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Kaffash M, Tolou-Shikhzadeh-Yazdi S, Soleimani S, Hoseinpoor S, Saberi MR, Chamani J. Spectroscopy and molecular simulation on the interaction of Nano-Kaempferol prepared by oil-in-water with two carrier proteins: An investigation of protein-protein interaction. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2024; 309:123815. [PMID: 38154302 DOI: 10.1016/j.saa.2023.123815] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/03/2023] [Revised: 11/28/2023] [Accepted: 12/23/2023] [Indexed: 12/30/2023]
Abstract
In this work, the interaction of human serum albumin (HSA) and human holo-transferrin (HTF) with the prepared Nano-Kaempferol (Nano-KMP) through oil-in-water procedure was investigated in the form of binary and ternary systems by the utilization of different spectroscopy techniques along with molecular simulation and cancer cell experiments. According to fluorescence spectroscopy outcomes, Nano-KMP is capable of quenching both proteins as binary systems by a static mechanism, while in the form of (HSA-HTF) Nano-KMP as the ternary system, an unlinear Stern-Volmer plot was elucidated with the occurrence of both dynamic and static fluorescence quenching mechanisms in the binding interaction. In addition, the two acquired Ksv values in the ternary system signified the existence of two sets of binding sites with two different interaction behaviors. The binding constant values of HSA-Nano KMP, HTF-Nano-KMP, and (HSA-HTF) Nano-KMP complexes formation were (2.54 ± 0.03) × 104, (2.15 ± 0.02) × 104 and (1.43 ± 0.04) × 104M-1at the first set of binding sites and (4.68 ± 0.05) × 104 M-1 at the second set of binding sites, respectively. The data of thermodynamic parameters confirmed the major roles of hydrogen binding and van der Waals forces in the formation of HSA-Nano KMP and HTF-Nano KMP complexes. The thermodynamic parameter values of (HSA-HTF) Nano KMP revealed the dominance of hydrogen binding and van der Waals forces in the first set of binding sites and hydrophobic forces for the second set of binding sites. Resonance light scattering (RLS) analysis displayed the existence of a different interaction behavior for HSA-HTF complex in the presence of Nano-KMP as the ternary system. Moreover, circular dichroism (CD) technique affirmed the conformational changes of the secondary structure of proteins as binary and ternary systems. Molecular docking and molecular dynamics simulations (for 100 ns) were performed to investigate the mechanism of KMP binding to HSA, HTF, and HSA-HTF. Next to observing a concentration and time-dependent cytotoxicity, the down regulation of PI3K/AkT/mTOR pathway resulted in cell cycle arrest in SW480 cells.
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Affiliation(s)
- Maryam Kaffash
- Department of Biology, Mashhad Branch, Islamic Azad University, Mashhad, Iran
| | | | - Samane Soleimani
- Department of Biology, Mashhad Branch, Islamic Azad University, Mashhad, Iran
| | - Saeideh Hoseinpoor
- Department of Biology, Mashhad Branch, Islamic Azad University, Mashhad, Iran
| | - Mohammad Reza Saberi
- Department of Medicinal Chemistry, School of Pharmacy, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Jamshidkhan Chamani
- Department of Biology, Mashhad Branch, Islamic Azad University, Mashhad, Iran.
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2
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Naeemi SM, Aminzadeh S, Sari S, Nemati F, Naseroleslami M. In vitro and in silico characterization of a novel glutamate carboxypeptidase from Cohnella sp. A01. Biochimie 2023; 207:83-95. [PMID: 36493965 DOI: 10.1016/j.biochi.2022.12.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2022] [Revised: 10/25/2022] [Accepted: 12/05/2022] [Indexed: 12/12/2022]
Abstract
Glutamate carboxypeptidase is a bacterial enzyme of metallopeptidase superfamily. This enzyme is an exo-peptidase that catalyzes the hydrolysis of glutamate residues at the C-terminus of folic acid. The rCP302 is a novel zinc ion-dependent recombinant glutamate carboxypeptidase derived from a thermophilic bacterium, Cohnella sp. A01 (PTCC No: 1921). By simulating the structure of rCP302, analyzing its activity in various environmental settings, and contrasting it with that of related enzymes, we wanted to evaluate the heterologous production, purification, and characterization of this enzyme. The bioinformatics study showed that rCP302 had maximum similarity to M20 family of metallopeptidases. The purified rCP302 molecular weight was about 41.6 kDa. The optimum temperature and pH for the catalytic activity of rCP302 were 50 °C and 7.2, respectively. Fluorescence spectroscopy data elucidated the secondary structure of rCP302 and determined conformational changes caused by alterations in ambient conditions. Using folate as a substrate, Km and specific activity values were calculated as 0.108 μM and 687 μmol/min/mg, respectively. The enzyme activity was strongly inhibited when EDTA sequestered zinc ions. The half-life of this enzyme at 30 °C was 2012 min. Regarding the ability of rCP302 to degrade folic acid, and its long half-life at 37 °C, the normal temperature of many mammals, this enzyme can be introduced for further study for use in the pharmaceutical industry.
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Affiliation(s)
- Seyed Mahdi Naeemi
- Department of Molecular and Cellular Sciences, Faculty of Advanced Science and Technology, Tehran Medical Sciences, Islamic Azad University, Tehran, Iran
| | - Saeed Aminzadeh
- Bioprocess Engineering Group, Institute of Industrial and Environmental Biotechnology, National Institute of Genetic Engineering and Biotechnology (NIGEB), Tehran, Iran.
| | - Soyar Sari
- Department of Molecular and Cellular Sciences, Faculty of Advanced Science and Technology, Tehran Medical Sciences, Islamic Azad University, Tehran, Iran
| | - Fahimeh Nemati
- Department of Biotechnoligy, Faculty of Advanced Science and Technology, Tehran Medical Sciences, Islamic Azad University, Tehran, Iran
| | - Maryam Naseroleslami
- Department of Molecular and Cellular Sciences, Faculty of Advanced Science and Technology, Tehran Medical Sciences, Islamic Azad University, Tehran, Iran
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3
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Gerstel M, Koehne I, Reithmaier JP, Pietschnig R, Benyoucef M. Luminescent Properties of Phosphonate Ester-Supported Neodymium(III) Nitrate and Chloride Complexes. MOLECULES (BASEL, SWITZERLAND) 2022; 28:molecules28010048. [PMID: 36615242 PMCID: PMC9822372 DOI: 10.3390/molecules28010048] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/27/2022] [Revised: 12/12/2022] [Accepted: 12/15/2022] [Indexed: 12/24/2022]
Abstract
This study examines the synthesis of two geminal bisphosphonate ester-supported Ln3+ complexes [Ln(L3)2(NO3)3] (Ln = Nd3+ (5), La3+ (6)) and optical properties of the neodymium(III) complex. These results are compared to known mono-phosphonate ester-based Nd3+ complexes [Nd(L1/L2)3X3]n (X = NO3-, n = 1; Cl-, n = 2) (1-4). The optical properties of Nd3+ compounds are determined by micro-photoluminescence (µ-PL) spectroscopy which reveals three characteristic metal-centered emission bands in the NIR region related to transitions from 4F3/2 excited state. Additionally, two emission bands from 4F5/2, 2H9/2 → 4IJ (J = 11/2, 13/2) transitions were observed. PL spectroscopy of equimolar complex solutions in dry dichloromethane (DCM) revealed remarkably higher emission intensity of the mono-phosphonate ester-based complexes in comparison to their bisphosphonate ester congener. The temperature-dependent PL measurements enable assignment of the emission lines of the 4F3/2 → 4I9/2 transition. Furthermore, low-temperature polarization-dependent measurements of the transitions from R1 and R2 Stark sublevel of 4F3/2 state to the 4I9/2 state for crystals of [Nd(L3)2(NO3)3] (5) are discussed.
