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Rehman A, Saeed A, Asad W, Khan I, Hayat A, Rehman MU, Shah TA, Sitotaw B, Dawoud TM, Bourhia M. Eco-friendly textile desizing with indigenously produced amylase from Bacillus cereus AS2. Sci Rep 2023; 13:11991. [PMID: 37491583 PMCID: PMC10368615 DOI: 10.1038/s41598-023-38956-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2023] [Accepted: 07/18/2023] [Indexed: 07/27/2023] Open
Abstract
Starch is added to the fabric surface to secure weaving process. During finishing these sized particles are removed from the fabric and prepared it for printing and dyeing. Chemicals de-sizing agents damage fabric surfaces and reduce the quality of the product. An alternative to these conventional desizing agents is the use of biological molecules i.e. enzymes. The current study compares traditional de-sizing to bio-based de-sizing methods, as well as the optimization of fabric desizing settings using crude amylase. Amylase-producing Bacillus cereus AS2 was isolated from indigenous soil samples. The maximal fermentative de-sizing capability was discovered at 72 h, with no fabric surface degradation. Chemical desizing showed that the fabric lost all sizing agents to TEGEWA scale 9 within 1 h in presence of 5N HCl. Optimal studies for desizing showed that 1000 IU/ml of amylase resulted in maximum de-sizing within 15 h at 60 °C and 0.5% Triton-X. Water absorbance and weight loss, both parameters were used to check the desizing efficacy and it was found that de-sizing to same scale was occurred in the case of enzyme as well as commercially desized fabric. Enzyme desized cloth was found to be free of any starch particles in SEM micrographs, identical to industrially de-sized fabric, ensuring bioprocess efficacy.
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Affiliation(s)
- Aneela Rehman
- Department of Microbiology, Abbottabad University of Science & Technology, Havelian, 22010, Pakistan
| | - Asma Saeed
- Department of Microbiology, University of Karachi, Karachi, Pakistan.
| | - Wajeeha Asad
- Department of Microbiology, University of Karachi, Karachi, Pakistan
| | - Ibrar Khan
- Department of Microbiology, Abbottabad University of Science & Technology, Havelian, 22010, Pakistan
| | - Azam Hayat
- Department of Microbiology, Abbottabad University of Science & Technology, Havelian, 22010, Pakistan
| | - Mujaddad Ur Rehman
- Department of Microbiology, Abbottabad University of Science & Technology, Havelian, 22010, Pakistan
| | - Tawaf Ali Shah
- Shandong Research Centre of Engineering and Technology for Clean Energy, Shandong University of Technology, Zibo, China
| | - Baye Sitotaw
- Department of Biology, Bahir Dar University, P.O. Box 79, Bahir Dar, Ethiopia.
| | - Turki M Dawoud
- Department of Botany and Microbiology, College of Science, King Saud University, P.O. Box 2455, Riyadh, 11451, Saudi Arabia
| | - Mohammed Bourhia
- Department of Chemistry and Biochemistry, Faculty of Medicine and Pharmacy, Ibn Zohr University, 70000, Laayoune, Morocco
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2
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Khowdiary MM, Taha NA, Saleh NM, Elhenawy AA. Synthesis of Novel Nano-Sulfonamide Metal-Based Corrosion Inhibitor Surfactants. MATERIALS 2022; 15:ma15031146. [PMID: 35161090 PMCID: PMC8838271 DOI: 10.3390/ma15031146] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/19/2021] [Revised: 01/13/2022] [Accepted: 01/25/2022] [Indexed: 02/04/2023]
Abstract
The synthesis of novel corrosion inhibitors and biocide metal complex nanoparticle surfactants was achieved through the reaction of sulfonamide with selenious acid to produce a quaternary ammonium salt. Platinum and cobalt surfactants were then formed by complexing the first products with platinum (II) or cobalt (II) ions. The surface properties of these surfactants were then investigated, and the free energy of form micelles (ΔGomic) and adsorption (ΔGoads) was determined. The obtained cationic compounds were evaluated as corrosion inhibitors for carbon steel dissolution in 1N HCl medium. The results of gravimetric and electrochemical measurements showed that the obtained inhibitors were excellent corrosion inhibitors. The anti-sulfate-reducing bacteria activity known to cause corrosion of oil pipes was obtained by the inhibition zone diameter method for the prepared compounds, which were measured against sulfate-reducing bacteria. FTIR spectra, elemental analysis, H1 NMR spectrum, and 13C labeling were performed to ensure the purity of the prepared compounds.
