改良Fc结合蛋白、及制造方法、使用该蛋白的抗体吸附剂和使用该吸附剂的抗体分离方法

• Format: Patent
• Language: Chinese
• Published: 05.02.2021
• Subjects: BEER; BIOCHEMISTRY; CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS THEREOF; CULTURE MEDIA; DERIVATIVES THEREOF; ENZYMOLOGY; FERMENTATION OR ENZYME-USING PROCESSES TO SYNTHESISE A DESIREDCHEMICAL COMPOUND OR COMPOSITION OR TO SEPARATE OPTICAL ISOMERSFROM A RACEMIC MIXTURE; INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES; MEASURING; METALLURGY; MICROBIOLOGY; MICROORGANISMS OR ENZYMES; MUTATION OR GENETIC ENGINEERING; ORGANIC CHEMISTRY; ORGANIC MACROMOLECULAR COMPOUNDS; PEPTIDES; PHYSICS; POLYSACCHARIDES; PROPAGATING, PRESERVING OR MAINTAINING MICROORGANISMS; SPIRITS; TESTING; THEIR PREPARATION OR CHEMICAL WORKING-UP; VINEGAR; WINE

提供：Fc结合性蛋白质的稳定性、特别是对热、酸的稳定性提高了的Fc结合性蛋白质、该蛋白质的制造方法、使用该蛋白质的抗体吸附剂和使用该吸附剂的抗体的分离方法。通过将在人FcγRIIIa中、位于细胞外区域中的特定位点的氨基酸残基置换为其他确定的氨基酸而对热、酸的稳定性提高了的Fc结合性蛋白质、该蛋白质的制造方法、使用该蛋白质的抗体吸附剂和使用该吸附剂的抗体的分离方法，由此解决前述课题。 Provided are: an Fc-binding protein having improved stability, particularly to heat and acid; a method for producing the protein; an antibody adsorbent using the protein; and a method for separating the antibodies using the adsorbent. Specifically provided are: an Fc-binding protein having improved stability to heat and acid, achieved by substituting an aminoacid residue in a specific position in the extracellular region of human FcyRIIIa with another specific amino acid; a method for producing the protein; an antibody adsorbent using the protein; and a method for separating the antibodies using the adsorbent.