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Fan Z, Jia W, Du A. UHPLC-Q-Orbitrap-Based Integrated Lipidomics and Proteomics Reveal Propane-1,2-diol Exposure Accelerating Degradation of Lipids via the Allosteric Effect and Reducing the Nutritional Value of Milk. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2023; 71:1178-1189. [PMID: 36598094 DOI: 10.1021/acs.jafc.2c07059] [Citation(s) in RCA: 20] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
The scandal of detecting the flavoring solvent propane-1,2-diol (PD) in milk has brought a crisis to the trust of consumers in the dairy industry, while its deposition and transformation are still indistinct. Pseudo-targeted lipidomics revealed that PD accelerated the degradation of glycerolipid (33,638.3 ± 28.9 to 104,54.2 ± 28.4 mg kg-1), phosphoglyceride (467.4 ± 8.2 to 56.6 ± 4.2 mg kg-1), and sphingolipids (11.4 ± 0.3 to 0.7 ± 0.2 mg kg-1), which extremely decreased the milk quality. Recoveries and relative standard deviations (RSDs) of the established method were 85.0-109.9 and 0.1-14.9%, respectively, indicating that the approach was credible. Protein-lipid interactions demonstrated that 10 proteins originating from fat globules were upregulated significantly and the activities of 7 enzymes related to lipid degradation were improved. Diacylglycerol cholinephosphotransferase was the only enzyme with decreased activity, and the molecular docking results indicated that PD adjusted its activity through regulating the conformation of the active center and weakening the hydrogen bond force between the enzyme and substrate. This study firstly revealed the mechanism of deposition and transformation of PD in milk, which contributed to the knowledge on the milk quality control and provided key indicators to evaluate the adverse risks of PD in dairy products.
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Affiliation(s)
- Zibian Fan
- School of Food and Biological Engineering, Shaanxi University of Science & Technology, Xi'an710021, China
| | - Wei Jia
- School of Food and Biological Engineering, Shaanxi University of Science & Technology, Xi'an710021, China
- Shaanxi Research Institute of Agricultural Products Processing Technology, Xi'an710021, China
| | - An Du
- School of Food and Biological Engineering, Shaanxi University of Science & Technology, Xi'an710021, China
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Askari H, Rahimian A, Aminian M. Purification and Biochemical Characterization of Two Anionic Peroxidase Isoenzymes from Raphanus sativus L. var niger Roots. Appl Biochem Biotechnol 2022; 194:2219-2235. [DOI: 10.1007/s12010-021-03736-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2021] [Accepted: 10/21/2021] [Indexed: 11/29/2022]
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Pavani P, Kumar K, Rani A, Venkatesu P, Lee MJ. The influence of sodium phosphate buffer on the stability of various proteins: Insights into protein-buffer interactions. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2021.115753] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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Huang A, Wei B, Mo J, Wang Y, Ma L. Conformation and activity alteration of horseradish peroxidase induced by the interaction with gene carrier polyethyleneimines. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2018; 188:90-98. [PMID: 28697412 DOI: 10.1016/j.saa.2017.06.046] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/30/2016] [Revised: 06/06/2017] [Accepted: 06/30/2017] [Indexed: 06/07/2023]
Abstract
Polyethyleneimine (PEI) has long been considered as "golden standard" for polymeric gene delivery carriers. However the molecular basis of the cytotoxicity of PEI is poorly understood. Little is known about the effects of PEI on the structure and functions of biomacromolecules. In this work, fluorescence, UV-vis absorption, circular dichroism spectroscopy were conducted to investigate the influence of PEI of average molecular weight 25, 10 and 1.8kDa (denoted as PEI25k, PEI10k and PEI1.8k) on the conformation of horseradish peroxidase (HRP) and its catalytic efficiency. Zeta-potential measurement and isothermal titration calorimetry were used to reveal the mechanism of the interaction between PEIs and HRP. PEIs were found to bind onto the surface of HRP predominantly via hydrophobic interaction and hydrogen bond or van der Waals interaction. The complex formation between HRP and PEI induced a more compact conformation of the enzyme and an increased hydrophobicity of the microenvironment surrounding heme pocket. The conformational change of HRP had little impact on the affinity towards H2O2 and phenol. However, the increase in the non-planarity of porphyrin ring in the heme group led to an increase in the exposure degree of the active center and thus an enhancement of catalytic efficiency of HRP in the presence of high molecular weight PEIs (PEI25k and PEI10k). The polymer size played an important role in PEI-HRP interaction. PEI of low molecular weight (PEI1.8k) was less efficient to alter the conformation and catalytic activity of HRP in aqueous solutions.
