolyl endopeptidase enhanced 72% degradation rate of B3 subunit and reduced soy sauce secondary precipitate remarkably, meanwhile significantly increased content of organic taste compounds of soy sauce compared with control (p < 0.05). Sonication markedly reduced percentage of α-helix and increased percentage of random coil, made hydrophobic amino acids inside prolyl endopeptidase exposed to its surface and enhanced its flexibility, which facilitated the binding of prolyl endopeptidase active center with B3 subunit and finally enhanced the latter's degradation rate and appearance quality of soy sauce. This work laid a foundation for solving soy sauce secondary precipitate.
Collapse
Affiliation(s)
- Zhankai Zhang
- School of Food and Biological Engineering, Jiangsu University, 301 Xuefu Road, Zhenjiang 212013, China
| | - Pei Shan
- School of Food and Biological Engineering, Jiangsu University, 301 Xuefu Road, Zhenjiang 212013, China
| | - Zhi-Hong Zhang
- School of Food and Biological Engineering, Jiangsu University, 301 Xuefu Road, Zhenjiang 212013, China
| | - Ronghai He
- School of Food and Biological Engineering, Jiangsu University, 301 Xuefu Road, Zhenjiang 212013, China
| | - Limin Xing
- Honworld Group Limited, 299 Zhongxing Avenue, Huzhou 313000, China
| | - Jianbin Liu
- Honworld Group Limited, 299 Zhongxing Avenue, Huzhou 313000, China
| | - Degui He
- Honworld Group Limited, 299 Zhongxing Avenue, Huzhou 313000, China
| | - Haile Ma
- School of Food and Biological Engineering, Jiangsu University, 301 Xuefu Road, Zhenjiang 212013, China
| | - Zejian Wang
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai 200237, China.
| | - Xianli Gao
- School of Food and Biological Engineering, Jiangsu University, 301 Xuefu Road, Zhenjiang 212013, China.
| |
Collapse
|
3
|
Wen J, Miao T, Basit A, Li Q, Tan S, Chen S, Ablimit N, Wang H, Wang Y, Zheng F, Jiang W. Highly efficient synergistic activity of an α-L-arabinofuranosidase for degradation of arabinoxylan in barley/wheat. Front Microbiol 2023; 14:1230738. [PMID: 38029111 PMCID: PMC10655120 DOI: 10.3389/fmicb.2023.1230738] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2023] [Accepted: 09/13/2023] [Indexed: 12/01/2023] Open
Abstract
Here, an α-L-arabinofuranosidase (termed TtAbf62) from Thermothelomyces thermophilus is described, which efficiently removes arabinofuranosyl side chains and facilitates arabinoxylan digestion. The specific activity of TtAbf62 (179.07 U/mg) toward wheat arabinoxylan was the highest among all characterized glycoside hydrolase family 62 enzymes. TtAbf62 in combination with endoxylanase and β-xylosidase strongly promoted hydrolysis of barley and wheat. The release of reducing sugars was significantly higher for the three-enzyme combination relative to the sum of single-enzyme treatments: 85.71% for barley hydrolysis and 33.33% for wheat hydrolysis. HPLC analysis showed that TtAbf62 acted selectively on monosubstituted (C-2 or C-3) xylopyranosyl residues rather than double-substituted residues. Site-directed mutagenesis and interactional analyses of enzyme-substrate binding structures revealed the catalytic sites of TtAbf62 formed different polysaccharide-catalytic binding modes with arabinoxylo-oligosaccharides. Our findings demonstrate a "multienzyme cocktail" formed by TtAbf62 with other hydrolases strongly improves the efficiency of hemicellulose conversion and increases biomass hydrolysis through synergistic interaction.