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Affiliation(s)
- Miriam Gerstel
- Institute of Nanostructure Technologies and Analytics (INA) and CINSaT, University of Kassel, Heinrich-Plett-Str. 40, 34132 Kassel, Germany
| | - Ingo Koehne
- Institute of Chemistry and Center for Interdisciplinary Nanostructure Science and Technology (CINSaT), University of Kassel, Heinrich-Plett-Str. 40, 34132 Kassel, Germany
| | - Johann Peter Reithmaier
- Institute of Nanostructure Technologies and Analytics (INA) and CINSaT, University of Kassel, Heinrich-Plett-Str. 40, 34132 Kassel, Germany
| | - Rudolf Pietschnig
- Institute of Chemistry and Center for Interdisciplinary Nanostructure Science and Technology (CINSaT), University of Kassel, Heinrich-Plett-Str. 40, 34132 Kassel, Germany
| | - Mohamed Benyoucef
- Institute of Nanostructure Technologies and Analytics (INA) and CINSaT, University of Kassel, Heinrich-Plett-Str. 40, 34132 Kassel, Germany
- Correspondence:
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4
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Pourhabib A, Arvand M. Electrochemical Sensing of Tryptophan and Tyrosine in Chronic Kidney Disease Patients Using Magnetic Core/Ag Nanoparticles Shell Nanocomposite Modified Electrode. JOURNAL OF ANALYTICAL CHEMISTRY 2022. [DOI: 10.1134/s1061934822020022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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5
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Probing conformational changes of monomeric transthyretin with second derivative fluorescence. Sci Rep 2019; 9:10988. [PMID: 31358790 PMCID: PMC6662758 DOI: 10.1038/s41598-019-47230-4] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2018] [Accepted: 07/02/2019] [Indexed: 02/06/2023] Open
Abstract
We have studied the intrinsic fluorescence spectra of a monomeric variant of human transthyretin (M-TTR), a protein involved in the transport of the thyroid hormone and retinol and associated with various forms of amyloidosis, extending our analysis to the second order derivative of the spectra. This procedure allowed to identify three peaks readily assigned to Trp41, as the three peaks were also visible in a mutant lacking the other tryptophan (Trp79) and had similar FRET efficiency values with an acceptor molecule positioned at position 10. The wavelength values of the three peaks and their susceptibility to acrylamide quenching revealed that the three corresponding conformers experience different solvent-exposure, polarity of the environment and flexibility. We could monitor the three peaks individually in urea-unfolding and pH-unfolding curves. This revealed changes in the distribution of the corresponding conformers, indicating conformational changes and alterations of the dynamics of the microenvironment that surrounds the associated tryptophan residue in such transitions, but also native-like conformers of such residues in unfolded states. We also found that the amyloidogenic state adopted by M-TTR at mildly low pH has a structural and dynamical microenvironment surrounding Trp41 indistinguishable from that of the fully folded and soluble state at neutral pH.
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Chen N, Di P, Ning S, Jiang W, Jing Q, Ren G, Liu Y, Tang Y, Xu Z, Liu G, Ren F. Modified rivaroxaban microparticles for solid state properties improvement based on drug-protein/polymer supramolecular interactions. POWDER TECHNOL 2019. [DOI: 10.1016/j.powtec.2018.12.085] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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7
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Mokaberi P, Reyhani V, Amiri-Tehranizadeh Z, Saberi MR, Beigoli S, Samandar F, Chamani J. New insights into the binding behavior of lomefloxacin and human hemoglobin using biophysical techniques: binary and ternary approaches. NEW J CHEM 2019. [DOI: 10.1039/c9nj01048c] [Citation(s) in RCA: 80] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Demonstrates the overlap that had been induced between the fluorescence emission spectrum of Hb and the absorption spectrum of drugs, which has proved that there is a high probability to the occurrence of energy transfer from Hb and LMF in the absence and presence of NRF.
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Affiliation(s)
- Parisa Mokaberi
- Department of Biology
- Faculty of Sciences
- Mashhad Branch
- Islamic Azad University
- Mashhad
| | - Vida Reyhani
- Department of Biology
- Faculty of Sciences
- Mashhad Branch
- Islamic Azad University
- Mashhad
| | | | - Mohammad Reza Saberi
- Department of Medical Chemistry
- School of Pharmacy
- Mashhad University of Medical Sciences
- Mashhad
- Iran
| | - Sima Beigoli
- Endoscopic and Minimally Invasive Surgery Research Center
- Mashhad University of Medical Sciences
- Mashhad
- Iran
| | - Farzaneh Samandar
- Department of Biology
- Faculty of Sciences
- Mashhad Branch
- Islamic Azad University
- Mashhad
| | - Jamshidkhan Chamani
- Department of Biology
- Faculty of Sciences
- Mashhad Branch
- Islamic Azad University
- Mashhad
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8
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Pan H, Yu H, Wang Y, Liu R, Lei H. Investigating variations of fluorescent dissolved organic matter in wastewater treatment using synchronous fluorescence spectroscopy combined with principal component analysis and two-dimensional correlation. ENVIRONMENTAL TECHNOLOGY 2018; 39:2495-2502. [PMID: 28726573 DOI: 10.1080/09593330.2017.1357759] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/29/2016] [Accepted: 07/15/2017] [Indexed: 06/07/2023]
Abstract
Synchronous fluorescence spectroscopy (SFS) combined with principal component analysis (PCA) and two-dimensional (2D) correlation was applied to investigate removal efficiencies and variations of dissolved organic matter (DOM) fractions in the wastewater treatment plant (WWTP) with an A2O craft. A decreasing order of total removal efficiencies was tyrosine-like fluorescence component (89.58%) > humic-like fluorescence (HLF) component (39.83%) > tryptophan-like fluorescence component (36.89%) > microbial humic-like fluorescence (HLF) component (12.47%) > fulvic-like fluorescence component (6.37%). The tyrosine-like, tryptophan-like and HLF components were deeply decomposed by anaerobic bacteria in the anaerobic zone. The tyrosine-like component was the preponderant fraction of DOM in the raw water and primary sediment tank. The tyrosine-like component was the dominant component of DOM too in the anaerobic and anoxic zones, but its proportion was slightly more than the tryptophan-like component. The tryptophan-like component was the dominant component in the facultative zone, the oxic zone and the secondary sediment tank. Based on the changing band order of 279 → 304 → 490 → 330 → 380 → 430 nm, the decreasing variation order was tyrosine-like > tryptophan-like > humic-like > microbial humic-like > fulvic-like component. Therefore, the SFS combined with PCA and 2D correlation is an effective tool for not only monitoring the removal of DOM components but also characterizing variations of DOM fractions in the WWTP.
