1
|
Zhang G, Li Z, Chen G, Zhang L, Cai W, Deng S, Zhang H, Wu L, Li H, Liu H. Purification and characterization of the low molecular weight xylanase from Bacillus cereus L-1. Braz J Microbiol 2023; 54:2951-2959. [PMID: 37843795 PMCID: PMC10689628 DOI: 10.1007/s42770-023-01129-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2022] [Accepted: 09/10/2023] [Indexed: 10/17/2023] Open
Abstract
Xylanase is widely used in various industries such as food processing, paper, textiles, and leather tanning. In this study, Bacillus cereus L-1 strain was isolated and identified as capable of producing low molecular weight xylanase through 16 s rRNA sequencing. Maximum xylanase yield of 15.51 ± 2.08 U/mL was achieved under optimal fermentation conditions (5% inoculum, 20 g/L xylan, pH 6.0, for 24 h). After purification via ammonium sulfate precipitation and High-S ion exchange chromatography, electrophoretic purity xylanase was obtained with a 28-fold purification and specific activity of 244.97 U/mg. Xylanase had an optimal pH of 6.5 and temperature of 60 °C and displayed thermostability at 30 °C and 40 °C with 48.56% and 45.97% remaining activity after 180 min, respectively. The xylanase retained more than 82.97% of its activity after incubation for 24 h at pH 5.0 and was sensitive to metal ions, especially Mg2+ and Li+. Purified xylanase showed a molecular weight of 23 kDa on SDS-PAGE, and partial peptide sequencing revealed homology to the endo-1,4-beta-xylanase with a molecular weight of 23.3 kDa through LC/MS-MS (liquid chromatography-tandem mass spectrometry). This study suggests that the purified xylanase is easier to purify and enriches low molecular weight xylanases from bacteria source.
Collapse
Affiliation(s)
- Ge Zhang
- Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, 266101, China
| | - Zhihao Li
- Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, 266101, China
- Yichang Tobacco Company of Hubei Province, Yichang, 443000, China
| | - Guoqiang Chen
- Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, 266101, China
| | - Liang Zhang
- China Tobacco Sichuan Industrial Co., Ltd, Chengdu, 610000, China
| | - Wen Cai
- China Tobacco Sichuan Industrial Co., Ltd, Chengdu, 610000, China
| | - Shuaijun Deng
- Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, 266101, China
| | - Haibo Zhang
- Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, 266101, China
| | - Lijun Wu
- Technology Center of China Tobacco Yunnan Industrial Co., Ltd, Kunming, 650032, China.
| | - Hongtao Li
- Technology Center of China Tobacco Shandong Industrial Co., Ltd, Qingdao, 266101, China.
| | - Haobao Liu
- Key Laboratory of Tobacco Biology and Processing, Tobacco Research Institute of Chinese Academy of Agricultural Sciences, Qingdao, 266101, China.
| |
Collapse
|
2
|
Fasiku SA, Bello MA, Odeniyi OA. Production of xylanase by Aspergillus niger GIO and Bacillus megaterium through solid-state fermentation. Access Microbiol 2023; 5:acmi000506.v5. [PMID: 37424564 PMCID: PMC10323791 DOI: 10.1099/acmi.0.000506.v5] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2022] [Accepted: 04/04/2023] [Indexed: 07/11/2023] Open
Abstract
Xylanase breaks xylan down to xylose, which is used in industries such as pulp and paper, food and feed, among others. The utilization of wastes for xylanase production is economical, hence this work aimed at producing xylanase through solid-state fermentation and characterizing the enzyme. Xylanase-producing strains of Bacillus megaterium and Aspergillus niger GIO were inoculated separately in a 5 and 10 day solid fermentation study on maize straw, rice straw, sawdust, corn cob, sugarcane bagasse, conifer litters, alkaline-pretreated maize straw (APM) and combined alkaline and biological-pretreated maize straw, respectively. The best substrate was selected for xylanase production. The crude enzyme was extracted from the fermentation medium and xylanase activity was characterized using parameters such as temperature, cations, pH and surfactants. Among different substrates, the highest xylanase activity of 3.18 U ml-1 was recorded when A. niger GIO was grown on APM. The xylanase produced by A. niger GIO and B. megaterium had the highest activities (3.67 U ml-1 and 3.36 U ml-1) at 40 °C after 30 and 45 min of incubation, respectively. Optimal xylanase activities (4.58 and 3.58 U ml-1) of A. niger GIO and B. megaterium , respectively, were observed at pH 5.0 and 6.2. All cations used enhanced xylanase activities except magnesium ion. Sodium dodecyl sulfate supported the highest xylanase activity of 6.13 and 6.90 U ml-1 for A. niger GIO and B. megaterium , respectively. High yields of xylanase were obtained from A. niger GIO and B. megaterium cultivated on APM. The xylanase activities were affected by pH, temperature, surfactants and cations.
