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Navaneetha Pandiyaraj K, Vasu D, Raji A, Ghobeira R, Saadat Esbah Tabaei P, De Geyter N, Morent R, Ramkumar M, Pichumani M, Deshmukh R. Combined effects of direct plasma exposure and pre-plasma functionalized metal-doped graphene oxide nanoparticles on wastewater dye degradation. J IND ENG CHEM 2023. [DOI: 10.1016/j.jiec.2023.02.020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/29/2023]
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Raji A, Vasu D, Pandiyaraj KN, Ghobeira R, De Geyter N, Morent R, Misra VC, Ghorui S, Pichumani M, Deshmukh RR, Nadagouda MN. Combinatorial effects of non-thermal plasma oxidation processes and photocatalytic activity on the inactivation of bacteria and degradation of toxic compounds in wastewater. RSC Adv 2022; 12:14246-14259. [PMID: 35558835 PMCID: PMC9093588 DOI: 10.1039/d1ra09337a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2021] [Accepted: 04/11/2022] [Indexed: 12/01/2022] Open
Abstract
The simultaneous presence of hazardous chemicals and pathogenic microorganisms in wastewater is tremendously endangering the environment and human health. Therefore, developing a mitigation strategy for adequately degrading toxic compounds and inactivating/killing microorganisms is urgently needed to protect ecosystems. In this paper, the synergetic effects of the photocatalytic activity of TiO2 and Cu–TiO2 nanoparticles (NPs) and the oxidation processes of non-thermal atmospheric pressure plasma (NTAPP) were comprehensively investigated for both the inactivation/killing of common water contaminating bacteria (Escherichia coli (E. coli)) and the degradation of direct textile wastewater (DTW). The photocatalytic NPs were synthesized using the hydrothermal method and further characterized employing field emission scanning electron microscopy (FESEM), X-ray diffraction (XRD), ultraviolet-visible diffuse reflection spectroscopy (UV-Vis DRS) and photoluminescence (PL). Results revealed the predominant presence of the typical anatase phase for both the flower-like TiO2 and the multipod-like Cu–TiO2 structures. UV-Vis DRS and PL analyses showed that the addition of Cu dopants reduced the bandgap and increased oxygen defect vacancies of TiO2. The inactivation of E. coli in suspension and degradation of DTW were then examined upon treating the aqueous media with various plasma alone and plasma/NPs conditions (Ar plasma, Ar + O2 plasma and Ar + N2 plasma, Ar plasma + TiO2 NPs and Ar plasma + Cu–TiO2 NPs). Primary and secondary excited species such as OH˙, O, H and N2* generated in plasma during the processes were recognized by in situ optical emission spectrometry (OES) measurements. Several other spectroscopic analyses were further employed to quantify some reactive oxygen species (ROS) such as OH, H2O2 and O3 generated during the processes. Moreover, the changes in the pH and electrical conductivity (EC) of the solutions were also assessed. The inactivation of bacteria was examined by the colony-forming unit (CFU) method after plating the treated suspensions on agar, and the degradation of organic compounds in DTW was further validated by measuring the total organic carbon (TOC) removal efficiency. All results collectively revealed that the combinatorial plasma-photocatalysis strategy involving Cu–TiO2 NPs and argon plasma jet produced higher concentrations of ROS and proved to be a promising one-step wastewater treatment effectively killing microorganisms and degrading toxic organic compounds. Contamination of water is a serious issue across the world. The proposed plasma synergetic treat has great potential to treat contaminated water in an environmentally friendly way.![]()
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Affiliation(s)
- A Raji
- Research Division of Plasma Processing (RDPP), Department of Physics, Sri Shakthi Institute of Engineering and Technology Coimbatore 641062 India +91-8012097173
| | - D Vasu
- Research Division of Plasma Processing (RDPP), Department of Physics, Sri Shakthi Institute of Engineering and Technology Coimbatore 641062 India +91-8012097173
| | - K Navaneetha Pandiyaraj
- Department of Physics, Sri Ramakrishna Mission Vidyalaya College of Arts and Science Coimbatore-641020 India
| | - Rouba Ghobeira
- Research Unit Plasma Technology (RUPT), Department of Applied Physics, Faculty of Engineering and Architecture, Ghent University Ghent 9000 Belgium
| | - Nathalie De Geyter