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Affiliation(s)
- Hongwei Pan
- a School of Water Conservancy , North China University of Water Resources and Electric Power , Zhengzhou , People's Republic of China
| | - Huibin Yu
- b State Key Laboratory of Environmental Criteria and Risk Assessment , Chinese Research Academy of Environmental Science , Beijing , People's Republic of China
| | - Yanan Wang
- c Qingdao West Work Committee (Huangdao District) Party School of CPC , Qingdao , People's Republic of China
| | - Ruixia Liu
- b State Key Laboratory of Environmental Criteria and Risk Assessment , Chinese Research Academy of Environmental Science , Beijing , People's Republic of China
| | - Hongjun Lei
- a School of Water Conservancy , North China University of Water Resources and Electric Power , Zhengzhou , People's Republic of China
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9
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Makedonskaya MI, Veselova IA, Kalmykov SN, Shekhovtsova TN. Novel biosensing system for the simultaneous multiplex fluorescent determination of catecholamines and their metabolites in biological liquids. J Pharm Biomed Anal 2018; 156:133-141. [PMID: 29702391 DOI: 10.1016/j.jpba.2018.04.026] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2018] [Revised: 04/13/2018] [Accepted: 04/17/2018] [Indexed: 10/17/2022]
Abstract
A novel original biosensing system for the simultaneous multiplex determination of general markers of catecholamine-producing diseases - catecholamines (dopamine, epinephrine, norepinephrine) and their metabolites (homovanillic and vanillylmandelic acids) in biological liquids without preliminary separation of analytes, in the absence of specific antibodies and receptors and with minimum pretreatment of a samples has been developed. This outstanding approach includes the unique combination of obtaining highly fluorescent derivatives of the analytes as a result of their interaction with two different amines ̶ benzylamine and 1,2-diphenylethylenediamine in the presence of peroxidase as a catalyst, with the application of first-order derivative fluorescence spectroscopy for the resolution of their spectra. Fluorescence is measured in 96-well microplates, which wells contain a bio-recognizing film consisted of horseradish peroxidase immobilized in the polymer chitosan. Spectra of the solutions are recorded in the range 400-500 nm (λex ∼ 305-356 nm). The proposed procedures provide sensitive (in the range of 3-200 nM), selective, and reproducible (RSDs ≤ 1%, n = 6) multiplex determination of the catecholamines and their metabolites in biological liquids were successfully applied for the rapid simultaneous (20 samples per 15-30 min) screening of human urine and mice blood plasma. The validated results showed good linearity, precision, accuracy and selectivity of this method.
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Affiliation(s)
- Maria I Makedonskaya
- Chemical Department, M.V. Lomonosov Moscow State University, Moscow, 119991, Russian Federation; National Research Centre "Kurchatov Institute", Moscow, 123182, Russian Federation.
| | - Irina A Veselova
- Chemical Department, M.V. Lomonosov Moscow State University, Moscow, 119991, Russian Federation; National Research Centre "Kurchatov Institute", Moscow, 123182, Russian Federation.
| | - Stepan N Kalmykov
- Chemical Department, M.V. Lomonosov Moscow State University, Moscow, 119991, Russian Federation; National Research Centre "Kurchatov Institute", Moscow, 123182, Russian Federation.
| | - Tatiana N Shekhovtsova
- Chemical Department, M.V. Lomonosov Moscow State University, Moscow, 119991, Russian Federation.
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10
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Maciążek-Jurczyk M, Szkudlarek A, Chudzik M, Pożycka J, Sułkowska A. Alteration of human serum albumin binding properties induced by modifications: A review. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2018; 188:675-683. [PMID: 28526195 DOI: 10.1016/j.saa.2017.05.023] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/30/2017] [Revised: 04/23/2017] [Accepted: 05/09/2017] [Indexed: 06/07/2023]
Abstract
Albumin, a major transporting protein in the blood, is the main target of modification that affects the binding of drugs to Sudlow's site I and II. These modification of serum protein moderates its physiological function, and works as a biomarker of some diseases. The main goal of the paper was to explain the possible alteration of human serum albumin binding properties induced by modifications such as glycation, oxidation and ageing, their origin, methods of evaluation and positive and negative meaning described by significant researchers.
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Affiliation(s)
- Małgorzata Maciążek-Jurczyk
- School of Pharmacy with the Division of Laboratory Medicine in Sosnowiec, Medical University of Silesia, Chair and Department of Physical Pharmacy, Jagiellońska 4, 41-200 Sosnowiec, Poland.
| | - Agnieszka Szkudlarek
- School of Pharmacy with the Division of Laboratory Medicine in Sosnowiec, Medical University of Silesia, Chair and Department of Physical Pharmacy, Jagiellońska 4, 41-200 Sosnowiec, Poland
| | - Mariola Chudzik
- School of Pharmacy with the Division of Laboratory Medicine in Sosnowiec, Medical University of Silesia, Chair and Department of Physical Pharmacy, Jagiellońska 4, 41-200 Sosnowiec, Poland
| | - Jadwiga Pożycka
- School of Pharmacy with the Division of Laboratory Medicine in Sosnowiec, Medical University of Silesia, Chair and Department of Physical Pharmacy, Jagiellońska 4, 41-200 Sosnowiec, Poland
| | - Anna Sułkowska
- Silesian Medical College in Katowice, Mickiewicza 29, 40-085 Katowice, Poland
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11
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Dissection of the interaction between human holo-transferrin and ciprofloxacin in the presence of silver nanoparticles: spectroscopic approaches. Biologia (Bratisl) 2017. [DOI: 10.1515/biolog-2017-0066] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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12
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Szkudlarek A, Pentak D, Ploch A, Pożycka J, Maciążek-Jurczyk M. In Vitro Investigation of the Interaction of Tolbutamide and Losartan with Human Serum Albumin in Hyperglycemia States. Molecules 2017; 22:molecules22122249. [PMID: 29258218 PMCID: PMC6149683 DOI: 10.3390/molecules22122249] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2017] [Revised: 12/09/2017] [Accepted: 12/15/2017] [Indexed: 01/08/2023] Open
Abstract
Serum albumin is exposed to numerous structural modifications which affect its stability and activity. Glycation is one of the processes leading to the loss of the original properties of the albumin and physiological function disorder. In terms of long lasting states of the hyperglycemia, Advanced Glycation End-products (AGEs) are formed. AGEs are responsible for cellular and tissue structure damage that cause the appearance of a number of health consequences and premature aging. The aim of the present study was to analyze the conformational changes of serum albumin by glycation—“fructation”—using multiple spectroscopic techniques, such as absorption (UV-Vis), fluorescence (SFM), circular dichroism (CD) and nuclear magnetic resonance (NMR) spectroscopy and evaluate of possible alteration of binding and competition between tolbutamide (TB, a first-generation sulfonylurea oral hypoglycemic drug) and losartan (LOS, an angiotensin II receptor (AT1) blocker used in hypertension (1st line with a coexisting diabetes)) in binding to non-glycated (HSA) and glycated (gHSAFRC) human serum albumin in high-affinity binding sites. The studies allowed us to indicate the structural alterations of human serum albumin as a result of fructose glycation. Changes in binding parameters, such as association (Ka) or Stern-Volmer (KSV) constants suggest that glycation increases the affinity of TB and LOS towards albumin and affects interactions between them. The process of albumin glycation influences the pharmacokinetics of drugs, thus monitored pharmacotherapy is reasonable in the case of diabetes and hypertension polypharmacy. This information may lead to the development of more effective drug treatments based on personalized medicine for patients with diabetes. Our studies suggest the validity of monitored polypharmacy of diabetes and coexisting diseases.