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Affiliation(s)
- Manal M. Khowdiary
- Chemistry Department, Faculty of Applied Science, Umm Al-Qura University Branch El Lieth, Makkah al-Mukarramah 24382, Saudi Arabia
- Applied Surfactant Laboratory, Egyptian Petroleum Research Institute, Cairo 11727, Egypt
- Correspondence: (M.M.K.); (N.A.T.); Tel.: +966-583-307-941 (M.M.K.); +20-100-528-9679 (N.A.T.)
| | - Nahla A. Taha
- Modeling and Simulation Research Department, Advanced Technology and New Materials Research Institute, City of Scientific Research and Technological Applications (SRTA-CITY), New Borg El-Arab City 21934, Egypt
- Correspondence: (M.M.K.); (N.A.T.); Tel.: +966-583-307-941 (M.M.K.); +20-100-528-9679 (N.A.T.)
| | - Nashwa M. Saleh
- Egypt Department of Chemistry, Faculty of Science, Al-Azhar University (Girls Branch), Youssef Abbas Str., Cairo 11651, Egypt;
| | - Ahmed A. Elhenawy
- Department of Chemistry, Faculty of Science and Arts in Al-Mukhwah, Al-Baha University, Al Bahah 65511, Saudi Arabia;
- Chemistry Department, Al-Azhar University, Cairo 11651, Egypt
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3
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Arbab S, Ullah H, Khan MIU, Khattak MNK, Zhang J, Li K, Hassan IU. Diversity and distribution of thermophilic microorganisms and their applications in biotechnology. J Basic Microbiol 2021; 62:95-108. [PMID: 34878177 DOI: 10.1002/jobm.202100529] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2021] [Revised: 11/16/2021] [Accepted: 11/27/2021] [Indexed: 11/07/2022]
Abstract
Hot springs ecosystem is the most ancient continuously inhabited ecosystem on earth which harbors diverse thermophilic bacteria and archaea distributed worldwide. Life in extreme environments is very challenging so there is a great potential biological dark matter and their adaptation to harsh environments eventually producing thermostable enzymes which are very vital for the welfare of mankind. There is an enormous need for a new generation of stable enzymes that can endure harsh conditions in industrial processes and can either substitute or complement conventional chemical processes. Here, we review at the variety and distribution of thermophilic microbes, as well as the different thermostable enzymes that help them survive at high temperatures, such as proteases, amylases, lipases, cellulases, pullulanase, xylanases, and DNA polymerases, as well as their special properties, such as high-temperature stability. We have documented the novel isolated thermophilic and hyperthermophilic microorganisms, as well as the discovery of their enzymes, demonstrating their immense potential in the scientific community and in industry.
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Affiliation(s)
- Safia Arbab
- Key Laboratory of Veterinary Pharmaceutical Development, Ministry of Agriculture, Lanzhou, China.,Key Laboratory of New Animal Drug Project of Gansu Province, Lanzhou, China.,Lanzhou Institute of Husbandry and Pharmaceutical Sciences, Chinese Academy of Agricultural Sciences, Lanzhou, China
| | - Hanif Ullah
- West China School of Nursing, Sichuan University, Chengdu, China
| | - Muhammad I U Khan
- State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Wuhan, China
| | - Muhammad N K Khattak
- Department of Applied Biology, College of Sciences, University of Sharjah, Sharjah, United Arab Emirates
| | - Jiyu Zhang
- Key Laboratory of Veterinary Pharmaceutical Development, Ministry of Agriculture, Lanzhou, China.,Key Laboratory of New Animal Drug Project of Gansu Province, Lanzhou, China.,Lanzhou Institute of Husbandry and Pharmaceutical Sciences, Chinese Academy of Agricultural Sciences, Lanzhou, China
| | - Ka Li
- West China School of Nursing, Sichuan University, Chengdu, China
| | - Inam Ul Hassan
- Department of Microbiology, Hazara University, Manshera, Pakistan
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4
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Gaytán I, Burelo M, Loza-Tavera H. Current status on the biodegradability of acrylic polymers: microorganisms, enzymes and metabolic pathways involved. Appl Microbiol Biotechnol 2021; 105:991-1006. [PMID: 33427930 PMCID: PMC7798386 DOI: 10.1007/s00253-020-11073-1] [Citation(s) in RCA: 29] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2020] [Revised: 12/14/2020] [Accepted: 12/23/2020] [Indexed: 12/18/2022]
