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Tomioka Y, Sato R, Takahashi R, Nagatoishi S, Shiba K, Tsumoto K, Arakawa T, Akuta T. Agarose native gel electrophoresis analysis of thermal aggregation controlled by Hofmeister series. Biophys Chem 2023; 296:106977. [PMID: 36857888 DOI: 10.1016/j.bpc.2023.106977] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2022] [Revised: 02/15/2023] [Accepted: 02/17/2023] [Indexed: 02/22/2023]
Abstract
The effects of salting-in and salting-out salts defined by Hofmeister series on the solution state of bovine serum albumin (BSA) in 50 mM Tris-HCl buffer at pH 7.4 before and after thermal unfolding at 80 °C for 5 min were examined using agarose native gel electrophoresis and mass photometry. Gel electrophoresis showed that salting-in MgCl2, CaCl2 and NaSCN resulted in formation of intermediate structures of BSA upon heating on native gel, while heating in buffer alone resulted in aggregated bands. Mass photometry showed large loss of monomer and oligomers when heated in this buffer, but retaining these structures in the presence of 1 M MgCl2 and NaSCN. To our surprise, salting-out MgSO4 also showed a similar effect on gel electrophoresis and mass photometry. Salting-out NaCl and (NH4)2SO4 resulted in smearing and aggregated bands, which were supported by mass photometry. Aggregation-suppressive ArgHCl also showed oligomer aggregates upon gel electrophoresis and mass photometry.
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Affiliation(s)
- Yui Tomioka
- Research and Development Division, Kyokuto Pharmaceutical Industrial Co., Ltd., 3333-26, Aza-Asayama, Kamitezuna Takahagi-shi, Ibaraki 318-0004, Japan.
| | - Ryo Sato
- Research and Development Division, Kyokuto Pharmaceutical Industrial Co., Ltd., 3333-26, Aza-Asayama, Kamitezuna Takahagi-shi, Ibaraki 318-0004, Japan.
| | - Ryo Takahashi
- Refeyn Japan, K.K., 1-1-14, Sakuraguchi-cho, Nada-ku, Kobe, Hyogo 6570036, Japan.
| | - Satoru Nagatoishi
- The Institute of Medical Sciences, The University of Tokyo, 4-6-1 Shirokanedai, Minato-ku, Tokyo 108-8639, Japan.
| | - Kohei Shiba
- Refeyn Japan, K.K., 1-1-14, Sakuraguchi-cho, Nada-ku, Kobe, Hyogo 6570036, Japan.
| | - Kouhei Tsumoto
- The Institute of Medical Sciences, The University of Tokyo, 4-6-1 Shirokanedai, Minato-ku, Tokyo 108-8639, Japan; School of Engineering, The University of Tokyo, 7-3-1, Hongo, Bunkyo-ku, Tokyo 113-8656, Japan.
| | - Tsutomu Arakawa
- Alliance Protein Laboratories, 13380 Pantera Rd, San Diego, CA 92130, USA.
| | - Teruo Akuta
- Research and Development Division, Kyokuto Pharmaceutical Industrial Co., Ltd., 3333-26, Aza-Asayama, Kamitezuna Takahagi-shi, Ibaraki 318-0004, Japan.
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Nisnevitch M, Firer MA. The solid phase in affinity chromatography: strategies for antibody attachment. JOURNAL OF BIOCHEMICAL AND BIOPHYSICAL METHODS 2001; 49:467-80. [PMID: 11694295 DOI: 10.1016/s0165-022x(01)00214-7] [Citation(s) in RCA: 86] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Antibodies (Ab) are commonly used in affinity chromatography (AC) as a versatile and specific means of isolating target molecules from complex mixtures. A number of procedures have been developed to immobilize antibodies on the solid matrix. Some of these methods couple the antibody via chemical groups that may be important for specific recognition of antigen, resulting in loss of functionality in a proportion of the antibodies. In other methods, the outcome of immobilization is coupling via unique sites in the Fc region of the antibody molecule, ensuring orientation of the antibody combining sites (Fab) towards the mobile phase. This review discusses the advantages and disadvantages of the various methods available for immobilization and outlines protocols for site-directed, covalent coupling of the antibody to the solid phase that essentially retains the activity of the antibody.
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Affiliation(s)
- M Nisnevitch
- Immunology Laboratory, E. Katzir Biotechnology Program, Research Institute, College of Judea and Samaria, P.O. Box 3, Ariel, 44837, Israel
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Firer MA. Efficient elution of functional proteins in affinity chromatography. JOURNAL OF BIOCHEMICAL AND BIOPHYSICAL METHODS 2001; 49:433-42. [PMID: 11694292 DOI: 10.1016/s0165-022x(01)00211-1] [Citation(s) in RCA: 54] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
Many elution buffers are in use for the retrieval of proteins from affinity columns. While the aim of these buffers is to dissociate the various chemical bonds that make up protein-protein interactions and return the target protein to the mobile phase in active form, there is considerable difference of opinion as to which buffer is more suitable for particular applications. This review examines the chemical effect of various elution buffers on protein-protein interactions in the context of affinity chromatography and examines strategies that may be used for selection of an appropriate buffer.
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Affiliation(s)
- M A Firer
- Immunology Laboratory, E. Katzir Biotechnology Program, Research Institute, College of Judea and Samaria, PO Box 3, Ariel 44837, Israel.
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