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Serum Albumin in Health and Disease: Esterase, Antioxidant, Transporting and Signaling Properties. Int J Mol Sci 2021; 22:ijms221910318. [PMID: 34638659 PMCID: PMC8508759 DOI: 10.3390/ijms221910318] [Citation(s) in RCA: 91] [Impact Index Per Article: 30.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2021] [Revised: 09/16/2021] [Accepted: 09/21/2021] [Indexed: 12/11/2022] Open
Abstract
Being one of the main proteins in the human body and many animal species, albumin plays a decisive role in the transport of various ions-electrically neutral and charged molecules-and in maintaining the colloidal osmotic pressure of the blood. Albumin is able to bind to almost all known drugs, as well as many nutraceuticals and toxic substances, largely determining their pharmaco- and toxicokinetics. Albumin of humans and respective representatives in cattle and rodents have their own structural features that determine species differences in functional properties. However, albumin is not only passive, but also an active participant of pharmacokinetic and toxicokinetic processes, possessing a number of enzymatic activities. Numerous experiments have shown esterase or pseudoesterase activity of albumin towards a number of endogeneous and exogeneous esters. Due to the free thiol group of Cys34, albumin can serve as a trap for reactive oxygen and nitrogen species, thus participating in redox processes. Glycated albumin makes a significant contribution to the pathogenesis of diabetes and other diseases. The interaction of albumin with blood cells, blood vessels and tissue cells outside the vascular bed is of great importance. Interactions with endothelial glycocalyx and vascular endothelial cells largely determine the integrative role of albumin. This review considers the esterase, antioxidant, transporting and signaling properties of albumin, as well as its structural and functional modifications and their significance in the pathogenesis of certain diseases.
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Yang J, Li H, Wang X, Zhang C, Feng G, Peng X. Inhibition Mechanism of α-Amylase/α-Glucosidase by Silibinin, Its Synergism with Acarbose, and the Effect of Milk Proteins. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2021; 69:10515-10526. [PMID: 34463509 DOI: 10.1021/acs.jafc.1c01765] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
As a natural flavonolignan, silibinin is reported to possess multiple biological activities, while the inhibitory potential of silibinin on carbohydrate-hydrolyzing enzymes is still unclear. Therefore, in this study, the inhibitory effect and underlying mechanism of silibinin against α-amylase/α-glucosidase were investigated. The results indicated that silibinin showed a strong inhibitory efficiency against α-amylase/α-glucosidase in noncompetitive manners and exhibited synergistic inhibition against α-glucosidase with acarbose. However, interestingly, the inhibitory effect of silibinin was significantly hindered in various milk protein-rich environments, but this phenomenon disappeared after simulated gastrointestinal digestion of milk proteins in vitro. Furthermore, silibinin could combine with the inactive site of α-amylase/α-glucosidase and change the microenvironment and secondary structure of the enzymes, thereby influencing the catalytic efficiency of enzymes. This research suggested that silibinin could be used as a novel carbohydrate-hydrolyzing enzyme inhibitor, and milk beverages rich in silibinin had the potential for further application in antidiabetic dietary or medicine.