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Affiliation(s)
- Agnieszka Szkudlarek
- School of Pharmacy with the Division of Laboratory Medicine in Sosnowiec, Chair and Department of Physical Pharmacy, Jagiellońska 4, Medical University of Silesia, 41-200 Sosnowiec, Poland.
| | - Danuta Pentak
- School of Pharmacy with the Division of Laboratory Medicine in Sosnowiec, Chair and Department of Physical Pharmacy, Jagiellońska 4, Medical University of Silesia, 41-200 Sosnowiec, Poland.
| | - Anna Ploch
- School of Pharmacy with the Division of Laboratory Medicine in Sosnowiec, Chair and Department of Physical Pharmacy, Jagiellońska 4, Medical University of Silesia, 41-200 Sosnowiec, Poland.
| | - Jadwiga Pożycka
- School of Pharmacy with the Division of Laboratory Medicine in Sosnowiec, Chair and Department of Physical Pharmacy, Jagiellońska 4, Medical University of Silesia, 41-200 Sosnowiec, Poland.
| | - Małgorzata Maciążek-Jurczyk
- School of Pharmacy with the Division of Laboratory Medicine in Sosnowiec, Chair and Department of Physical Pharmacy, Jagiellońska 4, Medical University of Silesia, 41-200 Sosnowiec, Poland
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13
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Atarodi Shahri P, Sharifi Rad A, Beigoli S, Saberi MR, Chamani J. Human serum albumin–amlodipine binding studied by multi-spectroscopic, zeta-potential, and molecular modeling techniques. JOURNAL OF THE IRANIAN CHEMICAL SOCIETY 2017. [DOI: 10.1007/s13738-017-1226-6] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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14
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Yan H, Chen Y, Zhang J, Liu W, Chen R. The Role of Free Radicals in the Photodynamic Treatment of Fibrotic Skin Diseases. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2017; 923:69-74. [PMID: 27526127 DOI: 10.1007/978-3-319-38810-6_10] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/09/2023]
Abstract
The first derivatives of gelatin and type I collagen fluorescence spectra were characterized in order to describe the effect of free radicals on pyridinoline (PYD) cross-links. The different gas saturation conditions were used to investigate the effect of different free radicals. An analysis of first derivative fluorescence spectra suggests that PYD cross-link fluorescence emission is composed of three peaks in gelatin, but only two in type I collagen. The PYD cross-link was photo-degraded more than other gases in the presence of O2. This suggests that the singlet oxygen ((1)O2) plays a key role when using photodynamic therapy to treat skin fibrosis disease with Hypocrellin B (HB).
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Affiliation(s)
- Heping Yan
- Key Laboratory of Natural Pharmaceutical & Chemical Biology of Yunnan Province, Honghe University, Mengzi, Yunnan, Province, P. R. China.,School of science, Honghe University, Mengzi, Yunnan, Province, P. R. China
| | - Yashun Chen
- Key Laboratory of Natural Pharmaceutical & Chemical Biology of Yunnan Province, Honghe University, Mengzi, Yunnan, Province, P. R. China.,School of science, Honghe University, Mengzi, Yunnan, Province, P. R. China
| | - Jucheng Zhang
- Key Laboratory of Natural Pharmaceutical & Chemical Biology of Yunnan Province, Honghe University, Mengzi, Yunnan, Province, P. R. China. .,School of science, Honghe University, Mengzi, Yunnan, Province, P. R. China.
| | - Wei Liu
- Key Laboratory of Natural Pharmaceutical & Chemical Biology of Yunnan Province, Honghe University, Mengzi, Yunnan, Province, P. R. China.,School of science, Honghe University, Mengzi, Yunnan, Province, P. R. China
| | - Rui Chen
- Key Laboratory of Natural Pharmaceutical & Chemical Biology of Yunnan Province, Honghe University, Mengzi, Yunnan, Province, P. R. China.,School of science, Honghe University, Mengzi, Yunnan, Province, P. R. China
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15
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Gruia F, Parupudi A, Baca M, Ward C, Nyborg A, Remmele RL, Bee JS. Impact of Mutations on the Higher Order Structure and Activity of a Recombinant Uricase. J Pharm Sci 2017; 106:1018-1024. [DOI: 10.1016/j.xphs.2016.12.028] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2016] [Revised: 12/06/2016] [Accepted: 12/23/2016] [Indexed: 11/28/2022]
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16
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Effect of Temperature on Tolbutamide Binding to Glycated Serum Albumin. Molecules 2017; 22:molecules22040569. [PMID: 28362348 PMCID: PMC6154730 DOI: 10.3390/molecules22040569] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2017] [Revised: 03/20/2017] [Accepted: 03/27/2017] [Indexed: 12/17/2022] Open
Abstract
Glycation process occurs in protein and becomes more pronounced in diabetes when an increased amount of reducing sugar is present in bloodstream. Glycation of protein may cause conformational changes resulting in the alterations of its binding properties even though they occur at a distance from the binding sites. The changes in protein properties could be related to several pathological consequences such as diabetic and nondiabetic cardiovascular diseases, cataract, renal dysfunction and Alzheimer's disease. The experiment was designed to test the impact of glycation process on sulfonylurea drug tolbutamide-albumin binding under physiological (T = 309 K) and inflammatory (T = 311 K and T = 313 K) states using fluorescence and UV-VIS spectroscopies. It was found in fluorescence analysis experiments that the modification of serum albumin in tryptophanyl and tyrosyl residues environment may affect the tolbutamide (TB) binding to albumin in subdomain IIA and/or IIIA (Sudlow's site I and/or II), and also in subdomains IB and IIB. We estimated the binding of tolbutamide to albumin described by a mixed nature of interaction (specific and nonspecific). The association constants Ka (L∙mol-1) for tolbutamide at its high affinity sites on non-glycated albumin were in the range of 1.98-7.88 × 10⁴ L∙mol-1 (λex = 275 nm), 1.20-1.64 × 10⁴ L∙mol-1 (λex = 295 nm) and decreased to 1.24-0.42 × 10⁴ L∙mol-1 at λex = 275 nm (T = 309 K and T = 311 K) and increased to 2.79 × 10⁴ L∙mol-1 at λex = 275 nm (T = 313 K) and to 4.43-6.61 × 10⁴ L∙mol-1 at λex = 295 nm due to the glycation process. Temperature dependence suggests the important role of van der Waals forces and hydrogen bonding in hydrophobic interactions between tolbutamide and both glycated and non-glycated albumin. We concluded that the changes in the environment of TB binding of albumin in subdomain IIA and/or IIIA as well as in subdomains IB and IIB influence on therapeutic effect and therefore the studies of the binding of tolbutamide (in diabetes) to transporting protein under glycation that refers to the modification of a protein are of great importance in pharmacology and biochemistry. This information may lead to the development of more effective drug therapy in people with diabetes.
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Spectroscopic Studies on the Molecular Ageing of Serum Albumin. Molecules 2016; 22:molecules22010034. [PMID: 28035999 PMCID: PMC6155906 DOI: 10.3390/molecules22010034] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2016] [Revised: 12/21/2016] [Accepted: 12/23/2016] [Indexed: 11/17/2022] Open
Abstract
Pathological states in the organism, e.g., renal or hepatic diseases, cataract, dysfunction of coronary artery, diabetes mellitus, and also intensive workout, induce the structural modification of proteins called molecular ageing or N-A isomerization. The aim of this study was to analyze the structural changes of serum albumin caused by alkaline ageing using absorption, spectrofluorescence, and circular dichroism spectroscopy. The N-A isomerization generates significant changes in bovine (BSA) and human (HSA) serum albumin subdomains-the greatest changes were observed close to the tryptophanyl (Trp) and tyrosyl (Tyr) residue regions while a smaller change was observed in phenyloalanine (Phe) environment. Moreover, the changes in the polarity of the Trp neighborhood as well as the impact of the ageing process on α-helix, β-sheet content, and albumin molecule rotation degree have been analyzed. Based on the spectrofluorescence study, the alterations in metoprolol binding affinity to the specific sites that increase the toxicity of the drug were investigated.