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Affiliation(s)
- Aimin Huang
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, PR China
| | - Bangzhi Wei
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, PR China
| | - Junyong Mo
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, PR China
| | - Yajing Wang
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, PR China
| | - Lin Ma
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, PR China.
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Cha HJ, Jang DS, Jin KS, Choi KY. Structural analyses combined with small-angle X-ray scattering reveals that the retention of heme is critical for maintaining the structure of horseradish peroxidase under denaturing conditions. Amino Acids 2017; 49:715-723. [PMID: 28144743 DOI: 10.1007/s00726-016-2372-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2016] [Accepted: 11/23/2016] [Indexed: 11/29/2022]
Abstract
We analyzed the structure of horseradish peroxidase (HRP) under denaturing conditions of 9 M urea or 6 M guanidine hydrochloride (GdnHCl). Far-UV circular dichroism (CD) spectra indicated the existence of native-like secondary structure of holo-HRP in 9 M urea. In addition, slight changes in near-UV and Soret region CD spectra of holo-HRP in 9 M urea suggest that the tertiary structure of holo-HRP and the binding of heme remain partially intact in this condition. A transition in the thermal unfolding transition curve of holo-HRP in 9 M urea indicated the existence of a considerable amount of secondary structure. However, no secondary structure, tertiary structure, or interaction between heme and HRP were observed in holo-HRP in 6 M GdnHCl. Small-angle X-ray scattering indicated that although distal and proximal domains of holo-HRP in 9 M urea might be partially unfolded, the central region that contains the heme might maintain its tertiary structure. Our results suggest that retention of the heme is essential for maintenance of the structure of HRP under highly denaturing conditions.
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Affiliation(s)
- Hyung Jin Cha
- Pohang Accelerator Laboratory, Pohang University of Science and Technology (POSTECH), Pohang, Korea
| | - Do Soo Jang
- Department of Life Sciences, POSTECH, Pohang, Korea.,Huons Co., Ltd., Seongnam, Korea
| | - Kyeong Sik Jin
- Pohang Accelerator Laboratory, Pohang University of Science and Technology (POSTECH), Pohang, Korea.
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Deng X, Cao S, Li N, Wu H, Smith TJ, Zong M, Lou W. A magnetic biocatalyst based on mussel-inspired polydopamine and its acylation of dihydromyricetin. CHINESE JOURNAL OF CATALYSIS 2016. [DOI: 10.1016/s1872-2067(15)61045-2] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Miletti T, Di Trani J, Jr Levros LC, Mittermaier A. Conformational plasticity surrounding the active site of NADH oxidase from Thermus thermophilus. Protein Sci 2015; 24:1114-28. [PMID: 25970557 PMCID: PMC4500311 DOI: 10.1002/pro.2693] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2015] [Accepted: 04/26/2015] [Indexed: 11/08/2022]
Abstract
Biotechnological applications of enzymes can involve the use of these molecules under nonphysiological conditions. Thus, it is of interest to understand how environmental variables affect protein structure and dynamics and how this ultimately modulates enzyme function. NADH oxidase (NOX) from Thermus thermophilus exemplifies how enzyme activity can be tuned by reaction conditions, such as temperature, cofactor substitution, and the addition of cosolutes. This enzyme catalyzes the oxidation of reduced NAD(P)H to NAD(P)(+) with the concurrent reduction of O2 to H2O2, with relevance to biosensing applications. It is thermophilic, with an optimum temperature of approximately 65°C and sevenfold lower activity at 25°C. Moderate concentrations (≈1M) of urea and other chaotropes increase NOX activity by up to a factor of 2.5 at room temperature. Furthermore, it is a flavoprotein that accepts either FMN or the much larger FAD as cofactor. We have used nuclear magnetic resonance (NMR) titration and (15)N spin relaxation experiments together with isothermal titration calorimetry to study how NOX structure and dynamics are affected by changes in temperature, the addition of urea and the substitution of the FMN cofactor with FAD. The majority of signals from NOX are quite insensitive to changes in temperature, cosolute addition, and cofactor substitution. However, a small cluster of residues surrounding the active site shows significant changes. These residues are implicated in coupling changes in the solution conditions of the enzyme to changes in catalytic activity.