Collapse
Affiliation(s)
- Samuel Adedayo Fasiku
- Department of Biological Sciences, Ajayi Crowther University, Oyo Town, Oyo State, Nigeria
| | - Mobolaji Akeem Bello
- Department of Biological Sciences, Ajayi Crowther University, Oyo Town, Oyo State, Nigeria
| | - Olubusola Ayoola Odeniyi
- Department of Biological Sciences, Ajayi Crowther University, Oyo Town, Oyo State, Nigeria
- Department of Microbiology, University of Ibadan, Ibadan, Nigeria
| |
Collapse
|
3
|
Malik WA, Javed S. Biochemical Characterization of Cellulase From Bacillus subtilis Strain and its Effect on Digestibility and Structural Modifications of Lignocellulose Rich Biomass. Front Bioeng Biotechnol 2022; 9:800265. [PMID: 34988069 PMCID: PMC8721162 DOI: 10.3389/fbioe.2021.800265] [Citation(s) in RCA: 23] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2021] [Accepted: 11/25/2021] [Indexed: 11/13/2022] Open
Abstract
Microbial cellulases have become the mainstream biocatalysts due to their complex nature and widespread industrial applications. The present study reports the partial purification and characterization of cellulase from Bacillus subtilis CD001 and its application in biomass saccharification. Out of four different substrates, carboxymethyl cellulose, when amended as fermentation substrate, induced the highest cellulase production from B. subtilis CD001. The optimum activity of CMCase, FPase, and amylase was 2.4 U/ml, 1.5 U/ml, and 1.45 U/ml, respectively. The enzyme was partially purified by (NH4)2SO4 precipitation and sequenced through LC-MS/MS. The cellulase was found to be approximately 55 kDa by SDS-PAGE and capable of hydrolyzing cellulose, as confirmed by zymogram analysis. The enzyme was assigned an accession number AOR98335.1 and displayed 46% sequence homology with 14 peptide-spectrum matches having 12 unique peptide sequences. Characterization of the enzyme revealed it to be an acidothermophilic cellulase, having an optimum activity at pH 5 and a temperature of 60°C. Kinetic analysis of partially purified enzyme showed the Km and Vmax values of 0.996 mM and 1.647 U/ml, respectively. The enzyme activity was accelerated by ZnSO4, MnSO4, and MgSO4, whereas inhibited significantly by EDTA and moderately by β-mercaptoethanol and urea. Further, characterization of the enzyme saccharified sugarcane bagasse, wheat straw, and filter paper by SEM, ATR-FTIR, and XRD revealed efficient hydrolysis and structural modifications of cellulosic materials, indicating the potential industrial application of the B. subtilis CD001 cellulase. The findings demonstrated the potential suitability of cellulase from B. subtilis CD001 for use in current mainstream biomass conversion into fuels and other industrial processes.
Collapse
Affiliation(s)
- Waseem Ayoub Malik
- Department of Biochemistry, Faculty of Life Sciences, Aligarh Muslim University, Aligarh, India
| | - Saleem Javed
- Department of Biochemistry, Faculty of Life Sciences, Aligarh Muslim University, Aligarh, India
| |
Collapse
|
4
|
Ma L, Lu Y, Yan H, Wang X, Yi Y, Shan Y, Liu B, Zhou Y, Lü X. Screening of cellulolytic bacteria from rotten wood of Qinling (China) for biomass degradation and cloning of cellulases from Bacillus methylotrophicus. BMC Biotechnol 2020; 20:2. [PMID: 31910834 PMCID: PMC6947901 DOI: 10.1186/s12896-019-0593-8] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2019] [Accepted: 12/08/2019] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Cellulosic biomass degradation still needs to be paid more attentions as bioenergy is the most likely to replace fossil energy in the future, and more evaluable cellulolytic bacteria isolation will lay a foundation for this filed. Qinling Mountains have unique biodiversity, acting as promising source of cellulose-degrading bacteria exhibiting noteworthy properties. Therefore, the aim of this work was to find potential cellulolytic bacteria and verify the possibility of the cloning of cellulases from the selected powerful bacteria. RESULTS In present study, 55 potential cellulolytic bacteria were screened and identified from the rotten wood of Qinling Mountains. Based on the investigation of cellulase activities and degradation effect on different cellulose substrates, Bacillus methylotrophicus 1EJ7, Bacillus subtilis 1AJ3 and Bacillus subtilis 3BJ4 were further applied to hydrolyze wheat straw, corn stover and switchgrass, and the results suggested that B. methylotrophicus 1EJ7 was the most preponderant bacterium, and which also indicated that Bacillus was the main cellulolytic bacteria in rotten wood. Furthermore, scanning electron microscopy (SEM) and X-ray diffraction analysis of micromorphology and crystallinity