1
|
Marciano CL, de Almeida AP, Bezerra FC, Giannesi GC, Cabral H, Teixeira de Moraes Polizeli MDL, Ruller R, Masui DC. Enhanced saccharification levels of corn starch using as a strategy a novel amylolytic complex (AmyHb) from the thermophilic fungus Humicola brevis var. thermoidea in association with commercial enzyme. 3 Biotech 2024; 14:198. [PMID: 39131173 PMCID: PMC11310185 DOI: 10.1007/s13205-024-04038-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2024] [Accepted: 07/30/2024] [Indexed: 08/13/2024] Open
Abstract
Amylases represent a versatile group of catalysts that are used for the saccharification of starch because they can hydrolyze the glycosidic bonds of starch molecules to release glucose, maltose, and short-chain oligosaccharides. The amylolytic complex of the thermophilic filamentous fungus Humicola brevis var. thermoidea (AmyHb) was produced, biochemically characterized, and compared with the commercial amylase Termamyl. In addition, the biotechnological application of AmyHb in starch saccharification was investigated. The highest production was achieved using a wheat bran medium at 50 °C for 5-6 days in solid-state fermentation (849.6 ± 18.2 U·g-1) without the addition of inducers. Optimum amylolytic activity occurred at pH 5.0 at 60 °C, and stability was maintained between pH 5.0 and 6.0, with thermal stability at 50-60 °C, especially in the presence of Ca2+. These results were superior to those found with Termamyl. Both enzymes were strongly inhibited by Hg2+, Cu2+, and Ag+; however, AmyHb displayed increased activity in the presence of Mn2+ and Na+. In addition, AmyHb showed greater tolerance to a wide range of ethanol concentrations. AmyHb appears to be a complex consisting of glucoamylase and α-amylase, based on its substrate specificity and TLC. The hydrolysis tests on cornstarch flour showed that the cocktail of AmyHb50% + Termamyl50% significantly increased the release of glucose and total reducing sugars (36.6%) when compared to the enzymes alone. AmyHb exhibited promising physicochemical properties and good performance with commercial amylase; therefore, this complex is a biotechnological alternative candidate for the bioprocessing of starch sources.
Collapse
Affiliation(s)
- Camila Langer Marciano
- Laboratório de Bioquímica Geral E de Microrganismos-LBQ, Instituto de Biociências-INBIO, Universidade Federal de Mato Grosso Do Sul-UFMS, Campo Grande, MS CEP: 79070-900 Brazil
- Faculdade de Ciências Farmacêuticas de Ribeirão Preto, FCFRP – Universidade de São Paulo, Ribeirão Preto, SP CEP: 14040-903 Brazil
| | - Aline Pereira de Almeida
- Faculdade de Medicina de Ribeirão Preto, FMRP – Universidade de São Paulo, Ribeirão Preto, SP CEP: 14049-900 Brazil
- Departamento de Biologia, Faculdade de Filosofia, Ciências E Letras de Ribeirão Preto - FFCLRP, Universidade de São Paulo-USP, Ribeirão Preto, SP CEP: 14040-901 Brazil
| | - Fabiane Cruz Bezerra
- Laboratório de Bioquímica Geral E de Microrganismos-LBQ, Instituto de Biociências-INBIO, Universidade Federal de Mato Grosso Do Sul-UFMS, Campo Grande, MS CEP: 79070-900 Brazil
| | - Giovana Cristina Giannesi
- Laboratório de Bioquímica Geral E de Microrganismos-LBQ, Instituto de Biociências-INBIO, Universidade Federal de Mato Grosso Do Sul-UFMS, Campo Grande, MS CEP: 79070-900 Brazil
| | - Hamilton Cabral
- Faculdade de Ciências Farmacêuticas de Ribeirão Preto, FCFRP – Universidade de São Paulo, Ribeirão Preto, SP CEP: 14040-903 Brazil
| | | | - Roberto Ruller
- Departamento de Biologia, Faculdade de Filosofia, Ciências E Letras de Ribeirão Preto - FFCLRP, Universidade de São Paulo-USP, Ribeirão Preto, SP CEP: 14040-901 Brazil
- Universidade Estadual Paulista - UNESP, Instituto de Biociências, Letras e Ciências Exatas - IBILCE, São José do Rio Preto, SP CEP: 15054-000 Brazil
- Centro de Ciências Naturais e Humanas - CCNH, Universidade Federal do ABC - UFABC, Santo André, SP CEP: 09210-170 Brazil
| | - Douglas Chodi Masui
- Laboratório de Bioquímica Geral E de Microrganismos-LBQ, Instituto de Biociências-INBIO, Universidade Federal de Mato Grosso Do Sul-UFMS, Campo Grande, MS CEP: 79070-900 Brazil
| |
Collapse
|
2
|
Zaghetto de Almeida P, Alnoch RC, Pinheiro VE, Pereira Gimenez M, de Lourdes Teixeira de Moraes Polizeli M. Biochemical Characterization of a Novel Thermostable 1,4-α-Glucoamylase from Aspergillus brasiliensis Strain Isolated in the Brazilian Atlantic Forest. Appl Biochem Biotechnol 2024:10.1007/s12010-024-04903-9. [PMID: 38512551 DOI: 10.1007/s12010-024-04903-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/04/2024] [Indexed: 03/23/2024]
Abstract
Glucoamylases are exo-enzymes that cleave the ends of the starch chain, releasing glucose units. In the current work, we described a novel 1,4-α-glucoamylase from an A. brasiliensis strain isolated from an environmental sample. The purified glucoamylase, GlaAb, has a molecular mass of 69 kDa and showed a starch binding domain. GlaAb showed a similar sequence to other fungal glucoamylases, and the molecular 3D model analysis of GlaAb suggests an overall structure as described in the literature, except by elongation in the loop connecting the 4th and 5th α-helices. The enzyme showed activity over a wide range of pH and temperature, with maximum activity at pH 4.5 and 60 °C. GlaAb was stable at 50 °C for 7 h, maintaining 67% residual activity, and it was not inhibited by glucose up to 0.1 M. The glucoamylase was 65% more active in the presence of Mn2+ and showed a Km of 2.21 mg mL-1, Vmax of 155 U mg-1, Kcat 179 s-1, and Kcat/Km 81.06 mg mL-1 s-1 using potato starch as substrate. The results obtained are promising and provide the basis for the development of applications of GlaAb in the industrial process.
