Antibodies that bind hK-1
View Patent ↗The invention features hK1 binding polypeptides as well as compositions comprising such polypeptides and methods of making and using such polypeptides.
1. An antibody comprising an immunoglobulin heavy chain (HC) variable domain sequence and an immunoglobulin light chain (LC) variable domain sequence, wherein the HC variable domain sequence and the LC variable domain sequence form an antigen binding site that binds to hK1 and inbibits enzymatic activity of hK1 (SEQ ID NO:1021) with a Ki of less than 10 nM, said HC variable domain sequence having:
a CDR1 that comprises an amino acid sequence: Xaa1-Tyr-Xaa2-Met-Xaa3 (SEQ ID NO:31), wherein Xaa 1 is selected from Lys and His; Xaa2 is selected from Lys, Val and Ser; Xaa3 is selected from Val, Ile and Thr;
a CDR2 that comprises an amino acid sequence: Xaa1-Ile-Tyr-Pro-Ser-Gly-Gly-Xaa2-Thr-Xaa3-Tyr-Ala-Asp-Ser-Val-Lys-Gly (SEQ ID NO:32), wherein Xaa1 is selected from Ser, Trp and Arg; Xaa2 is selected from Ile, Asn and Arg; Xaa3 is selected from Ala, Ile and Gly; and
a CDR3 that comprises the sequence at DITPGGGSGFRLPKNYYYYGMDV (SEQ ID NO:12); and
said LC variable domain sequence having:
a CDR1 that comprises an amino acid sequence: Arg-Ala-Ser-Gln-Ser-Xaa1-Ser-Ser-Xaa2-Xaa3-Xaa4-Xaa5 (SEQ ID NO:284), wherein Xaa1 is selected from Ile and Val; Xaa2 is selected from Tyr and Ser; Xaa3 is selected from Leu and Tyr; Xaa4 is selected from Asn, Ala and Leu; and Xaa5 is Ala or is absent;
a CDR2 that comprises an amino acid sequence: Xaa1-Ala-Ser-Xaa2-Xaa3-Xaa4 (SEQ ID NO:314), wherein Xaa1 is selected from Ala,Asp and Gly; Xaa2 is selected from Ser and Asn; Xaa3 is selected from Leu and Arg; Xaa4 is selected from Gln, Ala, Ser and Thr; and
a CDR3 that comprises the sequence QQSYSTPLT (SEQ ID NO:9).
2. The antibody according to claim 1 , wherein the antibody has a Ki for hK1 (SEQ ID NO:1021) of less than 1 nM.
3. The antibody according to claim 1 , wherein the antibody has a Ki for hK1 (SEQ ID NO:1021) of less than 0.1 nM.
4. The antibody of claim 1 that comprises LC CDR1 of SEQ ID NO:7; LC CDR2 of SEQ ID NO:8; LC CDR3 of SEQ ID NO:9; HC CDR1 of SEQ ID NO:10; HC CDR2 of SEQ ID NO:11; and HC CDR3 of SEQ ID NO:12.
5. The antibody of claim 1 wherein the heavy and light chain variable domain sequences are identical to corresponding variable domain sequences of SEQ ID NOs: 1240 and 1159.
6. The antibody of claim 1 wherein at least 80% of the FR regions are identical to FR sequence from a human germline sequence.
7. The antibody of claim 1 that is humanized.
8. The antibody of claim 1 that is a full length IgG antibody.
9. The antibody of claim 1 that is an antigen binding fragment of an antibody, and does not include an Fc domain.
10. A pharmaceutical composition that comprising the antibody according to claim 1 and a pharmaceutically acceptable carrier.
11. The antibody of claim 1 comprising a human FR1, FR2, FR3, and FR4 in the heavy chain variable domain sequence and a human FR1, FR2, FR3, and FR4 in the light chain variable domain sequence.
12. The antibody of claim 1 , wherein the heavy chain variable domain sequence comprises SEQ ID NO:1240.
13. The antibody of claim 1 , wherein the light chain variable domain sequence comprises SEQ ID NO:1159.
14. The antibody of claim 1 , wherein the antibody comprises a heavy chain encoded by the sequence of SEQ ID NO:146.
15. The antibody of claim 1 , wherein the antibody comprises a light chain encoded by the sequence of SEQ ID NO:145.
16. The antibody of claim 1 , wherein the antibody comprises a heavy chain encoded by the sequence of SEQ ID NO:146 and a light chain encoded by the sequence of SEQ ID NO:145.
17. The antibody of claim 1 that is effectively human.