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Ferreira BL, Ferreira DP, Borges SF, Ferreira AM, Holanda FH, Ucella-Filho JGM, Cruz RAS, Birolli WG, Luque R, Ferreira IM. Diclofenac, ibuprofen, and paracetamol biodegradation: overconsumed non-steroidal anti-inflammatories drugs at COVID-19 pandemic. Front Microbiol 2023; 14:1207664. [PMID: 37965564 PMCID: PMC10642723 DOI: 10.3389/fmicb.2023.1207664] [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: 04/17/2023] [Accepted: 10/02/2023] [Indexed: 11/16/2023] Open
Abstract
The consumption of non-steroidal anti-inflammatory drugs (NSAIDs) have increased significantly in the last years (2020-2022), especially for patients in COVID-19 treatment. NSAIDs such as diclofenac, ibuprofen, and paracetamol are often available without restrictions, being employed without medical supervision for basic symptoms of inflammatory processes. Furthermore, these compounds are increasingly present in nature constituting complex mixtures discarded at domestic and hospital sewage/wastewater. Therefore, this review emphasizes the biodegradation of diclofenac, ibuprofen, and paracetamol by pure cultures or consortia of fungi and bacteria at in vitro, in situ, and ex situ processes. Considering the influence of different factors (inoculum dose, pH, temperature, co-factors, reaction time, and microbial isolation medium) relevant for the identification of highly efficient alternatives for pharmaceuticals decontamination, since biologically active micropollutants became a worldwide issue that should be carefully addressed. In addition, we present a quantitative bibliometric survey, which reinforces that the consumption of these drugs and consequently their impact on the environment goes beyond the epidemiological control of COVID-19.
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Affiliation(s)
- Beatriz L. Ferreira
- Biocatalysis and Applied Organic Synthesis Laboratory, Federal University of Amapá, Macapá, AP, Brazil
| | - Dionisia P. Ferreira
- Biocatalysis and Applied Organic Synthesis Laboratory, Federal University of Amapá, Macapá, AP, Brazil
| | - Swanny F. Borges
- Biocatalysis and Applied Organic Synthesis Laboratory, Federal University of Amapá, Macapá, AP, Brazil
| | - Adriana M. Ferreira
- Biocatalysis and Applied Organic Synthesis Laboratory, Federal University of Amapá, Macapá, AP, Brazil
| | - Fabricio H. Holanda
- Biocatalysis and Applied Organic Synthesis Laboratory, Federal University of Amapá, Macapá, AP, Brazil
| | - João G. M. Ucella-Filho
- Department of Forestry and Wood Sciences, Federal University of Espírito Santo, Jerônimo Monteiro, Espirito Santo, Brazil
| | - Rodrigo Alves S. Cruz
- Biocatalysis and Applied Organic Synthesis Laboratory, Federal University of Amapá, Macapá, AP, Brazil
| | - Willian G. Birolli
- Molecular Oncology Research Center, Institute of Learning and Research, Barretos Cancer Hospital, Barretos, SP, Brazil
| | - Rafael Luque
- Universidad ECOTEC, Via Principal Campus Ecotec, Samborondón, Ecuador
| | - Irlon M. Ferreira
- Biocatalysis and Applied Organic Synthesis Laboratory, Federal University of Amapá, Macapá, AP, Brazil
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Mechanism of Microbial Detoxification of Heavy Metals: A Review. JOURNAL OF PURE AND APPLIED MICROBIOLOGY 2022. [DOI: 10.22207/jpam.16.3.64] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Heavy metal contamination from anthropogenic activities has an adverse effect on the environment due to its cytotoxicity, carcinogenicity and mutagenicity. Environment harbours microorganisms, some of which have been found to modify physico-chemical conditions of their surrounding environment through certain processes such as detoxification, metal homeostasis, precipitation, redox transformations etc. Investigations in the past have shown that short term contact with metals of certain bacteria causes the selection of resistant bacteria within weeks, while a prolonged exposure showed selected strains able to thrive better. Hence biotic methods could assist removal of heavy metals based on biosorption or bioaccumulation by microorganisms, which are cost-effective and environmental friendly in the long run. Microbial remediation is influenced by biotic and environmental factors as also the contamination site characteristics. The aim of this paper is to highlight and review some of the mechanisms of microbial remediation through techniques such as biostimulation, bioaugmentation etc.