- Research Unit Plasma Technology (RUPT), Department of Applied Physics, Faculty of Engineering and Architecture, Ghent University Ghent 9000 Belgium
| | - Rino Morent
- Research Unit Plasma Technology (RUPT), Department of Applied Physics, Faculty of Engineering and Architecture, Ghent University Ghent 9000 Belgium
| | | | - S Ghorui
- Laser and Plasma Technology Division, Bhabha Atomic Research Centre Trombay Mumbai-400085 India
| | - M Pichumani
- Department of Nanoscience and Technology, Sri Ramakrishna Engineering College Coimbatore-641022 India
| | - R R Deshmukh
- Department of Physics, Institute of Chemical Technology Matunga Mumbai India
| | - Mallikarjuna N Nadagouda
- Department of Mechanical and Materials Engineering, Wright State University Dayton Ohio 45435 USA
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Navaneetha Pandiyaraj K, Vasu D, Kandavelu V, Pichumani M, Yugeswaran S, Deshmukh R. Degradation of isothiazolin‐3‐one’s from an aqueous solution via a multi‐pin non‐thermal atmospheric pressure plasma and its toxicity analysis. J FOOD PROCESS PRES 2022. [DOI: 10.1111/jfpp.16461] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Affiliation(s)
- K. Navaneetha Pandiyaraj
- Department of Physics Sri Ramakrishna Mission Vidyalaya College of Arts and Science Coimbatore‐641020 India
| | - D. Vasu
- Research Division of Plasma Processing (RDPP) Department of Physics Sri Shakthi Institute of Engineering and Technology Coimbatore 641062 India
| | - V. Kandavelu
- Department of Chemistry Sri Ramakrishna Mission Vidyalaya College of Arts and Science Coimbatore‐641020 India
| | - M. Pichumani
- Department of Nanoscience and Technology Sri Ramakrishna Engineering College Coimbatore‐641022 India
| | - S. Yugeswaran
- Department of Physics Pondicherry University Puducherry 605014 India
| | - R.R. Deshmukh
- Department of Physics Institute of Chemical Technology Matunga Mumbai 400019 India
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Pandiyaraj KN, Vasu D, Ghobeira R, Tabaei PSE, De Geyter N, Morent R, Pichumani M, Padmanabhanan PVA, Deshmukh RR. Dye wastewater degradation by the synergetic effect of an atmospheric pressure plasma treatment and the photocatalytic activity of plasma-functionalized Cu‒TiO 2 nanoparticles. J Hazard Mater 2021; 405:124264. [PMID: 33153792 DOI: 10.1016/j.jhazmat.2020.124264] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/10/2020] [Revised: 10/09/2020] [Accepted: 10/09/2020] [Indexed: 06/11/2023]
Abstract
In this paper, the photocatalytic activity of plasma-functionalized Cu-doped TiO2 nanoparticles (NPs) and the oxidization process of atmospheric pressure plasma jet were combined for the degradation of reactive red-198 (RR-198) in aqueous solution. The first part of the study was thus devoted to subject Cu-‒TiO2 NPs synthetized by the sol-gel method to various plasma treatments operating in air, argon, oxygen and nitrogen to improve their degradation efficiency. The physicochemical properties of the NPs were then assessed by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and scanning electron microscopy (SEM) measurements. XRD results indicated the predominant presence of the anatase phase which is the most photoactive form of TiO2. The XPS analysis revealed that the different plasma treatments triggered the formation of oxygen vacancies, Ti3+ oxidation state and Cu2+ oxidation state on the surface of Cu-‒TiO2 NPs. These changes, known to prevent the recombination of electron-hole pair, have led to a reduction in the bandgap that was more pronounced for the N2 plasma-treated NPs. The second part of the paper explored the actual degradation of RR-198 in aqueous solution by an Ar plasma treatment alone or combined with the plasma pre-treated Cu-‒TiO2 NPs. Optical emission spectroscopy (OES) and spectrophotometric analyses showed that the synergetic effect of Ar plasma and N2 plasma-treated NPs produced the highest concentration of OH• radicals and H2O2 species which led to the highest RR-198 degradation efficiency. This was further confirmed by pH, electrical conductivity and total organic carbon (TOC) removal measurements. The degradation of RR-198 was determined using UV-Vis spectroscopy and high-performance liquid chromatography (HPLC). Overall, it can be concluded that plasma-assisted processes illustrated by a combination of a direct plasma treatment with plasma-functionalized Cu-‒TiO2 NPs can be used in various textile and pharmaceutical industries as a highly effective treatment of their effluents before discharging.
