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Kotwal N, Pathania D, Singh A, Din Sheikh ZU, Kothari R. Enzyme immobilization with nanomaterials for hydrolysis of lignocellulosic biomass: Challenges and future Perspectives. Carbohydr Res 2024; 543:109208. [PMID: 39013334 DOI: 10.1016/j.carres.2024.109208] [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: 05/12/2024] [Revised: 07/09/2024] [Accepted: 07/10/2024] [Indexed: 07/18/2024]
Abstract
Enzyme immobilization has emerged as a prodigious strategy in the enzymatic hydrolysis of lignocellulosic biomass (LCB) promising enhanced efficacy and stability of the enzymes. Further, enzyme immobilization on magnetic nanoparticles (MNPs) facilitates the easy recovery and reuse of biocatalysts. This results in the development of a nanobiocatalytic system, that serves as an eco-friendly and inexpensive LCB deconstruction approach. This review provides an overview of nanomaterials used for immobilization with special emphasis on the nanomaterial-enzyme interactions and strategies of immobilization. After the succinct outline of the immobilization procedures and supporting materials, a comprehensive assessment of the catalysis enabled by nanomaterial-immobilized biocatalysts for the conversion and degradation of lignocellulosic biomasses is provided by gathering state-of-the-art examples. The challenges and future directions associated with this technique providing a potential solution in the present article. Insight on the recent advancements in the process of nanomaterial-based immobilization for the hydrolysis of lignocellulosic biomass has also been highlighted in the article.
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Affiliation(s)
- Neha Kotwal
- Department of Environmental Sciences, Central University of Jammu, Rahya-Suchani, (Bagla) Samba, J&K, 181143, India
| | - Deepak Pathania
- Department of Environmental Sciences, Central University of Jammu, Rahya-Suchani, (Bagla) Samba, J&K, 181143, India.
| | - Anita Singh
- Department of Environmental Sciences, Central University of Jammu, Rahya-Suchani, (Bagla) Samba, J&K, 181143, India; Department of Environmental Studies, Central University of Haryana, Jant-Pali, Mahendergarh, 123031, Haryana, India.
| | - Zaheer Ud Din Sheikh
- Department of Environmental Sciences, Central University of Jammu, Rahya-Suchani, (Bagla) Samba, J&K, 181143, India
| | - Richa Kothari
- Department of Environmental Sciences, Central University of Jammu, Rahya-Suchani, (Bagla) Samba, J&K, 181143, India
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Rajesh R, Gummadi SN. Purification and biochemical characterization of novel α-amylase and cellulase from Bacillus sp. PM06. Prep Biochem Biotechnol 2024; 54:796-808. [PMID: 38141162 DOI: 10.1080/10826068.2023.2288574] [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] [Indexed: 12/25/2023]
Abstract
Bacillus sp. PM06, previously isolated from sugarcane waste pressmud, could produce dual enzymes α-amylase and cellulase. The isolate's crude enzymes were purified homogeneously using ammonium sulfate precipitation followed by High Quaternary amine anion exchange chromatography. Purified enzymes revealed the molecular weights of α-amylase and cellulase as 55 and 52 kDa, with a purification fold of 15.4 and 11.5, respectively. The specific activity of purified α-amylase and cellulase were 740.7 and 555.6 U/mg, respectively. It demonstrated a wide range of activity from pH 5.0 to 8.5, with an optimum pH of 5.5 and 6.4 for α-amylase and cellulase. The optimum temperature was 50 °C for α-amylase and 60 °C for cellulase. The kinetic parameters of purified α-amylase were 741.5 ± 3.75 µmol/min/mg, 1.154 ± 0.1 mM, and 589 ± 3.5/(s mM), using starch as a substrate. Whereas cellulase showed 556.3 ± 1.3 µmol/min/mg, 1.78 ± 0.1 mM, and 270.9 ± 3.8/(s mM) of Vmax, Km, Kcat/Km, respectively, using carboxymethyl cellulose (CMC) as substrate. Among the various substrates tested, α-amylase had a higher specificity for amylose and CMC for cellulase. Different inhibitors and activators were also examined. Ca2+ Mg2+, Co2+, and Mn2+ boosted α-amylase and cellulase activities. Cu2+ and Ni2+ both inhibited the enzyme activities. Enzymatic saccharification of wheat bran yielded 253.61 ± 1.7 and 147.5 ± 1.0 mg/g of reducing sugar within 12 and 24 h of incubation when treated with purified α-amylase and cellulase. A more significant amount of 397.7 ± 1.9 mg/g reducing sugars was released from wheat bran due to the synergetic effect of two enzymes. According to scanning electron micrograph analysis, wheat bran was effectively broken down by both enzymes.
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Affiliation(s)
- Rekha Rajesh
- Applied and Industrial Microbiology Laboratory, Department of Biotechnology, BJM School of Biosciences, Indian Institute of Technology Madras, Chennai, India
| | - Sathyanarayana N Gummadi
- Applied and Industrial Microbiology Laboratory, Department of Biotechnology, BJM School of Biosciences, Indian Institute of Technology Madras, Chennai, India
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Yupanqui-Mendoza SL, Sánchez-Moncada BJ, Las-Casas B, Castro-Alvarado ÁP. Simple one-step treatment for saccharification of mango peels using an optimized enzyme cocktail of Aspergillus niger ATCC 9642. Braz J Microbiol 2024; 55:1151-1166. [PMID: 38472698 PMCID: PMC11153387 DOI: 10.1007/s42770-024-01303-3] [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: 07/16/2023] [Accepted: 03/07/2024] [Indexed: 03/14/2024] Open
Abstract
Developing efficient microbiological methods to convert polysaccharide-rich materials into fermentable sugars, particularly monosaccharides, is vital for advancing the bioeconomy and producing renewable chemicals and energy sources. This study focused on optimizing the production conditions of an enzyme cocktail from Aspergillus niger ATCC 9642 using solid-state fermentation (SSF) and assessing its effectiveness in saccharifying mango peels through a simple, rapid, and efficient one-step process. A rotatable central composite design was employed to determine optimal conditions of moisture, time, and pH for enzyme production in SSF medium. The optimized enzyme cocktail exhibited cellulase activity (CMCase) at 6.28 U/g, filter paper activity (FPase) at 3.29 U/g, and pectinase activity at 117.02 U/g. These optimal activities were achieved with an SSF duration of 81 h, pH of 4.66, and a moisture content of 59%. The optimized enzyme cocktail effectively saccharified the mango peels without the need for chemical agents. The maximum saccharification yield reached approximately 81%, indicating efficient conversion of mango peels into sugars. The enzyme cocktail displayed consistent thermal stability within the tested temperature range of 30-60°C. Notably, the highest sugar release occurred within 36 h, with glucose, arabinose, galactose, and xylose being the primary monosaccharides released during saccharification. This study highlights the potential application of Aspergillus niger ATCC 9642 and SSF for enzymatic production, offering a simple and high-performance process for monosaccharide production. The optimized enzyme cocktail obtained through solid-state fermentation demonstrated efficient saccharification of mango peels, suggesting its suitability for industrial-scale applications.
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Affiliation(s)
- Sergio Luis Yupanqui-Mendoza
- Department of Biotechnology, Laboratory of Applied Bionanotechnology, Lorena School of Engineering, University of São Paulo, Lorena/SP, 12602-810, Brazil.
| | | | - Bruno Las-Casas
- Department of Biotechnology, Laboratory of Applied Bionanotechnology, Lorena School of Engineering, University of São Paulo, Lorena/SP, 12602-810, Brazil
| | - Ángel Pablo Castro-Alvarado
- Department of Science, Biotechnology Research Laboratory, National University of Santa, 02712, Chimbote, Peru
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John AJ, Selvarajan E. Ionic liquid-assisted pretreatment of lignocellulosic biomass using purified Streptomyces MS2A cellulase for bioethanol production. Int J Biol Macromol 2024; 270:132149. [PMID: 38740158 DOI: 10.1016/j.ijbiomac.2024.132149] [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: 02/13/2024] [Revised: 04/08/2024] [Accepted: 05/05/2024] [Indexed: 05/16/2024]
Abstract
In recent years, the process of producing bioethanol from lignocellulosic biomass through biorefining has become increasingly important. However, to obtain a high yield of ethanol, the complex structures in the feedstock must be broken down into simple sugars. A cost-effective and innovative method for achieving this is ionic liquid pre-treatment, which is widely used to efficiently hydrolyze the lignocellulosic material. The study aims to produce a significant profusion of bioethanol via catalytic hydrolysis of ionic liquid-treated lignocellulose biomass. The current study reports the purification of Streptomyces sp. MS2A cellulase via ultrafiltration and gel permeation chromatography. The kinetic parameters and the biochemical nature of the purified cellulase were analyzed for the effective breakdown of the EMIM[OAC] treated lignocellulose chain. The two-step cellulase purification resulted in 6.28 and 12.44 purification folds. The purified cellulase shows a Km value of 0.82 ± 0.21 mM, and a Vmax value of 85.59 ± 8.87 μmol min-1 mg-1 with the catalytic efficiency of 1.027 S-1. The thermodynamic parameters like ΔH, ΔS, and ΔG of the system were studied along with the thermal deactivation kinetics of cellulase. The optimal temperature and pH of the purified cellulase enzyme for hydrolysis was found to be 40 °C and 7. The rice husk and wheat husk used in this study were pretreated with the EMIM [OAC] ionic liquid and the change in the structure of lignocellulosic biomass was observed via HRSEM. The ionic liquid treated biomass showed the highest catalytic hydrolysis yield of 106.66 ± 0.19 mol/ml on the third day. The obtained glucose was fermented with Saccharomyces cerevisiae to yield 23.43 g of ethanol/l of glucose from the rice husk (RH) and 24.28 g of ethanol/l of glucose from the wheat husk (WH).
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Affiliation(s)
- Ashwini J John
- Department of Genetic Engineering, School of Bioengineering, College of Engineering and Technology, SRM Institute of Science and Technology, Kattankulathur, Tamil Nadu, India
| | - Ethiraj Selvarajan
- Department of Genetic Engineering, School of Bioengineering, College of Engineering and Technology, SRM Institute of Science and Technology, Kattankulathur, Tamil Nadu, India.
