1
|
Ma B, Al-Wraikat M, Shu Q, Yang X, Liu Y. An Overview of Interactions between Goat Milk Casein and Other Food Components: Polysaccharides, Polyphenols, and Metal Ions. Foods 2024; 13:2903. [PMID: 39335832 PMCID: PMC11431459 DOI: 10.3390/foods13182903] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2024] [Revised: 09/07/2024] [Accepted: 09/11/2024] [Indexed: 09/30/2024] Open
Abstract
Casein is among the most abundant proteins in milk and has high nutritional value. Casein's interactions with polysaccharides, polyphenols, and metal ions are important for regulating the functional properties and textural quality of dairy foods. To improve the functional properties of casein-based foods, a deep understanding of the interaction mechanisms and the influencing factors between casein and other food components is required. This review started by elucidating the interaction mechanism of casein with polysaccharides, polyphenols, and metal ions. Thermodynamic incompatibility and attraction are the fundamental factors in determining the interaction types between casein and polysaccharides, which leads to different phase behaviors and microstructural types in casein-based foods. Additionally, the interaction of casein with polyphenols primarily occurs through non-covalent (hydrogen bonding, hydrophobic interactions, van der Waals forces, and ionic bonding) or covalent interaction (primarily based on the oxidation of proteins or polyphenols by enzymatic or non-enzymatic (alkaline or free radical grafting) approaches). Moreover, the selectivity of casein to specific metal ions is also introduced. Factors affecting the binding of casein to the above three components, such as temperature, pH, the mixing ratio, and the fine structure of these components, are also summarized to provide a good foundation for casein-based food applications.
Collapse
Affiliation(s)
- Bohan Ma
- College of Food Engineering and Nutritional Science, Shaanxi Normal University, Xi’an 710119, China; (B.M.); (M.A.-W.); (Q.S.)
| | - Majida Al-Wraikat
- College of Food Engineering and Nutritional Science, Shaanxi Normal University, Xi’an 710119, China; (B.M.); (M.A.-W.); (Q.S.)
| | - Qin Shu
- College of Food Engineering and Nutritional Science, Shaanxi Normal University, Xi’an 710119, China; (B.M.); (M.A.-W.); (Q.S.)
| | - Xi Yang
- Department of Food Science and Technology, Tokyo University of Marine Science and Technology, 4-5-7 Konan, Minato-ku, Tokyo 108-8477, Japan
| | - Yongfeng Liu
- College of Food Engineering and Nutritional Science, Shaanxi Normal University, Xi’an 710119, China; (B.M.); (M.A.-W.); (Q.S.)
| |
Collapse
|
2
|
Lozano-Chamizo L, Márquez C, Marciello M, Galdon JC, de la Fuente-Zapico E, Martinez-Mazón P, Gonzalez-Rumayor V, Filice M, Gamiz F. High enhancement of sensitivity and reproducibility in label-free SARS-CoV-2 detection with graphene field-effect transistor sensors through precise surface biofunctionalization control. Biosens Bioelectron 2024; 250:116040. [PMID: 38290380 DOI: 10.1016/j.bios.2024.116040] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2023] [Revised: 12/14/2023] [Accepted: 01/12/2024] [Indexed: 02/01/2024]
Abstract
The COVID-19 pandemic has taught us valuable lessons, especially the urgent need for a widespread, rapid and sensitive diagnostic tool. To this, the integration of bidimensional nanomaterials, particularly graphene, into point-of-care biomedical devices is a groundbreaking strategy able to potentially revolutionize the diagnostic landscape. Despite advancements in the fabrication of these biosensors, the relationship between their surface biofunctionalization and sensing performance remains unclear. Here, we demonstrate that the combination of careful sensor fabrication and its precise surface biofunctionalization is crucial for exalting the sensing performances of 2D biosensors. Specifically, we have biofunctionalized Graphene Field-Effect Transistor (GFET) sensors surface through different biochemical reactions to promote either random/heterogeneous or oriented/homogeneous immobilization of the Anti-SARS-CoV-2 spike protein antibody. Each strategy was thoroughly characterized by in-silico simulations, physicochemical and biochemical techniques and electrical characterization. Subsequently, both biosensors were tested in the label-free direct titration of SARS-CoV-2 virus in simulated clinical samples, avoiding sample preprocessing and within short timeframes. Remarkably, the oriented GFET biosensor exhibited significantly enhanced reproducibility and responsiveness, surpassing the detection sensitivity of conventional non-oriented GFET by more than twofold. This breakthrough not only involves direct implications for COVID-19 surveillance and next pandemic preparedness but also clarify an unexplored mechanistic dimension of biosensor research utilizing 2D-nanomaterials.
Collapse
Affiliation(s)
- Laura Lozano-Chamizo
- Nanobiotechnology for Life Sciences Laboratory, Department of Chemistry in Pharmaceutical Sciences, Faculty of Pharmacy, Universidad Complutense de Madrid (UCM), Plaza Ramón y Cajal s/n, E-28040, Madrid, Spain; Microscopy and Dynamic Imaging Unit, Fundación Centro Nacional de Investigaciones Cardiovasculares Carlos III (CNIC), Calle Melchor Fernández Almagro 3, E-28029, Madrid, Spain; Atrys Health, E-28001, Madrid, Spain
| | - Carlos Márquez
- Nanoelectronics Research Group, Department of Electronics, CITIC-UGR (Research Center for Information and Communication Technologies), University of Granada, Spain; Instituto de Investigación Biosanitaria de Granada ibs.GRANADA, 18012, Granada, Spain
| | - Marzia Marciello
- Nanobiotechnology for Life Sciences Laboratory, Department of Chemistry in Pharmaceutical Sciences, Faculty of Pharmacy, Universidad Complutense de Madrid (UCM), Plaza Ramón y Cajal s/n, E-28040, Madrid, Spain; Microscopy and Dynamic Imaging Unit, Fundación Centro Nacional de Investigaciones Cardiovasculares Carlos III (CNIC), Calle Melchor Fernández Almagro 3, E-28029, Madrid, Spain
| | - José Carlos Galdon
- Nanoelectronics Research Group, Department of Electronics, CITIC-UGR (Research Center for Information and Communication Technologies), University of Granada, Spain; Instituto de Investigación Biosanitaria de Granada ibs.GRANADA, 18012, Granada, Spain
| | - Elsa de la Fuente-Zapico
- Nanoelectronics Research Group, Department of Electronics, CITIC-UGR (Research Center for Information and Communication Technologies), University of Granada, Spain; Instituto de Investigación Biosanitaria de Granada ibs.GRANADA, 18012, Granada, Spain
| | - Paula Martinez-Mazón
- Nanoelectronics Research Group, Department of Electronics, CITIC-UGR (Research Center for Information and Communication Technologies), University of Granada, Spain; Instituto de Investigación Biosanitaria de Granada ibs.GRANADA, 18012, Granada, Spain
| | | | - Marco Filice
- Nanobiotechnology for Life Sciences Laboratory, Department of Chemistry in Pharmaceutical Sciences, Faculty of Pharmacy, Universidad Complutense de Madrid (UCM), Plaza Ramón y Cajal s/n, E-28040, Madrid, Spain; Microscopy and Dynamic Imaging Unit, Fundación Centro Nacional de Investigaciones Cardiovasculares Carlos III (CNIC), Calle Melchor Fernández Almagro 3, E-28029, Madrid, Spain.
