Libraries of genetic packages comprising novel HC CDR1, CDR2, and CDR3 and novel LC CDR1, CDR2, and CDR3 designs
First Claim
1. A library of vectors or genetic packages, wherein the vectors or genetic packages comprise variegated DNA sequences, each encoding a heavy chain (HC) variable region, which comprises three complementarity determining regions (CDRs) 1-3 and framework regions (FRs) 1-4, arranged from the amino terminus to the carboxy-terminus in an order of FR1-CDR2-FR2-CDR2-FR3-CDR3-FR4, wherein the HC CDR3 region contains 3-35 amino acid residues, and wherein at least 1, 2, 3, 4, 5, 6, 7, or 8 positions in the HC CDR3s encoded by the variegated DNA sequences are varied among Tyr, Gly, Asp, Ser, Arg, and Leu residues.
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Accused Products
Abstract
Provided are compositions and methods for preparing and identifying antibodies having CDR3s that vary in sequence and in length from very short to very long which in certain embodiments may bind to a carbohydrate moiety or the active site of an enzyme. Libraries coding for antibodies with the CDR3s are also provided. The libraries can be provided by modifying a pre-existing nucleic acid library.
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Citations
16 Claims
- 1. A library of vectors or genetic packages, wherein the vectors or genetic packages comprise variegated DNA sequences, each encoding a heavy chain (HC) variable region, which comprises three complementarity determining regions (CDRs) 1-3 and framework regions (FRs) 1-4, arranged from the amino terminus to the carboxy-terminus in an order of FR1-CDR2-FR2-CDR2-FR3-CDR3-FR4, wherein the HC CDR3 region contains 3-35 amino acid residues, and wherein at least 1, 2, 3, 4, 5, 6, 7, or 8 positions in the HC CDR3s encoded by the variegated DNA sequences are varied among Tyr, Gly, Asp, Ser, Arg, and Leu residues.
Specification