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Ahmad W, Zafar M, Anwar Z. Heterologous expression and characterization of mutant cellulase from indigenous strain of Aspergillus niger. PLoS One 2024; 19:e0298716. [PMID: 38748703 PMCID: PMC11095671 DOI: 10.1371/journal.pone.0298716] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2024] [Accepted: 04/18/2024] [Indexed: 05/19/2024] Open
Abstract
The purpose of current research work was to investigate the effect of mutagenesis on endoglucanase B activity of indigenous strain of Aspergillus niger and its heterologous expression studies in the pET28a+ vector. The physical and chemical mutagens were employed to incorporate mutations in A. niger. For determination of mutations, mRNA was isolated followed by cDNA synthesis and cellulase gene was amplified, purified and sequenced both from native and mutant A. niger. On comparison of gene sequences, it was observed that 5 nucleotide base pairs have been replaced in the mutant cellulase. The mutant recombinant enzyme showed 4.5 times higher activity (428.5 µmol/mL/min) as compared to activity of native enzyme (94 µmol/mL/min). The mutant gene was further investigated using Phyre2 and I-Tesser tools which exhibited 71% structural homology with Endoglucanase B of Thermoascus aurantiacus. The root mean square deviation (RMSD), root mean square fluctuation (RMSF), solvent accessible surface area (SASA), radius of gyration (Rg) and hydrogen bonds analysis were carried at 35°C and 50°C to explore the integrity of structure of recombinant mutant endoglucanase B which corresponded to its optimal temperature. Hydrogen bonds analysis showed more stability of recombinant mutant endoglucanase B as compared to native enzyme. Both native and mutant endoglucanase B genes were expressed in pET 28a+ and purified with nickel affinity chromatography. Theoretical masses determined through ExPaSy Protparam were found 38.7 and 38.5 kDa for native and mutant enzymes, respectively. The optimal pH and temperature values for the mutant were 5.0 and 50°C while for native these were found 4.0 and 35°C, respectively. On reacting with carboxy methyl cellulose (CMC) as substrate, the mutant enzyme exhibited less Km (0.452 mg/mL) and more Vmax (50.25 µmol/ml/min) as compared to native having 0.534 mg/mL as Km and 38.76 µmol/ml/min as Vmax. Among metal ions, Mg2+ showed maximum inducing effect (200%) on cellulase activity at 50 mM concentration followed by Ca2+ (140%) at 100 mM concentration. Hence, expression of a recombinant mutant cellulase from A. niger significantly enhanced its cellulytic potential which could be employed for further industrial applications at pilot scale.
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Affiliation(s)
- Waqas Ahmad
- Department of Biochemistry and Biotechnology, University of Gujrat, Hafiz Hayat Campus, Gujrat, Pakistan
| | - Muddassar Zafar
- Department of Biochemistry and Biotechnology, University of Gujrat, Hafiz Hayat Campus, Gujrat, Pakistan
| | - Zahid Anwar
- Department of Biochemistry and Biotechnology, University of Gujrat, Hafiz Hayat Campus, Gujrat, Pakistan
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Bhattacharya R, Arora S, Ghosh S. Bioprocess optimization for food-grade cellulolytic enzyme production from sorghum waste in a novel solid-state fermentation bioreactor for enhanced apple juice clarification. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2024; 358:120781. [PMID: 38608570 DOI: 10.1016/j.jenvman.2024.120781] [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: 01/06/2024] [Revised: 02/27/2024] [Accepted: 03/27/2024] [Indexed: 04/14/2024]
Abstract
Transforming global agricultural waste into eco-friendly products like industrial enzymes through bioconversion can help address sustainability challenges aligning with the United Nations' Sustainable Development Goals. Present study explored the production of high-yield food-grade cellulolytic enzymes from Trichoderma reesei MTCC 4876, using a novel media formulation with a combination of waste sorghum grass and cottonseed oil cake (3:1). Optimization of physical and environmental parameters, along with the screening and optimization of media components, led to an upscaled process in a novel 6-L solid-state fermentation (SSF)-packed bed reactor (PBR) with a substrate loading of 200 g. Saturated forced aeration proved crucial, resulting in high fungal biomass (31.15 ± 0.63 mg glucosamine/gm dry fermented substrate) and high yield cellulase (20.64 ± 0.36 FPU/g-ds) and xylanase (16,186 ± 912 IU/g-ds) production at an optimal airflow rate of 0.75 LPM. The PBR exhibited higher productivity than shake flasks for all the enzyme systems. Microfiltration and ultrafiltration of the crude cellulolytic extract achieved 94% and 71% recovery, respectively, with 13.54 FPU/mL activity in the cellulolytic enzyme concentrate. The concentrate displayed stability across wide pH and temperature ranges, with a half-life of 24.5-h at 50 °C. The cellulase concentrate, validated for food-grade safety, complies with permissible limits for potential pathogens, heavy metals, mycotoxins, and pesticide residue. It significantly improved apple juice clarity (94.37 T%) by reducing turbidity (21%) and viscosity (99%) while increasing total reducing sugar release by 63% compared with untreated juice. The study also highlighted the potential use of lignin-rich fermented end residue for fuel pellets within permissible SOx emission limits, offering sustainable biorefinery prospects. Utilizing agro wastes in a controlled bioreactor environment underscores the potential for efficient large-scale cellulase production, enabling integration into food-grade applications and presenting economic benefits to fruit juice industries.
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Affiliation(s)
- Raikamal Bhattacharya
- Department of Biosciences and Bioengineering, Indian Institute of Technology Roorkee, Roorkee, Uttarakhand, 247667, India.
| | - Sidharth Arora
- Fermentech Labs Pvt. Ltd, TIDES Business Incubator, Indian Institute of Technology Roorkee, Roorkee, Uttarakhand, 247667, India.
| | - Sanjoy Ghosh
- Department of Biosciences and Bioengineering, Indian Institute of Technology Roorkee, Roorkee, Uttarakhand, 247667, India.
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Abdella MAA, Ahmed NE, Hasanin MS. Green ecofriendly enhancement of cellulase productivity using agricultural wastes by Aspergillus terreus MN901491: statistical designs and detergent ability on cotton fabrics. Microb Cell Fact 2024; 23:109. [PMID: 38609920 PMCID: PMC11015618 DOI: 10.1186/s12934-024-02376-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2024] [Accepted: 03/19/2024] [Indexed: 04/14/2024] Open
Abstract
BACKGROUND Cellulase is considered a group member of the hydrolytic enzymes, responsible for catalyzing the hydrolysis of cellulose and has various industrial applications. Agricultural wastes are used as an inexpensive source for several utilizable products throughout the world. So, searching for cellulase enzymes from fungal strains capable of utilizing agricultural wastes to increase productivity, reduce costs and overcome waste accumulation in the environment is very important to evaluate its potency as a bio-additive to detergent agents. RESULTS In the current study, the previously identified fungal strain Aspergillus terreus MN901491 was screened and selected for cellulase production. Medium parameters were optimized using one-factor-at-a-time (OFAT) and multi-factorial (Plackett-Burman and Box-Behnken) design methods. OFAT showed the ability of the fungal strain to utilize agricultural wastes (corn cob and rice straw) as a substrate. Also, yeast extract was the best nitrogen source for enhancing cellulase productivity. The most significant variables were determined by Plackett-Burman Design (PBD) and their concentrations were optimized by Response Surface Methodology (RSM) using Box-Behnken Design (BBD). Among eleven independent variables screened by PBD, malt extract, (NH4)2SO4, and KCl were the most significant ones followed by rice straw which affected cellulase production positively. The ANOVA results particularly the R2-value of PBD (0.9879) and BBD (0.9883) confirmed the model efficiency and provided a good interpretation of the experiments. PBD and BBD improved cellulase productivity by 6.1-fold greater than that obtained from OFAT. Medium optimization using OFAT and statistical models increased cellulase production from A. terreus MN901491 by 9.3-fold compared to the non-optimized medium. Moreover, the efficiency of cellulase activity on cotton fabrics as a bio-additive detergent was evaluated and estimated using whiteness and scanning electron microscope (SEM) that affirmed its potential effect and remarkable detergent ability to improve whiteness by 200% in comparison with non-washed fabric and by 190% in comparison with fabric washed by water. CONCLUSION The presented work was stabilized as a multi-efficiency in which wastes were used to produce cellulase enzyme from the fungal strain, Aspergillus terreus MN901491 as a bio-additive to detergent applications that involved ecofriendly and green processes.
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Affiliation(s)
- Mohamed A A Abdella
- Chemistry of Natural and Microbial Products Department, Pharmaceutical and Drug Industries Research Institute, National Research Centre, Dokki, Giza, 12622, Egypt.
| | - Nehad E Ahmed
- Chemistry of Natural and Microbial Products Department, Pharmaceutical and Drug Industries Research Institute, National Research Centre, Dokki, Giza, 12622, Egypt
| | - Mohamed S Hasanin
- Cellulose and Paper Department, National Research Centre, Dokki, Giza, 12622, Egypt
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Kalita BJ, Sit N. Characterization of cellulase immobilized by different methods of entrapment and its application for carrot juice extraction. Food Sci Biotechnol 2024; 33:1163-1175. [PMID: 38440682 PMCID: PMC10908674 DOI: 10.1007/s10068-023-01422-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2023] [Revised: 08/07/2023] [Accepted: 08/13/2023] [Indexed: 03/06/2024] Open
Abstract
In the present study, cellulase has been immobilized by two different methods of entrapment viz. encapsulation in calcium alginate and matrix entrapment in agar. The calcium alginate encapsulated beads showed an immobilization efficiency of 92.11% and agar entrapped cubes showed an immobilization efficiency of 97.63%. The free cellulase was found to show optimum activity at 50 °C and pH 4, had a Km of 39.29 mg/mL, Vmax of 0.50 μmol/min. The calcium alginate encapsulated beads showed optimum activity at 50 °C, and pH 8, had a Km of 72.28 mg/mL and Vmax of 1.32 μmol/min. The agar entrapped cubes showed optimum activity at 60 °C, and pH 4, had a Km of 13.08 mg/mL, and Vmax of 0.38 μmol/min. The immobilized cellulases could be used for 5 cycles after which their activity deteriorated. The immobilized as well as the free enzyme were effective in increasing the yield of carrot juice.