Collapse
Affiliation(s)
- Jiaqi Wen
- State Key Laboratory of Animal Biotech Breeding, College of Biological Sciences, China Agricultural University, Beijing, China
| | - Ting Miao
- State Key Laboratory of Animal Biotech Breeding, College of Biological Sciences, China Agricultural University, Beijing, China
| | - Abdul Basit
- State Key Laboratory of Animal Biotech Breeding, College of Biological Sciences, China Agricultural University, Beijing, China
- Department of Microbiology, University of Jhang, Jhang, Punjab, Pakistan
| | - Qunhong Li
- Little Tiger Biotechnology Company Limited, Hangzhou, Zhejiang, China
| | - Shenglin Tan
- Little Tiger Biotechnology Company Limited, Hangzhou, Zhejiang, China
| | - Shuqing Chen
- Little Tiger Biotechnology Company Limited, Hangzhou, Zhejiang, China
| | - Nuraliya Ablimit
- State Key Laboratory of Animal Biotech Breeding, College of Biological Sciences, China Agricultural University, Beijing, China
| | - Hui Wang
- State Key Laboratory of Animal Biotech Breeding, College of Biological Sciences, China Agricultural University, Beijing, China
| | - Yan Wang
- State Key Laboratory of Animal Biotech Breeding, College of Biological Sciences, China Agricultural University, Beijing, China
| | - Fengzhen Zheng
- State Key Laboratory of Animal Biotech Breeding, College of Biological Sciences, China Agricultural University, Beijing, China
- College of Biological and Environmental Engineering, Zhejiang Shuren University, Hangzhou, China
| | - Wei Jiang
- State Key Laboratory of Animal Biotech Breeding, College of Biological Sciences, China Agricultural University, Beijing, China
| |
Collapse
|
4
|
Shan P, Ho CT, Zhang L, Gao X, Lin H, Xu T, Wang B, Fu J, He R, Zhang Y. Degradation Mechanism of Soybean Protein B 3 Subunit Catalyzed by Prolyl Endopeptidase from Aspergillus niger during Soy Sauce Fermentation. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2022; 70:5869-5878. [PMID: 35511597 DOI: 10.1021/acs.jafc.2c01796] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Soy sauce secondary precipitate formed due to the B3 subunit seriously affects soy sauce's appearance quality. In this study, a prolyl endopeptidase (APE) from Aspergillus niger, which could degrade approximately 50% of the B3 subunit and increase proline content by 24% in soy sauce, was isolated and identified. The results showed that APE was an acidic salt-tolerant serine protease (62 kDa), which was optimally active at 40 °C and pH 4.0, and retained more than 69% activity in 3 M NaCl solution over 10 days. As a potential substrate of APE, the B3 subunit contains 10 proline residues. High salinity could not damage the hydrogen bonds, salt bridges, and interior hydrophobicity of APE; thus, the spatial structures and activity of APE in 3 M NaCl solution were stable within 3 days and decreased thereafter. High salinity made the B3 subunit more rigid and lowered the catalytic activity of APE on the B3 subunit, hindering complete hydrolysis of the B3 subunit. This was the first report about the APE capable of degrading the B3 subunit and reducing the secondary precipitate of soy sauce, providing a new possibility to solve the secondary precipitate of soy sauce.