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Affiliation(s)
- K Navaneetha Pandiyaraj
- Research Division of Plasma Processing (RDPP), Department of Physics, Sri Shakthi Institute of Engineering and Technology, Coimbatore 641062, India.
| | - D Vasu
- Research Division of Plasma Processing (RDPP), Department of Physics, Sri Shakthi Institute of Engineering and Technology, Coimbatore 641062, India
| | - Rouba Ghobeira
- Research Unit Plasma Technology (RUPT), Department of Applied Physics, Faculty of Architecture and Engineering, Ghent University, Sint Pietersnieuwstraat 41 B4, Ghent 9000, Belgium
| | - Parinaz Saadat Esbah Tabaei
- Research Unit Plasma Technology (RUPT), Department of Applied Physics, Faculty of Architecture and Engineering, Ghent University, Sint Pietersnieuwstraat 41 B4, Ghent 9000, Belgium
| | - Nathalie De Geyter
- Research Unit Plasma Technology (RUPT), Department of Applied Physics, Faculty of Architecture and Engineering, Ghent University, Sint Pietersnieuwstraat 41 B4, Ghent 9000, Belgium
| | - Rino Morent
- Research Unit Plasma Technology (RUPT), Department of Applied Physics, Faculty of Architecture and Engineering, Ghent University, Sint Pietersnieuwstraat 41 B4, Ghent 9000, Belgium
| | - M Pichumani
- Department of Nanoscience and Technology, Sri Ramakrishna Engineering College, Coimbatore 641022, India
| | | | - R R Deshmukh
- Department of Physics, Institute of Chemical Technology, Matunga, Mumbai 400019, India
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Navaneetha Pandiyaraj K, Vasu D, Ramkumar M, Deshmukh R, Ghobeira R. Improved degradation of textile effluents via the synergetic effects of Cu-CeO2 catalysis and non-thermal atmospheric pressure plasma treatment. Sep Purif Technol 2021. [DOI: 10.1016/j.seppur.2020.118037] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Vasu D, Navaneetha Pandiyaraj K, Padmanabhan PVA, Pichumani M, Deshmukh RR, Jaganathan SK. Degradation of simulated Direct Orange-S (DO-S) textile effluent using nonthermal atmospheric pressure plasma jet. Environ Geochem Health 2021; 43:649-662. [PMID: 31679080 DOI: 10.1007/s10653-019-00446-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/02/2019] [Accepted: 10/09/2019] [Indexed: 06/10/2023]
Abstract
One of the major environmental issues of textile industries is the discharge of large quantities of textile effluents, which are source of contamination of water bodies on surface of earth and quality of groundwater. The effluents are toxic, non-biodegradable, carcinogenic and prodigious threats to human and aquatic creatures. Since textile effluents can be treated efficiently and effectively by various advanced oxidation processes (AOPs). Among the various AOPs, cold atmospheric pressure plasma is a promising method among many prominent techniques available to treat the effluents. In this paper, we report about the degradation of simulated effluent, namely Direct Orange-S (DO-S) aqueous solution, using nonthermal atmospheric pressure plasma jet. The plasma treatment of DO-S aqueous solution was carried out as a function of various operating parameters such as potential and treatment time. The change in properties of treated DO-S dye was investigated by means of various analytical techniques such as high-performance liquid chromatography, UV-visible (UV-Vis) spectroscopy and determination of total organic content (TOC). The reactive species present in the samples were identified using optical emission spectrometry (OES). OES results confirmed that the formation of reactive oxygen and nitrogen species during the plasma treatment in the liquid surface was responsible for dye oxidation and degradation. Degradation efficiency, as monitored by color removal efficiency, of 96% could be achieved after 1 h of treatment. Concurrently, the TOC values were found to decrease with plasma treatment, implying that the plasma treatment process enhanced the non-toxicity nature of DO-S aqueous solution. Toxicity of the untreated and plasma-treated dye solution samples was studied using Escherichia coli (E. coli) and Staphylococcus (S. aureus) organisms, which demonstrated that the plasma-treated dye solution was non-toxic in nature compared with untreated one.