Abstract
Abstract Acrylic polymers (AP) are a diverse group of materials with broad applications, frequent use, and increasing demand. Some of the most used AP are polyacrylamide, polyacrylic acid, polymethyl methacrylates, and polyacrylonitrile. Although no information for the production of all AP types is published, data for the most used AP is around 9 MT/year, which gives an idea of the amount of waste that can be generated after products’ lifecycles. After its lifecycle ends, the fate of an AP product will depend on its chemical structure, the environmental setting where it was used, and the regulations for plastic waste management existing in the different countries. Even though recycling is the best fate for plastic polymer wastes, few AP can be recycled, and most of them end up in landfills. Because of the pollution crisis the planet is immersed, setting regulations and developing technological strategies for plastic waste management are urgent. In this regard, biotechnological approaches, where microbial activity is involved, could be attractive eco-friendly strategies. This mini-review describes the broad AP diversity, their properties and uses, and the factors affecting their biodegradability, underlining the importance of standardizing biodegradation quantification techniques. We also describe the enzymes and metabolic pathways that microorganisms display to attack AP chemical structure and predict some biochemical reactions that could account for quaternary carbon-containing AP biodegradation. Finally, we analyze strategies to increase AP biodegradability and stress the need for more studies on AP biodegradation and developing stricter legislation for AP use and waste control. Key points • Acrylic polymers (AP) are a diverse and extensively used group of compounds. • The environmental fates and health effects of AP waste are not completely known. • Microorganisms and enzymes involved in AP degradation have been identified. • More biodegradation studies are needed to develop AP biotechnological treatments. Supplementary Information The online version contains supplementary material available at 10.1007/s00253-020-11073-1.
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Affiliation(s)
- Itzel Gaytán
- Departamento de Bioquímica, Facultad de Química, Universidad Nacional Autónoma de México, Ave. Universidad 3000. Col. UNAM., 04510, Mexico City, México
| | - Manuel Burelo
- Laboratorio de Química Sostenible, Departamento de Química Analítica, Facultad de Química, Universidad Nacional Autónoma de México, Ave. Universidad 3000. Col. UNAM., 04510, Mexico City, México
| | - Herminia Loza-Tavera
- Departamento de Bioquímica, Facultad de Química, Universidad Nacional Autónoma de México, Ave. Universidad 3000. Col. UNAM., 04510, Mexico City, México.
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5
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Padash A, Halabian R, Salimi A, Kazemi NM, Shahrousvand M. Osteogenic differentiation of mesenchymal stem cells on the bimodal polymer polyurethane/polyacrylonitrile containing cellulose phosphate nanowhisker. Hum Cell 2020; 34:310-324. [PMID: 33090371 DOI: 10.1007/s13577-020-00449-0] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2020] [Accepted: 10/09/2020] [Indexed: 11/26/2022]
Abstract
Polycaprolactone diol is the cornerstone, equipped with polyacrylonitrile and cellulose nanowhiskers (CNWs), of biocompatible and biodegradable polyurethanes (PUs). The solvent casting/particulate leaching technique was employed to contracting foam scaffolds with bimodal sizes from the combination of polyurethane/polyacrylonitrile/cellulose nanowhisker nanocomposites. Sugar and sodium chloride are components used as porogens to develop the leaching method and fabricate the 3D scaffolds. Incorporation of different percentages of cellulose nanowhisker leads to the various efficient structures with biodegradability and biocompatibility properties. All nanocomposites scaffolds, as revealed by MTT assay using mesenchymal stem cell (MSC) lines, were non-cytotoxic. PU/PAN/CNW foam scaffolds were used for osteogenic differentiation of human mesenchymal stem cells (hMSCs). Based on the results, PU/PAN/CNW nanocomposites could not only support osteogenic differentiation but can also enhance the proliferation of hMSCs in three-dimensional synthetic extracellular matrix.