Collapse
Affiliation(s)
- Pei Shan
- School of Food and Biological Engineering, Jiangsu University, 301 Xuefu Road, Zhenjiang 212013, China
| | - Chi-Tang Ho
- Department of Food Science, Rutgers University, New Brunswick, New Jersey 08901, United States
| | - Lei Zhang
- School of Food and Biological Engineering, Jiangsu University, 301 Xuefu Road, Zhenjiang 212013, China
| | - Xianli Gao
- School of Food and Biological Engineering, Jiangsu University, 301 Xuefu Road, Zhenjiang 212013, China
| | - Hong Lin
- Guangdong Meiweixian Flavoring Foods Co., Ltd., 1 Chubang Road, Zhongshan 528437, China
| | - Ting Xu
- Guangdong Meiweixian Flavoring Foods Co., Ltd., 1 Chubang Road, Zhongshan 528437, China
| | - Bo Wang
- School of Food and Biological Engineering, Jiangsu University, 301 Xuefu Road, Zhenjiang 212013, China
| | - Jiangyan Fu
- Guangdong Meiweixian Flavoring Foods Co., Ltd., 1 Chubang Road, Zhongshan 528437, China
| | - Ronghai He
- School of Food and Biological Engineering, Jiangsu University, 301 Xuefu Road, Zhenjiang 212013, China
| | - Yaqiong Zhang
- School of Food and Biological Engineering, Jiangsu University, 301 Xuefu Road, Zhenjiang 212013, China
| |
Collapse
|
5
|
A Novel Multifunctional Arabinofuranosidase/Endoxylanase/β-Xylosidase GH43 Enzyme from Paenibacillus curdlanolyticus B-6 and Its Synergistic Action To Produce Arabinose and Xylose from Cereal Arabinoxylan. Appl Environ Microbiol 2021; 87:e0173021. [PMID: 34613758 DOI: 10.1128/aem.01730-21] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
PcAxy43B is a modular protein comprising a catalytic domain of glycoside hydrolase family 43 (GH43), a family 6 carbohydrate-binding module (CBM6), and a family 36 carbohydrate-binding module (CBM36) and found to be a novel multifunctional xylanolytic enzyme from Paenibacillus curdlanolyticus B-6. This enzyme exhibited α-l-arabinofuranosidase, endoxylanase, and β-d-xylosidase activities. The α-l-arabinofuranosidase activity of PcAxy43B revealed a new property of GH43, via the release of both long-chain cereal arabinoxylan and short-chain arabinoxylooligosaccharide (AXOS), as well as release from both the C(O)2 and C(O)3 positions of AXOS, which is different from what has been seen for other arabinofuranosidases. PcAxy43B liberated a series of xylooligosaccharides (XOSs) from birchwood xylan and xylohexaose, indicating that PcAxy43B exhibited endoxylanase activity. PcAxy43B produced xylose from xylobiose and reacted with p-nitrophenyl-β-d-xylopyranoside as a result of β-xylosidase activity. PcAxy43B effectively released arabinose together with XOSs and xylose from the highly arabinosyl-substituted rye arabinoxylan. Moreover, PcAxy43B showed significant synergistic action with the trifunctional endoxylanase/β-xylosidase/α-l-arabinofuranosidase PcAxy43A and the endoxylanase Xyn10C from strain B-6, in which almost all products produced from rye arabinoxylan by these combined enzymes were arabinose and xylose. In addition, the presence of CBM36 was found to be necessary for the endoxylanase property of PcAxy43B. PcAxy43B is capable of hydrolyzing untreated cereal biomass, corn hull, and rice straw into XOSs and xylose. Hence, PcAxy43B, a significant accessory multifunctional xylanolytic enzyme, is a potential candidate for application in the saccharification of cereal biomass. IMPORTANCE Enzymatic saccharification of cereal biomass is a strategy for the production of fermented sugars from low-price raw materials. In the present study, PcAxy43B from P. curdlanolyticus B-6 was found to be a novel multifunctional α-l-arabinofuranosidase/endoxylanase/β-d-xylosidase enzyme of glycoside hydrolase family 43. It is effective in releasing arabinose, xylose, and XOSs from the highly arabinosyl-substituted rye arabinoxylan, which is usually resistant to hydrolysis by xylanolytic enzymes. Moreover, almost all products produced from rye arabinoxylan by the combination of PcAxy43B with the trifunctional xylanolytic enzyme PcAxy43A and the endoxylanase Xyn10C from strain B-6 were arabinose and xylose, which can be used to produce several value-added products. In addition, PcAxy43B is capable of hydrolyzing untreated cereal biomass into XOSs and xylose. Thus, PcAxy43B is an important multifunctional xylanolytic enzyme with high potential in biotechnology.
Collapse
|
6
|
Molecular modification, structural characterization, and biological activity of xylans. Carbohydr Polym 2021; 269:118248. [PMID: 34294285 DOI: 10.1016/j.carbpol.2021.118248] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2020] [Revised: 05/21/2021] [Accepted: 05/23/2021] [Indexed: 12/17/2022]
Abstract
The differences in the source and structure of xylans make them have various biological activities. However, due to their inherent structural limitations, the various biological activities of xylans are far lower than those of commercial drugs. Currently, several types of molecular modification methods have been developed to address these limitations, and many derivatives with specific biological activity have been obtained. Further research on structural characteristics, structure-activity relationship and mechanism of action is of great significance for the development of xylan derivatives. Therefore, the major molecular modification methods of xylans are introduced in this paper, and the primary structure and conformation characteristics of xylans and their derivatives are summarized. In addition, the biological activity and structure-activity relationship of the modified xylans are also discussed.
