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Bangoria P, Patel A, Shah AR. Characterization of a fungal α-galactosidase and its synergistic effect with β-mannanase for hydrolysis of galactomannan. Carbohydr Res 2023; 531:108893. [PMID: 37429228 DOI: 10.1016/j.carres.2023.108893] [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: 01/22/2023] [Revised: 04/16/2023] [Accepted: 06/30/2023] [Indexed: 07/12/2023]
Abstract
An acid stable α-galactosidase was produced and purified from mannolytic fungal strain, Penicillium aculeatum APS1. Enzyme was produced using wheat bran and copra cake moistened with corn steep liquor by solid state fermentation. APS1αgal having molecular weight of 65.4 kDa was purified to electrophoretic homogeneity by three phase partitioning and gel permeation chromatography with high enzyme recovery. APS1αgal was found to be maximally active at 55 °C and pH 4.5, having high stability at acidic pH. Thermal stability and thermal inactivation kinetics of APS1αgal were also studied. APS1αgal was found to effectively hydrolyse oligosaccharides as well as polysaccharides having α-1,6 linked galactose. Abolishment of enzyme activity in N-brommosuccinimide revealed an important role of tryptophan residue in catalysis. APS1αgal had shown outstanding tolerance to NaCl and proteases. MALDI-TOF MS/MS analysis indicated that enzyme is probably a member of family GH27. Synergistic interaction between APS1αgal and β-mannanase for hydrolysis of galactomannan was very clear and maximum 2.0° of synergy was found under simultaneous mode of action. This study reports a new source of α-galactosidase with biochemical properties suitable for applications in food and feed industries.
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Affiliation(s)
- Purvi Bangoria
- Post Graduate Department of Biosciences, Satellite Campus, Bakrol, Sardar Patel University, Vallabh Vidhyanagar, 388315, Gujarat, India.
| | - Amisha Patel
- Post Graduate Department of Biosciences, Satellite Campus, Bakrol, Sardar Patel University, Vallabh Vidhyanagar, 388315, Gujarat, India.
| | - Amita R Shah
- Post Graduate Department of Biosciences, Satellite Campus, Bakrol, Sardar Patel University, Vallabh Vidhyanagar, 388315, Gujarat, India.
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2
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Chaudhari HG, Prajapati S, Wardah ZH, Raol G, Prajapati V, Patel R, Shati AA, Alfaifi MY, Elbehairi SEI, Sayyed RZ. Decoding the microbial universe with metagenomics: a brief insight. Front Genet 2023; 14:1119740. [PMID: 37197021 PMCID: PMC10183756 DOI: 10.3389/fgene.2023.1119740] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2022] [Accepted: 04/14/2023] [Indexed: 05/19/2023] Open
Abstract
A major part of any biological system on earth involves microorganisms, of which the majority are yet to be cultured. The conventional methods of culturing microbes have given fruitful outcomes yet have limitations. The curiosity for better understanding has led to the development of culture-independent molecular methods that help push aside the roadblocks of earlier methods. Metagenomics unifies the scientific community in search of a better understanding of the functioning of the ecosystem and its component organisms. This approach has opened a new paradigm in advanced research. It has brought to light the vast diversity and novelty among microbial communities and their genomes. This review focuses on the development of this field over time, the techniques and analysis of data generated through sequencing platforms, and its prominent interpretation and representation.
