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Scheller C, Krebs F, Wiesner R, Wätzig H, Oltmann-Norden I. A comparative study of CE-SDS, SDS-PAGE, and Simple Western-Precision, repeatability, and apparent molecular mass shifts by glycosylation. Electrophoresis 2021; 42:1521-1531. [PMID: 33956358 DOI: 10.1002/elps.202100068] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2021] [Revised: 04/22/2021] [Accepted: 04/27/2021] [Indexed: 01/18/2023]
Abstract
SDS gel electrophoresis is a commonly used approach for monitoring purity and apparent molecular mass (Mr) of proteins, especially in the field of quality control of biopharmaceutical proteins. The technological installation of CE-SDS as the replacement of the slab gel technique (SDS-PAGE) is still in progress, leading to a continuous improvement of CE-SDS instruments. Various CE-SDS instruments, namely Maurice (CE-SDS/CE-SDS PLUS) and Wes by ProteinSimple as well as the microchip gel electrophoresis system LabChip® GXII Touch™ HT by PerkinElmer were tested for precision and repeatability compared to SDS-PAGE (Bio-Rad). For assessing these quality control parameters, standard model proteins with minor post-translational modifications were used. Overall, it can be concluded that the CE-SDS-based methods are similar to SDS-PAGE with respect to these parameters. Quality characteristics of test systems gain more significance by testing proteins that do not behave like model proteins. Therefore, glycosylated proteins were analyzed to comparatively investigate the influence of glycosylation on Mr determination in the different instruments. In some cases, high deviations were found both among the methods and with regard to reference values. This article provides possible explanations for these findings.
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Affiliation(s)
- Christin Scheller
- Institute of Medicinal and Pharmaceutical Chemistry, Technische Universität Braunschweig, Braunschweig, Germany
| | - Finja Krebs
- Institute of Medicinal and Pharmaceutical Chemistry, Technische Universität Braunschweig, Braunschweig, Germany
| | - Rebecca Wiesner
- Institute of Medicinal and Pharmaceutical Chemistry, Technische Universität Braunschweig, Braunschweig, Germany
| | - Hermann Wätzig
- Institute of Medicinal and Pharmaceutical Chemistry, Technische Universität Braunschweig, Braunschweig, Germany
| | - Imke Oltmann-Norden
- Institute of Medicinal and Pharmaceutical Chemistry, Technische Universität Braunschweig, Braunschweig, Germany
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Ofori JA, Hsieh YHP. Characterization of a 60-kDa Thermally Stable Antigenic Protein as a Marker for the Immunodetection of Bovine Plasma-Derived Food Ingredients. J Food Sci 2015; 80:C1654-60. [DOI: 10.1111/1750-3841.12963] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2014] [Accepted: 05/30/2015] [Indexed: 11/28/2022]
Affiliation(s)
- Jack A. Ofori
- Dept. of Nutrition, Food and Exercise Sciences; Florida State Univ; Tallahassee FL 32306-1493 U.S.A
| | - Yun-Hwa P. Hsieh
- Dept. of Nutrition, Food and Exercise Sciences; Florida State Univ; Tallahassee FL 32306-1493 U.S.A
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Saguer E, Alvarez P, Fort N, Espigulé E, Parés D, Toldrà M, Carretero C. Heat-Induced Gelation Mechanism of Blood Plasma Modulated by Cysteine. J Food Sci 2015; 80:C515-21. [DOI: 10.1111/1750-3841.12805] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2014] [Revised: 12/18/2014] [Accepted: 01/02/2015] [Indexed: 11/30/2022]
Affiliation(s)
- E. Saguer
- Institut de Tecnologia Agroalimentària (INTEA); Univ. of Girona (UdG); 17071 Girona Spain
| | - P. Alvarez
- The Nutrition and Functional Foods Inst. (INAF), Laval Univ, Quebec, Canada G1V 0A6 and the Dept. of Food Science and Nutrition, 2425 rue de l'Agriculture; Laval Univ; Quebec Canada G1V 0A6
| | - N. Fort
- Institut de Tecnologia Agroalimentària (INTEA); Univ. of Girona (UdG); 17071 Girona Spain
| | - E. Espigulé
- Institut de Tecnologia Agroalimentària (INTEA); Univ. of Girona (UdG); 17071 Girona Spain
| | - D. Parés
- Institut de Tecnologia Agroalimentària (INTEA); Univ. of Girona (UdG); 17071 Girona Spain
| | - M. Toldrà
- Institut de Tecnologia Agroalimentària (INTEA); Univ. of Girona (UdG); 17071 Girona Spain
| | - C. Carretero
- Institut de Tecnologia Agroalimentària (INTEA); Univ. of Girona (UdG); 17071 Girona Spain