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Zhang Y, Gao S, Qi X, Zhu S, Xu S, Liang Y, Kong F, Yang S, Wang R, Wang Y, An Y. Novel biocatalytic strategy of levan: His-ELP-intein-tagged protein purification and biomimetic mineralization. Carbohydr Polym 2022; 288:119398. [DOI: 10.1016/j.carbpol.2022.119398] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2022] [Revised: 03/08/2022] [Accepted: 03/19/2022] [Indexed: 01/13/2023]
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Characterization of Gentisate 1,2-Dioxygenase from Pseudarthrobacter phenanthrenivorans Sphe3 and Its Stabilization by Immobilization on Nickel-Functionalized Magnetic Nanoparticles. Appl Microbiol 2022. [DOI: 10.3390/applmicrobiol2010007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The aim of this study was the biochemical and kinetic characterization of the gentisate 1,2-dioxygenase (GDO) from Pseudarthrobacter phenanthrenivorans Sphe3 and the development of a nanobiocatalyst by its immobilization on Ni2+-functionalized Fe3O4-polydopamine magnetic nanoparticles (Ni2+-PDA-MNPs). This is the first GDO to be immobilized. The gene encoding the GDO was cloned with an N-terminal His-tag and overexpressed in E. coli. The nanoparticles showed a high purification efficiency of GDO from crude cell lysates with a maximum activity recovery of 97%. The immobilized enzyme was characterized by Fourier transform infrared spectroscopy (FTIR). The reaction product was identified by 1H NMR. Both free and immobilized GDO exhibited Michaelis–Menten kinetics with Km values of 25.9 ± 4.4 and 82.5 ± 14.2 μM and Vmax values of 1.2 ± 0.1 and 0.03 ± 0.002 mM*s−1, respectively. The thermal stability of the immobilized GDO was enhanced at 30 °C, 40 °C, and 50 °C, compared to the free GDO. Stored at −20 °C, immobilized GDO retained more than 60% of its initial activity after 30 d, while the free enzyme completely lost its activity after 10 d. Furthermore, the immobilized nanoparticle–enzyme conjugate retained more than 50% enzyme activity up to the fifth cycle.
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Degradation of 2,4,6-Trinitrotoluene (TNT): Involvement of Protocatechuate 3,4-Dioxygenase (P34O) in Buttiauxella sp. S19-1. TOXICS 2021; 9:toxics9100231. [PMID: 34678927 PMCID: PMC8540567 DOI: 10.3390/toxics9100231] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/17/2021] [Revised: 09/13/2021] [Accepted: 09/17/2021] [Indexed: 11/22/2022]
Abstract
Extensive use and disposal of 2,4,6-trinitrotoluene (TNT), a primary constituent of explosives, pollutes the environment and causes severe damage to human health. Complete mineralization of TNT via bacterial degradation has recently gained research interest as an effective method for the restoration of contaminated sites. Here, screening for TNT degradation by six selected bacteria revealed that Buttiauxella sp. S19-1, possesses the strongest degrading ability. Moreover, BuP34O (a gene encoding for protocatechuate 3,4-dioxygenase—P34O, a key enzyme in the β-ketoadipate pathway) was upregulated during TNT degradation. A knockout of BuP34O in S19-1 to generate S-M1 mutant strain caused a marked reduction in TNT degradation efficiency compared to S19-1. Additionally, the EM1 mutant strain (Escherichia coli DH5α transfected with BuP34O) showed higher degradation efficiency than DH5α. Gas chromatography mass spectrometry (GC-MS) analysis of TNT degradation by S19-1 revealed 4-amino-2,6-dinitrotolune (ADNT) as the intermediate metabolite of TNT. Furthermore, the recombinant protein P34O (rP34O) expressed the activity of 2.46 µmol/min·mg. Our findings present the first report on the involvement of P34O in bacterial degradation of TNT and its metabolites, suggesting that P34O could catalyze downstream reactions in the TNT degradation pathway. In addition, the TNT-degrading ability of S19-1, a Gram-negative marine-derived bacterium, presents enormous potential for restoration of TNT-contaminated seas.