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Affiliation(s)
- Arash Padash
- Department of Medical Nanotechnology, Faculty of Advanced Sciences and Technology, Pharmaceutical Sciences Branch, Islamic Azad University, Tehran, Iran
| | - Raheleh Halabian
- Applied Microbiology Research Center, Systems Biology and Poisonings Institute, Baqiyatallah University of Medical Sciences, Tehran, Iran.
| | - Ali Salimi
- Nanobiotechnology Research Center, Baqiyatallah University of Medical Sciences, Tehran, Iran.
| | - Negar Motakef Kazemi
- Department of Medical Nanotechnology, Faculty of Advanced Sciences and Technology, Pharmaceutical Sciences Branch, Islamic Azad University, Tehran, Iran
| | - Mohsen Shahrousvand
- Department of Polymer Engineering and Color Technology, Amirkabir University of Technology, Tehran, Iran
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6
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Ramadan MF, Sitohy MZ. Phosphorylated Starches: Preparation, Properties, Functionality, and Techno‐Applications. STARCH-STARKE 2020. [DOI: 10.1002/star.201900302] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Mohamed Fawzy Ramadan
- Agricultural Biochemistry Department, Faculty of AgricultureZagazig University Zagazig 44519 Egypt
- Deanship of Scientific ResearchUmm Al‐Qura University Makkah P. O. Box 175 Kingdom of Saudi Arabia
| | - Mahmoud Z. Sitohy
- Agricultural Biochemistry Department, Faculty of AgricultureZagazig University Zagazig 44519 Egypt
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7
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Advances in cloning, structural and bioremediation aspects of nitrile hydratases. Mol Biol Rep 2019; 46:4661-4673. [DOI: 10.1007/s11033-019-04811-w] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2018] [Accepted: 04/10/2019] [Indexed: 01/09/2023]
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8
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Egea TC, da Silva R, Boscolo M, Rigonato J, Monteiro DA, Grünig D, da Silva H, van der Wielen F, Helmus R, Parsons JR, Gomes E. Diuron degradation by bacteria from soil of sugarcane crops. Heliyon 2017; 3:e00471. [PMID: 29322098 PMCID: PMC5753625 DOI: 10.1016/j.heliyon.2017.e00471] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2017] [Revised: 10/24/2017] [Accepted: 11/24/2017] [Indexed: 12/03/2022] Open
Abstract
The isolation of microorganisms from soil impacted by xenobiotic chemicals and exposing them in the laboratory to the contaminant can provide important information about their response to the contaminants. The purpose of this study was to isolate bacteria from soil with historical application of herbicides and to evaluate their potential to degrade diuron. The isolation media contained either glucose or diuron as carbon source. A total of 400 bacteria were isolated, with 68% being Gram-positive and 32% Gram-negative. Most isolates showed potential to degrade between 10 and 30% diuron after five days of cultivation; however Stenotrophomonas acidophila TD4.7 and Bacillus cereus TD4.31 were able to degrade 87% and 68%, respectively. The degradation of diuron resulted in the formation of the metabolites DCPMU, DCPU, DCA, 3,4-CAC, 4-CA, 4-CAC and aniline. Based on these results it was proposed that Pseudomonas aeruginosa TD2.3, Stenotrophomonas acidaminiphila TD4.7, B. cereus TD4.31 and Alcaligenes faecalis TG 4.48, act on 3,4-DCA and 4-CA by alkylation and dealkylation while Micrococcus luteus and Achromobacter sp follow dehalogenation directly to aniline. Growth on aniline as sole carbon source demonstrates the capacity of strains to open the aromatic ring. In conclusion, the results show that the role of microorganisms in the degradation of xenobiotics in the environment depends on their own metabolism and also on their synergistic interactions.
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Affiliation(s)
- Tassia C. Egea
- Ibilce-Universidade Estadual Paulista-UNESP, São José do Rio Preto, São Paulo, Brazil
| | - Roberto da Silva
- Ibilce-Universidade Estadual Paulista-UNESP, São José do Rio Preto, São Paulo, Brazil
| | - Maurício Boscolo
- Ibilce-Universidade Estadual Paulista-UNESP, São José do Rio Preto, São Paulo, Brazil
| | | | - Diego A. Monteiro
- Ibilce-Universidade Estadual Paulista-UNESP, São José do Rio Preto, São Paulo, Brazil
| | - Danilo Grünig
- Faculty of Science Institute for Biodiversity and Ecosystem Dynamics, University of Amsterdam, Netherlands
| | - Humberto da Silva
- Ibilce-Universidade Estadual Paulista-UNESP, São José do Rio Preto, São Paulo, Brazil
| | - Frans van der Wielen
- Faculty of Science Institute for Biodiversity and Ecosystem Dynamics, University of Amsterdam, Netherlands
| | - Rick Helmus
- Faculty of Science Institute for Biodiversity and Ecosystem Dynamics, University of Amsterdam, Netherlands
| | - John R. Parsons
- Faculty of Science Institute for Biodiversity and Ecosystem Dynamics, University of Amsterdam, Netherlands
| | - Eleni Gomes
- Ibilce-Universidade Estadual Paulista-UNESP, São José do Rio Preto, São Paulo, Brazil
- Corresponding author.