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Affiliation(s)
- Bhaskar Jyoti Kalita
- Department of Food Engineering and Technology, Tezpur University, Tezpur, Assam 784028 India
| | - Nandan Sit
- Department of Food Engineering and Technology, Tezpur University, Tezpur, Assam 784028 India
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Sutaoney P, Rai SN, Sinha S, Choudhary R, Gupta AK, Singh SK, Banerjee P. Current perspective in research and industrial applications of microbial cellulases. Int J Biol Macromol 2024; 264:130639. [PMID: 38453122 DOI: 10.1016/j.ijbiomac.2024.130639] [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: 08/29/2023] [Revised: 01/12/2024] [Accepted: 03/03/2024] [Indexed: 03/09/2024]
Abstract
The natural interactions between various bacteria, fungi, and other cellulolytic microorganisms destroy lignocellulosic polymers. The efficacy of this process is determined by the combined action of three main enzymes: endoglucanases, exo-glucanases, and β-glucosidase. The enzyme attacks the polymeric structure's β-1,4-linkages during the cellulose breakdown reaction. This mechanism is crucial for the environment as it recycles cellulose in the biosphere. However, there are problems with enzymatic cellulose breakdown, including complex cellulase structure, insufficient degradation efficacy, high production costs, and post-translational alterations, many of which are closely related to certain unidentified cellulase properties. These issues impede the practical use of cellulases. A developing area of research is the application of this similar paradigm for industrial objectives. Cellulase enzyme exhibits greater promise in many critical industries, including biofuel manufacture, textile smoothing and finishing, paper and pulp manufacturing, and farming. However, the study on cellulolytic enzymes must move forward in various directions, including increasing the activity of cellulase as well as designing peptides to give biocatalysts their desired attributes. This manuscript includes an overview of current research on different sources of cellulases, their production, and biochemical characterization.
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Affiliation(s)
- Priya Sutaoney
- Present address-Department of Microbiology, Kalinga University, Raipur 492101, Chhattisgarh, India; Microbiology Laboratory, School of Studies in Life Science, Pt. Ravishankar Shukla University, Raipur 492010, Chhattisgarh, India
| | - Sachchida Nand Rai
- Centre of Experimental Medicine and Surgery, Institute of Medical Sciences, Banaras Hindu University, Varanasi 221005, India
| | - Sakshi Sinha
- Present address-Department of Microbiology, Kalinga University, Raipur 492101, Chhattisgarh, India
| | - Rachana Choudhary
- Department of Microbiology, Shri Shankaracharya Mahavidyalaya, Junwani, Durg 490005, Chhattisgarh, India
| | - A K Gupta
- Microbiology Laboratory, School of Studies in Life Science, Pt. Ravishankar Shukla University, Raipur 492010, Chhattisgarh, India
| | - Santosh Kumar Singh
- Centre of Experimental Medicine and Surgery, Institute of Medical Sciences, Banaras Hindu University, Varanasi 221005, India.
| | - Paromita Banerjee
- Department of Cardiology, All India Institute of Medical Sciences, Rishikesh, 249203, Uttarakhand, India.
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Ma X, Li S, Tong X, Liu K. An overview on the current status and future prospects in Aspergillus cellulase production. ENVIRONMENTAL RESEARCH 2024; 244:117866. [PMID: 38061590 DOI: 10.1016/j.envres.2023.117866] [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: 09/24/2023] [Revised: 12/01/2023] [Accepted: 12/02/2023] [Indexed: 12/17/2023]
Abstract
Cellulase is a new research point besides glucoamylase, amylase, and protease in the enzyme industry. Cellulase can decompose lignocellulosic biomass into small-molecule sugars, which facilitates microbial utilization; thus, it has a vast market potential in the field of feed, food, energy, and chemistry. The Aspergillus was the first strain used in cellulase preparation because of its safety and non-toxicity, strong growth ability, and high enzyme yield. This review provides the latest research and advances on preparing cellulase from Aspergillus. The metabolic mechanisms of cellulase secretion by Aspergillus, the selection of fermentation substrates, the comparison of the fermentation modes, and the effect of fermentation conditions have been discussed in this review. Also, the subsequent separation and purification techniques of Aspergillus cellulase, including salting out, organic solvent precipitation, ultrafiltration, and chromatography, have been declared. Further, bottlenecks in Aspergillus cellulase preparation and corresponding feasible approaches, such as genetic engineering, mixed culture, and cellulase immobilization, have also been proposed in this review. This paper provides theoretical support for the efficient production and application of Aspergillus cellulase.
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Affiliation(s)
- Xiaoyu Ma
- China Institute of Geo-Environment Monitoring, China Geological Survey, Beijing 100081, China
| | - Shengpin Li
- China Institute of Geo-Environment Monitoring, China Geological Survey, Beijing 100081, China
| | - Xiaoxia Tong
- China Institute of Geo-Environment Monitoring, China Geological Survey, Beijing 100081, China
| | - Kun Liu
- China Institute of Geo-Environment Monitoring, China Geological Survey, Beijing 100081, China.
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Ismail SA, El-Hawary NS, Hassan AA, El-Sayed H. Non-deteriorative eco-friendly water-saving tactic for removal of vegetable matters from wool fleece using xylanase and cellulase. Int J Biol Macromol 2023; 253:126648. [PMID: 37673140 DOI: 10.1016/j.ijbiomac.2023.126648] [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: 05/16/2023] [Revised: 08/25/2023] [Accepted: 08/30/2023] [Indexed: 09/08/2023]
Abstract
The carbonization of wool fleece (WF) is conducted to remove the adhered vegetable matter (VM) from contaminated WF using sulfuric acid, followed by drying and backing. This process has a deteriorative effect on WF and requires a tremendous quantity of water for rinsing WF after carbonization to remove any H2SO4 residuals. Herein, we propose an alternative eco-friendly water-saving process for the removal of VM from WF using enzymes. Cellulase-containing xylanase from the fungus Aspergillus terreus, and cellulase-free xylanase from the fungus Aspergillus flavus AW1 were used to remove the VM from WF. The effect of some process parameters on the amount of the removed VM was assessed. Alkali solubility as well as sulfur and cystine content were used to follow the alteration in the chemistry of the bio-treated WF. The fiber morphology was examined using scanning electron microscopy. The dyeability of the treated WF towards acid, reactive, and basic dyes was monitored. The results revealed that the removal of the VM from WF by applying the examined enzymes was effective and could be an appropriate, non-destructive, eco-friendly water-saving substitute to the conventional carbonization procedures. By virtue of enzyme specificity, the proposed process removed the VM without deteriorating the fiber.
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Affiliation(s)
- Shaymaa A Ismail
- Department of Chemistry of Natural and Microbial Products, Pharmaceutical and Drug Industries Research Institute, National Research Centre, El Bohouth St., Dokki, Giza 12622, Egypt
| | - Nancy S El-Hawary
- Dyeing, Printing, and Textile Auxiliaries Department, Textile Research and Technology Institute, National Research Centre, El Bohouth Street, Dokki, Giza 12622, Egypt
| | - Amira A Hassan
- Department of Chemistry of Natural and Microbial Products, Pharmaceutical and Drug Industries Research Institute, National Research Centre, El Bohouth St., Dokki, Giza 12622, Egypt
| | - Hosam El-Sayed
- Proteinic and Man-made Fibers Department, Textile Research and Technology Institute, National Research Centre, El Bohouth Street, Dokki, Giza 12622, Egypt.
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Tripathi M, Lal B, Syed A, Mishra PK, Elgorban AM, Verma M, Singh R, Mohammad A, Srivastava N. Production of fermentable glucose from bioconversion of cellulose using efficient microbial cellulases produced from water hyacinth waste. Int J Biol Macromol 2023; 252:126376. [PMID: 37595712 DOI: 10.1016/j.ijbiomac.2023.126376] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2022] [Revised: 08/04/2023] [Accepted: 08/15/2023] [Indexed: 08/20/2023]
Abstract
The economic production of cellulase enzymes for various industrial applications is one of the major research areas. A number of broad industrial applications, for example, in cellulosic biomass hydrolysis for simple sugars such as glucose and subsequent biofuel production, make these enzyme systems the third most demanding enzymes. Nevertheless, due to their production on commercial substrates, cellulases fall into the category of costly enzymes. Therefore, the goal of the present work is to evaluate the enhancement of cellulase production and its utilization in the enzymatic hydrolysis of biomass using low-cost cellulosic substrate, which is abundant and widely available. In this context, waste biomasses of water hyacinth (WH), including leaves and stems, have been used as feedstock to produce cellulases via solid-state fermentation (SSF) in the current study, which improves its production as well as activity. Furthermore, the impact of process parameters like temperature and pH has been investigated for improved cellulase production. At optimum concentration using 10 g of feedstock, 22 IU/gds of FP, 92 IU/gds of BGL, and 111 IU/gds of EG have been noticed in day 5 of SSF. Herein, 40 °C has been identified as the optimum temperature for cellulase production, whereas 50-55 °C has been recorded as the optimum reaction temperature for cellulase enzyme activity. Additionally, pH 5.5 has been identified as the optimum pH for cellulase enzyme production, whereas this enzyme was thermally stable (55 °C) at pH 5.0 up to 3.5 h. Further, the cellulosic biomass hydrolysis of WH leaves via an optimized crude enzyme has been performed, and this could release 24.34 g/L of glucose in 24 h of the reaction. The current findings may have potential for developing cellulases for mass-scale production using WH-based waste bioresources for numerous biorefinery applications.
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Affiliation(s)
- Manikant Tripathi
- Biotechnology Program, Dr. Rammanohar Lohia Avadh University, Ayodhya 224001, Uttar Pradesh, India.
| | - Basant Lal
- Department of Chemistry, Institute of Applied Sciences and Humanities, GLA University, Mathura 281406, India
| | - Asad Syed
- Department of Botany and Microbiology, College of Science, King Saud University, P.O. 2455, Riyadh 11451, Saudi Arabia
| | - P K Mishra
- Department of Chemical Engineering and Technology, Indian Institute of Technology (BHU), Varanasi, India, 221005
| | - Abdallah M Elgorban
- Department of Botany and Microbiology, College of Science, King Saud University, P.O. 2455, Riyadh 11451, Saudi Arabia
| | - Meenakshi Verma
- University Centre for Research & Development, Department of Chemistry, Chandigarh University, Gharuan, Mohali 140413, India
| | - Rajeev Singh
- Department of Environmental Science, Jamia Millia Islamia (A Central University), New Delhi 110025, India
| | - Akbar Mohammad
- School of Chemical Engineering, Yeungnam University, Gyeongsan 38541, Republic of Korea
| | - Neha Srivastava
- Department of Chemical Engineering and Technology, Indian Institute of Technology (BHU), Varanasi, India, 221005.