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Medina-Navarro R, Corona-Candelas I, Barajas-González S, Díaz-Flores M, Durán-Reyes G. Albumin antioxidant response to stress in diabetic nephropathy progression. PLoS One 2014; 9:e106490. [PMID: 25187963 PMCID: PMC4154714 DOI: 10.1371/journal.pone.0106490] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2014] [Accepted: 08/02/2014] [Indexed: 02/07/2023] Open
Abstract
Background A new component of the protein antioxidant capacity, designated Response Surplus (RS), was recently described. A major feature of this component is the close relationship between protein antioxidant capacity and molecular structure. Oxidative stress is associated with renal dysfunction in patients with renal failure, and plasma albumin is the target of massive oxidation in nephrotic syndrome and diabetic nephropathy. The aim of the present study was to explore the albumin redox state and the RS component of human albumin isolated from diabetic patients with progressive renal damage. Methods/Principal Findings Serum aliquots were collected and albumin isolated from 125 diabetic patients divided into 5 groups according to their estimated glomerular filtration rate (GFR). In addition to clinical and biochemical variables, the albumin redox state, including antioxidant capacity, thiol group content, and RS component, were evaluated. The albumin antioxidant capacity and thiol group content were reciprocally related to the RS component in association with GFR reduction. The GFR decline and RS component were significantly negatively correlated (R = –0.83, p<0.0001). Age, creatinine, thiol groups, and antioxidant capacity were also significantly related to the GFR decline (R = –0.47, p<0.001; R = –0.68, p<0.0001; R = 0.44, p<0.001; and R = 0.72, p<0.0001). Conclusion/Significance The response of human albumin to stress in relation to the progression of diabetic renal disease was evaluated. The findings confirm that the albumin molecular structure is closely related to its redox state, and is a key factor in the progression of diabetes nephropathy.
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Affiliation(s)
- Rafael Medina-Navarro
- Department of Experimental Metabolism, Center for Biomedical Research of Michoacán (CIBIMI-IMSS), Morelia, Michoacán, México
- * E-mail:
| | - Itzia Corona-Candelas
- Department of Nephrology, General Regional Hospital N° 1, IMSS, Morelia, Michoacán, Mexico
| | - Saúl Barajas-González
- Department of Nephrology, General Regional Hospital N° 1, IMSS, Morelia, Michoacán, Mexico
| | - Margarita Díaz-Flores
- Biochemistry Medical Research Unit, National Medical Center, IMSS, México City, México
| | - Genoveva Durán-Reyes
- Biochemistry Medical Research Unit, National Medical Center, IMSS, México City, México
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5
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Ozgunes N, Oztas Y, Unal S, Yaman H. Structural modification of plasma albumin in sickle cell anemia. Acta Haematol 2014; 133:67-9. [PMID: 25139371 DOI: 10.1159/000362860] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2013] [Accepted: 04/10/2014] [Indexed: 01/25/2023]
Affiliation(s)
- Nuriman Ozgunes
- Department of Medical Biochemistry, Faculty of Medicine, Hacettepe University, Ankara, Turkey
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6
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Kröner F, Hubbuch J. Systematic generation of buffer systems for pH gradient ion exchange chromatography and their application. J Chromatogr A 2013; 1285:78-87. [DOI: 10.1016/j.chroma.2013.02.017] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2012] [Revised: 01/28/2013] [Accepted: 02/07/2013] [Indexed: 10/27/2022]
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7
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Deng X, Hahne T, Schröder S, Redweik S, Nebija D, Schmidt H, Janssen O, Lachmann B, Wätzig H. The challenge to quantify proteins with charge trains due to isoforms or conformers. Electrophoresis 2011; 33:263-9. [DOI: 10.1002/elps.201100321] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2011] [Revised: 07/30/2011] [Accepted: 08/05/2011] [Indexed: 11/09/2022]
Affiliation(s)
- Xi Deng
- Institute of Pharmaceutical Chemistry, Technische Universität Braunschweig, Braunschweig, Germany
| | - Thomas Hahne