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9
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Meimoun J, Wiatz V, Saint-Loup R, Parcq J, Favrelle A, Bonnet F, Zinck P. Modification of starch by graft copolymerization. STARCH-STARKE 2017. [DOI: 10.1002/star.201600351] [Citation(s) in RCA: 53] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Julie Meimoun
- Univ. Lille, CNRS, Centrale Lille, ENSCL, Univ. Artois; UMR 8181 - UCCS - Unité de Catalyse et Chimie du Solide; Lille France
- Institut Français des Matériaux Agro-Sourcés; Villeneuve-d'Ascq France
| | | | | | | | - Audrey Favrelle
- Univ. Lille, CNRS, Centrale Lille, ENSCL, Univ. Artois; UMR 8181 - UCCS - Unité de Catalyse et Chimie du Solide; Lille France
| | - Fanny Bonnet
- Univ. Lille, CNRS, Centrale Lille, ENSCL, Univ. Artois; UMR 8181 - UCCS - Unité de Catalyse et Chimie du Solide; Lille France
| | - Philippe Zinck
- Univ. Lille, CNRS, Centrale Lille, ENSCL, Univ. Artois; UMR 8181 - UCCS - Unité de Catalyse et Chimie du Solide; Lille France
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10
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Rapheeha OKL, Roux-van der Merwe MP, Badenhorst J, Chhiba V, Bode ML, Mathiba K, Brady D. Hydrolysis of nitriles by soil bacteria: variation with soil origin. J Appl Microbiol 2016; 122:686-697. [PMID: 27930842 DOI: 10.1111/jam.13367] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2016] [Revised: 11/09/2016] [Accepted: 11/28/2016] [Indexed: 12/01/2022]
Abstract
AIMS The aim of this study was to explore bacterial soil diversity for nitrile biocatalysts, in particular, those for hydrolysis of β-substituted nitriles, to the corresponding carboxamides and acids that may be incorporated into peptidomimetics. To achieve this, we needed to compare the efficiency of isolation methods and determine the influence of land use and geographical origin of the soil sample. METHODS AND RESULTS Nitrile-utilizing bacteria were isolated from various soil environments across a 1000 km long transect of South Africa, including agricultural soil, a gold mine tailing dam and uncultivated soil. The substrate profile of these isolates was determined through element-limited growth studies on seven different aliphatic or aromatic nitriles. A subset of these organisms expressing broad substrate ranges was evaluated for their ability to hydrolyse β-substituted nitriles (3-amino-3-phenylpropionitrile and 3-hydroxy-4-phenoxybutyronitrile) and the active organisms were found to be Rhodococcus erythropolis from uncultivated soil and Rhodococcus rhodochrous from agricultural soils. CONCLUSIONS The capacity for hydrolysis of β-substituted nitriles appears to reside almost exclusively in Rhodococci. Land use has a much greater effect on the biocatalysis substrate profile than geographical location. SIGNIFICANCE AND IMPACT OF THE STUDY Enzymes are typically substrate specific in their catalytic reactions, and this means that a wide diversity of enzymes is required to provide a comprehensive biocatalysis toolbox. This paper shows that the microbial diversity of nitrile hydrolysis activity can be targeted according to land utilization. Nitrile biocatalysis is a green chemical method for the enzymatic production of amides and carboxylic acids that has industrial applications, such as in the synthesis of acrylamide and nicotinamide. The biocatalysts discovered in this study may be applied to the synthesis of peptidomimetics which are an important class of therapeutic compounds.