of wheat straw also verified the significant hydrolyzation. With ascertaining the target sequence of cellulase β-glucosidase (243 aa) and endoglucanase (499 aa) were successfully heterogeneously cloned and expressed from B. methylotrophicus 1EJ7, and which performed a good effect on cellulose degradation with enzyme activity of 1670.15 ± 18.94 U/mL and 0.130 ± 0.002 U/mL, respectively. In addition, based on analysis of amino acid sequence, it found that β-glucosidase were belonged to GH16 family, and endoglucanase was composed of GH5 family catalytic domain and a carbohydrate-binding module of CBM3 family. CONCLUSIONS Based on the screening, identification and cellulose degradation effect evaluation of cellulolytic bacteria from rotten wood of Qinling Mountains, it found that Bacillus were the predominant species among the isolated strains, and B. methylotrophicus 1EJ7 performed best on cellulose degradation. Meanwhile, the β-glucosidase and endoglucanase were successfully cloned and expressed from B. methylotrophicus for the first time, which provided new materials of both strain and the recombinant enzymes for the study of cellulose degradation and its application in industry.
Collapse
Affiliation(s)
- Lingling Ma
- Lab of Bioresources, College of Food Science and Engineering, Northwest A&F University, Yangling, 712100, Shaanxi Province, China
| | - Yingying Lu
- Lab of Bioresources, College of Food Science and Engineering, Northwest A&F University, Yangling, 712100, Shaanxi Province, China
| | - Hong Yan
- Lab of Bioresources, College of Food Science and Engineering, Northwest A&F University, Yangling, 712100, Shaanxi Province, China
| | - Xin Wang
- Lab of Bioresources, College of Food Science and Engineering, Northwest A&F University, Yangling, 712100, Shaanxi Province, China
| | - Yanglei Yi
- Lab of Bioresources, College of Food Science and Engineering, Northwest A&F University, Yangling, 712100, Shaanxi Province, China
| | - Yuanyuan Shan
- Lab of Bioresources, College of Food Science and Engineering, Northwest A&F University, Yangling, 712100, Shaanxi Province, China
| | - Bianfang Liu
- Lab of Bioresources, College of Food Science and Engineering, Northwest A&F University, Yangling, 712100, Shaanxi Province, China
| | - Yuan Zhou
- Lab of Bioresources, College of Food Science and Engineering, Northwest A&F University, Yangling, 712100, Shaanxi Province, China
| | - Xin Lü
- Lab of Bioresources, College of Food Science and Engineering, Northwest A&F University, Yangling, 712100, Shaanxi Province, China.
| |
Collapse
|
5
|
Adiguzel G, Faiz O, Sisecioglu M, Sari B, Baltaci O, Akbulut S, Genc B, Adiguzel A. A novel endo-β-1,4-xylanase from Pediococcus acidilactici GC25; purification, characterization and application in clarification of fruit juices. Int J Biol Macromol 2019; 129:571-578. [DOI: 10.1016/j.ijbiomac.2019.02.054] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2018] [Revised: 01/11/2019] [Accepted: 02/08/2019] [Indexed: 11/28/2022]
|
6
|
Xiong K, Xiong S, Gao S, Li Q, Sun B, Li X. Improving Hydrolysis Characteristics of Xylanases by Site-Directed Mutagenesis in Binding-Site Subsites from Streptomyces L10608. Int J Mol Sci 2018. [PMID: 29533991 PMCID: PMC5877695 DOI: 10.3390/ijms19030834] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
The preparation of oligosaccharides via xylan hydrolysis is an effective way to add value to hemicellulosic material of agricultural waste. The bacterial strain Streptomyces L10608, isolated from soil, contains genes encoding xylanases of glucoside hydrolase family 10/11 (GH10/11), and these have been cloned to catalyze the production of xylooligosaccharide (XOS). To improve the XOS proportion of hydrolysates produced by xylanase, four amino acid residues were substituted by site-directed mutagenesis, and the mutant genes were overexpressed in Escherichia coli. Mutations replaced the codons encoding Asn214 (+2) and Asn86 (−2) by Ala and removed the Ricin B-lectin domain in GH10-xyn, and mutants Y115A (−2) and Y123A (−2) were produced for GH11-xyn. Interestingly, GH10-N86Q had significantly increased hydrolysis of XOS and almost eliminated xylose (X1) to <2.5%, indicating that the −2 binding site of GH10-xyn of L10608 is required for binding with xylotriose (X3). The hydrolytic activity of GH10-N86Q was increased approximately 1.25-fold using beechwood xylan as a substrate and had high affinity for the substrate with a low Km of about 1.85 mg·mL−1. Otherwise, there were no significant differences in enzymatic properties between GH10-N86Q and GH10-xyn. These mutants offer great potential for modification of xylanase with desired XOS hydrolysis.