| | - Francisco Gamiz
- Nanoelectronics Research Group, Department of Electronics, CITIC-UGR (Research Center for Information and Communication Technologies), University of Granada, Spain; Instituto de Investigación Biosanitaria de Granada ibs.GRANADA, 18012, Granada, Spain.
| |
Collapse
|
3
|
Binding Investigation of Some Important Metal Ions Copper (I), Nickel (II), and Aluminium (III) with Bovine Serum Albumin Using Valid Spectroscopic Techniques. J CHEM-NY 2023. [DOI: 10.1155/2023/2581653] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/17/2023] Open
Abstract
Studies based on the interaction of metals with proteins resulted in the development of promising metal-based compounds with encouraging medicinal potential. This study was aimed to utilize FT-IR and UV-Vis spectroscopic techniques to analyze the interactions of biologically significant metal ions, such as Al3+, Ni+2, and Cu+, with bovine serum albumin (BSA). Different concentrations of metal ions were interacted with BSA, and the complexes were analyzed using the two techniques. The change in the BSA secondary structure components such as β-sheet, β-antiparallel, α-helix, β-turn, and random coil were analyzed using second derivative resolution enhancement. The FT-IR spectroscopy suggested a marked decrease in the C=O stretching (corresponding to amide I) and C=N stretching (corresponding to amide II) intensities. Interestingly, upon complexation, a marked reduction (22.58–29.03%) in the α-helical component was observed with a considerable increase in the random coil component. The intensity of the absorption peak of BSA obtained using UV was observed to increase consecutively as the concentration of Cu+, Al3+, and Ni2+ ions increased. The binding constants for the BSA-Cu+, BSA-Ni+2, and BSA-Al+3 complexes were calculated to be 3.46 × 104 M−1, 1.28 × 104 M−1, and 2.08 × 104 M−1, respectively. It was concluded that the binding interaction decreased in the order Cu+ > Al3+ > Ni2+. These findings were similar to our previous findings using affinity capillary electrophoresis (ACE). Therefore, it can be inferred that the FT-IR and UV techniques might be utilised effectively to assess the metal-protein interaction and can have wide application in routine analysis. These techniques have several advantages in being simple, easy-to-perform, rapid, and affordable over other high-end techniques.
Collapse
|
4
|
Investigation of bovine serum albumin aggregation upon exposure to silver(i) and copper(ii) metal ions using Zetasizer. OPEN CHEM 2021. [DOI: 10.1515/chem-2021-0089] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Abstract
Depending upon the metal coordination capacity and the binding sites of proteins, interaction between metal and proteins leads to a number of changes in the protein molecule which may include the change in conformation, unfolding, overall charge, and aggregation in some cases. In this study, Cu(ii) and Ag(i) metal ions were selected to investigate aggregation of bovine serum albumin (BSA) molecule upon interaction by measuring the size and charge of the aggregates using nano-Zetasizer instrument. Two concentrations of metal ions were made to interact with a specific concentration of BSA and the size and zeta potential of BSA aggregates were measured from 0 min upto 18 h. The Cu(ii) and Ag(i) metal ions showed almost similar behavior in inducing the BSA aggregation and the intensity of peak corresponding to the normal-sized protein decreased with time, whereas the peak corresponding to the protein aggregate increased. However, the effect on zeta potential of the aggregates was observed to be different with both metal ions. The aggregation of protein due to interaction of different metal ions is important to study as it gives insight to the pathogenesis of many neurological disorders and would result in developing effective ways to limit their exposure.
Collapse
|
5
|
El Hajj S, Sepúlveda Rincón CT, Girardet JM, Cakir-Kiefer C, Stefan L, Zapata Montoya JE, Boschi-Muller S, Gaucher C, Canabady-Rochelle L. Electrically Switchable Nanolever Technology for the Screening of Metal-Chelating Peptides in Hydrolysates. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2021; 69:8819-8827. [PMID: 34324321 DOI: 10.1021/acs.jafc.1c02199] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Metal-chelating peptides (MCP) are considered as indirect antioxidants due to their capacity to inhibit radical chain reaction and oxidation. Here, we propose a new proof of concept for the screening of MCPs present in protein hydrolysates for valorizing their antioxidant properties by using the emerging time-resolved molecular dynamics technology, switchSENSE. This method unveils possible interactions between MCPs and immobilized nickel ions using fluorescence and electro-switchable DNA chips. The switchSENSE method was first set up on synthetic peptides known for their metal-chelating properties. Then, it was applied to soy and tilapia viscera protein hydrolysates. Their Cu2+-chelation capacity was, in addition, determined by UV-visible spectrophotometry as a reference method. The switchSENSE method has displayed a high sensitivity to evidence the presence of MCPs in both hydrolysates. Hence, we demonstrate for the first time that this newly introduced technology is a convenient methodology to screen protein hydrolysates in order to determine the presence of MCPs before launching time-consuming separations.
Collapse
Affiliation(s)
- Sarah El Hajj
- Université de Lorraine, CNRS, LRGP, Nancy F-54000, France
- Université de Lorraine, CITHEFOR, Vandoeuvre Les Nancy F-54505, France
| | - Cindy Tatiana Sepúlveda Rincón
- Université de Lorraine, CNRS, LRGP, Nancy F-54000, France
- Nutrition & Food Technology Group, Universidad de Antioquia, Medellín 050010, Colombia
| | | | | | - Loic Stefan
- Université de Lorraine, CNRS, LCPM, Nancy F-54000, France
| | | | | | - Caroline Gaucher
- Université de Lorraine, CITHEFOR, Vandoeuvre Les Nancy F-54505, France
| | | |
Collapse
|
6
|
Huang J, Jiao L, Xu W, Fang Q, Wang H, Cai X, Yan H, Gu W, Zhu C. Immobilizing Enzymes on Noble Metal Hydrogel Nanozymes with Synergistically Enhanced Peroxidase Activity for Ultrasensitive Immunoassays by Cascade Signal Amplification. ACS APPLIED MATERIALS & INTERFACES 2021; 13:33383-33391. [PMID: 34232027 DOI: 10.1021/acsami.1c09100] [Citation(s) in RCA: 34] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Enzyme immobilization plays an essential role in solving the problems of the inherently fragile nature of enzymes. Although prominent stability and reuse of enzymes can be achieved by enzyme immobilization, their bioactivity and catalytic efficiency will be adversely affected. Herein, PdCu hydrogel nanozymes with a hierarchically porous structure were used to immobilize horseradish peroxidase (HRP) to obtain PdCu@HRP. In addition to the improvement of stability and reusability, PdCu@HRP displayed synergistically enhanced activities than native HRP and PdCu hydrogels. Not only the specific interactions between PdCu hydrogel nanozymes and enzymes but also the enrichment of substrates around enzymes by electrostatic adsorption of hydrogels was proposed to expound the enhanced catalytic activity. Accordingly, by taking advantage of the excellent catalytic performance of the PdCu@HRP and the glucose oxidase encapsulated in zeolitic imidazolate framework-8, colorimetric biosensing of the carcinoembryonic antigen via catalytic cascade reactions for achieving signal amplification was performed. The obtained biosensor enhanced the detection sensitivity by approximately 6.1-fold as compared to the conventional HRP-based enzyme-linked immunosorbent assay, demonstrating the promising potential in clinical diagnosis.