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Affiliation(s)
- D Vasu
- Research Division of Plasma Processing (RDPP), Department of Physics, Sri Shakthi Institute of Engineering and Technology, L&T Bypass, Chinniyam Palayam (Post), Coimbatore, 641062, India
| | - K Navaneetha Pandiyaraj
- Research Division of Plasma Processing (RDPP), Department of Physics, Sri Shakthi Institute of Engineering and Technology, L&T Bypass, Chinniyam Palayam (Post), Coimbatore, 641062, India.
| | - P V A Padmanabhan
- Research Division of Plasma Processing (RDPP), Department of Physics, Sri Shakthi Institute of Engineering and Technology, L&T Bypass, Chinniyam Palayam (Post), Coimbatore, 641062, India
| | - M Pichumani
- Department of Nanoscience and Nanotechnology, Sri Ramakrishna Engineering College, Coimbatore, 641022, India
| | - R R Deshmukh
- Department of Physics, Institute of Chemical Technology, Matunga, Mumbai, 400019, India
| | - S K Jaganathan
- Department of Engineering, Faculty of Science and Engineering, University of Hull, Hull, HU6 7RX, UK
- IJNUTM Cardiovascular Engineering Centre, School of Biomedical Engineering and Health Science, Faculty of Engineering, Universiti Teknologi Malaysia, Skudai, 81310, Malaysia
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Raji A, Pandiyaraj KN, Vasu D, Ramkumar MC, Deshmukh RR, Kandavelu V. Non-equilibrium atmospheric pressure plasma assisted degradation of the pharmaceutical drug valsartan: influence of catalyst and degradation environment. RSC Adv 2020; 10:35709-35717. [PMID: 35517122 PMCID: PMC9056945 DOI: 10.1039/d0ra05608a] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2020] [Accepted: 09/07/2020] [Indexed: 11/21/2022] Open
Abstract
This paper investigated the degradation of the pharmaceutical drug Valsartan (VS) using non-equilibrium atmospheric pressure plasma (NEAPP) with various operating conditions. The heterogeneous photocatalyst ZnO nanoparticles (NP's) were synthesized using a hydrothermal process. The morphology, chemical composition and structure of as-synthesized ZnO NPs were examined by Field Emission Scanning Electron Microscopy (FE-SEM), Fourier Transform Infrared Spectroscopy (FTIR) and X-ray diffraction (XRD) analysis. Then, VS degradation was examined in three subsequent treatment conditions including plasma treatment alone, the combination of plasma with as-prepared ZnO NPs and various environments (air, oxygen and hydrogen peroxide) at fixed plasma operating potential and treatment time. The degradation efficiency of plasma-treated VS by various conditions was observed using UV-visible spectroscopy. Optical Emission Spectrometry (OES) was used to characterize the distribution and emission intensity of various reactive species (OH˙, N2-SPS and O) during the degradation processes which plays a vital role in the degradation of VS. The role of OH˙ and H2O2 during the degradation process was further examined by chemical dosimetry and spectroscopic techniques. Furthermore, pH, conductivity and TOC of the untreated and plasma-treated VS were also investigated. The results on the degradation of VS showed that plasma treatment combined with ZnO NP's has a significant effect on degradation of molecules of VS than degradation processes carried out by other experimental conditions due to the formation of higher concentrations of various reactive oxygen and nitrogen species during the degradation processes.