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13
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Kumar P, Kermanshahi-pour A, Brar SK, Xu CC, He QS, Evans S, Rainey JK. Enzymatic digestibility of lignocellulosic wood biomass: Effect of enzyme treatment in supercritical carbon dioxide and biomass pretreatment. Heliyon 2023; 9:e21811. [PMID: 38027598 PMCID: PMC10660486 DOI: 10.1016/j.heliyon.2023.e21811] [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: 06/29/2023] [Revised: 10/20/2023] [Accepted: 10/29/2023] [Indexed: 12/01/2023] Open
Abstract
Energy and resource intensive mechanical and chemical pretreatment along with the use of hazardous chemicals are major bottlenecks in widespread lignocellulosic biomass utilization. Herein, the study investigated different pretreatment methods on spruce wood namely supercritical CO2 (scCO2) pretreatment, ultrasound-assisted alkaline pretreatment, and acetosolv pulping-alkaline hydrogen peroxide bleaching, to enhance the enzymatic digestibility of wood using optimized enzyme cocktail. Also, the effect of scCO2 pretreatment on enzyme cocktail was investigated after optimizing the concentration and temperature of cellulolytic enzymes. The impact of scCO2 and ultrasound-assisted alkaline pretreatments of wood were insignificant for the enzymatic digestibility, and acetosolv pulping-alkaline hydrogen peroxide bleaching was the most effective pretreatment that showed the release of total reducing sugar yield (TRS) of ∼95.0 wt% of total hydrolyzable sugars (THS) in enzymatic hydrolysis. The optimized enzyme cocktail showed higher yield than individual enzymes with degree of synergism 1.34 among the enzymes, and scCO2 pretreatment of cocktail for 0.5-1.0 h at 10.0-22.0 MPa and 38.0-54.0 °C had insignificant effect on the enzyme's primary and global secondary structure of cocktail and its activity.
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Affiliation(s)
- Pawan Kumar
- Biorefining and Remediation Laboratory, Department of Process Engineering and Applied Science, Dalhousie University, Halifax, Nova Scotia B3 J 1Z1, Canada
| | - Azadeh Kermanshahi-pour
- Biorefining and Remediation Laboratory, Department of Process Engineering and Applied Science, Dalhousie University, Halifax, Nova Scotia B3 J 1Z1, Canada
| | - Satinder Kaur Brar
- Department of Civil Engineering, Lassonde School of Engineering, York University, North York, Toronto, Ontario M3J 1P3, Canada
| | - Chunbao Charles Xu
- School of Energy and Environment, City University of Hong Kong, Hong Kong SAR, Hong Kong
| | - Quan Sophia He
- Department of Engineering, Faculty of Agriculture, Dalhousie University, Truro, Nova Scotia B2N 5E3, Canada
| | - Sara Evans
- Department of Chemistry, Dalhousie University, Halifax, Nova Scotia B3H 4R2, Canada
| | - Jan K. Rainey
- Department of Chemistry, Dalhousie University, Halifax, Nova Scotia B3H 4R2, Canada
- Department of Biochemistry & Molecular Biology and School of Biomedical Engineering, Dalhousie University, Halifax, Nova Scotia B3H 4R2, Canada
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14
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Lagunes-Reyes M, Sánchez JE, Andrade-Gallegos RH, Gutiérrez-Hernández RF, Camacho-Morales RL. Biodegradation of agave Comiteco bagasse by Pleurotus spp.: a source of cellulases useful in hydrolytic treatment to produce reducing sugars. 3 Biotech 2023; 13:356. [PMID: 37814639 PMCID: PMC10560175 DOI: 10.1007/s13205-023-03783-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2023] [Accepted: 09/20/2023] [Indexed: 10/11/2023] Open
Abstract
This study aimed to determine the production parameters of five strains of Pleurotus spp. during their cultivation on agave Comiteco bagasse, as well as the feasibility of using cellulolytic extracts to produce reducing sugars in the same bagasse. After cultivation, the basidiome production parameters varied between 41.2 and 65.7% (biological efficiency), 0.17 and 0.30 (yield), 0.60 and 0.90% (production rate), 16.4 and 41.1% (Bioconversion) and 9.4 and 21.3 g (mean mushroom weight). At day 15 of growth, P. djamor showed the highest β-glucosidase activity (43.95 ± 4.5 IU/g); on day 33. The same strain had the highest endoglucanase activity (21.12 ± 0.5 IU/ml). Both extracts were partially purified, and the kinetic parameters Vmax and Km were estimated (20.83 µmole/ml sec and 232.01 µmole/ml for β-glucosidase and 685.01 µmole/ml sec and 1,240.34 µmole/ml for endoglucanase). In the enzymatic hydrolysis assay, the highest concentration of reducing sugars (43.13 ± 1.09 g/L; 0.21 g/g bagasse) was obtained by a mixture of the two partially purified extracts acting synergistically after 48 h and with a pH adjustment. The results suggest that the use of agave Comiteco bagasse for cultivating edible mushrooms while obtaining cellulolytic extracts is an alternative treatment for waste reduction and valorization of agro-industrial by-products.
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Affiliation(s)
- Miriam Lagunes-Reyes
- El Colegio de la Frontera Sur, Carr. Antiguo Aeropuerto km 2.5, 30700 Tapachula, Chiapas Mexico
| | - José E Sánchez
- El Colegio de la Frontera Sur, Carr. Antiguo Aeropuerto km 2.5, 30700 Tapachula, Chiapas Mexico
| | | | - Rubén F. Gutiérrez-Hernández
- Departamento de Ingeniería Química y Bioquímica, Instituto Tecnológico de Tapachula, Tecnológico Nacional de México, 30700 Tapachula, Chiapas Mexico
| | - Reyna L. Camacho-Morales
- Instituto de Ciencias Agrícolas, Universidad Autónoma de Baja California, Álvaro Obregón s/n, Nueva, 21100 Mexicali, BC Mexico
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15
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Ascacio-Valdés A, De León-Medina J, De León-Zapata M, Laredo-Alcalá E, Flores-Gallegos A, Meléndez-Rentería N. Sustainable use of giant reed to produce industrialized enzymes. Heliyon 2023; 9:e18748. [PMID: 37576231 PMCID: PMC10412830 DOI: 10.1016/j.heliyon.2023.e18748] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2023] [Revised: 07/24/2023] [Accepted: 07/26/2023] [Indexed: 08/15/2023] Open
Abstract
The giant reed (Arundo donax) is a fast-growing plant adapted to different climatic and soil conditions; although its origin is Asian, the species has spread throughout the world. During its development, it consumes three times more water than typical native vegetation and is responsible for changing the landscape of riparian areas; the high biomass productivity and the annual harvest period make this crop an alternative to produce and/or extract industrial bioproducts. The main objective of this research was to evaluate the feasibility of using giant reed in a bioprocess that produces enzymes by a solid-state fermentation experiment, four fungal species were tested (Aspergillus niger GH1, Aspergillus niger PSH, Trichoderma harzianum, and Rhizopus oryzae); enzyme activities were performed using reported methodologies varying only reaction volumes. The A. niger GH1 and PSH strains were the best adapted to the plant material, A. niger GH1 was capable to produce 4 of the 5 evaluated enzymes (cellulase-endoglucanase (174.39 ± 19.62 U/L), xylanase (1313.31 ± 39.25 U/L), invertase (642.22 ± 23.55 U/L), and polyphenol oxidase (6094.01 ± 306.54) while A. niger PSH was able to produce 3 of the 5 evaluated enzymes (cellulase-endoglucanase (147.09 ± 13.88 U/L), xylanase (1307.76 ± 31.40 U/L), and invertase (603.92 ± 3.14 U/L).
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Affiliation(s)
- A. Ascacio-Valdés
- Food Research Department, Faculty of Chemical Sciences, Autonomous University of Coahuila, Boulevard Venustiano Carranza without number, 25280, Saltillo, Mexico
- Research Center for the Conservation of Biodiversity and Ecology of Coahuila, Autonomous University of Coahuila, Hidalgo 212 central zone, 27540, Cuatrociénegas, Mexico
| | - J.C. De León-Medina
- Food Research Department, Faculty of Chemical Sciences, Autonomous University of Coahuila, Boulevard Venustiano Carranza without number, 25280, Saltillo, Mexico
| | - M.A. De León-Zapata
- Research Center for the Conservation of Biodiversity and Ecology of Coahuila, Autonomous University of Coahuila, Hidalgo 212 central zone, 27540, Cuatrociénegas, Mexico
| | - E.I. Laredo-Alcalá
- Research Center for the Conservation of Biodiversity and Ecology of Coahuila, Autonomous University of Coahuila, Hidalgo 212 central zone, 27540, Cuatrociénegas, Mexico
| | - A.C. Flores-Gallegos
- Food Research Department, Faculty of Chemical Sciences, Autonomous University of Coahuila, Boulevard Venustiano Carranza without number, 25280, Saltillo, Mexico
| | - N.P. Meléndez-Rentería
- Research Center for the Conservation of Biodiversity and Ecology of Coahuila, Autonomous University of Coahuila, Hidalgo 212 central zone, 27540, Cuatrociénegas, Mexico
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16
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Le Strat Y, Mandin M, Ruiz N, Robiou du Pont T, Ragueneau E, Barnett A, Déléris P, Dumay J. Quantification of Xylanolytic and Cellulolytic Activities of Fungal Strains Isolated from Palmaria palmata to Enhance R-Phycoerythrin Extraction of Palmaria palmata: From Seaweed to Seaweed. Mar Drugs 2023; 21:393. [PMID: 37504924 PMCID: PMC10381405 DOI: 10.3390/md21070393] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2023] [Revised: 06/21/2023] [Accepted: 06/29/2023] [Indexed: 07/29/2023] Open
Abstract
R-phycoerythrin (R-PE) can be enzymatically extracted from red seaweeds such as Palmaria palmata. This pigment has numerous applications and is notably known as an antioxidant, antitumoral or anti-inflammatory agent. Enzymes secreted by P. palmata associated fungal strains were assumed to be efficient and adapted for R-PE extraction from this macroalga. The aim of the present study was to quantify both xylanolytic and cellulolytic activities of enzymatic extracts obtained from six Palmaria palmata derived fungal strains. Degradation of P. palmata biomass by fungal enzymatic extracts was also investigated, focused on soluble protein and R-PE extraction. Enzymatic extracts were obtained by solid state fermentation. Macroalgal degradation abilities were evaluated by measuring reducing sugar release using DNS assays. Soluble proteins and R-PE recovery yields were evaluated through bicinchoninic acid and spectrophotometric assays, respectively. Various enzymatic activities were obtained according to fungal isolates up to 978 U/mL for xylanase and 50 U/mL for cellulase. Enzymatic extract allowed high degrading abilities, with four of the six fungal strains assessed exhibiting at least equal results as the commercial enzymes for the reducing sugar release. Similarly, all six strains allowed the same soluble protein extraction yield and four of them led to an improvement of R-PE extraction. R-PE extraction from P. palamata using marine fungal enzymes appeared particularly promising. To the best of our knowledge, this study is the first on the use of enzymes of P. palmata associated fungi in the degradation of its own biomass for biomolecules recovery.