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Affiliation(s)
- Jichen Yang
- School of Life Sciences, Tianjin University, Tianjin 300072, People's Republic of China
| | - Huan Li
- School of Life Sciences, Tianjin University, Tianjin 300072, People's Republic of China
| | - Xiaoli Wang
- School of Life Sciences, Tianjin University, Tianjin 300072, People's Republic of China
| | - Chuanying Zhang
- School of Life Sciences, Tianjin University, Tianjin 300072, People's Republic of China
| | - Guo Feng
- School of Life Sciences, Tianjin University, Tianjin 300072, People's Republic of China
| | - Xin Peng
- School of Life Sciences, Tianjin Key Laboratory of Function and Application of Biological Macromolecular Structures, Tianjin University, Tianjin 300072, People's Republic of China
- Key Laboratory of Tropical Medicinal Resources Chemistry of Ministry of Education, Hainan Normal University, Haikou, Hainan 571158, People's Republic of China
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Ahmad MI, Potshangbam AM, Javed M, Ahmad M. Studies on conformational changes induced by binding of pendimethalin with human serum albumin. CHEMOSPHERE 2020; 243:125270. [PMID: 31726261 DOI: 10.1016/j.chemosphere.2019.125270] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/11/2019] [Revised: 10/28/2019] [Accepted: 10/29/2019] [Indexed: 06/10/2023]
Abstract
Pendimethalin (PND) is a widely used herbicide in modern means of agricultural practices. So, its toxic residues exist extensively in the environment and can enter human body. Therefore, the in vitro interaction of PND with human serum albumin (HSA) has been explored by employing various biophysical, molecular docking and dynamics simulation studies as well as enzyme kinetics to unravel its binding mechanism. The binding constant of the PND-HSA complex was about 104 M-1 using Fluorescence quenching spectra. The negative value of Gibbs free energy change (ΔG0 = -32.0 kJ mol-1) indicates this interaction is a spontaneous process. A large negative ΔH0 and positive ΔS0 suggests that hydrophobic interactions and H-bonding are involved in the binding process of PND with HSA. The binding of PND can cause conformational and micro-environmental changes in HSA molecule, as shown by various biophysical and molecular dynamics simulation studies. The site marker competition and molecular docking and simulation experiments affirmed that the binding of PND to HSA occurs at or near site I. Esterase-like activity of HSA exhibited decline in the presence of PND revealed the direct involvement of Lys199 of subdomain IIA (Sudlow's site I) in the binding process.
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Affiliation(s)
- Md Irshad Ahmad
- Department of Biochemistry, Faculty of Life Sciences, Aligarh Muslim University, Aligarh, UP, 202002, India
| | | | - Mehjbeen Javed
- Aquatic Toxicology Research Laboratory, Department of Zoology, Aligarh Muslim University, Aligarh, UP, 202002, India
| | - Masood Ahmad
- Department of Biochemistry, Faculty of Life Sciences, Aligarh Muslim University, Aligarh, UP, 202002, India.
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Roslan AA, Tayyab S. Exploring ligand-protein interaction: A laboratory exercise on herbicide binding to plasma transport protein. BIOCHEMISTRY AND MOLECULAR BIOLOGY EDUCATION : A BIMONTHLY PUBLICATION OF THE INTERNATIONAL UNION OF BIOCHEMISTRY AND MOLECULAR BIOLOGY 2019; 47:156-160. [PMID: 30629781 DOI: 10.1002/bmb.21207] [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: 08/23/2018] [Revised: 12/05/2018] [Accepted: 12/21/2018] [Indexed: 06/09/2023]
Abstract
A laboratory exercise on the interaction between the herbicide pendimethalin (PM) and goat serum albumin (GSA), a carrier protein present in mammalian blood circulation, is described. Fluorescence spectroscopy was used to study the binding reaction between PM and GSA. Titration of a constant amount of the protein (GSA) with increasing ligand (PM) concentrations produced a consecutive decrease in the protein's fluorescence. Treatment of the fluorescence quenching data according to the Stern-Volmer equation yielded the values of the Stern-Volmer constant (Ksv ) and bimolecular quenching rate constant (kq ), whereas values of the binding constant (Ka ) and number of binding sites (n) were obtained from the double logarithmic plot. This experiment provides an exciting opportunity for undergraduate students to independently perform ligand binding studies with a protein, in addition to providing the means for the determination of their binding parameters. © 2019 International Union of Biochemistry and Molecular Biology, 47(2): 156-160, 2019.
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Affiliation(s)
- Amira Adlin Roslan
- Institute of Biological Sciences, Faculty of Science, University of Malaya, Kuala Lumpur, Malaysia
| | - Saad Tayyab
- Institute of Biological Sciences, Faculty of Science, University of Malaya, Kuala Lumpur, Malaysia
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Naveenraj S, Mangalaraja RV, Krasulyaa O, Syed A, Ameen F, Anandan S. A general microwave synthesis of metal (Ni, Cu, Zn) selenide nanoparticles and their competitive interaction with human serum albumin. NEW J CHEM 2018. [DOI: 10.1039/c7nj04316c] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Simple microwave irradiation technique was used to synthesize a series of selenide nanoparticles (platelet-like NiSe nanoparticles, uniform CuSe nanorods, and distorted ZnSe nano-hexagons) and their competitive interaction with human serum albumin was studied.