Collapse
Affiliation(s)
- Jiajia Huang
- Key Laboratory of Pesticide and Chemical Biology of Ministry of Education, International Joint Research Center for Intelligent Biosensing Technology and Health, College of Chemistry, Central China Normal University, Wuhan 430079, P. R. China
| | - Lei Jiao
- Key Laboratory of Pesticide and Chemical Biology of Ministry of Education, International Joint Research Center for Intelligent Biosensing Technology and Health, College of Chemistry, Central China Normal University, Wuhan 430079, P. R. China
| | - Weiqing Xu
- Key Laboratory of Pesticide and Chemical Biology of Ministry of Education, International Joint Research Center for Intelligent Biosensing Technology and Health, College of Chemistry, Central China Normal University, Wuhan 430079, P. R. China
| | - Qie Fang
- Key Laboratory of Pesticide and Chemical Biology of Ministry of Education, International Joint Research Center for Intelligent Biosensing Technology and Health, College of Chemistry, Central China Normal University, Wuhan 430079, P. R. China
| | - Hengjia Wang
- Key Laboratory of Pesticide and Chemical Biology of Ministry of Education, International Joint Research Center for Intelligent Biosensing Technology and Health, College of Chemistry, Central China Normal University, Wuhan 430079, P. R. China
| | - Xiaoli Cai
- Key Laboratory of Pesticide and Chemical Biology of Ministry of Education, International Joint Research Center for Intelligent Biosensing Technology and Health, College of Chemistry, Central China Normal University, Wuhan 430079, P. R. China
| | - Hongye Yan
- Key Laboratory of Pesticide and Chemical Biology of Ministry of Education, International Joint Research Center for Intelligent Biosensing Technology and Health, College of Chemistry, Central China Normal University, Wuhan 430079, P. R. China
| | - Wenling Gu
- Key Laboratory of Pesticide and Chemical Biology of Ministry of Education, International Joint Research Center for Intelligent Biosensing Technology and Health, College of Chemistry, Central China Normal University, Wuhan 430079, P. R. China
| | - Chengzhou Zhu
- Key Laboratory of Pesticide and Chemical Biology of Ministry of Education, International Joint Research Center for Intelligent Biosensing Technology and Health, College of Chemistry, Central China Normal University, Wuhan 430079, P. R. China
| |
Collapse
|
7
|
Hutanu A, Hauser PC, Moritz B, Kiessig S, Noël A, Stracke JO, Wild M, Schwarz MA. Methionine oxidation of proteins analyzed by affinity capillary electrophoresis in presence of silver(I) and gold(III) ions. Electrophoresis 2021; 42:1209-1216. [PMID: 33651405 PMCID: PMC9291207 DOI: 10.1002/elps.202000355] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2020] [Revised: 01/25/2021] [Accepted: 02/12/2021] [Indexed: 11/08/2022]
Abstract
Oxidative damage of biopharmaceuticals during manufacturing and storage is a key concern throughout pharmaceutical development. However, few simple and robust analytical methods are available for the determination of oxidation sites. Here, the potential of affinity capillary electrophoresis (ACE) in the separation of proteins with oxidized methionine (Met) residues is shown. Silver(I) and gold(I) ions have the attribute to selectively form complexes with thioethers over sulfoxides. The addition of these ions to the BGE leads to a selective complexation of Met residues and, thus, to a change of charge allowing separation of species according to the different oxidation states of Met. The mechanisms of these interactions are discussed and binding constants for peptides containing Met with silver(I) are calculated. Additionally, the proposed method can be used as an indicator of oxidative stress in large proteins. The presented technique is easily accessible, economical, and has rapid analysis times, adding new approaches to the analytical toolbox of Met sulfoxide detection.
Collapse
Affiliation(s)
- Andrei Hutanu
- Pharma Technical Development Europe (Biologics) Analytics, Basel, Switzerland.,Department of Chemistry, University of Basel, Basel, Switzerland
| | - Peter C Hauser
- Department of Chemistry, University of Basel, Basel, Switzerland
| | - Bernd Moritz
- Pharma Technical Development Europe (Biologics) Analytics, Basel, Switzerland
| | - Steffen Kiessig
- Pharma Technical Development Europe (Biologics) Analytics, Basel, Switzerland
| | - Aurélie Noël
- Pharma Technical Development Europe (Biologics) Analytics, Basel, Switzerland
| | - Jan O Stracke
- Pharma Technical Development Europe (Biologics) Analytics, Basel, Switzerland
| | - Markus Wild
- Pharma Technical Development Europe (Biologics) Analytics, Basel, Switzerland
| | - Maria A Schwarz
- Department of Chemistry, University of Basel, Basel, Switzerland.,Business Unit Biopharmaceuticals, Solvias AG, Kaiseraugst, Switzerland
| |
Collapse
|
8
|
Wang Y, Adeoye DI, Ogunkunle EO, Wei IA, Filla RT, Roper MG. Affinity Capillary Electrophoresis: A Critical Review of the Literature from 2018 to 2020. Anal Chem 2020; 93:295-310. [DOI: 10.1021/acs.analchem.0c04526] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Yao Wang
- Department of Chemistry and Biochemistry, Florida State University, 95 Chieftain Way, Tallahassee, Florida 32306, United States
| | - Damilola I. Adeoye
- Department of Chemistry and Biochemistry, Florida State University, 95 Chieftain Way, Tallahassee, Florida 32306, United States
| | - Emmanuel O. Ogunkunle
- Department of Chemistry and Biochemistry, Florida State University, 95 Chieftain Way, Tallahassee, Florida 32306, United States
| | - I-An Wei
- Department of Chemistry and Biochemistry, Florida State University, 95 Chieftain Way, Tallahassee, Florida 32306, United States
| | - Robert T. Filla
- Department of Chemistry and Biochemistry, Florida State University, 95 Chieftain Way, Tallahassee, Florida 32306, United States
| | - Michael G. Roper
- Department of Chemistry and Biochemistry, Florida State University, 95 Chieftain Way, Tallahassee, Florida 32306, United States
| |
Collapse
|
9
|
Scheller C, Krebs F, Minkner R, Astner I, Gil‐Moles M, Wätzig H. Physicochemical properties of SARS-CoV-2 for drug targeting, virus inactivation and attenuation, vaccine formulation and quality control. Electrophoresis 2020; 41:1137-1151. [PMID: 32469436 PMCID: PMC7283733 DOI: 10.1002/elps.202000121] [Citation(s) in RCA: 69] [Impact Index Per Article: 17.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2020] [Revised: 05/22/2020] [Accepted: 05/22/2020] [Indexed: 12/22/2022]
Abstract