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Affiliation(s)
- Yoran Le Strat
- Nantes Université, Institut des Substances et Organismes de la Mer, ISOMer, UR 2160, F-44000 Nantes, France
| | - Margaux Mandin
- Nantes Université, Institut des Substances et Organismes de la Mer, ISOMer, UR 2160, F-44000 Nantes, France
| | - Nicolas Ruiz
- Nantes Université, Institut des Substances et Organismes de la Mer, ISOMer, UR 2160, F-44000 Nantes, France
| | - Thibaut Robiou du Pont
- Nantes Université, Institut des Substances et Organismes de la Mer, ISOMer, UR 2160, F-44000 Nantes, France
| | - Emilie Ragueneau
- Nantes Université, Institut des Substances et Organismes de la Mer, ISOMer, UR 2160, F-44000 Nantes, France
| | - Alexandre Barnett
- Nantes Université, Institut des Substances et Organismes de la Mer, ISOMer, UR 2160, F-44000 Nantes, France
| | - Paul Déléris
- Nantes Université, Institut des Substances et Organismes de la Mer, ISOMer, UR 2160, F-44000 Nantes, France
| | - Justine Dumay
- Nantes Université, Institut des Substances et Organismes de la Mer, ISOMer, UR 2160, F-44000 Nantes, France
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17
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Asiri M, Srivastava N, Singh R, Al Ali A, Tripathi SC, Alqahtani A, Saeed M, Srivastava M, Rai AK, Gupta VK. Rice straw derived graphene-silica based nanocomposite and its application in improved co-fermentative microbial enzyme production and functional stability. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 876:162765. [PMID: 36906037 DOI: 10.1016/j.scitotenv.2023.162765] [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: 12/28/2022] [Revised: 02/22/2023] [Accepted: 03/06/2023] [Indexed: 06/18/2023]
Abstract
Cellulases are the one of the most highly demanded industrial biocatalysts due to their versatile applications, such as in the biorefinery industry. However, relatively poor efficiency and high production costs are included as the key industrial constraints that hinder enzyme production and utilization at economic scale. Furthermore, the production and functional efficiency of the β-glucosidase (BGL) enzyme is usually found to be relatively low among the cellulase cocktail produced. Thus, the current study focuses on fungi-mediated improvement of BGL enzyme in the presence of a rice straw-derived graphene-silica-based nanocomposite (GSNCs), which has been characterized using various techniques to analyze its physicochemical properties. Under optimized conditions of solid-state fermentation (SSF), co-fermentation using co-cultured cellulolytic enzyme has been done, and maximum enzyme production of 42 IU/gds FP, 142 IU/gds BGL, and 103 IU/gds EG have been achieved at a 5 mg concentration of GSNCs. Moreover, at a 2.5 mg concentration of nanocatalyst, the BGL enzyme showed its thermal stability at 60°C and 70 °C by holding its half-life relative activity for 7 h, while the same enzyme demonstrated pH stability at pH 8.0 and 9.0 for the 10 h. This thermoalkali BGL enzyme might be useful for the long-term bioconversion of cellulosic biomass into sugar.
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Affiliation(s)
- Mohammed Asiri
- Department of Clinical Laboratory Sciences, College of Applied Medical Sciences, King Khalid University, Abha, Saudi Arabia
| | - Neha Srivastava
- Department of Chemical Engineering & Technology, Indian Institute of Technology (BHU) Varanasi, Varanasi 221005, Uttar Pradesh, India.
| | - Rajeev Singh
- Department of Environmental Science, Jamia Millia Islamia (A Central University), New Delhi 110025, India
| | - Amer Al Ali
- Department of Clinical Laboratory Sciences, Faculty of Applied Medical Sciences, University of Bisha, Al Nakhil, Bisha, Saudi Arabia
| | - Subhash C Tripathi
- Institute of Applied Sciences & Humanities, Department of Chemistry, GLA University, Mathura 281406, Uttar Pradesh, India
| | - Abdulaziz Alqahtani
- Department of Clinical Laboratory Sciences, College of Applied Medical Sciences, King Khalid University, Abha, Saudi Arabia
| | - Mohd Saeed
- Department of Biology, College of Sciences, University of Hail, Hail, Saudi Arabia
| | - Manish Srivastava
- Department of Chemical Engineering & Technology, Indian Institute of Technology (BHU) Varanasi, Varanasi 221005, Uttar Pradesh, India; LCB Fertilizer Pvt. Ltd., Shyam Vihar Phase 2, Rani Sati Mandir Road, Lachchhipur, Gorakhpur, Uttar Pradesh 273015, India
| | - Ashutosh Kumar Rai
- Department of Biochemistry, College of Medicine, Imam Abdulrahman Bin Faisal University, Dammam 31441, Saudi Arabia
| | - Vijai Kumar Gupta
- Biorefining and Advanced Materials Research Center, SRUC, Kings Buildings, West Mains Road, Edinburgh EH9 3JG, UK; Center for Safe and Improved Food, Scotland's Rural College (SRUC), Kings Buildings, West Mains Road, Edinburgh EH9 3JG, UK.
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18
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Singh N, Sithole BB, Govinden R. Optimisation of β-Glucosidase Production in a Crude Aspergillus japonicus VIT-SB1 Cellulase Cocktail Using One Variable at a Time and Statistical Methods and its Application in Cellulose Hydrolysis. Int J Mol Sci 2023; 24:9928. [PMID: 37373076 DOI: 10.3390/ijms24129928] [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: 05/09/2023] [Revised: 06/01/2023] [Accepted: 06/06/2023] [Indexed: 06/29/2023] Open
Abstract
Pulp and paper mill sludge (PPMS) is currently disposed of into landfills which are reaching their maximum capacity. Valorisation of PPMS by enzymatic hydrolysis using cellulases is an alternative strategy. Existing commercial cellulases are expensive and contain low titres of β-glucosidases. In this study, β-glucosidase production was optimised by Aspergillus japonicus VIT-SB1 to obtain higher β-glucosidase titres using the One Variable at a Time (OVAT), Plackett Burman (PBD), and Box Behnken design (BBD)of experiments and the efficiency of the optimised cellulase cocktail to hydrolyse cellulose was tested. β-Glucosidase production was enhanced from 0.4 to 10.13 U/mL, representing a 25.3-fold increase in production levels after optimisation. The optimal BBD production conditions were 6 days of fermentation at 20 °C, 125 rpm, 1.75% soy peptone, and 1.25% wheat bran in (pH 6.0) buffer. The optimal pH for β-glucosidase activity in the crude cellulase cocktail was (pH 5.0) at 50 °C. Optimal cellulose hydrolysis using the crude cellulase cocktail occurred at longer incubation times, and higher substrate loads and enzyme doses. Cellulose hydrolysis with the A. japonicus VIT-SB1 cellulase cocktail and commercial cellulase cocktails resulted in glucose yields of 15.12 and 12.33 µmol/mL glucose, respectively. Supplementation of the commercial cellulase cocktail with 0.25 U/mg of β-glucosidase resulted in a 19.8% increase in glucose yield.
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Affiliation(s)
- Nivisti Singh
- Discipline of Microbiology, School of Life Sciences, Westville Campus, University of KwaZulu-Natal, Durban 4001, South Africa
| | - Bishop Bruce Sithole
- Discipline of Engineering, Howard Campus, University of KwaZulu-Natal, Durban 4001, South Africa
| | - Roshini Govinden
- Discipline of Microbiology, School of Life Sciences, Westville Campus, University of KwaZulu-Natal, Durban 4001, South Africa
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19
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Hemida MH, Moustafa H, Mehanny S, Morsy M, Dufresne A, Abd EL Rahman EN, Ibrahim M. Cellulose nanocrystals from agricultural residues ( Eichhornia crassipes): Extraction and characterization. Heliyon 2023; 9:e16436. [PMID: 37292363 PMCID: PMC10245161 DOI: 10.1016/j.heliyon.2023.e16436] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2022] [Revised: 05/11/2023] [Accepted: 05/16/2023] [Indexed: 06/10/2023] Open
Abstract
Extraction of cellulose nanocrystals (CNCs) from agro-residues has received much attention, not only for their unique properties supporting a wide range of potential applications, but also their limited risk to global climate change. This research was conducted to assess Nile roses (Eichhornia crassipes) fibers as a natural biomass to extract CNCs through an acid hydrolysis approach. Nile roses fibers (NRFs) were initially subjected to alkaline (pulping) and bleaching pretreatments. Microcrystalline cellulose (MCC) was used as control in comparison to Nile rose based samples. All samples underwent acid hydrolysis process at a mild temperature (45 °C). The impact of extraction durations ranging from 5 to 30 min on the morphology structure and crystallinity index of the prepared CNCs was investigated. The prepared CNCs were subjected to various characterization techniques, namely: X-ray diffraction (XRD), FT-IR analysis, Transmission electron microscopy (TEM), and X-ray Photoelectron spectroscopy (XPS). The outcomes obtained by XRD showed that the crystallinity index increased as the duration of acid hydrolysis was prolonged up to 10 min, and then decreased, indicating optimal conditions for the dissolution of amorphous zones of cellulose before eroding the crystallized domains. These data were confirmed by FT-IR spectroscopy. However, a minor effect of hydrolysis duration on the degree of crystallinity was noticed for MCC based samples. TEM images illustrated that a spherical morphology of CNCs was formed as a result of 30 min acid hydrolysis, highlighting the optimal 20 min acid hydrolysis to obtain a fibrillar structure. The XPS study demonstrated that the main constituents of extracted CNCs were carbon and oxygen.
