Optimized Fc variants
First Claim
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1. A nucleic acid encoding a protein, wherein said protein comprises an Fc variant of a parent IgG Fc polypeptide, said Fc variant comprising an amino acid substitution selected from the group consisting of S267E and S267D in the Fc region, wherein said Fc variant exhibits increased binding to Fcγ
- RIIb as compared to the parent IgG Fc polypeptide and wherein numbering is according to the EU index.
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Abstract
The present invention relates to Fc variants having decreased affinity for FcγRIIb, methods for their generation, Fc polypeptides comprising optimized Fc variants, and methods for using optimized Fc variants.
124 Citations
30 Claims
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1. A nucleic acid encoding a protein, wherein said protein comprises an Fc variant of a parent IgG Fc polypeptide, said Fc variant comprising an amino acid substitution selected from the group consisting of S267E and S267D in the Fc region, wherein said Fc variant exhibits increased binding to Fcγ
- RIIb as compared to the parent IgG Fc polypeptide and wherein numbering is according to the EU index.
- View Dependent Claims (2, 3, 4, 5, 6)
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7. A host cell comprising a nucleic acid encoding a protein, wherein said protein comprises an Fc variant of a parent IgG Fc polypeptide, said Fc variant comprising an amino acid substitution selected from the group consisting of S267E and S267D in the Fc region, wherein said Fc variant exhibits increased binding to Fcγ
- RIIb as compared to the parent IgG Fc polypeptide and wherein numbering is according to the EU index.
- View Dependent Claims (8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A method of making a protein comprising:
- a) culturing a host cell comprising a nucleic acid encoding a protein, wherein said protein comprises an Fc variant of a parent IgG Fc polypeptide, said Fc variant comprising an amino acid substitution selected from the group consisting of S267E and S267D in the Fc region, wherein said Fc variant exhibits increased binding to Fcγ
RIIb as compared to the parent IgG Fc polypeptide and wherein numbering is according to the EU index, under conditions wherein said protein is produced; and
b) purifying said protein. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 30)
- a) culturing a host cell comprising a nucleic acid encoding a protein, wherein said protein comprises an Fc variant of a parent IgG Fc polypeptide, said Fc variant comprising an amino acid substitution selected from the group consisting of S267E and S267D in the Fc region, wherein said Fc variant exhibits increased binding to Fcγ
Specification