The material properties of the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) and its proteins are discussed. We review the viral structure, size, rigidity, lipophilicity, isoelectric point, buoyant density and centrifugation conditions, stability against pH, temperature, UV light, gamma radiation, and susceptibility to various chemical agents including solvents and detergents. Possible inactivation, downstream, and formulation conditions are given including suitable buffers and some first ideas for quality-control methods. This information supports vaccine development and discussion with competent authorities during vaccine approval and is certainly related to drug-targeting strategies and hygienics. Several instructive tables are given, including the pI and grand average of hydropathicity (GRAVY) of SARS-CoV-1 and -2 proteins in comparison. SARS-CoV-1 and SARS-CoV-2 are similar in many regards, so information can often be derived. Both are unusually stable, but sensitive at their lipophilic membranes. However, since seemingly small differences can have strong effects, for example, on immunologically relevant epitope settings, unevaluated knowledge transfer from SARS-CoV-1 to SARS-CoV-2 cannot be advised. Published knowledge regarding downstream processes, formulations and quality assuring methods is, as yet, limited. However, standard approaches employed for other viruses and vaccines seem to be feasible including virus inactivation, centrifugation conditions, and the use of adjuvants.
Collapse
Affiliation(s)
- Christin Scheller
- Institute of Medicinal and Pharmaceutical ChemistryTechnische Universität BraunschweigBraunschweigGermany
| | - Finja Krebs
- Institute of Medicinal and Pharmaceutical ChemistryTechnische Universität BraunschweigBraunschweigGermany
| | - Robert Minkner
- Institute of Medicinal and Pharmaceutical ChemistryTechnische Universität BraunschweigBraunschweigGermany
| | - Isabel Astner
- Institute of Medicinal and Pharmaceutical ChemistryTechnische Universität BraunschweigBraunschweigGermany
| | - Maria Gil‐Moles
- Institute of Medicinal and Pharmaceutical ChemistryTechnische Universität BraunschweigBraunschweigGermany
| | - Hermann Wätzig
- Institute of Medicinal and Pharmaceutical ChemistryTechnische Universität BraunschweigBraunschweigGermany
| |
Collapse
|
10
|
Muhr L, Pontvianne S, Selmeczi K, Paris C, Boschi‐Muller S, Canabady‐Rochelle L. Chromatographic separation simulation of metal‐chelating peptides from surface plasmon resonance binding parameters. J Sep Sci 2020; 43:2031-2041. [DOI: 10.1002/jssc.201900882] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2019] [Revised: 01/25/2020] [Accepted: 02/18/2020] [Indexed: 01/14/2023]
Affiliation(s)
- Laurence Muhr
- Université de LorraineEcole Nationale Supérieure des Industries ChimiquesLaboratoire Réactions et Génie des Procédés (UMR CNRS‐UL 7274) 1 rue Grandville Nancy 54000 France
| | - Steve Pontvianne
- Université de LorraineEcole Nationale Supérieure des Industries ChimiquesLaboratoire Réactions et Génie des Procédés (UMR CNRS‐UL 7274) 1 rue Grandville Nancy 54000 France
| | - Katalin Selmeczi
- Université de LorraineLaboratoire Lorrain de Chimie Moléculaire UMR 7053 CNRS‐UL Boulevard des Aiguillettes, 54506 Vandoeuvre‐lès‐Nancy cedex Nancy cedex BP 70239 France
| | - Cédric Paris
- Université de LorrainePASM platformENSAIA French engineering school 2, avenue de la Forêt de Haye Vandoeuvre‐lès‐Nancy 54000 France
| | | | - Laetitia Canabady‐Rochelle
- Université de LorraineEcole Nationale Supérieure des Industries ChimiquesLaboratoire Réactions et Génie des Procédés (UMR CNRS‐UL 7274) 1 rue Grandville Nancy 54000 France
| |
Collapse
|
11
|
Pangavhane S, Makrlík E, Ruzza P, Kašička V. Affinity capillary electrophoresis employed for determination of stability constants of antamanide complexes with univalent and divalent cations in methanol. Electrophoresis 2019; 40:2321-2328. [DOI: 10.1002/elps.201900043] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2019] [Revised: 04/18/2019] [Accepted: 04/29/2019] [Indexed: 12/31/2022]
Affiliation(s)
- Sachin Pangavhane
- Institute of Organic Chemistry and Biochemistry, Czech Academy of Sciences Prague Czechia
- University of Chemistry and Technology Prague Czechia
| | - Emanuel Makrlík
- Faculty of Environmental SciencesCzech University of Life Sciences Prague Czechia
| | - Paolo Ruzza
- Institute of Biomolecular Chemistry of CNR, Padua Unit Padua Italy
| | - Václav Kašička
- Institute of Organic Chemistry and Biochemistry, Czech Academy of Sciences Prague Czechia
| |
Collapse
|
12
|
Guo J, Li G, Zhang H, Jia X, Meng Q, Liu W. Coupling of capillary electrophoresis with electrospray ionization multiplexing ion mobility spectrometry. Electrophoresis 2019; 40:1639-1647. [PMID: 30892711 DOI: 10.1002/elps.201800462] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2018] [Revised: 03/18/2019] [Accepted: 03/18/2019] [Indexed: 11/09/2022]
Abstract
In this work, ion mobility spectrometry (IMS) function as a detector and another dimension of separation was coupled with CE to achieve two-dimensional separation. To improve the performance of hyphenated CE-IMS instrument, electrospray ionization correlation ion mobility spectrometry is evaluated and compared with traditional signal averaging data acquisition method using tetraalkylammonium bromide compounds. The effect of various parameters on the separation including sample introduction, sheath fluid of CE and drift gas, data acquisition method of IMS were investigated. The experimental result shows that the optimal conditions are as follows: hydrodynamic sample injection method, the electrophoresis voltage is 10 kilo volts, 5 mmol/L ammonium acetate buffer solution containing 80% acetonitrile as both the background electrolyte and the electrospray ionization sheath fluid, the ESI liquid flow rate is 4.5 μL/min, the drift voltage is 10.5 kilo volts, the drift gas temperature is 383 K and the drift gas flow rate is 300 mL/min. Under the above conditions, the mixture standards of seven tetraalkylammoniums can be completely separated within 10 min both by CE and IMS. The linear range was 5-250 μg/mL, with LOD of 0.152, 0.204, 0.277, 0.382, 0.466, 0.623 and 0.892 μg/mL, respectively. Compared with traditional capillary electrophoresis detection methods, the developed CE-ESI-IMS method not only provide two sets of qualitative parameters including electrophoresis migration time and ion drift time, ion mobility spectrometer can also provide an additional dimension of separation and could apply to the detection ultra-violet transparent compounds or none fluorescent compounds.