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Affiliation(s)
- Mohamed H. Hemida
- Agricultural Engineering Department, Faculty of Agriculture, Cairo University, Egypt
| | - Hesham Moustafa
- Department of Polymer Metrology & Technology, National Institute of Standards (NIS), Tersa Street, El Haram, P.O Box 136, Giza, 12211, Giza, Egypt
- Bioanalysis Laboratory, National Institute of Standards (NIS), Tersa Street, El Haram, P.O Box 136, Giza, 12211, Giza, Egypt
| | - Sherif Mehanny
- Department of Mechanical Design and Production, Faculty of Engineering, Cairo University, Egypt
| | - Mohamed Morsy
- Building Physics and Environment Institute, Housing and Building National Research Center (HBRC), Dokki, Giza, Egypt
- Nanotechnology Research Center (NTRC), The British University in Egypt (BUE), El Sherouk City, Suez Desert Road, Cairo, 11837, Egypt
| | - Alain Dufresne
- Université Grenoble Alpes, CNRS, Grenoble INP, LGP2, F-38000, Grenoble, France
| | - Eid N. Abd EL Rahman
- Agricultural Engineering Department, Faculty of Agriculture, Cairo University, Egypt
| | - M.M. Ibrahim
- Agricultural Engineering Department, Faculty of Agriculture, Cairo University, Egypt
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20
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An Insight into the Essential Role of Carbohydrate-Binding Modules in Enzymolysis of Xanthan. Int J Mol Sci 2023; 24:ijms24065480. [PMID: 36982553 PMCID: PMC10049358 DOI: 10.3390/ijms24065480] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2023] [Revised: 03/07/2023] [Accepted: 03/10/2023] [Indexed: 03/16/2023] Open
Abstract
To date, due to the low accessibility of enzymes to xanthan substrates, the enzymolysis of xanthan remains deficient, which hinders the industrial production of functional oligoxanthan. To enhance the enzymatic affinity against xanthan, the essential role of two carbohydrate binding modules—MiCBMx and PspCBM84, respectively, derived from Microbacterium sp. XT11 and Paenibacillus sp. 62047—in catalytic properties of endotype xanthanase MiXen were investigated for the first time. Basic characterizations and kinetic parameters of different recombinants revealed that, compared with MiCBMx, PspCBM84 dramatically increased the thermostability of endotype xanthanase, and endowed the enzyme with higher substrate affinity and catalytic efficiency. Notably, the activity of endotype xanthanase was increased by 16 times after being fused with PspCBM84. In addition, the presence of both CBMs obviously enabled endotype xanthanase to produce more oligoxanthan, and xanthan digests prepared by MiXen-CBM84 showed better antioxidant activity due to the higher content of active oligosaccharides. The results of this work lay a foundation for the rational design of endotype xanthanase and the industrial production of oligoxanthan in the future.
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21
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Bhati N, Shreya, Sharma AK. Strain improvement of Aspergillus uvarum CBS 121591 for improved production of cellulase and its immobilization on calcium alginate beads. Biologia (Bratisl) 2023. [DOI: 10.1007/s11756-023-01354-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/06/2023]
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22
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Naitam MG, Tomar GS, Kaushik R. Optimization and production of holocellulosic enzyme cocktail from fungi Aspergillus nidulans under solid-state fermentation for the production of poly(3-hydroxybutyrate). Fungal Biol Biotechnol 2022; 9:17. [PMID: 36527155 PMCID: PMC9758824 DOI: 10.1186/s40694-022-00147-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2022] [Accepted: 11/19/2022] [Indexed: 12/23/2022] Open
Abstract
The production of petroleum-based plastics increased dramatically following industrialization. Because of multifaceted properties such as durability, thermostability, water resistance, and many others, these plastics have become an indispensable part of daily life. However, while improving people's quality of life, indiscriminate use of plastics has caused pollution and raised environmental concerns. To address this situation and reduce environmental risks, microbially produced biopolymers such as poly-3-hydroxyalkanoates can be used to make bioplastics that are completely biodegradable under normal environmental conditions. At the moment, the cost of bioplastic production is high when compared to petroleum-based plastics, so alternate strategies for making the bioplastic process economical are urgently needed. Agricultural waste is abundant around the world and can be efficiently used as a low-cost renewable feedstock after pretreatment and enzymatic hydrolysis. Fungi are well known as primary degraders of lignocellulosic waste, and this property was used in the current study to enzymatically hydrolyze the pretreated paddy straw for the production of reducing sugars, which were then used in the microbial fermentation for the production of PHB. In this study, Aspergillus nidulans was used to advance a low-cost and efficient enzyme hydrolysis system for the generation of reducing sugars from lignocellulosic biomass. For the production of the holocellulosic enzyme complex, the fungus was grown on wheat straw with Reese mineral medium as a wetting agent. After 216 h of solid-state fermentation at 30 °C, pH 6.0, the enzyme extract from A. nidulans demonstrated the highest activity, CMCase 68.58 (± 0.55), FPase 12.0 (± 0.06), Xylanase 27.17 (± 0.83), and β-glucosidase 1.89 (± 0.037). The initial pH, incubation temperature, and time all had a significant impact on final enzyme activity. Enzymatic hydrolysis of pretreated paddy straw produced reducing sugars (8.484 to 30.91 gL-1) that were then used to produce poly(3-hydroxybutyrate) using halophilic bacterial isolates. Burkholderia gladioli 2S4R1 and Bacillus cereus LB7 accumulated 26.80% and 20.47% PHB of the cell dry weight, respectively. This suggests that the holocellulosic enzyme cocktail could play a role in the enzymatic hydrolysis of lignocellulosic materials and the production of PHA from less expensive feedstocks such as agricultural waste.
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Affiliation(s)
- Mayur G. Naitam
- grid.418196.30000 0001 2172 0814Division of Microbiology, ICAR-Indian Agricultural Research Institute, New Delhi, 110012 India
| | - Govind Singh Tomar
- grid.418196.30000 0001 2172 0814Division of Microbiology, ICAR-Indian Agricultural Research Institute, New Delhi, 110012 India
| | - Rajeev Kaushik
- grid.418196.30000 0001 2172 0814Division of Microbiology, ICAR-Indian Agricultural Research Institute, New Delhi, 110012 India
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Production of a halotolerant endo-1,4-β-glucanase by a newly isolated Bacillus velezensis H1 on olive mill wastes without pretreatment: purification and characterization of the enzyme. Arch Microbiol 2022; 204:681. [DOI: 10.1007/s00203-022-03300-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2022] [Revised: 09/07/2022] [Accepted: 10/21/2022] [Indexed: 11/25/2022]
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Das S, Das S, Ghangrekar MM. Enzymatic cell disruption followed by application of imposed potential for enhanced lipid extraction from wet algal biomass employing photosynthetic microbial fuel cell. BIORESOURCE TECHNOLOGY 2022; 363:127924. [PMID: 36096325 DOI: 10.1016/j.biortech.2022.127924] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/16/2022] [Revised: 09/03/2022] [Accepted: 09/05/2022] [Indexed: 06/15/2023]
Abstract
Solvent-free algal cell lysis using fungal enzyme for enhanced lipid recovery diminishes per unit production cost of algal biodiesel. In this investigation, a triple chamber photosynthetic microbial fuel cell (PMFC) was fabricated, where positive potential was imposed in the extraction chamber to draw the negatively charged lipid ions from the cathodic chamber. Under optimum imposed potential of + 3.0 V (vs standard hydrogen electrode) and with 3.5% (v/v) dosage of fungal enzyme in to the algal consortium of cathodic chamber, a maximum of 79.0% of lipid was recovered. Additionally, enzyme-assisted de-oiled algal biomass was applied in the anodic chamber to function as substrate and mediator for exo-electrogens, and the maximum power density of 10.0 W/m3 with 82.4% removal of chemical oxygen demand was achieved while treating synthetic wastewater. Therefore, this cost-effective exploration demonstrated successful bioelectricity production and concomitant wastewater treatment with solvent-free direct lipid recovery from wet algal biomass through PMFC.
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Affiliation(s)
- Swati Das
- PK Sinha Centre for Bioenergy & Renewables, Indian Institute of Technology Kharagpur, Kharagpur 721302, West Bengal, India
| | - Sovik Das
- Department of Civil Engineering, Indian Institute of Technology Kharagpur, Kharagpur 721302, West Bengal, India
| | - M M Ghangrekar
- PK Sinha Centre for Bioenergy & Renewables, Indian Institute of Technology Kharagpur, Kharagpur 721302, West Bengal, India; Department of Civil Engineering, Indian Institute of Technology Kharagpur, Kharagpur 721302, West Bengal, India.
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Fu ZH, Liu J, Zhong LB, Huang H, Zhu P, Wang CX, Bai XP. Screening of cellulose-degrading yeast and evaluation of its potential for degradation of coconut oil cake. Front Microbiol 2022; 13:996930. [PMID: 36274747 PMCID: PMC9583666 DOI: 10.3389/fmicb.2022.996930] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2022] [Accepted: 09/08/2022] [Indexed: 11/18/2022] Open
Abstract
Coconut oil cake (COC), a byproduct of oil extraction, contains high levels of cellulose. The aim of this study was to isolate a cellulose-degrading yeast from rotten dahlia that can effectively use COC as the only carbon source for cellulase secretion. Based on screening, Meyerozyma guillermondii CBS 2030 (M. guillermondii) was identified as a potential candidate, with the highest cellulolytic activity among the yeast strains isolated, with the carboxymethyl cellulase (CMCase) activity reaching 102.96 U/mL on day 5. The cellulose in COC samples was evaluated before and after degradation by M. guillermondii. Analysis based on field emission scanning electron microscopy (FESEM) revealed that the COC structure was changed significantly during the treatment, indicating effective hydrolysis. Fourier transform infrared spectroscopy (FTIR) of the modified functional groups indicated successful depolymerization of coconut cake. X-ray diffraction (XRD) and analysis of color differences established effective degradation of COC by M. guillermondii. The results demonstrate that M. guillermondii effectively secretes CMCase and degrades cellulose, which has important practical significance in COC degradation.