Collapse
Affiliation(s)
- Paula Zaghetto de Almeida
- Departamento de Bioquímica e Imunologia, Faculdade de Medicina de Ribeirão Preto-Universidade de São Paulo, Av. Bandeirantes, 3.900, Ribeirão Preto, São Paulo, 14049-900, Brazil
| | - Robson Carlos Alnoch
- Departamento de Bioquímica e Imunologia, Faculdade de Medicina de Ribeirão Preto-Universidade de São Paulo, Av. Bandeirantes, 3.900, Ribeirão Preto, São Paulo, 14049-900, Brazil
- Departamento de Biologia, Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto-Universidade de São Paulo, Av. Bandeirantes, 3.900, Ribeirão Preto, São Paulo, 14040-901, Brazil
| | - Vanessa Elisa Pinheiro
- Departamento de Bioquímica e Imunologia, Faculdade de Medicina de Ribeirão Preto-Universidade de São Paulo, Av. Bandeirantes, 3.900, Ribeirão Preto, São Paulo, 14049-900, Brazil
| | - Marita Pereira Gimenez
- Departamento de Bioquímica e Imunologia, Faculdade de Medicina de Ribeirão Preto-Universidade de São Paulo, Av. Bandeirantes, 3.900, Ribeirão Preto, São Paulo, 14049-900, Brazil
- Faculdade de Ciências Farmacêuticas, de Ribeirão Preto-Universidade de São Paulo, Av. Do Café S/N, Ribeirão Preto, São Paulo, 14040-903, Brazil
| | - Maria de Lourdes Teixeira de Moraes Polizeli
- Departamento de Bioquímica e Imunologia, Faculdade de Medicina de Ribeirão Preto-Universidade de São Paulo, Av. Bandeirantes, 3.900, Ribeirão Preto, São Paulo, 14049-900, Brazil.
- Departamento de Biologia, Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto-Universidade de São Paulo, Av. Bandeirantes, 3.900, Ribeirão Preto, São Paulo, 14040-901, Brazil.
| |
Collapse
|
3
|
Das S, T C, Selvasembian R, Prabhu AA. Mixed food waste valorization using a thermostable glucoamylase enzyme produced by a newly isolated filamentous fungus: A sustainable biorefinery approach. CHEMOSPHERE 2024; 352:141480. [PMID: 38401866 DOI: 10.1016/j.chemosphere.2024.141480] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/06/2023] [Revised: 01/26/2024] [Accepted: 02/15/2024] [Indexed: 02/26/2024]
Abstract
Food waste is a lucrative source of complex nutrients, which can be transformed into a multitude of bioproducts by the aid of microbial cell factories. The current study emphasizes isolating Glucoamylase enzyme (GA) producing strains that can effectively break down mixed food waste (MW), which serves as a substrate for biomanufacturing. The screening procedure relied heavily on the growth of isolated fungi on starch agar media, to specifically identify the microbes with the highest starch hydrolysis potential. A strain displayed the highest GA activity of 2.9 ± 0.14 U/ml which was selected and identified as Aspergillus fumigatus via molecular methods of identification. Exposure of the A. fumigatus with 200 mM Ethyl methanesulphonate (EMS) led to a 23.79% increase compared to the wild-type GA. The growth conditions like cultivation temperature or the number of spores in the inoculum were investigated. Further, maximum GA activity was exhibited at pH 5, 55 °C, and at 5 mM Ca2+ concentration. The GA showed thermostability, retaining activity even after long periods of exposure to temperatures as high as 95 °C. The improvement of hydrolysis of MW was achieved by Taguchi design where a maximum yield of 0.57 g g-1 glucose was obtained in the hydrolysate. This study puts forth the possibility that mixed food waste, despite containing spices and other microbial growth-inhibitory substances, can be efficiently hydrolyzed to release glucose units, by robust fungal cell factories. The glucose released can then be utilized as a carbon source for the production of value-added products.