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Affiliation(s)
- O K L Rapheeha
- Department of Biotechnology and Food Technology, Tshwane University of Technology, Pretoria, South Africa
| | - M P Roux-van der Merwe
- Department of Biotechnology and Food Technology, Tshwane University of Technology, Pretoria, South Africa
| | - J Badenhorst
- Department of Biotechnology and Food Technology, Tshwane University of Technology, Pretoria, South Africa
| | - V Chhiba
- CSIR Biosciences, Pretoria, South Africa.,Molecular Sciences Institute, School of Chemistry, University of the Witwatersrand, Johannesburg, South Africa
| | - M L Bode
- Molecular Sciences Institute, School of Chemistry, University of the Witwatersrand, Johannesburg, South Africa
| | - K Mathiba
- CSIR Biosciences, Pretoria, South Africa
| | - D Brady
- Department of Biotechnology and Food Technology, Tshwane University of Technology, Pretoria, South Africa.,CSIR Biosciences, Pretoria, South Africa.,Molecular Sciences Institute, School of Chemistry, University of the Witwatersrand, Johannesburg, South Africa
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11
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Veethahavya K, Rajath B, Noobia S, Kumar BM. Biodegradation of Low Density Polyethylene in Aqueous Media. ACTA ACUST UNITED AC 2016. [DOI: 10.1016/j.proenv.2016.07.072] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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12
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The physical and degradation properties of starch-graft-acrylonitrile/carboxylated nitrile butadiene rubber latex films. Carbohydr Polym 2015; 128:1-10. [DOI: 10.1016/j.carbpol.2015.04.004] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2015] [Revised: 03/25/2015] [Accepted: 04/06/2015] [Indexed: 11/21/2022]
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13
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Microbial transformation of nitriles to high-value acids or amides. ADVANCES IN BIOCHEMICAL ENGINEERING/BIOTECHNOLOGY 2014. [PMID: 19475377 DOI: 10.1007/10_2008_25] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register]
Abstract
Biotransformation of nitriles mediated by nitrile-amide converting enzymes has attracted considerable attention and developed tremendously in the recent years in China since it offers a valuable alternative to traditional chemical reaction which requires harsh conditions. As a result, an upsurge of these promising enzymes (including nitrile hydratase, nitrilase and amidase) has been taking place. This review aims at describing these enzymes in detail. A variety of microorganisms harboring nitrile-amide converting activities have been isolated and identified in China, some of which have already applied with moderate success. Currently, a wide range of high-value compounds such as aliphatic, alicyclic, aromatic and heterocyclic amides and their corresponding acids were provided by these nitrile-amide degrading organisms. Simultaneously, with the increasing demand of chiral substances, the enantioselectivity of the nitrilase superfamily is widely investigated and exploited in China, especially the bioconversion of optically active alpha-substituted phenylacetamides, acids and 2,2-dimethylcyclopropanecarboxamide and 2,2-dimethylcyclopropanecarboxylic acid by means of the catalysts exhibiting excellent stereoselectivity. Besides their synthetic value, the nitrile-amide converting enzymes also play an important role in environmental protection. In this context, cloning of the genes and expression of these enzymes are presented. In the near future in China, an increasing number of novel nitrile-amide converting organisms will be screened and their potential in the synthesis of useful acids and amides will be further exploited.
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14
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Shang XY, Fu X, Chen XD, Yang LS. Biodegradation of blends of polyethylene-octene elastomer with starches by fungi. J Appl Polym Sci 2009. [DOI: 10.1002/app.30982] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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15
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Carmona-Garcia R, Aguirre-Cruz A, Yee-Madeira H, Bello-Pérez LA. Dual Modification of Banana Starch: Partial Characterization. STARCH-STARKE 2009. [DOI: 10.1002/star.200900152] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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16
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Factors influencing the physico-chemical, morphological, thermal and rheological properties of some chemically modified starches for food applications—A review. Food Hydrocoll 2007. [DOI: 10.1016/j.foodhyd.2006.02.006] [Citation(s) in RCA: 702] [Impact Index Per Article: 41.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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17
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Baxter J, Garton NJ, Cummings SP. The impact of acrylonitrile and bioaugmentation on the biodegradation activity and bacterial community structure of a topsoil. Folia Microbiol (Praha) 2006; 51:591-7. [PMID: 17455796 DOI: 10.1007/bf02931624] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
The analysis of the bacterial community within the soil using DGGE showed acrylonitrile (ACN) could lead to the selection of significantly similar communities. Moreover, Rhodococcus sp. AJ270 was successfully established in the soil community. High GC G+-bacteria also responded positively to ACN addition. Bioaugmentation or carbon addition had no impact on the rate or degree of ACN degradation. ACN could be readily degraded by the soil bacteria, however, the community structure was significantly affected by its addition as well as by the addition of carbon or Rhodococcus sp. AJ270. The bioaugmentation of the soil with this strain was successful, in that the organism became established within the community. ACN addition to a soil produces statistically significant changes in the bacterial community.
