Recombinant production of immunoglobulin-like domains in prokaryotic cells
First Claim
1. A method for producing an antibody with a decreased biological half life, comprising the steps of:
- a) obtaining a DNA segment that encodes an antibody with an Fc-hinge domain;
b) introducing a mutation into said DNA segment encoding said antibody wherein expression of said DNA segment results in an antibody in which the Fc-hinge domain comprises an amino acid mutation in the CH2-CH3 domain interface region of the Fc-hinge fragment which results in impaired SpA binding relative to native Fc-hinge domain SpA binding; and
c) expressing said antibody.
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Abstract
Disclosed are recombinant vectors encoding immunoglobulin-like domains and portions thereof, such as T-cell variable domains, antibody Fc-hinge fragments, subfragments and mutant domains with reduced biological half lives. Methods of producing large quantities of such domains, heterodimers, and fusion proteins following expression and secretion by prokaryotic host cells are also reported. Described are single chain T-cell receptors, which are folded into β-pleated sheet structures similar to those of immunoglobulin variable domains; antibody Fc and Fc-hinge domains, which have the same in vivo stability as intact antibodies; and domains engineered to have reduced half lives.
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Citations
12 Claims
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1. A method for producing an antibody with a decreased biological half life, comprising the steps of:
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a) obtaining a DNA segment that encodes an antibody with an Fc-hinge domain; b) introducing a mutation into said DNA segment encoding said antibody wherein expression of said DNA segment results in an antibody in which the Fc-hinge domain comprises an amino acid mutation in the CH2-CH3 domain interface region of the Fc-hinge fragment which results in impaired SpA binding relative to native Fc-hinge domain SpA binding; and c) expressing said antibody. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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Specification