Collapse
Affiliation(s)
- Satwika Das
- Bioprocess Development Laboratory, Department of Biotechnology, National Institute of Technology, Warangal, Telangana, 506004, India
| | - Chandukishore T
- Bioprocess Development Laboratory, Department of Biotechnology, National Institute of Technology, Warangal, Telangana, 506004, India
| | - Rangabhashiyam Selvasembian
- Department of Environmental Science and Engineering, School of Engineering and Sciences, SRM University-AP, Amaravati, Andhra Pradesh, 522240, India
| | - Ashish A Prabhu
- Bioprocess Development Laboratory, Department of Biotechnology, National Institute of Technology, Warangal, Telangana, 506004, India.
| |
Collapse
|
4
|
Mendonça APS, Dos Reis KL, Barbosa-Tessmann IP. Aspergillus clavatus UEM 04: An efficient producer of glucoamylase and α-amylase able to hydrolyze gelatinized and raw starch. Int J Biol Macromol 2023; 249:125890. [PMID: 37479205 DOI: 10.1016/j.ijbiomac.2023.125890] [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: 02/25/2023] [Revised: 06/04/2023] [Accepted: 07/17/2023] [Indexed: 07/23/2023]
Abstract
The best amylolytic activity production by Aspergillus clavatus UEM 04 occurred in submersed culture, with starch, for 72 h, at 25 °C, and 100 rpm. Exclusion chromatography partially purified two enzymes, which ran as unique bands in SDS-PAGE with approximately 84 kDa. LC-MS/MS identified a glucoamylase (GH15) and an α-amylase (GH13_1) as the predominant proteins and other co-purified proteins. Zn2+, Cu2+, and Mn2+ activated the glucoamylase, and SDS, Zn2+, Fe3+, and Cu2+ inhibited the α-amylase. The α-amylase optimum pH was 6.5. The optimal temperatures for the glucoamylase and α-amylase were 50 °C and 40 °C, and the Tm was 53.1 °C and 56.3 °C, respectively. Both enzymes remained almost fully active for 28-32 h at 40 °C, but the α-amylase thermal stability was calcium-dependent. Furthermore, the glucoamylase and α-amylase KM for starch were 2.95 and 1.0 mg/mL, respectively. Still, the Vmax was 0.28 μmol/min of released glucose for glucoamylase and 0.1 mg/min of consumed starch for α-amylase. Moreover, the glucoamylase showed greater affinity for amylopectin and α-amylase for maltodextrin. Additionally, both enzymes efficiently degraded raw starch. At last, glucose was the main product of glucoamylase, and α-amylase produced mainly maltose from gelatinized soluble starch hydrolysis.
Collapse
Affiliation(s)
- Ana Paula Silva Mendonça
- Biological Sciences Center, Department of Biochemistry, Universidade Estadual de Maringá, Maringá, PR, Brazil
| | - Karina Lima Dos Reis
- Biological Sciences Center, Department of Biochemistry, Universidade Estadual de Maringá, Maringá, PR, Brazil
| | - Ione Parra Barbosa-Tessmann
- Biological Sciences Center, Department of Biochemistry, Universidade Estadual de Maringá, Maringá, PR, Brazil.
| |
Collapse
|
5
|
Wayllace NM, Hedín N, Busi MV, Gomez-Casati DF. Identification, molecular and biochemical characterization of a novel thermoactive and thermostable glucoamylase from Thermoanaerobacter ethanolicus. Biotechnol Lett 2022; 44:1201-1216. [PMID: 35997915 DOI: 10.1007/s10529-022-03296-1] [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: 05/14/2022] [Accepted: 08/15/2022] [Indexed: 11/27/2022]
Abstract
PURPOSE We identified a new glucoamylase (TeGA) from Thermoanaerobacter ethanolicus, a thermophilic anaerobic bacterium. Structural studies suggest that TeGA belongs to the family 15 of glycosylhydrolases (GH15). METHODS The expression of this enzyme was optimized in E. coli (BL21) cells in order to have the highest amount of soluble protein (around 3 mg/l of culture medium). RESULTS TeGA showed a high optimum temperature of 75 °C. It also showed one of the highest specific activities reported for a bacterial glucoamylase (75.3 U/mg) and was also stable in a wide pH range (3.0-10.0). Although the enzyme was preferentially active with maltose, it was also able to hydrolyze different soluble starches such as those from potato, corn or rice. TeGA showed a high thermostability up to around 70 °C, which was increased in the presence of PEG8000, and also showed to be stable in the presence of moderate concentrations of ethanol. CONCLUSION We propose that TeGA could be suitable for use in different industrial processes such as biofuel production and food processing.
