1
|
Djelid H, Flahaut S, Oudjama Y, Wauven CV, Kacem Chaouche N. High NaCl concentrations induce the resistance to thermal denaturation of an extremely halotolerant (salt-activated) β-mannanase from Bacillus velezensis H1. World J Microbiol Biotechnol 2023; 39:304. [PMID: 37691038 DOI: 10.1007/s11274-023-03754-6] [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: 07/20/2023] [Accepted: 09/06/2023] [Indexed: 09/12/2023]
Abstract
β-mannanase catalyzes the hydrolysis of mannans β-1,4-mannosidic linkages to produce industrially relevant oligosaccharides. These enzymes have numerous important applications in the detergent, food, and feed industries, particularly those that are resistant to harsh environmental conditions such as salts and heat. While, moderately salt-tolerant β-mannanases are already reported, existence of a high halotolerant β-mannanase is still elusive. This study aims to report the first purification and characterization of ManH1, an extremely halotolerant β-mannanase from the halotolerant B. velezensis strain H1. Electrospray ionization quadrupole time-of-flight mass spectrometry (ESI-Q-TOF-MS) analysis revealed a single major peak with a molecular mass of 37.8 kDa demonstrating its purity. The purified enzyme showed a good thermostability as no activity was lost after a 48 h incubation under optimal conditions of 50 °C and pH 5.5. The enzyme's salt activation nature was revealed when its maximum activity was obtained in the presence of 4 M NaCl, it doubled compared to the no-salt condition. Moreover, NaCl strengthens its resistance to thermal denaturation, as its melting temperature (Tm) increased steadily with increasing NaCl concentrations reaching 75.5 °C in the presence of 2.5 M NaCl. The Km and Vmax values were 5.63 mg/mL and 333.33 µmol/min/mL, respectively, using carob galactomannan (CG) as a substrate. The enzyme showed a significant ability to produce manno-oligosaccharides (MOS) from lignocellulosic biomass releasing 13 mg/mL of reducing sugars from olive mill wastes (OMW) after 24 h incubation. The results revealed that this enzyme may have significant commercial values for agro-waste treatment, and other potential applications.
Collapse
Affiliation(s)
- Hadjer Djelid
- Laboratoire de Mycologie, de Biotechnologie et de l'Activité Microbienne (LaMyBAM), Département de Biologie Appliquée, FSNV, Université des Frères Mentouri, Constantine 1, Constantine, 25017, Algeria.
- Laboratoire de microbiologie appliquée, Ecole interfacultaire de Bioingénieurs, Université Libre de Bruxelles, Campus du CERIA, Bât. 4B, 1 avenue Emile Gryson, Brussels, 1070, Belgium.
| | - Sigrid Flahaut
- Laboratoire de microbiologie appliquée, Ecole interfacultaire de Bioingénieurs, Université Libre de Bruxelles, Campus du CERIA, Bât. 4B, 1 avenue Emile Gryson, Brussels, 1070, Belgium
| | | | | | - Noreddine Kacem Chaouche
- Laboratoire de Mycologie, de Biotechnologie et de l'Activité Microbienne (LaMyBAM), Département de Biologie Appliquée, FSNV, Université des Frères Mentouri, Constantine 1, Constantine, 25017, Algeria
| |
Collapse
|
2
|
Hyperproduction of a bacterial mannanase and its application for production of bioactive mannooligosaccharides from agro-waste. Process Biochem 2022. [DOI: 10.1016/j.procbio.2022.10.035] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
|
3
|
Cong H, Ma Z, Hu M, Han J, Wang X, Han Y, Li Y, Sun G. Surface Gelatin-Coated β-Mannanase-Immobilized Lignin for Delayed Release of β-Mannanase to Remediate Guar-Based Fracturing Fluid Damage. ACS OMEGA 2022; 7:11722-11730. [PMID: 35449942 PMCID: PMC9017098 DOI: 10.1021/acsomega.1c06817] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/02/2021] [Accepted: 03/17/2022] [Indexed: 06/14/2023]
Abstract
Herein, we developed an efficient and convenient method to address the problem of thickener decomposition in the low- permeability oilfield production process. It is crucial to design breakers that reduce viscosity by delaying thickener decomposition in appropriate environments. By using lignin in biomass as a substrate for β-mannanase immobilization (MIL), we fabricated a gel breaker, surface gelatin-coated β-mannanase-immobilized lignin (Ge@MIL). Through experiments and performance tests, we confirmed that the prepared Ge@MIL can release enzymes at a specific temperature, meanwhile having temperature-sensitive phase change properties and biodegradability. The results also show the tight tuning over the surface coating of Ge@MIL by a water-in-oil emulsion. Therefore, the prepared Ge@MIL has a promising application in the field of oil extraction as a green and efficient temperature-sensitive sustained-release capsule.