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Affiliation(s)
- A Raji
- Department of Chemistry, Sri Shakthi Institute of Engineering and Technology Coimbatore 641062 India.,Research Division of Plasma Processing (RDPP), Department of Physics, Sri Shakthi Institute of Engineering and Technology Coimbatore 641062 India +91-9786452504
| | - K Navaneetha Pandiyaraj
- Research Division of Plasma Processing (RDPP), Department of Physics, Sri Shakthi Institute of Engineering and Technology Coimbatore 641062 India +91-9786452504
| | - D Vasu
- Research Division of Plasma Processing (RDPP), Department of Physics, Sri Shakthi Institute of Engineering and Technology Coimbatore 641062 India +91-9786452504
| | - M C Ramkumar
- Department of Physics, School of Basic Sciences, Vels Institute of Science, Technology and Advanced Studies Chennai India
| | - R R Deshmukh
- Department of Physics, Institute of Chemical Technology Matunga Mumbai 400019 India
| | - V Kandavelu
- Department of Chemistry, Sri Shakthi Institute of Engineering and Technology Coimbatore 641062 India
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Prasad UV, Vasu D, Gowtham RR, Pradeep CK, Swarupa V, Yeswanth S, Choudhary A, Sarma PVGK. Cloning, Expression and Characterization of NAD Kinase from Staphylococcus aureus Involved in the Formation of NADP (H): A Key Molecule in the Maintaining of Redox Status and Biofilm Formation. Adv Biomed Res 2017; 6:97. [PMID: 28828348 PMCID: PMC5549544 DOI: 10.4103/2277-9175.211833] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Abstract
BACKGROUND Staphylococcus aureus has the ability to form biofilms on any niches, a key pathogenic factor of this organism and this phenomenon is directly related to the concentration of NADPH. The formation of NADP is catalyzed by NAD kinase (NADK) and this gene of S. aureus ATCC 12600 was cloned, sequenced, expressed and characterized. MATERIALS AND METHODS The NADK gene was polymerase chain reaction amplified from the chromosomal DNA of S. aureus ATCC 12600 and cloned in pQE 30 vector, sequenced and expressed in Escherichia coli DH5α. The pure protein was obtained by passing through nickel metal chelate agarose column. The enzyme kinetics of the enzyme and biofilm assay of the S. aureus was carried out in both aerobic and anaerobic conditions. The kinetics was further confirmed by the ability of the substrates to dock to the NADK structure. RESULTS The recombinant NADK exhibited single band with a molecular weight of 31kDa in sodium dodecyl sulfate-polyacrylamide gel electrophoresis and the gene sequence (GenBank: JN645814) revealed presence of only one kind of NADK in all S. aureus strains. The enzyme exhibited very high affinity for NAD compared to adenosine triphosphate concurring with the docking results. A root-mean-square deviation value 14.039Å observed when NADK structure was superimposed with its human counterpart suggesting very low homology. In anaerobic conditions, higher biofilm units were found with decreased NADK activity. CONCLUSION The results of this study suggest increased NADPH concentration in S. aureus plays a vital role in the biofilm formation and survival of this pathogen in any environmental conditions.
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Affiliation(s)
- U Venkateswara Prasad
- Department of Biotechnology, Sri Venkateswara Institute of Medical Sciences, Tirupati, Andhra Pradesh, India
| | - D Vasu
- Department of Biotechnology, Sri Venkateswara Institute of Medical Sciences, Tirupati, Andhra Pradesh, India
| | - R Rishi Gowtham
- Department of Biotechnology, Sri Venkateswara Institute of Medical Sciences, Tirupati, Andhra Pradesh, India
| | - Ch Krishna Pradeep
- Department of Biotechnology, Sri Venkateswara Institute of Medical Sciences, Tirupati, Andhra Pradesh, India
| | - V Swarupa
- Department of Biotechnology, Sri Venkateswara Institute of Medical Sciences, Tirupati, Andhra Pradesh, India
| | - S Yeswanth
- Department of Biotechnology, Sri Venkateswara Institute of Medical Sciences, Tirupati, Andhra Pradesh, India
| | - Abhijit Choudhary
- Department of Microbiology, Sri Venkateswara Institute of Medical Sciences, Tirupati, Andhra Pradesh, India
| | - P V G K Sarma
- Department of Biotechnology, Sri Venkateswara Institute of Medical Sciences, Tirupati, Andhra Pradesh, India
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Vasu D, Sunitha MM, Srikanth L, Swarupa V, Prasad UV, Sireesha K, Yeswanth S, Kumar PS, Venkatesh K, Chaudhary A, Sarma PVGK. In Staphylococcus aureus the regulation of pyruvate kinase activity by serine/threonine protein kinase favors biofilm formation. 3 Biotech 2015; 5:505-512. [PMID: 28324552 PMCID: PMC4522715 DOI: 10.1007/s13205-014-0248-3] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2014] [Accepted: 08/26/2014] [Indexed: 11/30/2022] Open
Abstract
Staphylococcus aureus, a natural
inhabitant of nasopharyngeal tract, survives mainly as biofilms. Previously we have observed that S. aureus ATCC 12600 grown under anaerobic conditions exhibited high rate of biofilm formation and l-lactate dehydrogenase activity. Thus, the concentration of pyruvate plays a critical role in S. aureus, which is primarily catalyzed by pyruvate kinase (PK). Analyses of the PK gene sequence (JN645815) revealed presence of PknB site in PK gene indicating that phosphorylation may be influencing the functioning of PK. To establish this hypothesis the pure enzymes of S. aureus ATCC 12600 were obtained by expressing these genes in PK 1 and PV 1 (JN695616) clones and passing the cytosolic fractions through nickel metal chelate column. The molecular weights of pure recombinant PK and PknB are 63 and 73 kDa, respectively. The enzyme kinetics of pure PK showed KM of 0.69 ± 0.02 µM, while the KM of PknB for stpks (stpks = NLCNIPCSALLSSDITASVNCAK) substrate was 0.720 ± 0.08 mM and 0.380 ± 0.07 mM for autophosphorylation. The phosphorylated PK exhibited 40 % reduced activity (PK = 0.2 ± 0.015 μM NADH/min/ml to P-PK = 0.12 ± 0.01 μM NADH/min/ml). Elevated synthesis of pyruvate kinase was observed in S. aureus ATCC 12600 grown in anaerobic conditions suggesting that the formed pyruvate is more utilized in the synthesis phase, supporting increased rate of biofilm formation.