Collapse
|
7
|
Zhang Y, Yang J, Luo L, Wang E, Wang R, Liu L, Liu J, Yuan H. Low-Cost Cellulase-Hemicellulase Mixture Secreted by Trichoderma harzianum EM0925 with Complete Saccharification Efficacy of Lignocellulose. Int J Mol Sci 2020; 21:E371. [PMID: 31936000 PMCID: PMC7014229 DOI: 10.3390/ijms21020371] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2019] [Revised: 12/31/2019] [Accepted: 01/02/2020] [Indexed: 01/07/2023] Open
Abstract
Fermentable sugars are important intermediate products in the conversion of lignocellulosic biomass to biofuels and other value-added bio-products. The main bottlenecks limiting the production of fermentable sugars from lignocellulosic biomass are the high cost and the low saccharification efficiency of degradation enzymes. Herein, we report the secretome of Trichoderma harzianum EM0925 under induction of lignocellulose. Numerously and quantitatively balanced cellulases and hemicellulases, especially high levels of glycosidases, could be secreted by T. harzianum EM0925. Compared with the commercial enzyme preparations, the T. harzianum EM0925 enzyme cocktail presented significantly higher lignocellulolytic enzyme activities and hydrolysis efficiency against lignocellulosic biomass. Moreover, 100% yields of glucose and xylose were obtained simultaneously from ultrafine grinding and alkali pretreated corn stover. These findings demonstrate a natural cellulases and hemicellulases mixture for complete conversion of biomass polysaccharide, suggesting T. harzianum EM0925 enzymes have great potential for industrial applications.
Collapse
Affiliation(s)
- Yu Zhang
- State Key Laboratory of Agrobiotechnology and Key Laboratory of Soil Microbiology, Ministry of Agriculture, College of Biological Sciences, China Agricultural University, Beijing 100193, China; (Y.Z.); (J.Y.); (R.W.); (L.L.); (J.L.)
| | - Jinshui Yang
- State Key Laboratory of Agrobiotechnology and Key Laboratory of Soil Microbiology, Ministry of Agriculture, College of Biological Sciences, China Agricultural University, Beijing 100193, China; (Y.Z.); (J.Y.); (R.W.); (L.L.); (J.L.)
| | - Lijin Luo
- Fujian Institute of Microbiology, Fuzhou 350007, China;
| | - Entao Wang
- Departamento de Microbiología, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Mexico City 11340, Mexico;
| | - Ruonan Wang
- State Key Laboratory of Agrobiotechnology and Key Laboratory of Soil Microbiology, Ministry of Agriculture, College of Biological Sciences, China Agricultural University, Beijing 100193, China; (Y.Z.); (J.Y.); (R.W.); (L.L.); (J.L.)
| | - Liang Liu
- State Key Laboratory of Agrobiotechnology and Key Laboratory of Soil Microbiology, Ministry of Agriculture, College of Biological Sciences, China Agricultural University, Beijing 100193, China; (Y.Z.); (J.Y.); (R.W.); (L.L.); (J.L.)
| | - Jiawen Liu
- State Key Laboratory of Agrobiotechnology and Key Laboratory of Soil Microbiology, Ministry of Agriculture, College of Biological Sciences, China Agricultural University, Beijing 100193, China; (Y.Z.); (J.Y.); (R.W.); (L.L.); (J.L.)
| | - Hongli Yuan
- State Key Laboratory of Agrobiotechnology and Key Laboratory of Soil Microbiology, Ministry of Agriculture, College of Biological Sciences, China Agricultural University, Beijing 100193, China; (Y.Z.); (J.Y.); (R.W.); (L.L.); (J.L.)
| |
Collapse
|