Collapse
Affiliation(s)
- Natael M Wayllace
- Centro de Estudios Fotosintéticos y Bioquímicos (CEFOBI), CONICET-Universidad Nacional de Rosario, Suipacha 531, 2000, Rosario, Argentina
| | - Nicolas Hedín
- Centro de Estudios Fotosintéticos y Bioquímicos (CEFOBI), CONICET-Universidad Nacional de Rosario, Suipacha 531, 2000, Rosario, Argentina
| | - María V Busi
- Centro de Estudios Fotosintéticos y Bioquímicos (CEFOBI), CONICET-Universidad Nacional de Rosario, Suipacha 531, 2000, Rosario, Argentina.
| | - Diego F Gomez-Casati
- Centro de Estudios Fotosintéticos y Bioquímicos (CEFOBI), CONICET-Universidad Nacional de Rosario, Suipacha 531, 2000, Rosario, Argentina.
| |
Collapse
|
6
|
Wang C, Yang L, Luo L, Tang S, Wang Q. Purification and characterization of glucoamylase of Aspergillus oryzae from Luzhou-flavour Daqu. Biotechnol Lett 2020; 42:2345-2355. [PMID: 32623532 DOI: 10.1007/s10529-020-02956-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2020] [Accepted: 06/30/2020] [Indexed: 10/23/2022]
Abstract
OBJECTIVE To obtain novel glucoamylase from Daqu microbe. RESULTS A dominant strain known as LZ2 with high activity of hydrolyzing starch was isolated from Luzhou Daqu, a Chinese traditional fermentation starter. The LZ2 was identified as Aspergillus oryzae by 18S rDNA sequence analysis. Glucoamylase from LZ2, named as GA-LZ2, was purified to homogeneity and showed a single band with expected molecular mass of 60 kD. The GA-LZ2 effectively degraded amylose, rice starch and wheat starch. Optimal temperature and pH value of enzyme were 60 °C and pH 4.0 respectively. The GA-LZ2 displayed significant thermal stability and pH stability at moderate temperature and low pH. Intriguingly, the thermostability was enhanced in the presence of starch. In addition, GA-LZ2 exhibited insensitivity to glucose, independence of metal ions and tolerance to organic solvents. The GA-LZ2 retained complete activity in the presence of 100 mM glucose and 5% ethanol and methanol. CONCLUSION Glucoamylase GA-LZ2 displayed broad substrate specificity, strong stability and tolerance, suggesting that GA-LZ2 carry potential for industrial application in bioethanol production.
Collapse
Affiliation(s)
- Chuan Wang
- College of Bioengineering, Sichuan University of Science & Engineering, No. 180, Xueyuan Street, Huixing Road, Zigong, 643000, Sichuan, People's Republic of China.
| | - Lianli Yang
- College of Bioengineering, Sichuan University of Science & Engineering, No. 180, Xueyuan Street, Huixing Road, Zigong, 643000, Sichuan, People's Republic of China
| | - Lunan Luo
- College of Bioengineering, Sichuan University of Science & Engineering, No. 180, Xueyuan Street, Huixing Road, Zigong, 643000, Sichuan, People's Republic of China
| | - Shichao Tang
- College of Bioengineering, Sichuan University of Science & Engineering, No. 180, Xueyuan Street, Huixing Road, Zigong, 643000, Sichuan, People's Republic of China
| | - Qiang Wang
- College of Bioengineering, Sichuan University of Science & Engineering, No. 180, Xueyuan Street, Huixing Road, Zigong, 643000, Sichuan, People's Republic of China
| |
Collapse
|
7
|
Ghani M, Ansari A, Haider MS, Asif T, Ibrahim F, Qader SAU, Aman A. Purification and Characterization of a Thermostable Starch‐Saccharifying Alpha‐1,4‐Glucan‐Glucohydrolase Produced byBacillus licheniformis. STARCH-STARKE 2019. [DOI: 10.1002/star.201800352] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Maria Ghani
- The Karachi Institute of Biotechnology and Genetic Engineering (KIBGE)University of Karachi Karachi 75270 Pakistan
| | - Asma Ansari
- The Karachi Institute of Biotechnology and Genetic Engineering (KIBGE)University of Karachi Karachi 75270 Pakistan
| | - Muhammad Samee Haider
- Food and Marine Resource Research Centre, Pakistan Council of Scientific and Industrial Research (PCSIR) Laboratories Complex Karachi 75280 Pakistan
| | - Tayyaba Asif
- The Karachi Institute of Biotechnology and Genetic Engineering (KIBGE)University of Karachi Karachi 75270 Pakistan
| | - Fariha Ibrahim
- The Karachi Institute of Biotechnology and Genetic Engineering (KIBGE)University of Karachi Karachi 75270 Pakistan
| | - Shah Ali Ul Qader
- Department of BiochemistryUniversity of Karachi Karachi 75270 Pakistan
| | - Afsheen Aman
- The Karachi Institute of Biotechnology and Genetic Engineering (KIBGE)University of Karachi Karachi 75270 Pakistan
| |
Collapse
|
8
|
Pervez S, Nawaz MA, Shahid F, Aman A, Tauseef I, Qader SAU. Characterization of cross-linked amyloglucosidase aggregates from Aspergillus fumigatus KIBGE-IB33 for continuous production of glucose. Int J Biol Macromol 2019; 135:1252-1260. [DOI: 10.1016/j.ijbiomac.2018.11.097] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2017] [Revised: 04/24/2018] [Accepted: 11/12/2018] [Indexed: 10/27/2022]
|
9
|
Karim KMR, Husaini A, Sing NN, Tasnim T, Mohd Sinang F, Hussain H, Hossain MA, Roslan H. Characterization and expression in Pichia pastoris of a raw starch degrading glucoamylase (GA2) derived from Aspergillus flavus NSH9. Protein Expr Purif 2019; 164:105462. [PMID: 31351992 DOI: 10.1016/j.pep.2019.105462] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2019] [Revised: 06/19/2019] [Accepted: 07/24/2019] [Indexed: 11/25/2022]
Abstract
The Aspergillus flavus NSH9 gene, encoding a pH and thermostable glucoamylase with a starch binding domain (SBD), was expressed in Pichia pastoris to produce recombinant glucoamylase (rGA2). The full-length glucoamylase gene (2039 bp), and cDNA (1839 bp) encode a 612 amino acid protein most similar to glucoamylase from Aspergillus oryzae RIB40; the first 19 amino acids are presumed to be a signal peptide for secretion, and the SBD is at the C-terminal. The cDNA was successfully secreted by Pichia at 8.23 U mL-1, and the rGA2 was found to be: a 80 kDa monomer, stable from pH 3.0-9.0, with optimum catalytic activity at pH 5.0, active at temperatures up to 80°C (rGA2 retained 58% of its activity after 60 min of incubation at 70°C), and metal ions such as Na+, K+, Ca++ and Mg++ enhanced rGA2 enzyme activity. The starch degrading ability of rGA2 was also observed on raw sago starch and where prolonged incubation generated larger, deeper, holes on the starch granules, indicating rGA2 is an excellent candidate for industrial starch processing applications.