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Affiliation(s)
- D Vasu
- Department of Biotechnology, Sri Venkateswara Institute of Medical Sciences, Tirupati, AP, 517507, India
| | - M M Sunitha
- Department of Biotechnology, Sri Venkateswara Institute of Medical Sciences, Tirupati, AP, 517507, India
| | - L Srikanth
- Department of Biotechnology, Sri Venkateswara Institute of Medical Sciences, Tirupati, AP, 517507, India
| | - V Swarupa
- Department of Biotechnology, Sri Venkateswara Institute of Medical Sciences, Tirupati, AP, 517507, India
| | - U Venkateswara Prasad
- Department of Biotechnology, Sri Venkateswara Institute of Medical Sciences, Tirupati, AP, 517507, India
| | - K Sireesha
- Department of Biotechnology, Sri Venkateswara Institute of Medical Sciences, Tirupati, AP, 517507, India
| | - S Yeswanth
- Department of Biotechnology, Sri Venkateswara Institute of Medical Sciences, Tirupati, AP, 517507, India
| | - P Santhosh Kumar
- Department of Biotechnology, Sri Venkateswara Institute of Medical Sciences, Tirupati, AP, 517507, India
| | - K Venkatesh
- Department of Biotechnology, Sri Venkateswara Institute of Medical Sciences, Tirupati, AP, 517507, India
| | - Abhijit Chaudhary
- Department of Microbiology, Sri Venkateswara Institute of Medical Sciences, Tirupati, AP, 517507, India
| | - P V G K Sarma
- Department of Biotechnology, Sri Venkateswara Institute of Medical Sciences, Tirupati, AP, 517507, India.
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Venkateswara Prasad U, Vasu D, Yeswanth S, Swarupa V, Sunitha MM, Choudhary A, Sarma PVGK. Phosphorylation controls the functioning ofStaphylococcus aureusisocitrate dehydrogenase – favours biofilm formation. J Enzyme Inhib Med Chem 2015; 30:655-61. [DOI: 10.3109/14756366.2014.959945] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Kumar PS, Kumar YN, Prasad UV, Yeswanth S, Swarupa V, Vasu D, Venkatesh K, Srikanth L, Rao VK, Sarma PVGK. Comparative Structural and Functional Analysis of Staphylococcus aureus Glucokinase with other Bacterial Glucokinases. Indian J Pharm Sci 2014; 76:430-6. [PMID: 25425757 PMCID: PMC4243260] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2014] [Revised: 08/18/2014] [Accepted: 08/24/2014] [Indexed: 11/16/2022] Open
Abstract
Glucokinase is classified in bacteria based upon having ATP binding site and 'repressor/open reading frames of unknown function/sugar kinases' motif, the sequence of glucokinase gene (JN645812) of Staphylococcus aureus ATCC12600 showed presence of ATP binding site and 'repressor/open reading frames of unknown function/sugar kinases' motif. We have earlier observed glucokinase of S. aureus has higher affinity towards the substrate compared to other bacterial glucokinase and under anaerobic condition with increased glucose concentration S. aureus exhibited higher rate of biofilm formation. To establish this, 3D structure of glucokinase was built using homology modeling method, the PROCHECK and ProSA-Web analysis indicated this built glucokinase structure was close to the crystal structure. This structure was superimposed with different bacterial glucokinase structures and from the root-mean-square deviation values, it is concluded that S. aureus glucokinase exhibited very close homology with Enterococcus faecalis and Clostridium difficle while with other bacteria it showed high degree of variations both in domain and nondomain regions. Glucose docking results indicated -12.3697 kcal/mol for S. aureus glucokinase compared with other bacterial glucokinase suggesting higher affinity of glucose which correlates with enzyme kinetics and higher rate of biofilm formation.