Collapse
Affiliation(s)
- Jianheng Guo
- College of Chemical Engineering, Xiangtan University, Xiangtan, Hunan, P. R. China.,College of Pharmacy, Southwest MinZu University, Chengdu, P. R. China
| | - Guozhu Li
- Xinjiang Production & Construction Corps Key Laboratory of Protection and Utilization of Biological Resources in Tarim Basin, Alar, Xinjiang, P. R. China
| | - Hanghang Zhang
- Xinjiang Production & Construction Corps Key Laboratory of Protection and Utilization of Biological Resources in Tarim Basin, Alar, Xinjiang, P. R. China
| | - Xu Jia
- Xinjiang Production & Construction Corps Key Laboratory of Protection and Utilization of Biological Resources in Tarim Basin, Alar, Xinjiang, P. R. China
| | - Qingyan Meng
- Xinjiang Production & Construction Corps Key Laboratory of Protection and Utilization of Biological Resources in Tarim Basin, Alar, Xinjiang, P. R. China
| | - Wenjie Liu
- College of Chemical Engineering, Xiangtan University, Xiangtan, Hunan, P. R. China.,Xinjiang Production & Construction Corps Key Laboratory of Protection and Utilization of Biological Resources in Tarim Basin, Alar, Xinjiang, P. R. China
| |
Collapse
|
13
|
Alhazmi HA, Javed SA, Ahsan W, Rehman Z, Al Bratty M, El Deeb S, Saleh SF. Investigation of binding behavior of important metal ions to thioredoxin reductase using mobility-shift affinity capillary electrophoresis: A preliminary insight into the development of new metal-based anticancer drugs. Microchem J 2019. [DOI: 10.1016/j.microc.2018.10.035] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
|
14
|
FT-IR Spectroscopy for the Identification of Binding Sites and Measurements of the Binding Interactions of Important Metal Ions with Bovine Serum Albumin. Sci Pharm 2019. [DOI: 10.3390/scipharm87010005] [Citation(s) in RCA: 83] [Impact Index Per Article: 16.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
Abstract
Proteins play crucial roles in the transportation and distribution of therapeutic substances, including metal ions in living systems. Some metal ions can strongly associate, while others show low affinity towards proteins. Consequently, in the present work, the binding behaviors of Ca2+, Ba2+, Ag+, Ru3+, Cu2+ and Co2+ with bovine serum albumin (BSA) were screened. BSA and the metal ions were allowed to interact at physiological pH and their binding interactions were screened by using FT-IR spectroscopy. Spectra were collected by using hydrated films over a range of 4000–400 cm−1. The interaction was demonstrated by a significant reduction in the spectral intensities of the amide I (C=O stretching) and amide II bands (C–N stretching coupled to NH bending) of the protein after complexation with metal ions. The binding interaction was further revealed by spectral shifting of the amide I band from 1651 cm−1 (free BSA) to 1653, 1654, 1649, 1655, 1655, and 1654 cm−1 for BSA–Ca2+, BSA–Ba2+, BSA–Ag+, BSA–Ru3+, BSA–Cu2+ and BSA–Co2+ complexes, respectively. The shifting of the amide I band was due to the interactions of metal ions with the O and N atoms of the ligand protein. Estimation of the secondary protein structure showed alteration in the protein conformation, characterized by a marked decrease (12.9–40.3%) in the α-helix accompanied by increased β-sheet and β-turn after interaction with the metal ions. The interaction results of this study were comparable with those reported in our previous investigation of metal ion–BSA interactions using affinity capillary electrophoresis (ACE), which has proven the accuracy of the FT-IR technique in the measurement of interactions between proteins and metal ions.
Collapse
|
15
|
Nachbar M, Maul J, Stein M, Wätzig H. Analysis of AtHIRD11 Intrinsic Disorder and Binding Towards Metal Ions by Capillary Gel Electrophoresis and Affinity Capillary Electrophoresis. J Vis Exp 2018. [PMID: 30199021 DOI: 10.3791/57749] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022] Open
Abstract
Plants are strongly dependent on their environment. In order to adjust to stressful changes (e.g., drought and high salinity), higher plants evolve classes of intrinsically disordered proteins (IDPs) to reduce oxidative and osmotic stress. This article uses a combination of capillary gel electrophoresis (CGE) and mobility shift affinity electrophoresis (ACE) in order to describe the binding behavior of different conformers of the IDP AtHIRD11 from Arabidopsis thaliana. CGE is used to confirm the purity of AtHIRD11 and to exclude fragments, posttranslational modifications, and other impurities as reasons for complex peak patterns. In this part of the experiment, the different sample components are separated by a viscous gel inside a capillary by their different masses and detected with a diode array detector. Afterward, the binding behavior of the sample towards various metal ions is investigated by ACE. In this case, the ligand is added to the buffer solution and the shift in migration time is measured in order to determine whether a binding event has occurred or not. One of the advantages of using the combination of CGE and ACE to determine the binding behavior of an IDP is the possibility to automate the gel electrophoresis and the binding assay. Furthermore, CGE shows a lower limit of detection than the classical gel electrophoresis and ACE is able to determine the manner of binding a ligand in a fast manner. In addition, ACE can also be applied to other charged species than metal ions. However, the use of this method for binding experiments is limited in its ability to determine the number of binding sites. Nevertheless, the combination of CGE and ACE can be adapted for characterizing the binding behavior of any protein sample towards numerous charged ligands.