Collapse
Affiliation(s)
| | - Ahmad Husaini
- Faculty of Resource Science and Technology, Universiti Malaysia Sarawak, 94300, Kota, Samarahan, Sarawak, Malaysia.
| | - Ngieng Ngui Sing
- Faculty of Resource Science and Technology, Universiti Malaysia Sarawak, 94300, Kota, Samarahan, Sarawak, Malaysia
| | - Tasmia Tasnim
- Department of Nutrition and Food Engineering, Daffodil International University, Dhaka, 1207, Bangladesh
| | - Fazia Mohd Sinang
- Faculty of Resource Science and Technology, Universiti Malaysia Sarawak, 94300, Kota, Samarahan, Sarawak, Malaysia
| | - Hasnain Hussain
- Faculty of Resource Science and Technology, Universiti Malaysia Sarawak, 94300, Kota, Samarahan, Sarawak, Malaysia
| | - Md Anowar Hossain
- Department of Biochemistry and Molecular Biology, University of Rajshahi, Rajshahi, 6205, Bangladesh
| | - Hairul Roslan
- Faculty of Resource Science and Technology, Universiti Malaysia Sarawak, 94300, Kota, Samarahan, Sarawak, Malaysia
| |
Collapse
|
10
|
Preparation of a Flower-Like Immobilized D-Psicose 3-Epimerase with Enhanced Catalytic Performance. Catalysts 2018. [DOI: 10.3390/catal8100468] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
In this present study, we proposed a smart biomineralization method for creating hybrid organic–inorganic nanoflowers using a Co2+-dependent enzyme (D-psicose 3-epimerase; DPEase) as the organic component and cobalt phosphate as the inorganic component. The prepared nanoflowers have many separated petals that have a nanometer size. Under optimum conditions (60 °C and pH of 8.5), the nanoflower can display its maximum activity (36.2 U/mg), which is about 7.2-fold higher than free DPEase. Furthermore, the immobilized DPEase presents enhanced pH and thermal stabilities. The DPEase-nanoflower maintained about 90% of its activity after six reaction cycles, highlighting its excellent reusability.
Collapse
|
11
|
Bayraktaroğlu M, Orhan H, Evli S, Akgöl S, Aktaş Uygun D, Uygun M. Lectin attached affinity cryogels for amyloglucosidase adsorption. J Carbohydr Chem 2018. [DOI: 10.1080/07328303.2018.1487972] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Affiliation(s)
- Melis Bayraktaroğlu
- Faculty of Science and Arts, Chemistry Division, Adnan Menderes University, Aydın, Turkey
| | - Hande Orhan
- Faculty of Science and Arts, Chemistry Division, Adnan Menderes University, Aydın, Turkey
| | - Sinem Evli
- Faculty of Science and Arts, Chemistry Division, Adnan Menderes University, Aydın, Turkey
| | - Sinan Akgöl
- Faculty of Science, Biochemistry Division, Ege University, İzmir, Turkey
| | - Deniz Aktaş Uygun
- Faculty of Science and Arts, Chemistry Division, Adnan Menderes University, Aydın, Turkey
- Nanotechnology Application and Research Center, Adnan Menderes University, Aydın, Turkey
| | - Murat Uygun
- Faculty of Science and Arts, Chemistry Division, Adnan Menderes University, Aydın, Turkey
- Nanotechnology Application and Research Center, Adnan Menderes University, Aydın, Turkey
| |
Collapse
|
12
|
Pasin TM, Benassi VM, Heinen PR, Damasio ARDL, Cereia M, Jorge JA, Polizeli MDLTDM. Purification and functional properties of a novel glucoamylase activated by manganese and lead produced by Aspergillus japonicus. Int J Biol Macromol 2017; 102:779-788. [DOI: 10.1016/j.ijbiomac.2017.04.016] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2017] [Revised: 03/31/2017] [Accepted: 04/04/2017] [Indexed: 12/20/2022]
|
13
|
Maiti S, Sahoo S, Roy S. Production and Partial Purification of Hyperthermostable Alkaline Amylase in a Newly Isolated Bacillus cereus (sm-sr14) from Hot-spring Water. ACTA ACUST UNITED AC 2017. [DOI: 10.3923/jm.2017.187.201] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
|
14
|