Collapse
Affiliation(s)
- Ke Xiong
- Beijing Innovation Centre of Food Nutrition and Human, Beijing Technology & Business University (BTBU), No. 33 Fucheng Road, Haidian, Beijing 100048, China.
- Beijing Laboratory for Food Quality and Safety, Beijing Technology & Business University (BTBU), No. 33 Fucheng Road, Haidian, Beijing 100048, China.
| | - Suyue Xiong
- Beijing Innovation Centre of Food Nutrition and Human, Beijing Technology & Business University (BTBU), No. 33 Fucheng Road, Haidian, Beijing 100048, China.
- Beijing Engineering and Technology Research Center of Food Additives, Beijing Technology & Business University (BTBU), No. 33 Fucheng Road, Haidian, Beijing 100048, China.
| | - Siyu Gao
- Beijing Innovation Centre of Food Nutrition and Human, Beijing Technology & Business University (BTBU), No. 33 Fucheng Road, Haidian, Beijing 100048, China.
- Beijing Key Laboratory of Flavor Chemistry, Beijing Technology and Business University (BTBU), No. 33 Fucheng Road, Haidian, Beijing 100048, China.
| | - Qin Li
- Beijing Innovation Centre of Food Nutrition and Human, Beijing Technology & Business University (BTBU), No. 33 Fucheng Road, Haidian, Beijing 100048, China.
- Beijing Engineering and Technology Research Center of Food Additives, Beijing Technology & Business University (BTBU), No. 33 Fucheng Road, Haidian, Beijing 100048, China.
| | - Baoguo Sun
- Beijing Innovation Centre of Food Nutrition and Human, Beijing Technology & Business University (BTBU), No. 33 Fucheng Road, Haidian, Beijing 100048, China.
- Beijing Laboratory for Food Quality and Safety, Beijing Technology & Business University (BTBU), No. 33 Fucheng Road, Haidian, Beijing 100048, China.
| | - Xiuting Li
- Beijing Innovation Centre of Food Nutrition and Human, Beijing Technology & Business University (BTBU), No. 33 Fucheng Road, Haidian, Beijing 100048, China.
- Beijing Laboratory for Food Quality and Safety, Beijing Technology & Business University (BTBU), No. 33 Fucheng Road, Haidian, Beijing 100048, China.
| |
Collapse
|
7
|
Yegin S. Single-step purification and characterization of an extreme halophilic, ethanol tolerant and acidophilic xylanase from Aureobasidium pullulans NRRL Y-2311-1 with application potential in the food industry. Food Chem 2016; 221:67-75. [PMID: 27979257 DOI: 10.1016/j.foodchem.2016.10.003] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2016] [Revised: 09/02/2016] [Accepted: 10/03/2016] [Indexed: 10/20/2022]
Abstract
An extracellular xylanase from Aureobasidium pullulans NRRL Y-2311-1 produced on wheat bran was purified by a single-step chromatographic procedure. The enzyme had a molecular weight of 21.6kDa. The optimum pH and temperature for xylanase activity were 4.0 and 30-50°C, respectively. The enzyme was stable in the pH range of 3.0-8.0. The inactivation energy of the enzyme was calculated as 218kJmol-1. The xylanase was ethanol tolerant and kept complete activity in the presence of 10% ethanol. Likewise, it retained almost complete activity at a concentration range of 0-20% NaCl. In general, the enzyme was resistant to several metal ions and reagents. Mg2+, Zn2+, Cu2+, K1+, EDTA and β-mercaptoethanol resulted in enhanced xylanase activity. The Km and Vmax values on beechwood xylan were determined to be 19.43mgml-1 and 848.4Uml-1, respectively. The enzyme exhibits excellent characteristics and could, therefore, be a promising candidate for application in food and bio-industries.
Collapse
Affiliation(s)
- Sirma Yegin
- Department of Food Engineering, Ege University, 35100 Bornova, Izmir, Turkey.
| |
Collapse
|