Collapse
Affiliation(s)
- Markus Nachbar
- Institute of Medicinal and Pharmaceutical Chemistry, TU Braunschweig;
| | - Jorrit Maul
- Institute of Medicinal and Pharmaceutical Chemistry, TU Braunschweig
| | - Matthias Stein
- Institute of Medicinal and Pharmaceutical Chemistry, TU Braunschweig
| | - Hermann Wätzig
- Institute of Medicinal and Pharmaceutical Chemistry, TU Braunschweig
| |
Collapse
|
16
|
Asmari M, Ratih R, Alhazmi HA, El Deeb S. Thermophoresis for characterizing biomolecular interaction. Methods 2018; 146:107-119. [PMID: 29438829 DOI: 10.1016/j.ymeth.2018.02.003] [Citation(s) in RCA: 74] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2017] [Revised: 02/06/2018] [Accepted: 02/09/2018] [Indexed: 12/20/2022] Open
Abstract
The study of biomolecular interactions is crucial to get more insight into the biological system. The interactions of protein-protein, protein-nucleic acids, protein-sugars, nucleic acid-nucleic acids and protein-small molecules are supporting therapeutics and technological developments. Recently, the development in a large number of analytical techniques for characterizing biomolecular interactions reflect the promising research investments in this field. In this review, microscale thermophoresis technology (MST) is presented as an analytical technique for characterizing biomolecular interactions. Recent years have seen much progress and several applications established. MST is a powerful technique in quantitation of binding events based on the movement of molecules in microscopic temperature gradient. Simplicity, free solutions analysis, low sample volume, short analysis time, and immobilization free are the MST advantages over other competitive techniques. A wide range of studies in biomolecular interactions have been successfully carried out using MST, which tend to the versatility of the technique to use in screening binding events in order to save time, cost and obtained high data quality.
Collapse
Affiliation(s)
- Mufarreh Asmari
- Institute of Medicinal and Pharmaceutical Chemistry, TU Braunschweig, Beethovenstrasse 55, 38106 Braunschweig, Germany
| | - Ratih Ratih
- Institute of Medicinal and Pharmaceutical Chemistry, TU Braunschweig, Beethovenstrasse 55, 38106 Braunschweig, Germany
| | - Hassan A Alhazmi
- College of Pharmacy, Jazan University, P.O. Box 114, 45142 Jazan, Saudi Arabia
| | - Sami El Deeb
- Institute of Medicinal and Pharmaceutical Chemistry, TU Braunschweig, Beethovenstrasse 55, 38106 Braunschweig, Germany.
| |
Collapse
|
17
|
Nour Soliman T, Fattah Hassan MAE. Preparation and Characterization of Sustained Released Zinc Citrate Encapsulated in Whey Protein Nanoparticles. Pak J Biol Sci 2018; 21:448-453. [PMID: 30724046 DOI: 10.3923/pjbs.2018.448.453] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
BACKGROUND AND OBJECTIVES The use of milk proteins for drug delivery is a new trend in functional foods and pharmaceutical. Recently, researchers have focused on the utilization of whey proteins in the preparation of nanoparticle and carrier for drugs and micronutrients. The objectives of this paper were to use whey proteins isolate (WPI) nanoparticles for the encapsulation of zinc citrate micronutrients and characterization of the prepared nanoparticles. MATERIALS AND METHODS Nanoparticles were prepared from WPI with pH cycling and used for the encapsulation and sustained release of zinc citrate with three ratios (7, 14 and 28 mM) of zinc citrate per gram WPI. The particle size of the prepared nanoparticles was characterization and examined by transmission electron microscopy. The release of Zinc from the prepared nanoparticles was carried out using simulated gastric fluid at pH 1.2 using dialysis membranes, the amount of zinc citrate loaded whey protein (14.36 mg Zinc in 1 g WPI) within range of daily dose of zinc for healthy adults. RESULTS The WPI nanoparticles were able to encapsulate efficiently zinc, with encapsulation efficiency that ranged between 99.79 and 96.31%. Zinc was highly released from the prepared nanoparticles in acidic media (pH 1.2). CONCLUSION It can be concluded that WPI can be used as an effective vehicle for the protection and sustained release of zinc in food and pharmaceutical preparations.
Collapse
|
18
|
Mozafari M, El Deeb S, Krull F, Wildgruber R, Weber G, Reiter CG, Wätzig H. Interaction of albumins and heparinoids investigated by affinity capillary electrophoresis and free flow electrophoresis. Electrophoresis 2017; 39:569-580. [PMID: 29131355 DOI: 10.1002/elps.201700202] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2017] [Revised: 10/20/2017] [Accepted: 11/06/2017] [Indexed: 01/04/2023]
Abstract
A fast and precise affinity capillary electrophoresis (ACE) method has been applied to investigate the interactions between two serum albumins (HSA and BSA) and heparinoids. Furthermore, different free flow electrophoresis methods were developed to separate the species which appears owing to interaction of albumins with pentosan polysulfate sodium (PPS) under different experimental conditions. For ACE experiments, the normalized mobility ratios (∆R/Rf ), which provided information about the binding strength and the overall charge of the protein-ligand complex, were used to evaluate the binding affinities. ACE experiments were performed at two different temperatures (23 and 37°C). Both BSA and HSA interact more strongly with PPS than with unfractionated and low molecular weight heparins. For PPS, the interactions can already be observed at low mg/L concentrations (3 mg/L), and saturation is already obtained at approximately 20 mg/L. Unfractionated heparin showed almost no interactions with BSA at 23°C, but weak interactions at 37°C at higher heparin concentrations. The additional signals also appeared at higher concentrations at 37°C. Nevertheless, in most cases the binding data were similar at both temperatures. Furthermore, HSA showed a characteristic splitting in two peaks especially after interacting with PPS, which is probably attributable to the formation of two species or conformational change of HSA after interacting with PPS. The free flow electrophoresis methods have confirmed and completed the ACE experiments.
Collapse
Affiliation(s)
- Mona Mozafari
- Institute of Medicinal and Pharmaceutical Chemistry, TU Braunschweig, Brunswick, Germany
| | - Sami El Deeb
- Institute of Medicinal and Pharmaceutical Chemistry, TU Braunschweig, Brunswick, Germany
| | - Friederike Krull
- Institute of Medicinal and Pharmaceutical Chemistry, TU Braunschweig, Brunswick, Germany
| | | | | | | | - Hermann Wätzig
- Institute of Medicinal and Pharmaceutical Chemistry, TU Braunschweig, Brunswick, Germany
| |
Collapse
|
19
|
Kašička V. Recent developments in capillary and microchip electroseparations of peptides (2015-mid 2017). Electrophoresis 2017; 39:209-234. [PMID: 28836681 DOI: 10.1002/elps.201700295] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2017] [Revised: 08/15/2017] [Accepted: 08/16/2017] [Indexed: 12/17/2022]
Abstract
The review brings a comprehensive overview of recent developments and applications of high performance capillary and microchip electroseparation methods (zone electrophoresis, isotachophoresis, isoelectric focusing, affinity electrophoresis, electrokinetic chromatography, and electrochromatography) to analysis, microscale isolation, purification, and physicochemical and biochemical characterization of peptides in the years 2015, 2016, and ca. up to the middle of 2017. Advances in the investigation of electromigration properties of peptides and in the methodology of their analysis (sample preseparation, preconcentration and derivatization, adsorption suppression and EOF control, and detection) are described. New developments in particular CE and CEC methods are presented and several types of their applications to peptide analysis are reported: qualitative and quantitative analysis, determination in complex (bio)matrices, monitoring of chemical and enzymatical reactions and physical changes, amino acid, sequence and chiral analysis, and peptide mapping of proteins. Some micropreparative peptide separations are shown and capabilities of CE and CEC methods to provide important physicochemical characteristics of peptides are demonstrated.