Sethi BK, Jana A, Nanda PK, DasMohapatra PK, Sahoo SL, Patra JK. Production of α-Amylase by Aspergillus terreus NCFT 4269.10 Using Pearl Millet and Its Structural Characterization. FRONTIERS IN PLANT SCIENCE 2016; 7:639. [PMID: 27242841 PMCID: PMC4870861 DOI: 10.3389/fpls.2016.00639] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/11/2016] [Accepted: 04/25/2016] [Indexed: 05/28/2023]
Abstract
In this investigation, Aspergillus terreus NCFT4269.10 was employed in liquid static surface (LSSF) and solid state (SSF) fermentation to assess the optimal conditions for α-amylase biosynthesis. One-variable-at-a-time approach (quasi-optimum protocol) was primarily used to investigate the effect of each parameter on production of amylase. The maximum amylase production was achieved using pearl millet (PM) as substrate by SSF (19.19 ± 0.9 Ug(-1)) and also in presence of 1 mM magnesium sulfate, 0.025% (w/v) gibberellic acid, and 30 mg/100 ml (w/v) of vitamin E (~60-fold higher production of amylase) with the initial medium pH of 7.0 and incubation at 30 °C for 96 h. In addition, maltose, gelatin and isoleucine also influenced the α-amylase production. Amylase was purified to homogeneity with molecular mass around 15.3 kDa. The enzyme comprised of a typical secondary structure containing α-helix (12.2%), β-pleated sheet (23.6%), and β-turn (27.4%). Exploitation of PM for α-amylase production with better downstream makes it the unique enzyme for various biotechnological applications.
Collapse
Affiliation(s)
- Bijay K. Sethi
- Microbiology Research Laboratory, Post Graduate Department of Botany, Utkal UniversityBhubaneswar, India
| | - Arijit Jana
- Department of Microbiology, Vidyasagar UniversityMidnapore, India
| | | | | | - Santi L. Sahoo
- Microbiology Research Laboratory, Post Graduate Department of Botany, Utkal UniversityBhubaneswar, India
| | - Jayanta Kumar Patra
- Research Institute of Biotechnology & Medical Converged Science, Dongguk UniversityGoyang, South Korea
| |
Collapse
|
15
|
Enzyme stability, thermodynamics and secondary structures of α-amylase as probed by the CD spectroscopy. Int J Biol Macromol 2015; 81:450-60. [PMID: 26297306 DOI: 10.1016/j.ijbiomac.2015.08.032] [Citation(s) in RCA: 49] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2014] [Revised: 08/13/2015] [Accepted: 08/14/2015] [Indexed: 01/11/2023]
Abstract
An amylase of a thermophilic bacterium, Bacillus sp. TSSC-3 (GenBank Number, EU710557) isolated from the Tulsi Shyam hot spring reservoir (Gujarat, India) was purified to the homogeneity in a single step on phenyl sepharose 6FF. The molecular weight of the enzyme was 25kD, while the temperature and pH optima for the enzyme catalysis were 80°C and 7, respectively. The purified enzyme was highly thermostable with broad pH stability and displayed remarkable resistance against surfactants, chelators, urea, guanidine HCl and various solvents as well. The stability and changes in the secondary structure of the enzyme under various extreme conditions were determined by the circular dichroism (CD) spectroscopy. The stability trends and the changes in the α-helices and β-sheets were analyzed by Mean Residual Ellipticity (MRE) and K2D3. The CD data confirmed the structural stability of the enzyme under various harsh conditions, yet it indicated reduced α-helix content and increased β-sheets upon denaturation. The thermodynamic parameters; deactivation rate constant, half-life, changes in entropy, enthalpy, activation energy and Gibb's free energy indicated that the enzyme-substrate reactions were highly stable. The overall profile of the enzyme: high thermostability, alkalitolerance, calcium independent nature, dextrose equivalent values and resistance against chemical denaturants, solvents and surfactants suggest its commercial applications.