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Yu H, Song Y, Pan H, Peng J, Gao H, Liu R. Synchronous fluorescence spectroscopy combined with two-dimensional correlation and principle component analysis to characterize dissolved organic matter in an urban river. ENVIRONMENTAL MONITORING AND ASSESSMENT 2016; 188:579. [PMID: 27660210 DOI: 10.1007/s10661-016-5580-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/22/2016] [Accepted: 09/07/2016] [Indexed: 06/06/2023]
Abstract
Synchronous fluorescence spectroscopy (SFS) combined with two-dimensional correlation and principle component analysis (PCA) can provide an excellent challenge to capture fluorescent components of dissolved organic matter (DOM) and reveal its spatial variations in an urban river. Water samples were collected from Baitapuhe River along human impact gradient, i.e., the rural, town, and urban regions. DOM in Baitapuhe River was composed of protein-like, microbial humic-like, fulvic-like, and humic-like fluorescent components. The protein-like was the dominant component, which consisted of tyrosine-like and tryptophan-like components. In the rural region, the variation of the microbial humic-like was higher than that of the protein-like according to the band changing order of 335 → 281 nm, and both components changed in the same direction. In the town region, the variation of the microbial humic-like was the highest followed by the protein-like and fulvic-like on the basis of the changing band order of 335 → 281 → 369 nm, and these components varied in the same trend too. In the urban region, the variation of the protein-like was the highest, followed by the microbial humic-like, fulvic-like, and humic-like based on the changing band order of 282 → 335 → 369 → 470 nm, and the protein-like variation was opposite to the other components. The SFS combined with PCA and two-dimensional correlation can be used as a powerful tool in investigating fluorescent components of DOM and revealing spatial variations of these fluorescent components.
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Affiliation(s)
- Huibin Yu
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Science, Beijing, 100012, People's Republic of China
- Department of Urban Water Environmental Research, Chinese Research Academy of Environmental Science, Beijing, 100012, People's Republic of China
| | - Yonghui Song
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Science, Beijing, 100012, People's Republic of China.
- Department of Urban Water Environmental Research, Chinese Research Academy of Environmental Science, Beijing, 100012, People's Republic of China.
| | - Hongwei Pan
- North China University of Water Resources and Electric Power, Zhengzhou, 450045, People's Republic of China
| | - Jianfeng Peng
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Science, Beijing, 100012, People's Republic of China
- Department of Urban Water Environmental Research, Chinese Research Academy of Environmental Science, Beijing, 100012, People's Republic of China
| | - Hongjie Gao
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Science, Beijing, 100012, People's Republic of China.
- Department of Urban Water Environmental Research, Chinese Research Academy of Environmental Science, Beijing, 100012, People's Republic of China.
| | - Ruixia Liu
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Science, Beijing, 100012, People's Republic of China
- Department of Urban Water Environmental Research, Chinese Research Academy of Environmental Science, Beijing, 100012, People's Republic of China
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Herrera MG, Veuthey TV, Dodero VI. Self-organization of gliadin in aqueous media under physiological digestive pHs. Colloids Surf B Biointerfaces 2016; 141:565-575. [PMID: 26897550 DOI: 10.1016/j.colsurfb.2016.02.019] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2015] [Revised: 02/02/2016] [Accepted: 02/08/2016] [Indexed: 12/22/2022]
Abstract
Here we showed that gliadin, a complex protein system related to celiac disease and other human diseases, is spontaneously self-organized in a very dilute solution at pH 3.0 and 7.0 in water under low ionic strength (10mM NaCl). The spontaneous self-organization at pH 3.0 increases the apparent solubility due to the formation of finite sized aggregates, such as those formed in the micellization of amphiphilic molecules. Switching the pH from 3.0 to 7.0 lead to a phase separation, however part of the nano-particles are stable remaining disperse in water after centrifugation. Also, beside the pH change led to changes in protein composition and concentration, we determined that the secondary structure of both system is the same. Moreover, Tyrs are slightly more buried and Trps are slightly more exposed to water at pH 7.0 than those at pH 3.0. Electron microscopy techniques showed that both gliadin systems are composed of nanostructures and in the case of pH 7.0 amorphous microaggregates were found, too. Only nanostructures at pH 3.0 showed a micromolar binding affinity to Nile red probe, suggesting the presence of accessible hydrophobic patches which are not more accessible at pH 7.0. All our results suggest that gliadin is able to self-organized at pH 3.0 forming protein micelles type nanostructures (ζ=+13, 42 ± 1.55 mV), meanwhile at 7.0 the decrease of superficial charge to ζ of +4, 78 ± 0.48 mV led to the formation of stable colloidal nanoparticles, unable to interact with Nile red probe. Our findings may open new perspectives for the understanding of gliadin ability to avoid proteolysis, to reach and cross the intestinal lumen and to trigger different immunological disorders.
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Affiliation(s)
- María G Herrera
- Departamento de Química-INQUISUR, Universidad Nacional del Su- CONICET, Av. Alem 1253, Bahía Blanca, Argentina
| | - Tania V Veuthey
- Departamento de Química-INQUISUR, Universidad Nacional del Su- CONICET, Av. Alem 1253, Bahía Blanca, Argentina
| | - Verónica I Dodero
- Departamento de Química-INQUISUR, Universidad Nacional del Su- CONICET, Av. Alem 1253, Bahía Blanca, Argentina; Universität Bielefeld, Fakultät für Chemie, Organische Chemie, Universitätsstr. 25, 33615 Bielefeld, Germany.
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Investigation of the Interaction Between Human Serum Albumin and Two Drugs as Binary and Ternary Systems. Eur J Drug Metab Pharmacokinet 2015; 41:705-721. [DOI: 10.1007/s13318-015-0297-y] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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21
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Johnson MA, Ray BD, Wassall SR, Petrache HI. Equivalent Isopropanol Concentrations of Aromatic Amino Acids Interactions with Lipid Vesicles. J Membr Biol 2015; 248:695-703. [PMID: 25691267 DOI: 10.1007/s00232-015-9781-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2014] [Accepted: 01/30/2015] [Indexed: 11/26/2022]
Abstract
We show that the interaction of aromatic amino acids with lipid bilayers can be characterized by conventional 1D [Formula: see text]H NMR spectroscopy using reference spectra obtained in isopropanol-d8/D[Formula: see text]O solutions. We demonstrate the utility of this method with three different peptides containing tyrosine, tryptophan, or phenylalanine amino acids in the presence of 1,2-dioleoyl-sn-glycero-3-phosphocholine or 1,2-dioleoyl-sn-glycero-3-phosphoserine lipid membranes. In each case, we determine an equivalent isopropanol concentration (EIC) for each hydrogen site of aromatic groups, in essence constructing a map of the chemical environment. These EIC maps provide information on relative affinities of aromatic side chains for either PC or PS bilayers and also inform on amino acid orientation preference when bound to membranes.