- Institute of Pharmaceutical Chemistry, Technische Universität Braunschweig, Braunschweig, Germany
| | - Simone Schröder
- Institute of Pharmaceutical Chemistry, Technische Universität Braunschweig, Braunschweig, Germany
| | - Sabine Redweik
- Institute of Pharmaceutical Chemistry, Technische Universität Braunschweig, Braunschweig, Germany
| | - Dashnor Nebija
- Department of Medicinal and Pharmaceutical Chemistry, University of Vienna, Vienna, Austria
| | - Hendrik Schmidt
- Laboratory for Molecular Immunology, Institute for Immunology, University Hospital Schleswig‐Holstein, Kiel, Germany
| | - Ottmar Janssen
- Laboratory for Molecular Immunology, Institute for Immunology, University Hospital Schleswig‐Holstein, Kiel, Germany
| | - Bodo Lachmann
- Department of Medicinal and Pharmaceutical Chemistry, University of Vienna, Vienna, Austria
| | - Hermann Wätzig
- Institute of Pharmaceutical Chemistry, Technische Universität Braunschweig, Braunschweig, Germany
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Dolnik V, Gurske WA. Size separation of proteins by capillary zone electrophoresis with cationic hitchhiking. Electrophoresis 2011; 32:2884-92. [PMID: 21948216 PMCID: PMC3516881 DOI: 10.1002/elps.201100114] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2011] [Revised: 04/15/2011] [Accepted: 04/26/2011] [Indexed: 01/30/2023]
Abstract
The paper describes a method of size separation of proteins by capillary sieving electrophoresis with cationic surfactant. Proteins are separated within 12 min with repeatability of migration times better than 0.2%. Some proteins achieve the separation efficiency of 200,000 theoretical plates. The method can be used for determination of protein relative molecular masses. The accuracy of the determined relative molecular masses and the limitation of the method were investigated by the analysis of more than 60 proteins. The method also allows separation of protein oligomers. Proteins can be quantitated after the electrokinetic injection in the concentration range 0.07-0.43 g/L. The average detection limit is about 2 mg/L.
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Gabaldon M. Thiol dependent isomerization of bovine albumin. Int J Biol Macromol 2009; 44:43-50. [DOI: 10.1016/j.ijbiomac.2008.09.020] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2008] [Revised: 09/17/2008] [Accepted: 09/26/2008] [Indexed: 11/16/2022]
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Era S, Sogami M, Kuwata K. Comparative 1H NMR studies on the structural looseness of the aged (A) and non-aged (N) bovine mercaptalbumin in the alkaline region. Int J Biol Macromol 2009; 44:37-42. [DOI: 10.1016/j.ijbiomac.2008.09.021] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2008] [Revised: 09/22/2008] [Accepted: 09/26/2008] [Indexed: 10/21/2022]
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11
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Ahamed T, Nfor BK, Verhaert PDEM, van Dedem GWK, van der Wielen LAM, Eppink MHM, van de Sandt EJAX, Ottens M. pH-gradient ion-exchange chromatography: an analytical tool for design and optimization of protein separations. J Chromatogr A 2007; 1164:181-8. [PMID: 17673242 DOI: 10.1016/j.chroma.2007.07.010] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2007] [Revised: 07/04/2007] [Accepted: 07/05/2007] [Indexed: 10/23/2022]
Abstract
This work demonstrates that a highly linear, controllable and wide-ranged pH-gradient can be generated through an ion-exchange chromatography (IEC) column. Such a pH-gradient anion-exchange chromatography was evaluated with 17 model proteins and found that acidic (pI<6) and basic (pI>8) proteins elute roughly at their pI, whereas neutral proteins (pI 6-8) elute at pH 8-9 regardless their pI values. Because of the flat nature of protein titration curves from pH approximately 6 to approximately 9, neutral proteins indeed exhibit nearly zero net charge at pH approximately 9. The elution-pH in pH-gradient IEC or the titration curve, but not the pI, was identified as the key parameter for pH optimization of preparative IEC in a fast and rational way. The pH-gradient IEC was also applied and found to be an excellent analytical tool for the fractionation of crude protein mixtures.
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Affiliation(s)
- Tangir Ahamed
- Department of Biotechnology, Delft University of Technology, Delft, The Netherlands.
