CPC C07K 16/241 (2013.01) [C07K 2317/41 (2013.01); C07K 2317/72 (2013.01); C07K 2317/732 (2013.01); C07K 2317/734 (2013.01); C07K 2317/77 (2013.01); C07K 2317/92 (2013.01)] | 5 Claims |
1. An antibody comprising a TNFα-binding domain and an FcRn-binding site, wherein said antibody has a high affinity to human FcRn at pH 6, said high affinity being characterized by a dissociation equilibrium constant (KD) of less than 100 nM, further wherein said antibody has no affinity or a low affinity to human FcRn at pH 7.4, said low affinity being characterized by a KD of greater than 10 μM, further wherein the amino acid sequence of the antibody comprises the amino acids 311R, 428E, and 434W, wherein the numbering of amino acid residues is according to the EU index, further wherein the antibody comprises (i) a VL domain comprising a CDR1 region having the amino acid sequence as shown in SEQ ID NO:3, a CDR2 region having the amino acid sequence as shown in SEQ ID NO:4, and a CDR3 region having the amino acid sequence as shown in SEQ ID NO:5, and (ii) a VH domain comprising a CDR1 region having the amino acid sequence as shown in SEQ ID NO:6, a CDR2 region having the amino acid sequence as shown in SEQ ID NO:7, and a CDR3 region having the amino acid sequence as shown in SEQ ID NO:8.
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