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Affiliation(s)
- Teresa Miletti
- Department of Chemistry, McGill UniversityMontreal, Quebec, H3A 0B8
| | - Justin Di Trani
- Department of Chemistry, McGill UniversityMontreal, Quebec, H3A 0B8
| | - Louis-Charles Jr Levros
- Laboratoire de biologie moléculaire, Département des Sciences Biologiques, Centre BioMed, Université du Québec à MontréalMontréal, Québec, H3C 3P8
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McDonald AG, Tipton KF. Effects of tyramine and 4-aminophenol on the oscillating peroxidase-oxidase reaction. J Phys Chem B 2014; 118:18-25. [PMID: 24351130 DOI: 10.1021/jp406707s] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The peroxidase-oxidase oscillator, a model of biological oscillations, is usually studied in conjunction with the effector molecule, 2,4-dichlorophenol. In this account, we present evidence of the effects of a naturally occurring phenol, tyramine, on the reaction, and also those of the structurally similar 4-aminophenol. Whereas 2,4-dichlorophenol gives rise to sustained oscillations at 40 μM, it was discovered that tyramine promotes damped oscillations at a concentration of 120 μM. Oxidation of NADH was completely inhibited by 4-aminophenol and ascorbate. In separate experiments, the peroxidase-catalyzed ring coupling of tyramine and 4-aminophenol was observed, which in the case of tyramine, may provide an explanation for the damping of oscillations.
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Affiliation(s)
- Andrew G McDonald
- School of Biochemistry and Immunology, Trinity College , Dublin 2, Ireland
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Lin JL, Wheeldon I. Kinetic Enhancements in DNA–Enzyme Nanostructures Mimic the Sabatier Principle. ACS Catal 2013. [DOI: 10.1021/cs300766d] [Citation(s) in RCA: 70] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Jyun-Liang Lin
- Department of Chemical and Environmental Engineering, University of California, Riverside, Bourns Hall, 900
University Avenue,
Riverside, CA 92521, United States
| | - Ian Wheeldon
- Department of Chemical and Environmental Engineering, University of California, Riverside, Bourns Hall, 900
University Avenue,
Riverside, CA 92521, United States
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Schwarz M, Pahlow S, Bocklitz T, Steinbrücker C, Cialla D, Weber K, Popp J. Convenient detection of E. coli in Ringer's solution. Analyst 2013; 138:5866-70. [DOI: 10.1039/c3an01240a] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Zakharova GS, Uporov IV, Tishkov VI. Horseradish peroxidase: modulation of properties by chemical modification of protein and heme. BIOCHEMISTRY (MOSCOW) 2012; 76:1391-401. [PMID: 22339595 DOI: 10.1134/s0006297911130037] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Horseradish peroxidase (HRP) is one of the most studied enzymes of the plant peroxidase superfamily. HRP is also widely used in different bioanalytical applications and diagnostic kits. The methods of genetic engineering and protein design are now widely used to study the catalytic mechanism and to improve properties of the enzyme. Here we review the results of another approach to HRP modification-through the chemical modification of amino acids or prosthetic group of the enzyme. Computer models of HRPs with modified hemes are in good agreement with the experimental data.