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Affiliation(s)
- Hiral G. Chaudhari
- Shri Alpesh N. Patel PG Institute of Science and Research, Sardar Patel University, Anand, Gujarat, India
| | - Shobha Prajapati
- Department of Biosciences, Veer Narmad South Gujarat University, Surat, Gujarat, India
| | - Zuhour Hussein Wardah
- Shri Alpesh N. Patel PG Institute of Science and Research, Sardar Patel University, Anand, Gujarat, India
| | - Gopal Raol
- Shri R. P. Arts, Shri K.B. Commerce, and Smt. BCJ Science College, Khambhat, Gujarat, India
| | - Vimalkumar Prajapati
- Division of Microbial and Environmental Biotechnology, Aspee Shakilam Biotechnology Institute, Navsari Agricultural University, Surat, Gujarat, India
- *Correspondence: Vimalkumar Prajapati,
| | - Rajesh Patel
- Department of Biosciences, Veer Narmad South Gujarat University, Surat, Gujarat, India
| | - Ali A. Shati
- Biology Department, Faculty of Science, King Khalid University, Abha, Saudi Arabia
| | - Mohammad Y. Alfaifi
- Biology Department, Faculty of Science, King Khalid University, Abha, Saudi Arabia
| | | | - R. Z. Sayyed
- Department of Microbiology, PSGVP Mandal's S I Patil Arts, G B Patel Science and STKV Sangh Commerce College, Shahada, India
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Vidya C, Gnanesh Kumar B, Chinmayee C, Singh SA. Purification, characterization and specificity of a new GH family 35 galactosidase from Aspergillus awamori. Int J Biol Macromol 2020; 156:885-895. [DOI: 10.1016/j.ijbiomac.2020.04.013] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2020] [Revised: 03/10/2020] [Accepted: 04/05/2020] [Indexed: 10/24/2022]
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Huang L, Wang C, Zhang Y, Chen X, Huang Z, Xing G, Dong M. Degradation of anti‐nutritional factors and reduction of immunoreactivity of tempeh by co‐fermentation with
Rhizopus oligosporus
RT
‐3 and
Actinomucor elegans
DCY
‐1. Int J Food Sci Technol 2019. [DOI: 10.1111/ijfs.14085] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Affiliation(s)
- Lu Huang
- College of Food Science and Technology Nanjing Agricultural University Nanjing Jiangsu 210095 China
| | - Chenxi Wang
- College of Food Science and Technology Nanjing Agricultural University Nanjing Jiangsu 210095 China
| | - Yongzhu Zhang
- College of Food Science and Technology Nanjing Agricultural University Nanjing Jiangsu 210095 China
| | - Xiaohong Chen
- College of Food Science and Technology Nanjing Agricultural University Nanjing Jiangsu 210095 China
| | - Zhihai Huang
- College of Food Science and Technology Nanjing Agricultural University Nanjing Jiangsu 210095 China
| | - Guangliang Xing
- College of Food Science and Technology Nanjing Agricultural University Nanjing Jiangsu 210095 China
| | - Mingsheng Dong
- College of Food Science and Technology Nanjing Agricultural University Nanjing Jiangsu 210095 China
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Cultural conditions optimization for production of β-galactosidase from Bacillus licheniformis ATCC 12759 under solid-state fermentation. ACTA ACUST UNITED AC 2018. [DOI: 10.1515/tjb-2017-0153] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
AbstractObjective:The aim of this work was to study the optimal cultivation conditions for β-galactosidase production byBacillus licheniformisATCC 12759.Materials and methods:The screening of β-galactosidase production fromB. licheniformisATCC 12759 was performed by solid state fermentation method on media rich with rice bran (RB). Different factors were tested for the optimization of β-galactosidase production.Results:Certain fermentation parameters involving incubation time, incubation temperature, inoculum level, moisture content, initial pH, agitation speed, size of fermentation medium and optimum temperature of β-galactosidase activity were studied separately. Maximal amount of β-galactosidase production was obtained when solid-state fermentation (SSF) was carried out using RB, having inoculum level 35%, moisture content of 20%, initial pH 7.5 at 37°C for 48 h.Conclusion:Results indicated that optimal fermentation conditions play a key role in the maximum production of β-galactosidase fromB. licheniformisATCC 12759. This study shows the potential of the studied enzymes to be promoting candidates for the degradation of lactose and production of important bioproducts.