Collapse
Affiliation(s)
- Václav Kašička
- Institute of Organic Chemistry and Biochemistry, The Czech Academy of Sciences, Prague, Czech Republic
| |
Collapse
|
20
|
Nachbar M, Mozafari M, Krull F, Maul KJ, Preu L, Hara M, Wätzig H. Metal ion - Dehydrin interactions investigated by affinity capillary electrophoresis and computer models. JOURNAL OF PLANT PHYSIOLOGY 2017; 216:219-228. [PMID: 28756342 DOI: 10.1016/j.jplph.2017.06.006] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/23/2016] [Revised: 06/11/2017] [Accepted: 06/12/2017] [Indexed: 05/26/2023]
Abstract
Dehydrins are specialized proteins which are related to environmental stress tolerance in plants. The proteins can bind different metal ions and have versatile other functions such as reduction of reactive oxygen species and acting as transcription factor. The structure determination of proteins from this family is challenging, since they have a high number of disordered structure elements. Consequently, to determine the functionality of these proteins on a molecular basis a computed model is helpful. This work focuses on a model for the Arabidopsis thaliana dehydrin AtHIRD11. To develop a model which reflects experimental data from literature and own binding data from affinity capillary electrophoresis experiments, a more rigid state of this protein was chosen. The Cu2+-complex of this protein was formed and evaluated. The model explains some of the properties of the complexes. Possible Cu2+-bindings site were found and the change of conformations were investigated via molecular dynamics simulation. The AtHIRD11-Cu2+-complex is a first approach towards a complex model for a structural versatile protein, which is already sufficient to explain binding data and possible structure elements.
Collapse
Affiliation(s)
- Markus Nachbar
- Institute of Medicinal and Pharmaceutical Chemistry, TU Braunschweig, Beethovenstrasse 55, 38106 Braunschweig, Germany.
| | - Mona Mozafari
- Institute of Medicinal and Pharmaceutical Chemistry, TU Braunschweig, Beethovenstrasse 55, 38106 Braunschweig, Germany
| | - Friederike Krull
- Institute of Medicinal and Pharmaceutical Chemistry, TU Braunschweig, Beethovenstrasse 55, 38106 Braunschweig, Germany
| | - Kai-Jorrit Maul
- Institute of Medicinal and Pharmaceutical Chemistry, TU Braunschweig, Beethovenstrasse 55, 38106 Braunschweig, Germany
| | - Lutz Preu
- Institute of Medicinal and Pharmaceutical Chemistry, TU Braunschweig, Beethovenstrasse 55, 38106 Braunschweig, Germany
| | - Masakazu Hara
- Research Institute of Green Science and Technology, Shizuoka University, 836 Ohya, Shizuoka 422-8529, Japan
| | - Hermann Wätzig
- Institute of Medicinal and Pharmaceutical Chemistry, TU Braunschweig, Beethovenstrasse 55, 38106 Braunschweig, Germany
| |
Collapse
|
21
|
Pangavhane S, Böhm S, Makrlík E, Ruzza P, Kašička V. Affinity capillary electrophoresis and density functional theory study of noncovalent interactions of cyclic peptide [Gly6
]-antamanide with small cations. Electrophoresis 2017; 38:2025-2033. [DOI: 10.1002/elps.201700141] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2017] [Revised: 04/26/2017] [Accepted: 05/02/2017] [Indexed: 11/10/2022]
Affiliation(s)
- Sachin Pangavhane
- The Institute of Organic Chemistry and Biochemistry, Czech Academy of Sciences; Prague Czech Republic
- Faculty of Food and Biochemical Technology; University of Chemistry and Technology; Prague Czech Republic
| | - Stanislav Böhm
- Faculty of Food and Biochemical Technology; University of Chemistry and Technology; Prague Czech Republic
| | - Emanuel Makrlík
- Faculty of Environmental Sciences; Czech University of Life Sciences; Prague Czech Republic
| | - Paolo Ruzza
- Institute of Biomolecular Chemistry of CNR; Padua Unit; Padua Italy
| | - Václav Kašička
- The Institute of Organic Chemistry and Biochemistry, Czech Academy of Sciences; Prague Czech Republic
| |
Collapse
|
22
|
Mozafari M, Balasupramaniam S, Preu L, El Deeb S, Reiter CG, Wätzig H. Using affinity capillary electrophoresis and computational models for binding studies of heparinoids with p-selectin and other proteins. Electrophoresis 2017; 38:1560-1571. [DOI: 10.1002/elps.201600480] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2016] [Revised: 02/28/2017] [Accepted: 03/01/2017] [Indexed: 02/01/2023]
Affiliation(s)
- Mona Mozafari
- Institute of Medicinal and Pharmaceutical Chemistry; TU Braunschweig; Braunschweig Germany
| | | | - Lutz Preu
- Institute of Medicinal and Pharmaceutical Chemistry; TU Braunschweig; Braunschweig Germany
| | - Sami El Deeb
- Institute of Medicinal and Pharmaceutical Chemistry; TU Braunschweig; Braunschweig Germany
| | | | - Hermann Wätzig
- Institute of Medicinal and Pharmaceutical Chemistry; TU Braunschweig; Braunschweig Germany
| |
Collapse
|
23
|
Konášová R, Dytrtová JJ, Kašička V. Study of solvent effects on the stability constant and ionic mobility of the dibenzo-18-crown-6 complex with potassium ion by affinity capillary electrophoresis. J Sep Sci 2016; 39:4429-4438. [DOI: 10.1002/jssc.201600830] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2016] [Revised: 09/03/2016] [Accepted: 09/05/2016] [Indexed: 01/10/2023]
Affiliation(s)
- Renáta Konášová
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences; Prague 6 Czech Republic
- Department of Analytical chemistry, Faculty of Science; Charles University in Prague; Prague 2 Czech Republic
| | - Jana Jaklová Dytrtová
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences; Prague 6 Czech Republic
- Charles University in Prague; Faculty of Physical Education and Sport; Prague 6 Czech Republic
| | - Václav Kašička
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences; Prague 6 Czech Republic
| |
Collapse
|
24
|
Štěpánová S, Kašička V. Recent applications of capillary electromigration methods to separation and analysis of proteins. Anal Chim Acta 2016; 933:23-42. [DOI: 10.1016/j.aca.2016.06.006] [Citation(s) in RCA: 78] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2016] [Revised: 05/10/2016] [Accepted: 06/03/2016] [Indexed: 10/21/2022]
|
25
|