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12
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Combined treatment of porcine plasma with microbial transglutaminase and cysteine: Effects on the heat-induced gel properties. Food Hydrocoll 2007. [DOI: 10.1016/j.foodhyd.2006.05.007] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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13
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Pollitt MJ, Buckton G, Brocchini S, Alpar HO. Calorimetric study of bovine serum albumin dilution and adsorption onto polystyrene particles. Int J Pharm 2005; 298:333-8. [PMID: 15878810 DOI: 10.1016/j.ijpharm.2005.02.037] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2004] [Revised: 02/07/2005] [Accepted: 02/20/2005] [Indexed: 10/25/2022]
Abstract
Titration calorimetry was used to investigate the interaction between a model antigen, bovine serum albumin (BSA), and a model particulate carrier, polystyrene (PS). The binding enthalpy was much higher than reported in the literature for a similar system and did not display a sigmoidal binding curve. These experiments may have accessed low coverage surface sites due to the irreversible nature of protein binding and stepwise titration. An important correction is the heat of dilution of the protein solution. Two regimes were observed: at low concentrations of BSA (below ca. 0.3% (w/v)) an exothermic dilution enthalpy of ca. -100 mJ mg-1 was determined, whereas at higher concentrations of BSA values of ca. -20 mJ mg-1 were obtained. Solution rheological data also showed a change at 0.3% (w/v) BSA, so we hypothesise that the fraction of the BSA as monomers, dimers and polymers in solution changes at approximately 0.3% (w/v).
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Affiliation(s)
- M J Pollitt
- Department of Pharmaceutics, School of Pharmacy, 29-39 Brunswick Square, London WC1N 1AX, UK.
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Chang WWP, Hobson C, Bomberger DC, Schneider LV. Rapid separation of protein isoforms by capillary zone electrophoresis with new dynamic coatings. Electrophoresis 2005; 26:2179-86. [PMID: 15861468 DOI: 10.1002/elps.200410283] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Many cellular functions are regulated through protein isoforms. Changes in the expression level or regulatory dysfunctions of isoforms often lead to developmental or pathological disorders. Isoforms are traditionally analyzed using techniques such as gel- or capillary-based isoelectric focusing. However, with proper electro-osmotic flow (EOF) control, isoforms with small pI differences can also be analyzed using capillary zone electrophoresis (CZE). Here we demonstrate the ability to quickly resolve isoforms of three model proteins (bovine serum albumin, transferrin, alpha1-antitrypsin) in capillaries coated with novel dynamic coatings. The coatings allow reproducible EOF modulation in the cathodal direction to a level of 10(-9) m2V(-1)s(-1). They also appear to inhibit protein adsorption to the capillary wall, making the isoform separations highly reproducible both in peak areas and apparent mobility. Isoforms of transferrin and alpha1-antitrypsin have been implicated in several human diseases. By coupling the CZE isoform separation with standard affinity capture assays, it may be possible to develop a cost-effective analytical platform for clinical diagnostics.
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15
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Gabaldon M. Oxidation of cysteine and homocysteine by bovine albumin. Arch Biochem Biophys 2004; 431:178-88. [PMID: 15488466 DOI: 10.1016/j.abb.2004.08.028] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2004] [Revised: 08/27/2004] [Indexed: 11/21/2022]
Abstract
The autooxidation of cysteine and homocysteine to their disulfide forms was determined by measuring the time course of thiol groups disappearance. We found the oxidative chemistry of cysteine and homocysteine to be quite different. In the absence of added Cu(II), cysteine autooxidized at a slower rate than homocysteine, though in its presence cysteine oxidation was much faster, homocysteine being found to be a poor responder to copper catalysis. Albumin speeded up the spontaneous oxidation of both aminothiols, the reaction being faster with cysteine than with homocysteine. The copper content of different albumins was found to be highly variable, ranging from 12.75 to 0.64 microg Cu(II)/g albumin. We propose that copper bound to albumin possesses redox cycling activity to perform cysteine oxidation since: (i) copper elimination by copper chelators markedly reduces oxidation; and (ii) a positive correlation exists between the albumin copper content and the oxidation reaction rate.
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Affiliation(s)
- María Gabaldon
- Unidad de Histoquimia, Centro de Investigación, Hospital La Fe, Avenida Campanar, 21, 46009 Valencia, Spain.
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