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Affiliation(s)
| | | | | | | | | | | | - Xin-peng Bai
- Engineering Research Center of Utilization of Tropical Polysaccharide Resources, Ministry of Education, Hainan University, Haikou, China
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26
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Kinetic Model for Enzymatic Hydrolysis of Cellulose from Pre-Treated Rice Husks. FERMENTATION 2022. [DOI: 10.3390/fermentation8090417] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Rice husks contain cellulose as a raw material for manufacturing second-generation bioethanol. Cellulose from pre-treated rice husks was converted into reducing sugars through enzymatic hydrolysis using enzymes derived from Aspergillus niger. This study aims to determine the kinetics of enzymatic hydrolysis at enzyme concentrations of 10, 15, and 20% (v/w) and hydrolysis times of 5, 10, 15, 20, and 25 h. The results showed that cellulose was hydrolyzed to form reducing sugars. The CMCase activity and FPase activity reached 548.940 and 314.892 U mL−1, respectively, much higher than most previous reports on this genus. From the calculation of the reaction rate using the Michaelis–Menten kinetic model, the value of the Michaelis constant ranges from 0.001 to 0.0007, and the maximum rate is 1.3 × 10−7 to 2.7 × 10−7 Mol L−1 s−1. The highest reducing sugar concentration was obtained (1.80 g L−1) at an enzyme concentration of 20% (v/w) and a hydrolysis time of 25 h.
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Seddouk L, Jamai L, Tazi K, Ettayebi M, Alaoui-Mhamdi M, Aleya L, Janati-Idrissi A. Isolation and characterization of a mesophilic cellulolytic endophyte Preussia africana from Juniperus oxycedrus. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:45589-45600. [PMID: 35146609 DOI: 10.1007/s11356-022-19151-9] [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: 10/18/2021] [Accepted: 02/06/2022] [Indexed: 06/14/2023]
Abstract
The medicinal plant Juniperus oxycedrus is less recognized for the diversity of its fungal endophytes and their potential to produce extracellular enzymes. The present study is the first report on the isolation and identification of a mesophilic endophytic strain JO-A, Preussia africana, from fresh stems of the J. oxycedrus endemic tree in the Ifrane region-Morocco, and the evaluation of its ability to produce cellulases. A one-time multi-parameter one-factor screening was optimized to select factors that enhance cellulase production in P. africana. The maximum production of both CMCase and FPase activities were 1.913 IU.mL-1 and 0.885 IU.mL-1, respectively, when the medium was supplemented with 2% w/v glucose. These remarkable titers were tenfold greater than those obtained under the initial non-optimized conditions. This mesophilic P. africana JO-A strain grows and actively produces cellulases at 37 °C demonstrating its great potential for various biotechnology applications. The cellulolytic extract showed the highest enzymatic activities at pH 5.0 and 50 °C with a half-life of 24 h at 50 °C.
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Affiliation(s)
- Loubna Seddouk
- Laboratory of Biotechnology, Conservation and Valorization of Natural Resources, Faculty of Sciences DM, Sidi Mohammed Ben Abdellah University, P.O. Box 1796 Atlas, Fez, Morocco
| | - Latifa Jamai
- Laboratory of Biotechnology, Conservation and Valorization of Natural Resources, Faculty of Sciences DM, Sidi Mohammed Ben Abdellah University, P.O. Box 1796 Atlas, Fez, Morocco
| | - Karima Tazi
- Laboratory of Biotechnology, Conservation and Valorization of Natural Resources, Faculty of Sciences DM, Sidi Mohammed Ben Abdellah University, P.O. Box 1796 Atlas, Fez, Morocco
| | - Mohamed Ettayebi
- The Institute for Infectious Disease Research, McMaster University, 1280 Main Street West, Hamilton, ON, Canada
| | - Mohammed Alaoui-Mhamdi
- Laboratory of Biotechnology, Conservation and Valorization of Natural Resources, Faculty of Sciences DM, Sidi Mohammed Ben Abdellah University, P.O. Box 1796 Atlas, Fez, Morocco.
| | - Lotfi Aleya
- CNRS 6249-Université de Franche-Comté, 16, route de Gray F-25030, Besançon cedex, France
| | - Abellatif Janati-Idrissi
- Laboratory of Biotechnology, Conservation and Valorization of Natural Resources, Faculty of Sciences DM, Sidi Mohammed Ben Abdellah University, P.O. Box 1796 Atlas, Fez, Morocco
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Response-Surface Statistical Optimization of Submerged Fermentation for Pectinase and Cellulase Production by Mucor circinelloides and M. hiemalis. FERMENTATION 2022. [DOI: 10.3390/fermentation8050205] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Cellulase and pectinase are degrading cellulosic and pectic substances that form plant cell walls and, thereby, they have a wide range of applications in the agro-industrial by-products recycling and food industries. In the current research, Mucor circinelloides and M. hiemalis strains were tested for their ability to produce cellulase and pectinase from tangerine peel by submerged fermentation. Experiments on five variables: temperature, pH, incubation period, inoculum size, and substrate concentration, were designed with a Box–Behnken design, as well as response surface methodology (RSM), and analysis of variance was performed. In addition, cellulase and pectinase were partially purified and characterized. At their optimum parameters, M. circinelloides and M. hiemalis afforded high cellulase production (37.20 U/mL and 33.82 U/mL, respectively) and pectinase (38.02 U/mL and 39.76 U/mL, respectively). The partial purification of M. circinelloides and M. hiemalis cellulase produced 1.73- and 2.03-fold purification with 31.12 and 32.02% recovery, respectively; meanwhile, 1.74- and 1.99-fold purification with 31.26 and 31.51% recovery, respectively, were obtained for pectinase. Partially purified cellulase and pectinase from M. circinelloides and M. hiemalis demonstrated the highest activity at neutral pH, and 70 and 50 °C, for cellulase and 50 and 60 °C, for pectinase, respectively. Moreover, 10 mM of K+ increased M. circinelloides enzymatic activity. The production of cellulase and pectinase from M. circinelloides and M. hiemalis utilizing RSM is deemed profitable for the decomposition of agro-industrial wastes.
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Application of Enzyme-Assisted Extraction for the Recovery of Natural Bioactive Compounds for Nutraceutical and Pharmaceutical Applications. APPLIED SCIENCES-BASEL 2022. [DOI: 10.3390/app12073232] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Enzyme-assisted extraction (EAE) involves the use of hydrolytic enzymes for the degradation of the cell wall or other cell components. This supports the diffusion of the solvent into the plant or fungal material, leading to easier elution of its metabolites. This technique has been gaining increasing attention, as it is considered an eco-friendly and cost-effective improvement on classical or modern extraction methods. Its promising application in improving the recovery of different classes of bioactive metabolites (e.g., polyphenols, carotenoids, polysaccharides, proteins, components of essential oil, and terpenes) has been reported by many scientific papers. This review summarises information on the theoretical aspects of EAE (e.g., the components of the cell walls and the types of enzymes used) and the most recent discoveries in the effective involvement of enzyme-assisted extraction of natural products (plants, mushrooms, and animals) for nutraceutical and pharmaceutical applications.
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30
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Biochemical Characterization of Thermostable Carboxymethyl Cellulase and β-Glucosidase from Aspergillus fumigatus JCM 10253. Appl Biochem Biotechnol 2022; 194:2503-2527. [PMID: 35138555 DOI: 10.1007/s12010-022-03839-2] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/28/2022] [Indexed: 11/02/2022]
Abstract
Second-generation biofuel production has emerged as a prominent sustainable and alternative energy. The biochemical properties of cellulolytic enzymes are imperative for cellulosic biomass conversion into fermentable sugars. In the present study, thermostable CMCase and β-glucosidase were purified and characterized from Aspergillus fumigatus JCM 10253. The enzymes were purified through 80% ammonium sulfate precipitation, followed by dialysis and DEAE-cellulose ion-exchange chromatography. The molecular masses of the purified CMCase and β-glucosidase were estimated to be 125 kDa and 90 kDa, respectively. The CMCase and β-glucosidase demonstrated optimum activities at pH 6.0 and 5.0, respectively. Their respective maximum temperatures were 50 and 60 °C. The cellulase activities were stimulated by 10 mM concentration of Ca2+, Ni2+, Fe2+, Mg2+, Cu2+, Mn2+, Zn2+, and Pb2+ ions. The CMCase activity was enhanced by surfactant Triton X-100 but marginally influenced by most inhibitors. The β-glucosidase retained its activity in the presence of organic solvents (30%) isoamyl alcohol, heptane, toluene, and ethyl acetate, while CMCase was retained with acetone during a prolonged incubation of 168 h. The Km and Vmax values of the two cellulases were studied. The properties of high thermostability and good tolerance against organic solvents could signify its potential use in biofuel production and other value-added products.