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Affiliation(s)
- P. S. Kumar
- Department of Biotechnology, Sri Venkateswara Institute of Medical Sciences, Tirupati-517 507, India
| | - Y. N. Kumar
- Department of Zoology, Sri Venkateswara University, Tirupati-517 502, India
| | - U. V. Prasad
- Department of Biotechnology, Sri Venkateswara Institute of Medical Sciences, Tirupati-517 507, India
| | - S. Yeswanth
- Department of Biotechnology, Sri Venkateswara Institute of Medical Sciences, Tirupati-517 507, India
| | - V. Swarupa
- Department of Biotechnology, Sri Venkateswara Institute of Medical Sciences, Tirupati-517 507, India
| | - D. Vasu
- Department of Biotechnology, Sri Venkateswara Institute of Medical Sciences, Tirupati-517 507, India
| | - K. Venkatesh
- Department of Biotechnology, Sri Venkateswara Institute of Medical Sciences, Tirupati-517 507, India
| | - L. Srikanth
- Department of Biotechnology, Sri Venkateswara Institute of Medical Sciences, Tirupati-517 507, India
| | - V. K. Rao
- Department of Pharmacology and Toxicology, University of Kansas, Lawrence, KS 66047, USA
| | - P. V. G. K. Sarma
- Department of Biotechnology, Sri Venkateswara Institute of Medical Sciences, Tirupati-517 507, India
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Prasad UV, Vasu D, Kumar YN, Kumar PS, Yeswanth S, Swarupa V, Phaneendra BV, Chaudhary A, Sarma PVGK. Cloning, expression and characterization of NADP-dependent isocitrate dehydrogenase from Staphylococcus aureus. Appl Biochem Biotechnol 2013; 169:862-9. [PMID: 23288593 DOI: 10.1007/s12010-012-0027-8] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2012] [Accepted: 12/10/2012] [Indexed: 12/01/2022]
Abstract
The Krebs cycle dictates oxidative and reductive conditions in Staphylococcus aureus and is mainly regulated by isocitrate dehydrogenase (IDH) which plays pivotal role in the growth and pathogenesis of the bacteria. In the present study, IDH gene from S. aureus ATCC12600 was cloned in the Sma I site of pQE 30 vector; the resultant clone was named as UVIDH1. The insert in the clone was sequenced (accession number HM067707), and the sequence showed complete homology with IDH sequence of other S. aureus strains reported in the database indicating presence of single enzyme in S. aureus, and considerable sequence homology with other bacteria was observed; however, only 24% homology was found with NADP-dependent human IDH. Phylogenetically, the S. aureus IDH showed close identity with Bacillus subtilis and high degree of variability with other bacteria and human IDH. The expression of IDH in the clone UVIDH1 was induced with 1 mM IPTG, and the recombinant IDH was purified by passing through nickel metal chelate column; the purified recombinant IDH showed a single band in SDS-PAGE with a molecular weight of 40 kDa; K(m) and V(max) for isocitrate are 8.2 ± 0.28 and 525 ± 25 μM NADPH/mg/min, respectively, and for cofactor NADP 67.5 ± 2.82 μM and V(max) 50.5 ± 2.12 μM NADPH/mg/min.
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Affiliation(s)
- U Venkateswara Prasad
- Department of Biotechnology, Sri Venkateswara Institute of Medical Sciences, Tirupati 517507, India
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Sarma P, Yeswanth S, Lalith Kumar CH, Swarupa V, Prasad UV, Vasu D, Kumar YN, Srikanth L, Venkatesh K, Sowjenya G, Kumar PS, Kavya D, Chaudhury A. Characterization of inosine monophosphate dehydrogenase from Staphylococcus aureus ATCC12600 and its involvement in biofilm formation. J Clin Sci Res 2013; 2:203. [DOI: 10.4103/2277-5706.241526] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/19/2023]
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