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Affiliation(s)
- Selvaraj Naveenraj
- Advanced Ceramics and Nanotechnology Laboratory
- Department of Materials Engineering
- University of Concepcion
- Concepcion
- Chile
| | | | - Olga Krasulyaa
- Moscow State University of Technology and Management
- Moscow
- Russia
| | - Asad Syed
- Department of Botany and Microbiology
- College of Science
- King Saud University
- Riyadh 11451
- Saudi Arabia
| | - Fuad Ameen
- Department of Botany and Microbiology
- College of Science
- King Saud University
- Riyadh 11451
- Saudi Arabia
| | - Sambandam Anandan
- Nanomaterials & Solar Energy Conversion Lab
- Department of Chemistry
- National Institute of Technology
- Tiruchirappalli 620015
- India
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Xiong X, Gan R, Suo Z, Tang P, Zhang S, Zhu Y, Sun Q, Li H. Interactions between the antiviral drug telaprevir and human serum albumin: a combined study with spectroscopic methods and molecular modeling. NEW J CHEM 2018. [DOI: 10.1039/c8nj00655e] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The binding mechanism between telaprevir and human serum albumin was explored by combining spectroscopic methods and molecular dynamics simulations.
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Affiliation(s)
- Xinnuo Xiong
- College of Chemical Engineering
- Sichuan University
- Chengdu Sichuan
- China
| | - Ruixue Gan
- College of Chemical Engineering
- Sichuan University
- Chengdu Sichuan
- China
| | - Zili Suo
- College of Chemical Engineering
- Sichuan University
- Chengdu Sichuan
- China
| | - Peixiao Tang
- College of Chemical Engineering
- Sichuan University
- Chengdu Sichuan
- China
| | | | - Yujie Zhu
- College of Chemical Engineering
- Sichuan University
- Chengdu Sichuan
- China
| | - Qiaomei Sun
- College of Chemical Engineering
- Sichuan University
- Chengdu Sichuan
- China
| | - Hui Li
- College of Chemical Engineering
- Sichuan University
- Chengdu Sichuan
- China
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Alam MM, Abul Qais F, Ahmad I, Alam P, Hasan Khan R, Naseem I. Multi-spectroscopic and molecular modelling approach to investigate the interaction of riboflavin with human serum albumin. J Biomol Struct Dyn 2017; 36:795-809. [PMID: 28276274 DOI: 10.1080/07391102.2017.1298470] [Citation(s) in RCA: 65] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
Riboflavin (RF) plays an important role in various metabolic redox reactions in the form of flavin adenine dinucleotide and flavin mononucleotide. Human serum albumin (HSA) is an important protein involved in the transportation of drugs, hormones, fatty acid and other molecules which determine the biodistribution and physiological fate of these molecules. In this study, we have investigated the interaction of riboflavin RF with HSA under simulative physiological conditions using various biophysical, calorimetric and molecular docking techniques. Results demonstrate the formation of riboflavin-HSA complex with binding constant in the order of 104 M-1. Fluorescence spectroscopy confirms intermediate strength having a static mode of quenching with stoichiometry of 1:1. Experimental results suggest that the binding site of riboflavin mainly resides in sub-domain IIA of HSA and that ligand interaction increases the α-helical content of HSA. These parameters were further verified by isothermal titration calorimetry ITC which confirms the thermodynamic parameters obtained by fluorescence spectroscopy. Molecular docking was employed to suggest a binding model. Based on thermodynamic, spectroscopic and computational observations it can be concluded that HSA-riboflavin complex is mainly stabilized by various non-covalent forces with binding energy of -7.2 kcal mol-1.
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Affiliation(s)
- Md Maroof Alam
- a Department of Biochemistry, Faculty of Life Sciences , Aligarh Muslim University , Aligarh , India
| | - Faizan Abul Qais
- b Department of Agricultural Microbiology , Aligarh Muslim University , Aligarh , India
| | - Iqbal Ahmad
- b Department of Agricultural Microbiology , Aligarh Muslim University , Aligarh , India
| | - Parvez Alam
- c Interdisciplinary Biotechnology Unit , Aligarh Muslim University , Aligarh , India
| | - Rizwan Hasan Khan
- c Interdisciplinary Biotechnology Unit , Aligarh Muslim University , Aligarh , India
| | - Imrana Naseem
- a Department of Biochemistry, Faculty of Life Sciences , Aligarh Muslim University , Aligarh , India
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