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Abdolmaleki F, Mazaheri Assadi M, Akbarirad H. Assessment of beverages made from milk, soya milk and whey using Iranian kefir starter culture. INT J DAIRY TECHNOL 2015. [DOI: 10.1111/1471-0307.12197] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Farzaneh Abdolmaleki
- Department of Food Science and Engineering; Faculty of Industrial and Mechanical Engineering; Qazvin Islamic Azad University; Nokhbegan Blvd. PO Box 34185-1416 Qazvin Iran
| | - Mahnaz Mazaheri Assadi
- Department of Biotechnology; Iranian Research Organization for Science & Technology (IROST); Sh. Ehsani Rad St. Enqelab St., Parsa Sq. Ahmadabad Mostoufi Rd., Azadegan Highway PO Box 3353-5111 Tehran 3353136846 Iran
| | - Hamid Akbarirad
- Department of Food Science and Technology; Islamic Azad University; Mazandaran Science and Research Branch (IROST); Sh. Ehsani Rad St. Enqelab St., Parsa Sq. Ahmadabad Mostoufi Rd., Azadegan Highway PO Box 3353-5111 Tehran 3353136846 Iran
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Wang Y, Liu X, Wang H, Li D, Piao X, Lu W. Optimization of processing conditions for solid-state fermented soybean meal and its effects on growth performance and nutrient digestibility of weanling pigs. Livest Sci 2014. [DOI: 10.1016/j.livsci.2014.07.020] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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8
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High-Yield Production of Alpha-Galactosidase Excreted fromPenicillium ChrysogenumandAspergillus Niger. BIOTECHNOL BIOTEC EQ 2014. [DOI: 10.2478/v10133-010-0015-5] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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9
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Katrolia P, Rajashekhara E, Yan Q, Jiang Z. Biotechnological potential of microbial α-galactosidases. Crit Rev Biotechnol 2013; 34:307-17. [DOI: 10.3109/07388551.2013.794124] [Citation(s) in RCA: 63] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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10
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Abstract
The agro-byproduct culture medium for α-galactosidase production by Aspergillus niger zju-Y1 was optimized with flask-SSF via response surface methodology, maximum α-galactosidase yield at the level of 230.159 U/g dry matter was achieved by using wheat bran and soybean meal as culture medium components. Furthermore, based on the flask-SSF results, the three-section-control strategy was developed for scale-up SSF, making fermentation steadily and efficiently, and the α-galactosidase activity hitting to 174.410 U/g dry matter, which is close to the result of flask-SSF. The results demonstrated that a feasible scale-up SSF mode for α-galactosidase production is successfully set up by combining the utilization of agro-byproduct culture medium and three-section-control strategy.
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Saad RR, Fawzi EM. Purification and characterization of a thermostable α-galactosidase from Thielavia terrestris NRRL 8126 in solid state fermentation. ACTA BIOLOGICA HUNGARICA 2012; 63:138-50. [PMID: 22453806 DOI: 10.1556/abiol.63.2012.1.11] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Several seeds and husks of some plants belonging to leguminosae, Graminae, Compositae and Palmae were evaluated as carbon substrates to produce α-galactosidase (α-Gal) by the thermophilic fungus, Thielavia terrestris NRRL 8126 in solid substrate fermentation. The results showed that Cicer arietinum (chick pea seed) was the best substrate for α-Gal production. The crude enzyme was precipitated by ammonium sulphate (60%) and purified by gel filtration on sephadex G-100 followed by ion exchange chromatography on DEAE-Cellulose. The final purification fold of the enzyme was 30.42. The temperature and pH optima of purified α-Gal from Thielavia terrestris were 70 °C and 6.5, respectively. The enzyme showed high thermal stability at 70 °C and 75 °C and the half-life of the α-Gal at 90 °C was 45 min. Km of the purified enzyme was 1.31 mM. The purified enzyme was inhibited by Ag2+, Hg2+, Zn2+, Ba2+, Mg2+, Mn2+ and Fe2+ at 5 mM and 10 mM. Also, EDTA, sodium arsenate, L-cysteine and iodoacetate inhibited the enzyme activity. On the other hand, Ca2+, Cu2+, K+ and Na+ slightly enhanced the enzyme activity at 5 mM while at 10 mM they caused inhibition. The molecular weight of the α-Gal was estimated to be 82 kDa by sodium dodecyl sulfate-polyacrylamide gel electrophoresis. This enzyme displays a number of biochemical properties that make it a potentially strong candidate for biotechnological and medicinal applications.