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Affiliation(s)
- J Baxter
- Biomolecular and Biomedical Research Centre, School of Applied Sciences, Northumbria University, Newcastle-upon-Tyne, UK
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18
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Wang YJ, Zheng YG, Xue JP, Shen YC. Microbial transformation of indole-3-acetonitrile to indole-3-acetamide by Nocardia sp. 108. Process Biochem 2006. [DOI: 10.1016/j.procbio.2006.03.016] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Abstract
Starch is one of the most important but flexible food ingredients possessing value added attributes for innumerable industrial applications. Its various chemically modified derivatives offer a great scope of high technological value in both food and non-food industries. Modified starches are designed to overcome one or more of the shortcomings, such as loss of viscosity and thickening power upon cooking and storage, particularly at low pH, retrogradation characteristics, syneresis, etc., of native starches. Oxidation, esterification, hydroxyalkylation, dextrinization, and cross-linking are some of the modifications commonly employed to prepare starch derivatives. In a way, starch modification provides desirable functional attributes as well as offering economic alternative to other hydrocolloid ingredients, such as gums and mucilages, which are unreliable in quality and availability. Resistant starch, a highly retrograded starch fractionformed upon food processing, is another useful starch derivative. It exhibits the beneficial physiological effects of therapeutic and nutritional values akin to dietary fiber. There awaits considerable opportunity for future developments, especially for tailor-made starch derivatives with multiple modifications and with the desired functional and nutritional properties, although the problem of obtaining legislative approval for the use of novel starch derivatives in processed food formulations is still under debate. Nevertheless, it can be predicted that new ventures in starch modifications and their diverse applications will continue to be of great interest in applied research.
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Affiliation(s)
- Rudrapatnam N Tharanathan
- Department of Biochemistry and Nutrition, Central Food Technological Research Institute, Mysore, India
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Andretta CWS, Rosa RM, Tondo EC, Gaylarde CC, Henriques JAP. Identification and molecular characterization of a Bacillus subtilis IS13 strain involved in the biodegradation of 4,5,6-trichloroguaiacol. CHEMOSPHERE 2004; 55:631-639. [PMID: 15006516 DOI: 10.1016/j.chemosphere.2003.11.062] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/16/2002] [Revised: 09/02/2003] [Accepted: 11/29/2003] [Indexed: 05/24/2023]
Abstract
4,5,6-Trichloroguaiacol (4,5,6-TCG) is a recalcitrant organochlorine compound produced during pulp bleaching and a potential environmental hazard in paper mill effluents. We report here the identification by biochemical tests and molecular biological analysis, using 16S ribotyping, of a 4,5,6-TCG-degrading bacterium, identified as a strain of Bacillus subtilis that is most closely related according to the phylogenetic analysis to B. subtilis strain Lactipan (alignment score 99%). Biodegradation of 4,5,6-TCG by this organism in a mineral salts medium was shown to occur only when the inoculum was composed of cells in the stationary phase of growth and to be accelerated by an additional carbon source, such as glucose, sucrose, glycerol or molasses. An additional nitrogen source (as ammonium sulfate) did not affect the rate of 4,5,6-TGC removal. No plasmids were detected in the bacterial cells. This is the first strain of B. subtilis which degrades chlorophenols and shows that 4,5,6-TCG is not degraded by cometabolism and that the gene encoding this characteristic is probably located on the chromosome. The lack of requirement for additional nitrogen source, the ability to enhance biodegradation by adding cheap carbon sources such as molasses, and the fact the trait is likely to be stable since it is encoded on the cell chromosome, are all characteristics that make the organism an attractive possibility for treatment of wastes and environments polluted with organochlorine compounds.
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Affiliation(s)
- C W S Andretta
- Centro de Biotecnologia/Departamento de Biofísica, Universidade Federal do Rio Grande do Sul, Cx. Postal 15005, Av. Bento Gonçalves 9500, Porto Alegre, RS, CEP 91501-970, Brazil
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Sitohy MZ, Ramadan MF. Degradability of Different Phosphorylated Starches and Thermoplastic Films Prepared from Corn Starch Phosphomonoesters. STARCH-STARKE 2001. [DOI: 10.1002/1521-379x(200107)53:7<317::aid-star317>3.0.co;2-n] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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