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Affiliation(s)
- G S Zakharova
- Bach Institute of Biochemistry, Russian Academy of Sciences, Moscow, Russia
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Phosphate buffer effects on thermal stability and H2O2-resistance of horseradish peroxidase. Int J Biol Macromol 2011; 48:566-70. [DOI: 10.1016/j.ijbiomac.2011.01.021] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2010] [Revised: 01/23/2011] [Accepted: 01/24/2011] [Indexed: 11/18/2022]
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La Rotta H CE, Ciniciato GPMK, González ER. Triphenylmethane dyes, an alternative for mediated electronic transfer systems in glucose oxidase biofuel cells. Enzyme Microb Technol 2011; 48:487-97. [PMID: 22113021 DOI: 10.1016/j.enzmictec.2011.02.003] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2010] [Revised: 01/21/2011] [Accepted: 02/07/2011] [Indexed: 11/27/2022]
Abstract
The bioelectrochemical behavior of three triphenylmethane (TPM) dyes commonly used as pH indicators, and their application in mediated electron transfer systems for glucose oxidase bioanodes in biofuel cells was investigated. Bromophenol Blue, Bromothymol Blue, Bromocresol Green were compared bioelectrochemically against two widely used mediators, benzoquinone and ferrocene carboxy aldehyde. Biochemical studies were performed in terms of enzymatic oxidation, enzyme affinity, catalytic efficiency and co-factor regeneration. The different features of the TPM dyes as mediators are determined by the characteristics in the oxidation/reduction processes studied electrochemically. The reversibility of the oxidation/reduction processes was also established through the dependence of the voltammetric peaks with the sweep rates. All three dyes showed good performances compared to the FA and BQ when evaluated in a half enzymatic fuel cell. Potentiodynamic and power response experiments showed maxima power densities of 32.8 μW cm(-2) for ferrocene carboxy aldehyde followed by similar values obtained for TPM dyes around 30 μW cm(-2) using glucose and mediator concentrations of 10 mmol L(-1) and 1.0 mmol L(-1), respectively. Since no mediator consumption was observed during the bioelectrochemical process, and also good redox re-cycled processes were achieved, the use of triphenylmethane dyes is considered to be promising compared to other mediated systems used with glucose oxidase bioanodes and/or biofuel cells.
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Affiliation(s)
- Camilo E La Rotta H
- Electrochemistry Group, Department of Physical-chemistry, Institute of Chemistry of São Carlos, University of São Paulo, Brazil.
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Watanabe L, de Moura PR, Bleicher L, Nascimento AS, Zamorano LS, Calvete JJ, Sanz L, Pérez A, Bursakov S, Roig MG, Shnyrov VL, Polikarpov I. Crystal structure and statistical coupling analysis of highly glycosylated peroxidase from royal palm tree (Roystonea regia). J Struct Biol 2009; 169:226-42. [PMID: 19854274 DOI: 10.1016/j.jsb.2009.10.009] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2009] [Revised: 10/10/2009] [Accepted: 10/16/2009] [Indexed: 11/15/2022]
Abstract
Royal palm tree peroxidase (RPTP) is a very stable enzyme in regards to acidity, temperature, H(2)O(2), and organic solvents. Thus, RPTP is a promising candidate for developing H(2)O(2)-sensitive biosensors for diverse applications in industry and analytical chemistry. RPTP belongs to the family of class III secretory plant peroxidases, which include horseradish peroxidase isozyme C, soybean and peanut peroxidases. Here we report the X-ray structure of native RPTP isolated from royal palm tree (Roystonea regia) refined to a resolution of 1.85A. RPTP has the same overall folding pattern of the plant peroxidase superfamily, and it contains one heme group and two calcium-binding sites in similar locations. The three-dimensional structure of RPTP was solved for a hydroperoxide complex state, and it revealed a bound 2-(N-morpholino) ethanesulfonic acid molecule (MES) positioned at a putative substrate-binding secondary site. Nine N-glycosylation sites are clearly defined in the RPTP electron-density maps, revealing for the first time conformations of the glycan chains of this highly glycosylated enzyme. Furthermore, statistical coupling analysis (SCA) of the plant peroxidase superfamily was performed. This sequence-based method identified a set of evolutionarily conserved sites that mapped to regions surrounding the heme prosthetic group. The SCA matrix also predicted a set of energetically coupled residues that are involved in the maintenance of the structural folding of plant peroxidases. The combination of crystallographic data and SCA analysis provides information about the key structural elements that could contribute to explaining the unique stability of RPTP.
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Affiliation(s)
- Leandra Watanabe
- Instituto de Física de São Carlos, Departamento de Física e Informática, Universidade de São Paulo, Avenida Trabalhador São Carlense 400, CEP 13566-590 São Carlos, SP, Brazil
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