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Affiliation(s)
- Rawia R Saad
- Biological & Geological Sciences Department, Faculty of Education Ain Shams University, Heliopolis, Roxy, Cairo Egypt
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12
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Cloning and functional expression of α-galactosidase cDNA from Penicillium janczewskii zaleski. Biologia (Bratisl) 2011. [DOI: 10.2478/s11756-011-0014-5] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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13
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Duarte TR, Oliveira SS, Macrae A, Cedrola SML, Mazotto AM, Souza EP, Melo ACN, Vermelho AB. Increased expression of keratinase and other peptidases by Candida parapsilosis mutants. Braz J Med Biol Res 2011; 44:212-6. [PMID: 21399854 DOI: 10.1590/s0100-879x2011007500011] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2010] [Accepted: 01/10/2010] [Indexed: 11/22/2022] Open
Abstract
Keratinases are enzymes of great importance involved in pathogenic processes of some fungi. They also have a widespread ecological role since they are responsible for the degradation and recycling of keratin. On the one hand, studying them furthers our knowledge of pathogenicity mechanisms, which has important implications for human health, and on the other hand, understanding their ecological role in keratin recycling has biotechnological potential. Here, a wild-type keratinolytic Candida parapsilosis strain isolated from a poultry farm was treated with ethyl methanesulfonate in order to generate mutants with increased keratinase activity. Mutants were then cultured on media with keratin extracted from chicken feathers as the sole source of nitrogen and carbon. Approximately 500 mutants were screened and compared with the described keratinolytic wild type. Three strains, H36, I7 and J5, showed enhanced keratinase activity. The wild-type strain produced 80 U/mL of keratinolytic activity, strain H36 produced 110 U/mL, strain I7, 130 U/mL, and strain J5, 140 U/mL. A 70% increase in enzyme activity was recorded for strain J5. Enzymatic activity was evaluated by zymograms with proteic substrates. A peptidase migrating at 100 kDa was detected with keratin, bovine serum albumin and casein. In addition, a peptidase with a molecular mass of 50 kDa was observed with casein in the wild-type strain and in mutants H36 and J5. Gelatinase activity was detected at 60 kDa. A single band of 35 kDa was found in wild-type C. parapsilosis and in mutants with hemoglobin substrate.
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Affiliation(s)
- T R Duarte
- Laboratório Proteases de Microrganismos, Departamento de Microbiologia Geral, Instituto de Microbiologia Paulo de Góes, Universidade Federal do Rio de Janeiro, RJ, Brasil
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14
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Awan MS, Tabbasam N, Ayub N, Babar ME, Rana SM, Rajoka MI. Gamma radiation induced mutagenesis in Aspergillus niger to enhance its microbial fermentation activity for industrial enzyme production. Mol Biol Rep 2010; 38:1367-74. [PMID: 20632114 DOI: 10.1007/s11033-010-0239-3] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2009] [Accepted: 07/08/2010] [Indexed: 11/25/2022]
Abstract
α- and β-Galactosidases find application in food processing, health and nutrition. Aspergillus niger is one of the potent producer of these enzymes and was genotypically improved using gamma-ray induced mutagenesis. The mutant-derivative produced two-fold higher α- and β-galactosidases. For testing genetic variability and its relationship with phenotypic properties of the two organisms, DNA samples of the mutant and parental strains of A. niger were amplified with 28 deca-nucleotide synthetic primers. RAPD analysis showed significantly different pattern between parental and mutant cultures. The mutant derivative yielded homogeneous while parental strain formed heterogeneous amplification patterns. Seven primers identified 42.9% polymorphism in the amplification products, indicating that these primers determined some genetic variability between the two strains. Thus RAPD was found to be an efficient technique to determine genetic variability in the mutant and wild organisms. Both wild and mutant strains were analyzed for their potential to produce galactosidases. Comparison of different carbon sources on enzyme yield revealed that wheat bran is significant (P < 0.01) effective producer and economical source followed by rice bran, rice polishing and lactose. The mutant was significantly better enzyme producer and could be considered for its prospective application in food, nutrition and health and that RAPD can be effectively used to differentiate mutant strain from the parental strain based on the RAPD patterns.