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Zhang Y, Qi X, Yao S, Gao S, Xu S, Wang H, Liu X, An Y. Construction of novel curdlan-based and Ca 2+-chelated magnetic microspheres (CCMM) for efficient protein purification and oriented immobilization. Enzyme Microb Technol 2021; 148:109802. [PMID: 34116763 DOI: 10.1016/j.enzmictec.2021.109802] [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: 01/09/2021] [Revised: 03/12/2021] [Accepted: 04/09/2021] [Indexed: 11/30/2022]
Abstract
In this study, curdlan-based and calcium ion (Ca2+)-chelated magnetic microspheres (CCMM) were prepared for protein purification and oriented immobilization. Additional purification steps before immobilization were not required. CCMM samples were produced by reverse embedding of Fe3O4 nanoparticles with curdlan and chelated with Ca2+ in the presence of iminodiacetic acid. The β-xylanase XynII from Trichoderma reesei QM6a was used to investigate the efficiency of CCMM preparation. The resulting CCMM-XynII was found to be very stable, showing 82 % and 60 % of initial activities after storage for 35 days and after being assayed ten times, respectively. In addition, the CCMM-XynII showed higher stabilities in the presence of organic solvents and multiple chemicals than the free XynII, suggesting that the CCMM-XynII could be efficient for applications requiring the presence of organic solvents. In addition, CCMM may be more suitable than commercially available Ni-NTA for purification of proteins intolerant of Ni2+.
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Affiliation(s)
- Yifeng Zhang
- College of Food Science, Shenyang Agricultural University, No.120 Dongling Road, Shenyang, 110161, China; College of Biosciences and Biotechnology, Shenyang Agricultural University, Shenyang, China.
| | - Xianghui Qi
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang, China.
| | - Shuo Yao
- College of Biosciences and Biotechnology, Shenyang Agricultural University, Shenyang, China.
| | - Song Gao
- College of Biosciences and Biotechnology, Shenyang Agricultural University, Shenyang, China.
| | - Shumin Xu
- College of Food Science, Shenyang Agricultural University, No.120 Dongling Road, Shenyang, 110161, China; College of Biosciences and Biotechnology, Shenyang Agricultural University, Shenyang, China.
| | - Hongling Wang
- College of Food Science, Shenyang Agricultural University, No.120 Dongling Road, Shenyang, 110161, China; College of Biosciences and Biotechnology, Shenyang Agricultural University, Shenyang, China.
| | - Xia Liu
- College of Biosciences and Biotechnology, Shenyang Agricultural University, Shenyang, China.
| | - Yingfeng An
- College of Food Science, Shenyang Agricultural University, No.120 Dongling Road, Shenyang, 110161, China; College of Biosciences and Biotechnology, Shenyang Agricultural University, Shenyang, China.
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Structure Elucidation and Biochemical Characterization of Environmentally Relevant Novel Extradiol Dioxygenases Discovered by a Functional Metagenomics Approach. mSystems 2019; 4:4/6/e00316-19. [PMID: 31771973 PMCID: PMC6880040 DOI: 10.1128/msystems.00316-19] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
The release of synthetic chemical pollutants in the environment is posing serious health risks. Enzymes, including oxygenases, play a crucial role in xenobiotic degradation. In the present study, we employed a functional metagenomics approach to overcome the limitation of cultivability of microbes under standard laboratory conditions in order to isolate novel dioxygenases capable of degrading recalcitrant pollutants. Fosmid clones possessing dioxygenase activity were further sequenced, and their genes were identified using bioinformatics tools. Two positive fosmid clones, SD3 and RW1, suggested the presence of 2,3-dihydroxybiphenyl 1,2-dioxygenase (BphC-SD3) and catechol 2,3-dioxygenase (C23O-RW1), respectively. Recombinant versions of these enzymes were purified to examine their pollutant-degrading abilities. The crystal structure of BphC-SD3 was determined at 2.6-Å resolution, revealing a two-domain architecture, i.e., N-terminal and C-terminal domains, with the sequential arrangement of βαβββ in each domain, characteristic of Fe-dependent class II type I extradiol dioxygenases. The structure also reveals the presence of conserved amino acids lining the catalytic pocket and Fe3+ metal ion in the large funnel-shaped active site in the C-terminal domain. Further studies suggest that Fe3+ bound in the BphC-SD3 active site probably imparts aerobic stability. We further demonstrate the potential application of BphC-SD3 in biosensing of catecholic compounds. The halotolerant and oxygen-resistant properties of these enzymes reported in this study make them potential candidates for bioremediation and biosensing applications.IMPORTANCE The disposal and degradation of xenobiotic compounds have been serious issues due to their recalcitrant properties. Microbial oxygenases are the fundamental enzymes involved in biodegradation that oxidize the substrate by transferring oxygen from molecular oxygen. Among oxygenases, catechol dioxygenases are more versatile in biodegradation and are well studied among the bacterial world. The use of catechol dioxygenases in the field is currently not practical due to their aerobically unstable nature. The significance of our research lies in the discovery of aerobically stable and halotolerant catechol dioxygenases that are efficient in degrading the targeted environmental pollutants and, hence, could be used as cost-effective alternatives for the treatment of hypersaline industrial effluents. Moreover, the structural determination of novel catechol dioxygenases would greatly enhance our knowledge of the function of these enzymes and facilitate directed evolution to further enhance or engineer desired properties.