Recent advances in capillary electrophoretic migration techniques for pharmaceutical analysis (2013-2015). Electrophoresis 2016; 37:1591-608. [DOI: 10.1002/elps.201600058] [Citation(s) in RCA: 82] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2016] [Revised: 03/04/2016] [Accepted: 03/04/2016] [Indexed: 11/07/2022]
|
26
|
Nachbar M, El Deeb S, Mozafari M, Alhazmi HA, Preu L, Redweik S, Lehmann WD, Wätzig H. Ca2+-complex stability of GAPAGPLIVPY peptide in gas and aqueous phase, investigated by affinity capillary electrophoresis and molecular dynamics simulations and compared to mass spectrometric results. Electrophoresis 2016; 37:744-51. [DOI: 10.1002/elps.201500403] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2015] [Revised: 11/06/2015] [Accepted: 11/26/2015] [Indexed: 11/09/2022]
Affiliation(s)
- Markus Nachbar
- Institute of Medicinal and Pharmaceutical Chemistry; TU Braunschweig; Braunschweig Germany
| | - Sami El Deeb
- Institute of Medicinal and Pharmaceutical Chemistry; TU Braunschweig; Braunschweig Germany
| | - Mona Mozafari
- Institute of Medicinal and Pharmaceutical Chemistry; TU Braunschweig; Braunschweig Germany
| | - Hassan A. Alhazmi
- Institute of Medicinal and Pharmaceutical Chemistry; TU Braunschweig; Braunschweig Germany
| | - Lutz Preu
- Institute of Medicinal and Pharmaceutical Chemistry; TU Braunschweig; Braunschweig Germany
| | - Sabine Redweik
- Institute of Medicinal and Pharmaceutical Chemistry; TU Braunschweig; Braunschweig Germany
| | - Wolf Dieter Lehmann
- Core Facility Molecular Structure Analysis; German Cancer Research Center (DKFZ); Heidelberg Germany
| | - Hermann Wätzig
- Institute of Medicinal and Pharmaceutical Chemistry; TU Braunschweig; Braunschweig Germany
| |
Collapse
|
27
|
Kašička V. Recent developments in capillary and microchip electroseparations of peptides (2013-middle 2015). Electrophoresis 2015; 37:162-88. [DOI: 10.1002/elps.201500329] [Citation(s) in RCA: 60] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2015] [Revised: 08/25/2015] [Accepted: 08/25/2015] [Indexed: 12/16/2022]
Affiliation(s)
- Václav Kašička
- Institute of Organic Chemistry and Biochemistry, v.v.i; The Czech Academy of Sciences; Prague Czech Republic
| |
Collapse
|
28
|
Mozafari M, Nachbar M, El Deeb S. Precise small volume sample handling for capillary electrophoresis. Electrophoresis 2015; 36:2665-2669. [PMID: 26335350 DOI: 10.1002/elps.201500309] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2015] [Revised: 08/27/2015] [Accepted: 08/27/2015] [Indexed: 01/06/2023]
Abstract
CE is one of the most important analytical techniques. Although the injected sample volume in CE is only in the nanoliter range, most commercial CE instruments need approximately 50 μL of the sample in the injection vial to perform the analysis. Hence, in order to fully profit from the low injection volumes, smaller vial volumes are required. Thus experiments were performed using silicone oil, which has higher density than water (1.09 g/mL) to replace sample dead volume in the vial. The results were compared to those performed without using the silicone oil in the sample vial. As an example five standard proteins namely beta-lactoglobulin, BSA, HSA, myoglobin, and ovalbumin, and one of the coagulation cascade involved proteins called vitonectin were investigated using CE. Mobility ratios and peak areas were compared. However, no significant changes were observed (RSDs% for mobility ratios and peak areas were better than 0.9 and 5.8%, respectively). Afterwards, an affinity CE method was used to investigate the interactions of two proteins, namely HSA and vitronectin, with three ligands namely enoxaparin sodium, unfractionated heparin, and pentosan polysulfate sodium. Mobility shift precision results showed that the employment of the filling has no noticeable effect on any of the protein-ligand interactions. Using a commercial PrinCE instrument and an autosampler the required sample volume is reduced down to 10 μL, and almost this complete volume can be subsequently injected during repeated experiments.
Collapse
Affiliation(s)
- Mona Mozafari
- Institute of Medicinal and Pharmaceutical Chemistry, Braunschweig, Germany
| | - Markus Nachbar
- Institute of Medicinal and Pharmaceutical Chemistry, Braunschweig, Germany
| | - Sami El Deeb
- Institute of Medicinal and Pharmaceutical Chemistry, Braunschweig, Germany
| |
Collapse
|
29
|
Alhazmi HA, Deeb SE, Nachbar M, Redweik S, Albishri HM, El-Hady DA, Wätzig H. Optimization of affinity capillary electrophoresis for routine investigations of protein-metal ion interactions. J Sep Sci 2015; 38:3629-37. [DOI: 10.1002/jssc.201500182] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2015] [Revised: 07/25/2015] [Accepted: 07/25/2015] [Indexed: 12/31/2022]
Affiliation(s)
- Hassan A. Alhazmi
- Institute of Medicinal and Pharmaceutical Chemistry; TU Braunschweig; Braunschweig Germany
- Department of Pharmaceutical Chemistry, College of pharmacy; Jazan University; Jazan Saudi Arabia
| | - Sami El Deeb
- Institute of Medicinal and Pharmaceutical Chemistry; TU Braunschweig; Braunschweig Germany
| | - Markus Nachbar
- Institute of Medicinal and Pharmaceutical Chemistry; TU Braunschweig; Braunschweig Germany
| | - Sabine Redweik
- Institute of Medicinal and Pharmaceutical Chemistry; TU Braunschweig; Braunschweig Germany
| | - Hassan M. Albishri
- Chemistry Department, Faculty of Science; King Abdulaziz University; Jeddah Saudi Arabia
| | - Deia Abd El-Hady
- Chemistry Department, Faculty of Science; University of Jeddah; Jeddah Saudi Arabia
- Chemistry Department, Faculty of Science; Assiut University; Assiut Egypt
| | - Hermann Wätzig
- Institute of Medicinal and Pharmaceutical Chemistry; TU Braunschweig; Braunschweig Germany
| |
Collapse
|
30
|
Wätzig H, Oltmann-Norden I, Steinicke F, Alhazmi HA, Nachbar M, El-Hady DA, Albishri HM, Baumann K, Exner T, Böckler FM, El Deeb S. Data quality in drug discovery: the role of analytical performance in ligand binding assays. J Comput Aided Mol Des 2015; 29:847-65. [DOI: 10.1007/s10822-015-9851-6] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2015] [Accepted: 06/02/2015] [Indexed: 01/24/2023]
|