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Affiliation(s)
- Merrell A Johnson
- Department of Physics, Indiana University Purdue University Indianapolis, 402 N Blackford St., Indianapolis, IN, 46202, USA,
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22
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Bobone S, van de Weert M, Stella L. A reassessment of synchronous fluorescence in the separation of Trp and Tyr contributions in protein emission and in the determination of conformational changes. J Mol Struct 2014. [DOI: 10.1016/j.molstruc.2014.01.004] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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23
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Villaverde A, Morcuende D, Estévez M. Effect of Curing Agents on the Oxidative and Nitrosative Damage to Meat Proteins during Processing of Fermented Sausages. J Food Sci 2014; 79:C1331-42. [DOI: 10.1111/1750-3841.12481] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2014] [Accepted: 04/07/2014] [Indexed: 11/26/2022]
Affiliation(s)
- A. Villaverde
- Authors are with TECAL research group; Animal Production and Food Science; Univ. of Extremadura; 10003 Cáceres Spain
| | - D. Morcuende
- Authors are with TECAL research group; Animal Production and Food Science; Univ. of Extremadura; 10003 Cáceres Spain
| | - M. Estévez
- Authors are with TECAL research group; Animal Production and Food Science; Univ. of Extremadura; 10003 Cáceres Spain
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24
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Reed CJ, Bushnell S, Evilia C. Circular dichroism and fluorescence spectroscopy of cysteinyl-tRNA synthetase from Halobacterium salinarum ssp. NRC-1 demonstrates that group I cations are particularly effective in providing structure and stability to this halophilic protein. PLoS One 2014; 9:e89452. [PMID: 24594651 PMCID: PMC3940603 DOI: 10.1371/journal.pone.0089452] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2013] [Accepted: 01/21/2014] [Indexed: 12/24/2022] Open
Abstract
Proteins from extremophiles have the ability to fold and remain stable in their extreme environment. Here, we investigate the presence of this effect in the cysteinyl-tRNA synthetase from Halobacterium salinarum ssp. NRC-1 (NRC-1), which was used as a model halophilic protein. The effects of salt on the structure and stability of NRC-1 and of E. coli CysRS were investigated through far-UV circular dichroism (CD) spectroscopy, fluorescence spectroscopy, and thermal denaturation melts. The CD of NRC-1 CysRS was examined in different group I and group II chloride salts to examine the effects of the metal ions. Potassium was observed to have the strongest effect on NRC-1 CysRS structure, with the other group I salts having reduced strength. The group II salts had little effect on the protein. This suggests that the halophilic adaptations in this protein are mediated by potassium. CD and fluorescence spectra showed structural changes taking place in NRC-1 CysRS over the concentration range of 0-3 M KCl, while the structure of E. coli CysRS was relatively unaffected. Salt was also shown to increase the thermal stability of NRC-1 CysRS since the melt temperature of the CysRS from NRC-1 was increased in the presence of high salt, whereas the E. coli enzyme showed a decrease. By characterizing these interactions, this study not only explains the stability of halophilic proteins in extremes of salt, but also helps us to understand why and how group I salts stabilize proteins in general.
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Affiliation(s)
- Christopher J. Reed
- Department of Chemistry, Idaho State University, Pocatello, Idaho, United States of America
| | - Sarah Bushnell
- Department of Chemistry, Idaho State University, Pocatello, Idaho, United States of America
| | - Caryn Evilia
- Department of Chemistry, Idaho State University, Pocatello, Idaho, United States of America
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25
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Yu H, Song Y, Tu X, Du E, Liu R, Peng J. Assessing removal efficiency of dissolved organic matter in wastewater treatment using fluorescence excitation emission matrices with parallel factor analysis and second derivative synchronous fluorescence. BIORESOURCE TECHNOLOGY 2013; 144:595-601. [PMID: 23896440 DOI: 10.1016/j.biortech.2013.07.025] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/20/2013] [Revised: 07/02/2013] [Accepted: 07/05/2013] [Indexed: 06/02/2023]
Abstract
To assess removal efficiency of dissolved organic matter (DOM) in the wastewater treatment plant (WWTP), fluorescence excitation emission matrices (EEM) with parallel factor analysis (PARAFAC) and second derivative synchronous fluorescence (SDSF) were used for the characterization of DOM in wastewater. In A(2)/O process, tryptophan-like and tyrosine-like materials were removed to the much greater extent than that of fulvic-like. The protein-like material might be mostly decomposed by anaerobic and aerobic bacteria in anaerobic/anoxic and oxic zones. C1, C2, I276, I286, AP1 and AP2 were much better in tracing variations of tryptophan-like and tyrosine-like materials than C3, I329 and AF1 in tracing fulvic-like. The number of sampling sites should be reduced, as concentration variations of DOM components were subtle among sampling sites in the oxic zone and secondary sedimentation tank. SDSF may be a useful tool as PARAFAC to monitor removal efficiency of DOM fractions from wastewater in the WWTP.
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Affiliation(s)
- Huibin Yu
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China
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26
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Moghaddam MM, Pirouzi M, Saberi MR, Chamani J. Comparison of the binding behavior of FCCP with HSA and HTF as determined by spectroscopic and molecular modeling techniques. LUMINESCENCE 2013; 29:314-31. [DOI: 10.1002/bio.2546] [Citation(s) in RCA: 69] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2012] [Revised: 03/17/2013] [Accepted: 05/06/2013] [Indexed: 11/10/2022]
Affiliation(s)
| | - Malihe Pirouzi
- Department of Biology, Faculty of Sciences, Mashhad Branch; Islamic Azad University; Mashhad Iran
| | - Mohammad Reza Saberi
- Medical Chemistry Department, School of Pharmacy; Mashhad University of Medical Sciences; Mashhad Iran
| | - Jamshidkhan Chamani
- Department of Biology, Faculty of Sciences, Mashhad Branch; Islamic Azad University; Mashhad Iran
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27
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Abbas SA, Gaspar G, Sharma VK, Patapoff TW, Kalonia DS. Application of Second-Derivative Fluorescence Spectroscopy to Monitor Subtle Changes in a Monoclonal Antibody Structure. J Pharm Sci 2013; 102:52-61. [DOI: 10.1002/jps.23354] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2012] [Revised: 09/14/2012] [Accepted: 10/09/2012] [Indexed: 11/05/2022]
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28
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Utrera M, Estévez M. Analysis of tryptophan oxidation by fluorescence spectroscopy: Effect of metal-catalyzed oxidation and selected phenolic compounds. Food Chem 2012. [DOI: 10.1016/j.foodchem.2012.04.101] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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29
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Kabiri M, Amiri-Tehranizadeh Z, Baratian A, Saberi MR, Chamani J. Use of spectroscopic, zeta potential and molecular dynamic techniques to study the interaction between human holo-transferrin and two antagonist drugs: comparison of binary and ternary systems. Molecules 2012; 17:3114-47. [PMID: 22410420 PMCID: PMC6268275 DOI: 10.3390/molecules17033114] [Citation(s) in RCA: 59] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2011] [Revised: 02/24/2012] [Accepted: 02/28/2012] [Indexed: 12/03/2022] Open
Abstract
For the first time, the binding of ropinirole hydrochloride (ROP) and aspirin (ASA) to human holo-transferrin (hTf) has been investigated by spectroscopic approaches (fluorescence quenching, synchronous fluorescence, time-resolved fluorescence, three-dimensional fluorescence, UV-vis absorption, circular dichroism, resonance light scattering), as well as zeta potential and molecular modeling techniques, under simulated physiological conditions. Fluorescence analysis was used to estimate the effect of the ROP and ASA drugs on the fluorescence of hTf as well as to define the binding and quenching properties of binary and ternary complexes. The synchronized fluorescence and three-dimensional fluorescence spectra demonstrated some micro-environmental and conformational changes around the Trp and Tyr residues with a faint red shift. Thermodynamic analysis displayed the van der Waals forces and hydrogen bonds interactions are the major acting forces in stabilizing the complexes. Steady-state and time-resolved fluorescence data revealed that the fluorescence quenching of complexes are static mechanism. The effect of the drugs aggregating on the hTf resulted in an enhancement of the resonance light scattering (RLS) intensity. The average binding distance between were computed according to the forster non-radiation energy transfer theory. The circular dichroism (CD) spectral examinations indicated that the binding of the drugs induced a conformational change of hTf. Measurements of the zeta potential indicated that the combination of electrostatic and hydrophobic interactions between ROP, ASA and hTf formed micelle-like clusters. The molecular modeling confirmed the experimental results. This study is expected to provide important insight into the interaction of hTf with ROP and ASA to use in various toxicological and therapeutic processes.
