An isolated polynucleotide encoding a heavy chain variable region or a light chain variable region of an antibody, wherein the heavy chain variable region comprises complementarity determining regions (CDRs) CDRH1, CDRH2, and CDRH3, and the light chain variable region comprises complementarity determining regions CDRL1, CDRL2, and CDRL3, wherein:
- (a) CDRH1 comprises the amino acid sequence of X1X2WX3X4(SEQ ID NO:
- 13), wherein
- X1 is S or N;
- X2 is S or Y;
- X3 is I or M;
- and
- X4 is N or H;
- (b) CDRH2 comprises the amino acid sequence of X1IYPRX2X3DTNYX4X5KFKX6 (SEQ ID NO:
- 14), wherein
- X1 is R or T;
- X2 is N, A, or S;
- X3 is G or S;
- X4 is N, A, or S;
- X5 is G or Q;
- and
- X6 is D or G;
- (c) CDRH3 comprises the amino acid sequence of LLDYSMDY (SEQ ID NO:
- 7);
- (d) CDRL1 comprises the amino acid sequence of RASQDISX1X2LN (SEQ ID NO:
- 16), wherein
- X1 is N or I;
- and
- X2 is Y or S;
- (e) CDRL2 comprises the amino acid sequence of YTSRLHS (SEQ ID NO:
- 10);
- and
- (f) CDRL3 comprises the amino acid sequence of QQGNTLPXT (SEQ ID NO:
- 17), wherein:
- X is L or W.