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Goswami K, Deka Boruah HP, Saikia R. Purification and characterization of cellulase produced by
Novosphingobium
sp. Cm1 and its waste hydrolysis efficiency and bio‐stoning potential. J Appl Microbiol 2022; 132:3618-3628. [DOI: 10.1111/jam.15475] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2021] [Revised: 01/29/2022] [Accepted: 02/02/2022] [Indexed: 11/30/2022]
Affiliation(s)
- Kongkana Goswami
- CSIR‐North East Institute of Science and Technology Jorhat‐785006 Assam India
- Academy of Scientific and Innovative Research (AcSIR) Ghaziabad‐201002 India
| | | | - Ratul Saikia
- CSIR‐North East Institute of Science and Technology Jorhat‐785006 Assam India
- Academy of Scientific and Innovative Research (AcSIR) Ghaziabad‐201002 India
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32
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Characterization of Cellulase from Geotrichum candidum Strain Gad1 Approaching Bioethanol Production. ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING 2022. [DOI: 10.1007/s13369-021-06391-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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Singh SV, Singh R, Singh A, Thangalakshmi S, Kaur B, Kamble MG, Tarafdar A, Upadhyay A. Optimization of enzymatic hydrolysis parameters for sapodilla fruit (
Manikara achras
L.) juice extraction. J FOOD PROCESS PRES 2022. [DOI: 10.1111/jfpp.16315] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Sukh Veer Singh
- Department of Food Science and Technology National Institute of Food Technology Entrepreneurship and Management Kundli India
| | - Rakhi Singh
- Department of Food Science and Technology National Institute of Food Technology Entrepreneurship and Management Kundli India
| | - Anurag Singh
- Department of Food Science and Technology National Institute of Food Technology Entrepreneurship and Management Kundli India
| | - S. Thangalakshmi
- Department of Food Engineering National Institute of Food Technology Entrepreneurship and Management Kundli India
| | - Barjindar P. Kaur
- Department of Food Engineering National Institute of Food Technology Entrepreneurship and Management Kundli India
| | - Meenatai G. Kamble
- Department of Food Science and Technology National Institute of Food Technology Entrepreneurship and Management Kundli India
| | - Ayon Tarafdar
- Livestock Production and Management Section ICAR‐Indian Veterinary Research Institute Bareilly India
| | - Ashutosh Upadhyay
- Department of Food Science and Technology National Institute of Food Technology Entrepreneurship and Management Kundli India
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Devi A, Bajar S, Kour H, Kothari R, Pant D, Singh A. Lignocellulosic Biomass Valorization for Bioethanol Production: a Circular Bioeconomy Approach. BIOENERGY RESEARCH 2022; 15:1820-1841. [PMID: 35154558 PMCID: PMC8819208 DOI: 10.1007/s12155-022-10401-9] [Citation(s) in RCA: 33] [Impact Index Per Article: 16.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/04/2021] [Accepted: 01/24/2022] [Indexed: 05/12/2023]
Abstract
Lignocellulosic biomass generated from different sectors (agriculture, forestry, industrial) act as biorefinery precursor for production of second-generation (2G) bioethanol and other biochemicals. The integration of various conversion techniques on a single platform under biorefinery approach for production of biofuel and industrially important chemicals from LCB is gaining interest worldwide. The waste generated on utilization of bio-resources is almost negligible or zero in a biorefinery along with reduced greenhouse gas emissions, which supports the circular bioeconomy concept. The economic viability of a lignocellulosic biorefinery depends upon the efficient utilization of three major components of LCB-cellulose, hemicellulose and lignin. The heterogeneous structure and recalcitrant nature of LCB is main obstacle in its valorization into bioethanol and other value-added products. The success of bioconversion process depends upon methods used during pre-treatment, hydrolysis and fermentation processes. The cost involved in each step of the bioconversion process affects the viability of cellulosic ethanol. The lignocellulose biorefinery has ample scope, but much-focused research is required to fully utilize major parts of lignocellulosic biomass with zero wastage. The present review entails lignocellulosic biomass valorization for ethanol production, along with different steps involved in its production. Various value-added products produced from LCB components were also discussed. Recent technological advances and significant challenges in bioethanol production are also highlighted in addition to future perspectives.
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Affiliation(s)
- Arti Devi
- Department of Environmental Sciences, Central University of Jammu, Jammu, 181143 Jammu and Kashmir India
| | - Somvir Bajar
- Department of Environmental Science and Engineering, J.C. Bose University of Science and Technology, YMCA, Faridabad, 121006 Haryana India
| | - Havleen Kour
- Department of Environmental Sciences, Central University of Jammu, Jammu, 181143 Jammu and Kashmir India
| | - Richa Kothari
- Department of Environmental Sciences, Central University of Jammu, Jammu, 181143 Jammu and Kashmir India
| | - Deepak Pant
- Separation and Conversion Technology, Flemish Institute for Technological Research (VITO), Boeretang 200, 2400 Mol, Belgium
| | - Anita Singh
- Department of Environmental Sciences, Central University of Jammu, Jammu, 181143 Jammu and Kashmir India
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Yu P, Du J, Cao C, Cai G, Sun J, Wu D, Lu J. Development of a novel multi-strain wheat Qu with high enzyme activities for Huangjiu fermentation. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2021; 101:4808-4817. [PMID: 33502765 DOI: 10.1002/jsfa.11127] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/27/2020] [Revised: 01/17/2021] [Accepted: 01/27/2021] [Indexed: 06/12/2023]
Abstract
BACKGROUND Wheat Qu has long been used as a fermentation starter to produce Huangjiu. Wheat Qu quality depends on its microbial community structure and the hydrolytic enzymes generated by the micro-organisms. RESULTS Strain YF1 and YF2 were successfully screened as they exhibited high acidic protease (231.9 ± 1.4 U g-1 ) and cellulase (7.1 ± 0.6 U g-1 ) activities. Based on a morphological and sequence analysis of the internal transcribed spacer (ITS) gene, YF1 and YF2 were identified as Rhizopus oryzae and Aspergillus niger, respectively. Cooked wheat Qu was produced using mixed fungal starter fermentations with Aspergillus oryzae SU-16, YF1, and YF2. For Qu-making, the optimized conditions for fermentation time, water content, and inoculum size were 47.8 h, 69.4%, and 6.1%, respectively. Under these conditions, compared with single-strain cooked wheat Qu, enzyme activities of amylase, acidic protease, and cellulase increased by 27.4%, 657.1%, and 1276.2%, respectively. Short peptides and free amino acids contents increased by 19.6% and 131.8%, respectively. This wheat Qu was used for Huangjiu brewing, and the alcohol content increased by approximately 14.6% because of the increased starch hydrolysis efficiency mainly attributed to its high enzyme activity. CONCLUSION Using mixed fungal strains as starter cultures may be an efficient strategy to improve wheat Qu quality, with great potential for application in industrial Huangjiu production. © 2021 Society of Chemical Industry.
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Affiliation(s)
- Peibin Yu
- National Engineering Laboratory for Cereal Fermentation Technology (NELCF), Jiangnan University, Wuxi, P. R. China
- Jiangsu Provincial Research Center for Bioactive Product Processing Technology, Jiangnan University, Wuxi, P. R. China
| | - Jing Du
- Department of Technologies, Jiangsu Yiming Biological Co., Ltd, Taizhou, P. R. China
| | - Chunlei Cao
- National Engineering Laboratory for Cereal Fermentation Technology (NELCF), Jiangnan University, Wuxi, P. R. China
- Jiangsu Provincial Research Center for Bioactive Product Processing Technology, Jiangnan University, Wuxi, P. R. China
| | - Guolin Cai
- National Engineering Laboratory for Cereal Fermentation Technology (NELCF), Jiangnan University, Wuxi, P. R. China
| | - Junyong Sun
- National Engineering Laboratory for Cereal Fermentation Technology (NELCF), Jiangnan University, Wuxi, P. R. China
| | - Dianhui Wu
- National Engineering Laboratory for Cereal Fermentation Technology (NELCF), Jiangnan University, Wuxi, P. R. China
- Jiangsu Provincial Research Center for Bioactive Product Processing Technology, Jiangnan University, Wuxi, P. R. China
| | - Jian Lu
- National Engineering Laboratory for Cereal Fermentation Technology (NELCF), Jiangnan University, Wuxi, P. R. China
- Jiangsu Provincial Research Center for Bioactive Product Processing Technology, Jiangnan University, Wuxi, P. R. China
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Bellaouchi R, Abouloifa H, Rokni Y, Hasnaoui A, Ghabbour N, Hakkou A, Bechchari A, Asehraou A. Characterization and optimization of extracellular enzymes production by Aspergillus niger strains isolated from date by-products. J Genet Eng Biotechnol 2021; 19:50. [PMID: 33788044 PMCID: PMC8012474 DOI: 10.1186/s43141-021-00145-y] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2020] [Accepted: 03/12/2021] [Indexed: 11/10/2022]
Abstract
BACKGROUND This work aims to study the optimal conditions of the fermentation culture medium used for the production of extracellular enzymes (amylase, cellulase, lipase, and protease) from previously isolated Aspergillus niger strains in date by-products. RESULTS The five most powerful isolates selected based on the zone of degradation formed on Petri plates by the substrate were subjected to the quantitative evaluation of their enzymatic production. All five strains showed almost similar API-ZYM profiles, with minor variations observed at the level of some specific enzyme expression. The production of cellulase and amylase was depending on pH and incubation temperatures. ASP2 strain demonstrated the high production rate of amylase (at pH 5 and 30 °C) and cellulase (at pH 6 and 30 °C) for 96 h of incubation. CONCLUSION The A. niger showed the ability to produce several extracellular enzymes and can be used in the valorization of different agroindustrial residues.
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Affiliation(s)
- Reda Bellaouchi
- Laboratory of Bioresources, Biotechnology, Ethnopharmacology and Health, Faculty of Sciences, Mohammed Premier University, 60 000, Oujda, Morocco.
| | - Houssam Abouloifa
- Laboratory of Bioresources, Biotechnology, Ethnopharmacology and Health, Faculty of Sciences, Mohammed Premier University, 60 000, Oujda, Morocco
| | - Yahya Rokni
- Laboratory of Bioresources, Biotechnology, Ethnopharmacology and Health, Faculty of Sciences, Mohammed Premier University, 60 000, Oujda, Morocco
| | - Amina Hasnaoui
- Laboratory of Bioresources, Biotechnology, Ethnopharmacology and Health, Faculty of Sciences, Mohammed Premier University, 60 000, Oujda, Morocco
| | - Nabil Ghabbour
- Laboratory of Bioresources, Biotechnology, Ethnopharmacology and Health, Faculty of Sciences, Mohammed Premier University, 60 000, Oujda, Morocco
| | - Abdelkader Hakkou
- Laboratory of Bioresources, Biotechnology, Ethnopharmacology and Health, Faculty of Sciences, Mohammed Premier University, 60 000, Oujda, Morocco
| | - Abdelmajid Bechchari
- National Institute of Agronomic Research (INRA), Oujda Center, 60 000, Oujda, Morocco
| | - Abdeslam Asehraou
- Laboratory of Bioresources, Biotechnology, Ethnopharmacology and Health, Faculty of Sciences, Mohammed Premier University, 60 000, Oujda, Morocco
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