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Affiliation(s)
- Mona Kabiri
- Department of Biology, Faculty of Sciences, Mashhad Branch, Islamic Azad University, Mashhad 9175687119, Iran;
| | - Zeinab Amiri-Tehranizadeh
- Medical Chemistry Department, School of Pharmacy, Mashhad University of Medical Science, Mashhad 9175687119, Iran; (Z.A.-T.); (A.B.); (M.R.S.)
| | - Ali Baratian
- Medical Chemistry Department, School of Pharmacy, Mashhad University of Medical Science, Mashhad 9175687119, Iran; (Z.A.-T.); (A.B.); (M.R.S.)
| | - Mohammad Reza Saberi
- Medical Chemistry Department, School of Pharmacy, Mashhad University of Medical Science, Mashhad 9175687119, Iran; (Z.A.-T.); (A.B.); (M.R.S.)
| | - Jamshidkhan Chamani
- Department of Biology, Faculty of Sciences, Mashhad Branch, Islamic Azad University, Mashhad 9175687119, Iran;
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Azimi O, Emami Z, Salari H, Chamani J. Probing the interaction of human serum albumin with norfloxacin in the presence of high-frequency electromagnetic fields: fluorescence spectroscopy and circular dichroism investigations. Molecules 2011; 16:9792-818. [PMID: 22117170 PMCID: PMC6264156 DOI: 10.3390/molecules16129792] [Citation(s) in RCA: 67] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2011] [Revised: 10/31/2011] [Accepted: 11/04/2011] [Indexed: 11/16/2022] Open
Abstract
The present study describes an investigation by fluorescence quenching, circular dichroism and UV-visible spectroscopy of the interaction between norfloxacin (NRF) and human serum albumin (HSA) in the presence of electromagnetic fields (EMFs). The results obtained from this study indicated that NRF had a strong ability to quench HSA at λex = 280 nm. In addition, a slight blue shift occurred, which suggested that the microenvironment of the protein became more hydrophobic after addition of NRF. The interaction between the NRF and HSA, whether in the absence or presence of an EMF, was considered to be a static quenching mechanism. Moreover, synchronous fluorescence demonstrated that the microenvironment around Trp became modified. Data of HSA-NRF in the presence of EMFs between 1 Hz–1 MHz confirmed the results of quenching and blue shifts. Corresponding Stern-Volmer plots were also drawn and the resultant Ksv and kq values were compared. Moreover, the binding parameters, including the number of binding sites, the binding constant and the distance, r, between donor and acceptor, were calculated based on Förster’s non-radiative energy transfer theory. According to far and near UV-CD, the formation of the complex caused changes of the secondary and tertiary structures of HSA. The obtained results are significant for patients who are subjected to high-frequency radiation as this was found to reduce the affinity of NRF to HSA.
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Affiliation(s)
- Olga Azimi
- Department of Biology, Faculty of Sciences, Mashhad Branch, Islamic Azad University, Mashhad, 9175687119, Iran; (O.A.); (H.S.)
| | - Zahra Emami
- Department of Physics, Faculty of Sciences, Mashhad Branch, Islamic Azad University, Mashhad, 9175687119, Iran;
| | - Hanieh Salari
- Department of Biology, Faculty of Sciences, Mashhad Branch, Islamic Azad University, Mashhad, 9175687119, Iran; (O.A.); (H.S.)
| | - Jamshidkhan Chamani
- Department of Biology, Faculty of Sciences, Mashhad Branch, Islamic Azad University, Mashhad, 9175687119, Iran; (O.A.); (H.S.)
- Author to whom correspondence should be addressed; or ; Tel.: +98511-843-7107; Fax: +98511-842-4020
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31
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Lai TM, Shin JK, Hur J. Estimating the biodegradability of treated sewage samples using synchronous fluorescence spectra. SENSORS 2011; 11:7382-94. [PMID: 22164023 PMCID: PMC3231730 DOI: 10.3390/s110807382] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/08/2011] [Revised: 07/08/2011] [Accepted: 07/18/2011] [Indexed: 12/02/2022]
Abstract
Synchronous fluorescence spectra (SFS) and the first derivative spectra of the influent versus the effluent wastewater samples were compared and the use of fluorescence indices is suggested as a means to estimate the biodegradability of the effluent wastewater. Three distinct peaks were identified from the SFS of the effluent wastewater samples. Protein-like fluorescence (PLF) was reduced, whereas fulvic and/or humic-like fluorescence (HLF) were enhanced, suggesting that the two fluorescence characteristics may represent biodegradable and refractory components, respectively. Five fluorescence indices were selected for the biodegradability estimation based on the spectral features changing from the influent to the effluent. Among the selected indices, the relative distribution of PLF to the total fluorescence area of SFS (Index II) exhibited the highest correlation coefficient with total organic carbon (TOC)-based biodegradability, which was even higher than those obtained with the traditional oxygen demand-based parameters. A multiple regression analysis using Index II and the area ratio of PLF to HLF (Index III) demonstrated the enhancement of the correlations from 0.558 to 0.711 for TOC-based biodegradability. The multiple regression equation finally obtained was 0.148 × Index II − 4.964 × Index III − 0.001 and 0.046 × Index II − 1.128 × Index III + 0.026. The fluorescence indices proposed here are expected to be utilized for successful development of real-time monitoring using a simple fluorescence sensing device for the biodegradability of treated sewage.