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Mycoremediation of PCBs by Pleurotus ostreatus: Possibilities and Prospects. APPLIED SCIENCES-BASEL 2019. [DOI: 10.3390/app9194185] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
With the rising awareness on environmental issues and the increasing risks through industrial development, clean up remediation measures have become the need of the hour. Bioremediation has become increasingly popular owing to its environmentally friendly approaches and cost effectiveness. Polychlorinated biphenyls (PCBs) are an alarming threat to human welfare as well as the environment. They top the list of hazardous xenobiotics. The multiple effects these compounds render to the niche is not unassessed. Bioremediation does appear promising, with myco remediation having a clear edge over bacterial remediation. In the following review, the inputs of white-rot fungi in PCB remediation are examined and the lacunae in the practical application of this versatile technology highlighted. The unique abilities of Pleurotus ostreatus and its deliverables with respect to removal of PCBs are presented. The need for improvising P. ostreatus-mediated remediation is emphasized.
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Tao Y, Li H, Gu J, Shi H, Han S, Jiao Y, Zhong G, Zhang Q, Akindolie MS, Lin Y, Chen Z, Zhang Y. Metabolism of diethyl phthalate (DEP) and identification of degradation intermediates by Pseudomonas sp. DNE-S1. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2019; 173:411-418. [PMID: 30798184 DOI: 10.1016/j.ecoenv.2019.02.055] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/24/2018] [Revised: 02/04/2019] [Accepted: 02/16/2019] [Indexed: 06/09/2023]
Abstract
A Pseudomonas sp. DNE-S1 (GenBank accession number MF803832), able to degrade DEP in a wide range of acid-base conditions, was isolated from landfill soil. The growth kinetics of DNE-S1 on DEP followed the inhibition model. Fe3+ could promote the degradation ability of DNE-S1 to DEP probably by over-expression of the gene phthalate dihydrodiol dehydrogenase (ophB) and phthalate dioxygenase ferredoxin reductase (ophA4). The degradation rate of DEP (500 mg L-1 at 12 h) increased by 14.5% in the presence of Fe3+. Cu2+, Zn2+, and Mn2+ showed an inhibiting effect on the degradation performance of the strain and could alter the cellular morphology, surface area and volume of DNE-S1. Three degradation intermediates, namely ethyl methyl phthalate (EMP), dimethyl phthalate (DMP), and phthalic acid (PA), were detected in the biodegradation of DEP, and the biochemical pathway of DEP degradation was proposed. This study provides new information on the biochemical pathways and the responsible genes involved in DEP degradation.
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Affiliation(s)
- Yue Tao
- School of Resources and Environment, Northeast Agricultural University, Harbin 150030, PR China
| | - Hanxu Li
- School of Resources and Environment, Northeast Agricultural University, Harbin 150030, PR China
| | - Jidong Gu
- Laboratory of Environmental Microbiology and Toxicology, School of Biological Sciences, The University of Hong Kong, Pokfulam Road, Hong Kong, Special Administrative Region
| | - Hongtao Shi
- School of Resources and Environment, Northeast Agricultural University, Harbin 150030, PR China
| | - Siyue Han
- School of Resources and Environment, Northeast Agricultural University, Harbin 150030, PR China
| | - Yaqi Jiao
- School of Resources and Environment, Northeast Agricultural University, Harbin 150030, PR China
| | - Guanyu Zhong
- School of Resources and Environment, Northeast Agricultural University, Harbin 150030, PR China
| | - Qi Zhang
- School of Resources and Environment, Northeast Agricultural University, Harbin 150030, PR China
| | - Modupe S Akindolie
- School of Resources and Environment, Northeast Agricultural University, Harbin 150030, PR China
| | - Yulong Lin
- School of Resources and Environment, Northeast Agricultural University, Harbin 150030, PR China
| | - Zhaobo Chen
- College of Environment and Resources, Dalian Minzu University, No. 18, Liaohe West Road, Jinzhou New District, Dalian, Liaoning Province, PR China
| | - Ying Zhang
- School of Resources and Environment, Northeast Agricultural University, Harbin 150030, PR China.