Collapse
|
16
|
Hua H, Luo H, Bai Y, Wang K, Niu C, Huang H, Shi P, Wang C, Yang P, Yao B. A thermostable glucoamylase from Bispora sp. MEY-1 with stability over a broad pH range and significant starch hydrolysis capacity. PLoS One 2014; 9:e113581. [PMID: 25415468 PMCID: PMC4240638 DOI: 10.1371/journal.pone.0113581] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2014] [Accepted: 10/25/2014] [Indexed: 11/23/2022] Open
Abstract
Background Glucoamylase is an exo-type enzyme that converts starch completely into glucose from the non-reducing ends. To meet the industrial requirements for starch processing, a glucoamylase with excellent thermostability, raw-starch degradation ability and high glucose yield is much needed. In the present study we selected the excellent Carbohydrate-Activity Enzyme (CAZyme) producer, Bispora sp. MEY-1, as the microbial source for glucoamylase gene exploitation. Methodology/Principal Findings A glucoamylase gene (gla15) was cloned from Bispora sp. MEY-1 and successfully expressed in Pichia pastoris with a high yield of 34.1 U/ml. Deduced GLA15 exhibits the highest identity of 64.2% to the glucoamylase from Talaromyces (Rasamsonia) emersonii. Purified recombinant GLA15 was thermophilic and showed the maximum activity at 70°C. The enzyme was stable over a broad pH range (2.2–11.0) and at high temperature up to 70°C. It hydrolyzed the breakages of both α-1,4- and α-1,6-glycosidic linkages in amylopectin, soluble starch, amylose, and maltooligosaccharides, and had capacity to degrade raw starch. TLC and H1-NMR analysis showed that GLA15 is a typical glucoamylase of GH family 15 that releases glucose units from the non-reducing ends of α-glucans. The combination of Bacillus licheniformis amylase and GLA15 hydrolyzed 96.14% of gelatinized maize starch after 6 h incubation, which was about 9% higher than that of the combination with a commercial glucoamylase from Aspergillus niger. Conclusion/Significance GLA15 has a broad pH stability range, high-temperature thermostability, high starch hydrolysis capacity and high expression yield. In comparison with the commercial glucoamylase from A. niger, GLA15 represents a better candidate for application in the food industry including production of glucose, glucose syrups, and high-fructose corn syrups.
Collapse
Affiliation(s)
- Huifang Hua
- Key Laboratory for Feed Biotechnology of the Ministry of Agriculture, Feed Research Institute, Chinese Academy of Agricultural Sciences, Beijing, 100081, P. R. China
| | - Huiying Luo
- Key Laboratory for Feed Biotechnology of the Ministry of Agriculture, Feed Research Institute, Chinese Academy of Agricultural Sciences, Beijing, 100081, P. R. China
| | - Yingguo Bai
- Key Laboratory for Feed Biotechnology of the Ministry of Agriculture, Feed Research Institute, Chinese Academy of Agricultural Sciences, Beijing, 100081, P. R. China
| | - Kun Wang
- Key Laboratory for Feed Biotechnology of the Ministry of Agriculture, Feed Research Institute, Chinese Academy of Agricultural Sciences, Beijing, 100081, P. R. China
| | - Canfang Niu
- Key Laboratory for Feed Biotechnology of the Ministry of Agriculture, Feed Research Institute, Chinese Academy of Agricultural Sciences, Beijing, 100081, P. R. China
| | - Huoqing Huang
- Key Laboratory for Feed Biotechnology of the Ministry of Agriculture, Feed Research Institute, Chinese Academy of Agricultural Sciences, Beijing, 100081, P. R. China
| | - Pengjun Shi
- Key Laboratory for Feed Biotechnology of the Ministry of Agriculture, Feed Research Institute, Chinese Academy of Agricultural Sciences, Beijing, 100081, P. R. China
| | - Caihong Wang
- Key Laboratory for Feed Biotechnology of the Ministry of Agriculture, Feed Research Institute, Chinese Academy of Agricultural Sciences, Beijing, 100081, P. R. China
| | - Peilong Yang
- Key Laboratory for Feed Biotechnology of the Ministry of Agriculture, Feed Research Institute, Chinese Academy of Agricultural Sciences, Beijing, 100081, P. R. China
- CAAS-ICRAF Joint Laboratory on Agroforestry and Sustainable Animal Husbandry, Beijing, 100193, P. R. China
| | - Bin Yao
- Key Laboratory for Feed Biotechnology of the Ministry of Agriculture, Feed Research Institute, Chinese Academy of Agricultural Sciences, Beijing, 100081, P. R. China
- * E-mail:
| |
Collapse
|
17
|
Yu HY, Li X. Characterization of an organic solvent-tolerant thermostable glucoamylase from a halophilic isolate, Halolactibacillus sp. SK71 and its application in raw starch hydrolysis for bioethanol production. Biotechnol Prog 2014; 30:1262-8. [PMID: 25138675 DOI: 10.1002/btpr.1978] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2014] [Revised: 06/14/2014] [Indexed: 11/10/2022]
Abstract
A halophilic bacterium Halolactibacillus sp. SK71 producing extracellular glucoamylase was isolated from saline soil of Yuncheng Salt Lake, China. Enzyme production was strongly influenced by the salinity of growth medium with maximum in the presence of 5% NaCl. The glucoamylase was purified to homogeneity with a molecular mass of 78.5 kDa. It showed broad substrate specificity and raw starch hydrolyzing activity. Analysis of hydrolysis products from soluble starch by thin-layer chromatography revealed that glucose was the sole end-product, indicating the enzyme was a true glucoamylase. Optimal enzyme activity was found to be at 70°C, pH 8.0, and 7.5% NaCl. In addition, it was highly active and stable over broad ranges of temperature (0-100°C), pH (7.0-12.0), and NaCl concentration (0-20%), showing excellent thermostable, alkali stable, and halotolerant properties. Furthermore, it displayed high stability in the presence of hydrophobic organic solvents. The purified glucoamylase was applied for raw corn starch hydrolysis and subsequent bioethanol production using Saccharomyces cerevisiae. The yield in terms of grams of ethanol produced per gram of sugar consumed was 0.365 g/g, with 71.6% of theoretical yield from raw corn starch. This study demonstrated the feasibility of using enzymes from halophiles for further application in bioenergy production.