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Affiliation(s)
- Tien M. Lai
- Department of Environment and Energy, Sejong University, 98 Gunja-dong, Gwangjin-gu, Seoul 143-747, Korea; E-Mail:
| | - Jae-Ki Shin
- Korea Institute of Water and Environment, Korea Water Resources Corporation, Daejeon 306-711, Korea; E-Mail:
| | - Jin Hur
- Department of Environment and Energy, Sejong University, 98 Gunja-dong, Gwangjin-gu, Seoul 143-747, Korea; E-Mail:
- Author to whom correspondence should be addressed; E-Mail: ; Tel.: +82-2-3408-3826; Fax: +82-2-3408-4320
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32
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Li N, Luo H, Jia Y, Zhou N, Li Y. Rapid determination of benzo(a)pyrene in processed meat and fish samples by second-derivative constant-energy synchronous fluorescence spectrometry. Food Addit Contam Part A Chem Anal Control Expo Risk Assess 2011; 28:235-42. [DOI: 10.1080/19440049.2010.535857] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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33
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Chamani J, Vahedian-Movahed H, Saberi MR. Lomefloxacin promotes the interaction between human serum albumin and transferrin: a mechanistic insight into the emergence of antibiotic's side effects. J Pharm Biomed Anal 2010; 55:114-24. [PMID: 21273024 DOI: 10.1016/j.jpba.2010.12.029] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2010] [Revised: 12/15/2010] [Accepted: 12/18/2010] [Indexed: 10/18/2022]
Abstract
Human serum albumin (HSA) and serum transferrin (TF) are two drug carrier proteins in vivo. In this study it was investigated how lomefloxacin (LMF) binding affected the HSA-TF interaction using different spectroscopic, calorimetric and molecular modeling techniques. Fluorescence, circular dichroism and synchronous fluorescence revealed that LMF could bind to both proteins, resulting in protein conformational changes. Moreover, HSA and TF could interact so that some fluorescence residues were positioned at the interface and were shielded from quenching by LMF. The interaction between HSA and TF was further confirmed by fluorescence resonance energy transfer. Quantitative analyses of the far-UV CD spectra of the HSA-TF interaction in the presence and absence of LMF revealed secondary structural changes in detail. Resonance light-scattering studies demonstrated that the HSA-TF interaction resulted in a new species with a larger size, and that the presence of LMF could further favor this reaction. Isothermal titration calorimetry revealed that electrostatic interaction was dominant in the absence of LMF, whereas van der Waals forces and hydrogen bonding become significant in its presence. On the other hand, it was found that the binding constant of TF bound to HSA was stronger in the presence of LMF. ANS fluorescence further indicated that hydrophobic interactions play a minor part in the HSA-TF system. Molecular modeling studies confirmed the presence of fluorophore residues, hydrogen bonding and electrostatic interactions at the interface of the HSA-TF complex. It also suggested that the binding sites of LMF were not located there. These data indicate that LMF can modify the interaction between HSA and TF as two model proteins present in serum. The relevance to drugs' side effects, pharmacokinetic of drugs and selection of diagnostic biomarker is discussed.
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Affiliation(s)
- JamshidKhan Chamani
- Department of Biology, Faculty of Sciences, Islamic Azad University-Mashhad Branch, Mashhad, Iran.
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van Hell AJ, Klymchenko A, Burgers PP, Moret EE, Jiskoot W, Hennink WE, Crommelin DJA, Mastrobattista E. Conformation and intermolecular interactions of SA2 peptides self-assembled into vesicles. J Phys Chem B 2010; 114:11046-52. [PMID: 20687533 DOI: 10.1021/jp103440d] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Previously we have shown that the recombinantly produced SA2 amphiphilic oligopeptide (Ac-Ala-Ala-Val-Val-Leu-Leu-Leu-Trp-Glu-Glu-COOH) self-assembles into nanovesicles (van Hell et al. 2007). In this study, the intermolecular interactions that contribute to the formation of such peptide vesicles are examined. First, analysis of a 3-hydroxyflavone fluorescent probe inserted into the peptide assemblies demonstrated that the peptide self-assembly is based on hydrophobic clustering. The polarity of this hydrophobic microenvironment was comparable to that of negatively charged lipid bilayers. A substantial level of hydration at the hydrophilic-hydrophobic interface was detected, as was further confirmed by tryptophan fluorescence analysis. However, organic solvents such as acetonitrile, tetrahydrofuran, or ethanol could not disrupt SA2 oligopeptide vesicles, whereas these solvents fully disintegrated lipid vesicles. Instead, the SA2 assembly immediately disintegrated in hydrogen breaking solvents such dimethylsulfoxide and dimethylformamide, suggesting the involvement of additional intermolecular interactions via hydrogen bonding. Circular dichroism and Fourier transform infrared spectroscopy excluded well-defined patterns of intramolecular hydrogen bonding and indicated the polyproline type II as the dominant SA2 peptide conformation, which enables intermolecular hydrogen bonding. All-atom computational simulations were used to confirm the presence of such intermolecular hydrogen bonds and degrees of hydration. On the basis of the experimental and computational data presented, we propose a model of an interdigitated peptide assembly that involves intermolecular hydrogen bonding in addition to hydrophobic interactions that stabilize SA2 oligopeptide vesicles.
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Affiliation(s)
- Albert J van Hell
- Department of Pharmaceutics, Utrecht Institute for Pharmaceutical Sciences, Utrecht University, The Netherlands
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Sarzehi S, Chamani J. Investigation on the interaction between tamoxifen and human holo-transferrin: Determination of the binding mechanism by fluorescence quenching, resonance light scattering and circular dichroism methods. Int J Biol Macromol 2010; 47:558-69. [DOI: 10.1016/j.ijbiomac.2010.08.002] [Citation(s) in RCA: 127] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2010] [Revised: 08/01/2010] [Accepted: 08/04/2010] [Indexed: 01/26/2023]
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Garidel P, Hegyi M, Bassarab S, Weichel M. A rapid, sensitive and economical assessment of monoclonal antibody conformational stability by intrinsic tryptophan fluorescence spectroscopy. Biotechnol J 2008; 3:1201-11. [DOI: 10.1002/biot.200800091] [Citation(s) in RCA: 80] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Structural changes of cellobiohydrolase I (1,4-β-D-glucan-cellobiohydrolase I, CBHI) and PNPC (p-nitrophenyl-β-D-cellobioside) during the binding process. ACTA ACUST UNITED AC 2008; 51:459-69. [DOI: 10.1007/s11427-008-0064-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Kumar V, Sharma VK, Kalonia DS. Second derivative tryptophan fluorescence spectroscopy as a tool to characterize partially unfolded intermediates of proteins. Int J Pharm 2005; 294:193-9. [PMID: 15814244 DOI: 10.1016/j.ijpharm.2005.01.024] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2004] [Revised: 01/21/2005] [Accepted: 01/26/2005] [Indexed: 11/21/2022]
Abstract
The application of second derivative tryptophan (Trp) fluorescence spectroscopy to characterize partially unfolded intermediates of proteins relevant to protein formulation was investigated. The second derivatives of the normalized emission scans of N-acetyl tryptophanamide (NATA), single-Trp containing proteins, somatostatin and human serum albumin (HSA), and two-Trp containing proteins previously shown to form partially unfolded intermediates, beta-lactoglobulin (beta Lg) and interferon alpha-2a (IFN alpha 2a), were studied in solution. The second derivative of NATA in water showed three bands at 340, 348 and 367 nm. The 340 nm band showed a blue shift, whereas the intensity of all three bands was affected by a decrease in solution polarity. Second derivative of single-Trp containing proteins, somatostatin and HSA, showed three negative bands, whereas, the second derivative of the two-Trp containing proteins, beta Lg and IFN alpha 2a, showed four bands, two of which lie in the 320-340 nm range. These two bands were attributed to the presence of the Trps in different microenvironments. The characteristic changes in the intensities of these two bands on addition of guanidine hydrochloride (beta Lg) and with a decrease in solution pH (IFN alpha 2a) were related to the presence of partially unfolded intermediates of these proteins. Thus, second derivative Trp fluorescence spectroscopy can be used as an important tool to identify partially unfolded states of proteins during formulation utilizing order of magnitude lower concentrations compared to such other technique as near UV CD.
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Affiliation(s)
- Vineet Kumar
- Department of Pharmaceutical Sciences, School of Pharmacy, University of Connecticut, U-2092 Storrs, CT 06269, USA
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