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Affiliation(s)
- M Siddique Awan
- Department of Food Technology, Faculty of Agriculture, University of Azad Jammu & Kashmir Rawalakot, Rawalakot, Pakistan
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15
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Shafique S, Bajwa R, Shafique S. Condition stabilization for Aspergillus niger FCBP-198 and its hyperactive mutants to yield high titres of α-amylase. Microbiology (Reading) 2010. [DOI: 10.1134/s0026261710030021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
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16
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Characterization of a β-xylosidase produced by a mutant derivative of Humicola lanuginosa in solid state fermentation. ANN MICROBIOL 2010. [DOI: 10.1007/s13213-010-0026-3] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
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17
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SONG DANFENG, CHANG SAMK, IBRAHIM SALAMA. EFFECT OF FERMENTATION SUBSTRATES ON ENZYME PRODUCTION AND DEGRADATION OF OLIGOSACCHARIDES IN PINTO BEAN FLOUR AS AFFECTED BY PARTICLE SIZE. J FOOD PROCESS PRES 2009. [DOI: 10.1111/j.1745-4549.2008.00304.x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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18
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Rajoka MI, Awan MS, Saleem M, Ayub N. Solid-state fermentation-supported enhanced production of α-galactosidase by a deoxyglucose-resistant mutant of Aspergillus niger and thermostabilization of the production process. World J Microbiol Biotechnol 2008. [DOI: 10.1007/s11274-008-9886-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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19
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Falkoski DL, Guimarães VM, de Queiroz MV, de Araújo EF, de Almeida MN, de Barros EG, de Rezende ST. Covalent Immobilization of α-Galactosidase from Penicillium griseoroseum and its Application in Oligosaccharides Hydrolysis. Appl Biochem Biotechnol 2008; 158:540-51. [DOI: 10.1007/s12010-008-8387-9] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2008] [Accepted: 09/29/2008] [Indexed: 11/30/2022]
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20
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Investigation on α-Galactosidase Production by Streptomyces griseoloalbus in a Forcefully Aerated Packed-Bed Bioreactor Operating in Solid-State Fermentation Condition. Appl Biochem Biotechnol 2008; 160:421-7. [DOI: 10.1007/s12010-008-8345-6] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2008] [Accepted: 08/13/2008] [Indexed: 10/21/2022]
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21
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Cai CG, Lou BG, Zheng XD. Keratinase production and keratin degradation by a mutant strain of Bacillus subtilis. J Zhejiang Univ Sci B 2008; 9:60-7. [PMID: 18196614 DOI: 10.1631/jzus.b061620] [Citation(s) in RCA: 66] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
A new feather-degrading bacterium was isolated from a local feather waste site and identified as Bacillus subtilis based on morphological, physiochemical, and phylogenetic characteristics. Screening for mutants with elevated keratinolytic activity using N-methyl-N'-nitro-N-nitrosoguanidine mutagenesis resulted in a mutant strain KD-N2 producing keratinolytic activity about 2.5 times that of the wild-type strain. The mutant strain produced inducible keratinase in different substrates of feathers, hair, wool and silk under submerged cultivation. Scanning electron microscopy studies showed the degradation of feathers, hair and silk by the keratinase. The optimal conditions for keratinase production include initial pH of 7.5, inoculum size of 2% (v/v), age of inoculum of 16 h, and cultivation at 23 degrees C. The maximum keratinolytic activity of KD-N2 was achieved after 30 h. Essential amino acids like threonine, valine, methionine as well as ammonia were produced when feathers were used as substrates. Strain KD-N2, therefore, shows great promise of finding potential applications in keratin hydrolysis and keratinase production.