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Żur J, Wojcieszyńska D, Hupert-Kocurek K, Marchlewicz A, Guzik U. Paracetamol - toxicity and microbial utilization. Pseudomonas moorei KB4 as a case study for exploring degradation pathway. CHEMOSPHERE 2018; 206:192-202. [PMID: 29751245 DOI: 10.1016/j.chemosphere.2018.04.179] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/17/2017] [Revised: 04/25/2018] [Accepted: 04/30/2018] [Indexed: 06/08/2023]
Abstract
Paracetamol, a widely used analgesic and antipyretic drug, is currently one of the most emerging pollutants worldwide. Besides its wide prevalence in the literature only several bacterial strains able to degrade this compound have been described. In this study, we isolated six new bacterial strains able to remove paracetamol. The isolated strains were identified as the members of Pseudomonas, Bacillus, Acinetobacter and Sphingomonas genera and characterized phenotypically and biochemically using standard methods. From the isolated strains, Pseudomonas moorei KB4 was able to utilize 50 mg L-1 of paracetamol. As the main degradation products, p-aminophenol and hydroquinone were identified. Based on the measurements of specific activity of acyl amidohydrolase, deaminase and hydroquinone 1,2-dioxygenase and the results of liquid chromatography analyses, we proposed a mechanism of paracetamol degradation by KB4 strain under co-metabolic conditions with glucose. Additionally, toxicity bioassays and the influence of various environmental factors, including pH, temperature, heavy metals at no-observed-effective-concentrations, and the presence of aromatic compounds on the efficiency and mechanism of paracetamol degradation by KB4 strain were determined. This comprehensive study about paracetamol biodegradation will be helpful in designing a treatment systems of wastewaters contaminated with paracetamol.
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Affiliation(s)
- Joanna Żur
- Department of Biochemistry, Faculty of Biology and Environmental Protection, University of Silesia in Katowice, Jagiellońska 28, 40-032 Katowice, Poland.
| | - Danuta Wojcieszyńska
- Department of Biochemistry, Faculty of Biology and Environmental Protection, University of Silesia in Katowice, Jagiellońska 28, 40-032 Katowice, Poland.
| | - Katarzyna Hupert-Kocurek
- Department of Biochemistry, Faculty of Biology and Environmental Protection, University of Silesia in Katowice, Jagiellońska 28, 40-032 Katowice, Poland.
| | - Ariel Marchlewicz
- Department of Biochemistry, Faculty of Biology and Environmental Protection, University of Silesia in Katowice, Jagiellońska 28, 40-032 Katowice, Poland.
| | - Urszula Guzik
- Department of Biochemistry, Faculty of Biology and Environmental Protection, University of Silesia in Katowice, Jagiellońska 28, 40-032 Katowice, Poland.
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Draft Genome Sequence of Burkholderia gladioli Coa14, a Bacterium with Petroleum Bioremediation Potential Isolated from Coari Lake, Amazonas, Brazil. GENOME ANNOUNCEMENTS 2018; 6:6/16/e00301-18. [PMID: 29674552 PMCID: PMC5908936 DOI: 10.1128/genomea.00301-18] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Burkholderia gladioli Coa14 is a bacterium isolated from water collected from Coari Lake (Amazonas, Brazil) that shows a capacity for survival in a medium containing only oil as a carbon source. Here, we report its draft genome sequence, highlighting some genes involved with petroleum derivative degradation.