Collapse
Affiliation(s)
- Hui-Ying Yu
- Life Science College, Yuncheng University, 1155 Fudan West Street, Yuncheng, 044000, Shanxi, China
| | | |
Collapse
|
18
|
Liu Y, Li QS, Zhu HL, Meng ZL, Xiang HY, Xie QH. Purification and characterization of two thermostable glucoamylases produced from Aspergillus niger B-30. Chem Res Chin Univ 2013. [DOI: 10.1007/s40242-013-3074-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
|
19
|
Glucoamylase from a newly isolated Aspergillus niger FME: Detergent-Mediated production, purification, and characterization. ACTA ACUST UNITED AC 2013. [DOI: 10.1007/s13765-012-3001-9] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
20
|
Maller A, da Silva TM, Damásio ARDL, Hirata IY, Jorge JA, Terenzi HF, Polizeli MDLTDM. Functional properties of a manganese-activated exo-polygalacturonase produced by a thermotolerant fungus Aspergillus niveus. Folia Microbiol (Praha) 2013; 58:615-21. [DOI: 10.1007/s12223-013-0249-3] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2012] [Accepted: 03/24/2013] [Indexed: 11/28/2022]
|
21
|
Riaz M, Rashid MH, Sawyer L, Akhtar S, Javed MR, Nadeem H, Wear M. Physiochemical properties and kinetics of glucoamylase produced from deoxy-d-glucose resistant mutant of Aspergillus niger for soluble starch hydrolysis. Food Chem 2012; 130:S0308-8146(11)00920-4. [PMID: 24293795 DOI: 10.1016/j.foodchem.2011.06.037] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
Glucoamylases (GAs) from a wild and a deoxy-d-glucose-resistant mutant of a locally isolated Aspergillus niger were purified to apparent homogeneity. The subunit molecular mass estimated by SDS-PAGE was 93 kDa for both strains, while the molecular masses determined by MALDI-TOF for wild and mutant GAs were 72.876 and 72.063 kDa, respectively. The monomeric nature of the enzymes was confirmed through activity staining. Significant improvement was observed in the kinetic properties of the mutant GA relative to the wild type enzyme. Kinetic constants of starch hydrolysis for A. niger parent and mutant GAs calculated on the basis of molecular masses determined through MALDI-TOF were as follows: kcat = 343 and 727 s-1, Km = 0.25 and 0.16 mg mL-1, kcat/Km (specificity constant) = 1374 and 4510 mg mL-1 s-1, respectively. Thermodynamic parameters for soluble starch hydrolysis also suggested that mutant GA was more efficient compared to the parent enzyme.
Collapse
Affiliation(s)
- Muhammad Riaz
- Department of Food Science and Technology, University College of Agriculture, Bahauddin Zakariya University, Multan, Pakistan ; Enzyme Engineering Lab, National Institute for Biotechnology and Genetic Engineering (NIBGE), P.O. Box 577, Jhang Road, Faisalabad, Pakistan
| | | | | | | | | | | | | |
Collapse
|
22
|
Maller A, Damásio ARL, da Silva TM, Jorge JA, Terenzi HF, Polizeli MDLTDM. Biotechnological Potential of Agro-Industrial Wastes as a Carbon Source to Thermostable Polygalacturonase Production in Aspergillus niveus. Enzyme Res 2011; 2011:289206. [PMID: 21837272 PMCID: PMC3132474 DOI: 10.4061/2011/289206] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2010] [Revised: 03/15/2011] [Accepted: 04/23/2011] [Indexed: 11/20/2022] Open
Abstract
Agro-industrial wastes are mainly composed of complex polysaccharides that might serve as nutrients for microbial growth and production of enzymes. The aim of this work was to study polygalacturonase (PG) production by Aspergillus niveus cultured on liquid or solid media supplemented with agro-industrial wastes. Submerged fermentation (SbmF) was tested using Czapeck media supplemented with 28 different carbon sources. Among these, orange peel was the best PG inducer. On the other hand, for solid state fermentation (SSF), lemon peel was the best inducer. By comparing SbmF with SSF, both supplemented with lemon peel, it was observed that PG levels were 4.4-fold higher under SSF. Maximum PG activity was observed at 55°C and pH 4.0. The enzyme was stable at 60°C for 90 min and at pH 3.0–5.0. The properties of this enzyme, produced on inexpensive fermentation substrates, were interesting and suggested several biotechnological applications.
Collapse
Affiliation(s)
- Alexandre Maller
- Biochemistry and Immunology Department, Ribeirão Preto School of Medicine, São Paulo University, Avenue Bandeirantes, 3900, 14049-900 Ribeirão Preto, SP, Brazil
| | | | | | | | | | | |
Collapse
|