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Affiliation(s)
- Cheng-gang Cai
- College of Food Science and Biosystem Engineering, Zhejiang University, Hangzhou 310029, China
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22
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Liu CQ, Chen QH, Tang B, Ruan H, He GQ. Response surface methodology for optimizing the fermentation medium of alpha-galactosidase in solid-state fermentation. Lett Appl Microbiol 2007; 45:206-12. [PMID: 17651220 DOI: 10.1111/j.1472-765x.2007.02173.x] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
AIMS Alpha-galactosidase is applied in food and feed industries for hydrolysing raffinose series oligosaccharides (RO) that are the factors primarily responsible for flatulence upon ingestion of soybean-derived products. The objective of the current work was to develop an optimal culture medium for the production of alpha-galactosidase in solid-state fermentation (SSF) by a mutant strain Aspergillus foetidus. METHODS AND RESULTS Response surface methodology (RSM) was applied to evaluate the effects of variables, namely the concentrations of wheat bran, soybean meal, KH(2)PO(4), MnSO(4).H(2)O and CuSO(4).5H(2)O on alpha-galactosidase production in the solid substrate. A fractional factorial design (FFD) was firstly used to isolate the main factors that affected the production of alpha-galactosidase and the central composite experimental design (CCD) was then adopted to derive a statistical model for optimizing the composition of the fermentation medium. The experimental results showed that the optimum fermentation medium for alpha-galactosidase production by Aspergillus foetidus ZU-G1 was composed of 8.2137 g wheat bran, 1.7843 g soybean meal, 0.001 g MnSO(4).H(2)O and 0.001 g CuSO(4).5H(2)O in 10 g dry matter fermentation medium. CONCLUSIONS After incubating 96 h in the optimum fermentation medium, alpha-galactosidase activity was predicted to be 2210.76 U g(-1) dry matter in 250 ml shake flask. In the present study, alpha-galactosidase activity reached 2207.19 U g(-1) dry matter. SIGNIFICANCE AND IMPACT OF THE STUDY Optimization of the solid substrate was a very important measure to increase enzyme activity and realize industrial production of alpha-galactosidase. The process of alpha-galactosidase production in laboratory scale may have the potential to scale-up.
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Affiliation(s)
- C Q Liu
- Department of Food Science and Nutrition, Zhejiang University, Hangzhou 310029, China
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Liu CQ, Chen QH, Cheng QJ, Wang JL, He GQ. Effect of cultivating conditions on alpha-galactosidase production by a novel Aspergillus foetidus ZU-G1 strain in solid-state fermentation. J Zhejiang Univ Sci B 2007; 8:371-6. [PMID: 17542067 PMCID: PMC1859882 DOI: 10.1631/jzus.2007.b0371] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
The work is intended to achieve optimum culture conditions of alpha-galactosidase production by a mutant strain Aspergillus foetidus ZU-G1 in solid-state fermentation (SSF). Certain fermentation parameters involving moisture content, incubation temperature, cultivation period of seed, inoculum volume, initial pH value, layers of pledget, load size of medium and period of cultivation were investigated separately. The optimal cultivating conditions of alpha-galactosidase production in SSF were 60% initial moisture of medium, 28 degrees C incubation temperature, 18 h cultivation period of seed, 10% inoculum volume, 5.0 approximately 6.0 initial pH of medium, 6 layers of pledget and 10 g dry matter loadage. Under the optimized cultivation conditions, the maximum alpha-galactosidase production was 2 037.51 U/g dry matter near the 144th hour of fermentation.
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Liu C, Ruan H, Shen H, Chen Q, Zhou B, Li Y, He G. Optimization of the fermentation medium for alpha-galactosidase production from Aspergillus foetidus ZU-G1 using response surface methodology. J Food Sci 2007; 72:M120-5. [PMID: 17995779 DOI: 10.1111/j.1750-3841.2007.00328.x] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The optimization of fermentation medium for alpha-galactosidase production by Aspergillus foetidus ZU-G1 was investigated in shaker flask fermentation. A one-factor-at-a-time experiment was used to screen the preferable nutriment (carbon sources, nitrogen sources, and essential elements) for alpha-galactosidase production. A fractional factorial design was used to screen the main 5 factors, soybean meal, wheat bran, KH2PO4, FeSO4 x 7 H2O, and the medium initial pH, that affected the production of alpha-galactosidase. The central composite experimental design was further adopted to derive a statistical model for optimizing the composition of the fermentation medium. The experimental results showed that the optimum fermentation medium for alpha-galactosidase production by Aspergillus foetidus ZU-G1 was composed of 3.2% soybean meal (w/v), 2% wheat bran (w/v), 0.1% KH2PO4 (w/v), and 0.05% FeSO4 x 7 H2O (w/v); initial medium pH was 6.31. The results further predicted that alpha-galactosidase activity reached 64.75 U/mL after 96-h incubation in this medium, which was approximately 7 times higher than that incubated in the nonoptimized medium. The time course of alpha-galactosidase production in the optimized medium composition was also carried out to validate the model.
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Affiliation(s)
- Caiquin Liu
- Dept. of Food Science and Nutrition, Zhejiang Univ., Hangzhou, 310029, China
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