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Gür SD, İdil N, Aksöz N. Optimization of Enzyme Co-Immobilization with Sodium Alginate and Glutaraldehyde-Activated Chitosan Beads. Appl Biochem Biotechnol 2017; 184:538-552. [DOI: 10.1007/s12010-017-2566-5] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2017] [Accepted: 07/21/2017] [Indexed: 01/07/2023]
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Zhang LS, Fang Y, Zhou Y, Ye BC. Improvement of the Stabilization and Activity of Protocatechuate 3,4-Dioxygenase Isolated from Rhizobium sp. LMB-1 and Immobilized on Fe 3O 4 Nanoparticles. Appl Biochem Biotechnol 2017; 183:1035-1048. [PMID: 28516418 DOI: 10.1007/s12010-017-2481-9] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2017] [Accepted: 04/13/2017] [Indexed: 11/25/2022]
Abstract
Protocatechuate 3,4-dioxygenase (P34O), which is isolated from Rhizobium sp. LMB-1, catalyzes the ring cleavage step in the metabolism of aromatic compounds, and has great potential for environmental bioremediation. However, its structure is very sensitive to different environmental factors, which weaken its activity. Immobilization of the enzyme can improve its stability, allow reusability, and reduce operation costs. In this work, the relative molecular mass of the native P34O enzyme was determined to be 500 kDa by gel filtration chromatography on Sephadex G-200, and the enzyme was immobilized onto (3-aminopropyl) triethoxysilane-modified Fe3O4 nanoparticles (NPs) by the glutaraldehyde method. The optimum pH of immobilized and free P34O was unaffected, but the optimum temperature of immobilized P34O increased from 60 to 70 °C, and the thermal stability of immobilized P34O was better than that of the free enzyme and showed higher enzymatic activity at 60 and 70 °C. In addition, with the exception of Fe3+, most metal ions and organic chemicals could not improve the activity of free and immobilized P34O. The kinetic parameters of the immobilized P34O were higher than those of the free enzyme, and immobilized P34O on Fe3O4 NPs could be reused ten times without a remarkable decrease in enzymatic activity.
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Affiliation(s)
- Li-Shuang Zhang
- Department of Food Science and Technology, School of Bioengineering, East China University of Science and Technology, Meilong RD 130, Shanghai, 200237, China
| | - Yue Fang
- Department of Food Science and Technology, School of Bioengineering, East China University of Science and Technology, Meilong RD 130, Shanghai, 200237, China
| | - Ying Zhou
- Department of Food Science and Technology, School of Bioengineering, East China University of Science and Technology, Meilong RD 130, Shanghai, 200237, China.
| | - Bang-Ce Ye
- Laboratory of Biosystems and Microanalysis, State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Meilong RD 130, Shanghai, 200237, China.,School of Chemistry and Chemical Engineering, Shihezi University, Xinjiang, 832000, China
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Highly Efficient and Stable Novel NanoBiohybrid Catalyst to Avert 3,4-Dihydroxybenzoic Acid Pollutant in Water. Sci Rep 2016; 6:33572. [PMID: 27721429 PMCID: PMC5056344 DOI: 10.1038/srep33572] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2016] [Accepted: 08/25/2016] [Indexed: 11/08/2022] Open
Abstract
The present study reported for the first time covalent immobilization of protocatechuate 3,4-dioxygenase (3,4-POD) onto functionalized multi-walled carbon nanotubes (F-MWCNT) for degrading the toxic 3,4-dihydroxybenzoic acid (3,4-DHBA) pollutant in water. The F-MWCNTs had a maximum 3,4-POD loading of 1060 μg/mg. Immobilized 3,4 POD had 44% of relative structural changes to its free configurations. Nevertheless, >90% of relative activity and about 50% of catalytic efficiency were retained to the free enzyme. Immobilized 3,4-POD demonstrated higher alkaline stability and thermostability than the free 3,4-POD. The free and immobilized 3,4-POD lost 82% and 66% of relative activities, respectively after 180 min of incubations at 90 °C. Excellent shelf-life was observed for the immobilized 3,4-POD with residual activity of 56% compared with 41% and 39% of the free 3,4-POD at 4 °C and 25 °C over 30 days storage. Immobilized 3,4-POD showed >60% of catalytic activity retention even after ten-cycle uses, defraying the expenses of free 3,4-POD productions for long term uses. Finally, the immobilized 3,4-POD removed 71% of 3,4-DHBA from water in <4 h, paving its future application for water purification with reduced costs and time.