Collapse
Affiliation(s)
- Haonan Cong
- Liaoning
Key Lab of Lignocellulose Chemistry and BioMaterials, Liaoning Collaborative
Innovation Center for Lignocellulosic Biorefinery, College of Light
Industry and Chemical Engineering, Dalian
Polytechnic University, Dalian 116034, China
| | - Zihao Ma
- Liaoning
Key Lab of Lignocellulose Chemistry and BioMaterials, Liaoning Collaborative
Innovation Center for Lignocellulosic Biorefinery, College of Light
Industry and Chemical Engineering, Dalian
Polytechnic University, Dalian 116034, China
| | - Meixi Hu
- Liaoning
Key Lab of Lignocellulose Chemistry and BioMaterials, Liaoning Collaborative
Innovation Center for Lignocellulosic Biorefinery, College of Light
Industry and Chemical Engineering, Dalian
Polytechnic University, Dalian 116034, China
| | - Junjie Han
- Department
of Research and Development, Dalian Chivy
Biotechnology CO., LTD., Dalian 116034, China
| | - Xing Wang
- Liaoning
Key Lab of Lignocellulose Chemistry and BioMaterials, Liaoning Collaborative
Innovation Center for Lignocellulosic Biorefinery, College of Light
Industry and Chemical Engineering, Dalian
Polytechnic University, Dalian 116034, China
| | - Ying Han
- Liaoning
Key Lab of Lignocellulose Chemistry and BioMaterials, Liaoning Collaborative
Innovation Center for Lignocellulosic Biorefinery, College of Light
Industry and Chemical Engineering, Dalian
Polytechnic University, Dalian 116034, China
| | - Yao Li
- Liaoning
Key Lab of Lignocellulose Chemistry and BioMaterials, Liaoning Collaborative
Innovation Center for Lignocellulosic Biorefinery, College of Light
Industry and Chemical Engineering, Dalian
Polytechnic University, Dalian 116034, China
| | - Guangwei Sun
- Liaoning
Key Lab of Lignocellulose Chemistry and BioMaterials, Liaoning Collaborative
Innovation Center for Lignocellulosic Biorefinery, College of Light
Industry and Chemical Engineering, Dalian
Polytechnic University, Dalian 116034, China
| |
Collapse
|
4
|
Anisha GS. Microbial α-galactosidases: Efficient biocatalysts for bioprocess technology. BIORESOURCE TECHNOLOGY 2022; 344:126293. [PMID: 34752888 DOI: 10.1016/j.biortech.2021.126293] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/20/2021] [Revised: 10/28/2021] [Accepted: 11/01/2021] [Indexed: 06/13/2023]
Abstract
Galactomannans, abundantly present in plant biomass, can be used as renewable fermentation feedstock for biorefineries working for the production of bioethanol and other value-added products. The complete and efficient bioconversion of biomass to fermentable sugars for the generation of biofuels and other value-added products require the concerted action of accessory enzymes like α-galactosidases, which can work in cohesion with other carbohydrases in an enzyme cocktail. In the paper industry, α-galactosidases enhance the bleaching effect of endo-β-1,4-mannanases on softwood kraft pulp. Microbial α-galactosidases also find applications in the treatment of legume foods, recovery of sucrose from sugar beet syrup, improving the rheological properties of galactomannans, and synthesis of α-galactooligosaccharides to be used as functional food ingredients. Owing to their industrial applications, there is a surge in the research focused on α-galactosidases. The current review illustrates the diverse industrial applications of microbial α-galactosidases and their challenges and prospects.
Collapse
Affiliation(s)
- Grace Sathyanesan Anisha
- Post-Graduate and Research Department of Zoology, Government College for Women, Thiruvananthapuram, Kerala, India.
| |
Collapse
|