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Meena SS, Sharma RS, Gupta P, Karmakar S, Aggarwal KK. Isolation and identification of Bacillus megaterium YB3 from an effluent contaminated site efficiently degrades pyrene. J Basic Microbiol 2016; 56:369-78. [PMID: 26755240 DOI: 10.1002/jobm.201500533] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2015] [Accepted: 12/02/2015] [Indexed: 11/07/2022]
Abstract
Industrial effluents contaminated sites may serve as repositories of ecologically adapted efficient pyrene degrading bacteria. In the present study, six bacterial isolates from industrial effluents were purified using serial enrichment technique and their pyrene degrading potential on pyrene supplemented mineral salt medium was assessed. 16S rRNA sequence analysis showed that they belong to four bacterial genera, namely Acinetobacter, Bacillus, Microbacterium, and Ochrobactrum. Among these isolates, Bacillus megaterium YB3 showed considerably good growth and was further evaluated for its pyrene-degrading efficiency. B. megaterium YB3 could degrade 72.44% of 500 mg L(-1) pyrene within 7 days. GC-MS analysis of ethyl acetate extracted fractions detected two relatively less toxic metabolic intermediates of the pyrene degradation pathway. B. megaterium YB3 also tested positive for catechol 1, 2-dioxygenase and aromatic-ring-hydroxylating dioxygenase indole-indigo conversion assays. Considering the ability and efficiency of B. megaterium YB3 to degrade high pyrene content, the strain can be used as a tool to develop bioremediation technologies for the effective biodegradation of pyrene and possibly other PAHs in the environment.
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Affiliation(s)
- Sumer Singh Meena
- University School of Biotechnology, Guru Gobind Singh Indraprastha University, Dwarka, New Delhi, India
| | | | - Priti Gupta
- State Grading Laboratory, Directorate of Agricultural Marketing, Govt. of NCT of Delhi, Delhi, India
| | - Swagata Karmakar
- Department of Environmental Studies, University of Delhi, Delhi, India
| | - Kamal Krishan Aggarwal
- University School of Biotechnology, Guru Gobind Singh Indraprastha University, Dwarka, New Delhi, India
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Abstract
We report the draft genome sequence of Arthrobacter sp. strain Edens01, isolated from a leaf surface of a Rosa hybrid plant as part of the Howard Hughes Medical Institute-funded Student Initiated Microbial Discovery (SIMD) project. The genome has a total size of 3,639,179 bp and contig N50 of 454,897 bp.
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Characterization of a protocatechuate catabolic gene cluster in Rhodococcus ruber OA1 involved in naphthalene degradation. ANN MICROBIOL 2015. [DOI: 10.1007/s13213-015-1132-z] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
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19
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Guzik U, Hupert-Kocurek K, Wojcieszyńska D. Immobilization as a strategy for improving enzyme properties-application to oxidoreductases. Molecules 2014; 19:8995-9018. [PMID: 24979403 PMCID: PMC6271243 DOI: 10.3390/molecules19078995] [Citation(s) in RCA: 305] [Impact Index Per Article: 30.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2014] [Revised: 06/13/2014] [Accepted: 06/16/2014] [Indexed: 01/05/2023] Open
Abstract
The main objective of the immobilization of enzymes is to enhance the economics of biocatalytic processes. Immobilization allows one to re-use the enzyme for an extended period of time and enables easier separation of the catalyst from the product. Additionally, immobilization improves many properties of enzymes such as performance in organic solvents, pH tolerance, heat stability or the functional stability. Increasing the structural rigidity of the protein and stabilization of multimeric enzymes which prevents dissociation-related inactivation. In the last decade, several papers about immobilization methods have been published. In our work, we present a relation between the influence of immobilization on the improvement of the properties of selected oxidoreductases and their commercial value. We also present our view on the role that different immobilization methods play in the reduction of enzyme inhibition during biotechnological processes.
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Affiliation(s)
- Urszula Guzik
- University of Silesia in Katowice, Faculty of Biology and Environmental Protection, Department of Biochemistry, Jagiellonska 28, 40-032 Katowice, Poland.
| | - Katarzyna Hupert-Kocurek
- University of Silesia in Katowice, Faculty of Biology and Environmental Protection, Department of Biochemistry, Jagiellonska 28, 40-032 Katowice, Poland.
| | - Danuta Wojcieszyńska
- University of Silesia in Katowice, Faculty of Biology and Environmental Protection, Department of Biochemistry, Jagiellonska 28, 40-032 Katowice, Poland.
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