Methods and compositions for the generation and use of conformation-specific antibodies
View Patent ↗The present invention features methods and compositions for the generation and use of conformation-specific anti-bodies or fragments thereof.
1. An isolated conformation-specific antibody or fragment thereof that specifically binds to a Xaa-Pro motif of a polypeptide, wherein: said polypeptide is a PPlase substrate, the peptidyl-prolyl bond of said Xaa-Pro motif is in a cis conformation, said Xaa is serine or threonine and is phosphorylated, and said antibody or fragment thereof binds to the cis conformation of said Xaa-Pro motif of said polypeptide with at least 10- to 100-fold greater affinity than to the trans conformation of said Xaa-Pro motif of said polypeptide.
2. The isolated antibody of claim 1 , wherein said PPlase substrate is a Pin1 substrate.
3. The isolated antibody of claim 2 , wherein said Pin1 substrate is NIMA, RAB4, CDC25, WEE1, PLK1, MYT1, CDC27, CENP-F, Incenp, RBP1, NHERF-1, KRMP1, CK2, TopoIIα, DAB2, p54nrb, Sil, EMI1, cyclin D1, Ki67, c-Myc, cyclin E, c-Jun, β-catenin, Cf-2, NF-κB, RAF1, c-Fos, RARα, AIB1/SRC-3, HBx, STAT3, p53, Bcl-2, p73, BimEL, p66Shc, CHE1, tau, amyloid precursor protein (APP), APP fragment, synphilin-1, gephyrin, MCL1, NFAT, AUF1, IRF3, BTK, SIN3-RPD3, or hSpt5.
4. The isolated antibody of claim 1 , produced by a process which comprises the steps of:
(i) providing an antibody library;
(ii) contacting said antibody library with a polypeptide comprising a Xaa-Pro motif;
(iii) determining binding of an antibody from said antibody library to said Xaa-Pro motif of said polypeptide, wherein said antibody specifically binds to the cis conformation of said Xaa-Pro motif of said polypeptide; and
(iv) isolating said antibody, wherein said antibody is a conformation-specific antibody.
5. An isolated antibody composition of claim 1 to induce passive immunity against a disorder associated with a deregulation of PPlase activity.
6. The isolated antibody of claim 3 , wherein said Pin1 substrate is tau.
7. The isolated antibody of claim 3 , wherein said Pin1 substrate is APP.
8. The isolated antibody of claim 3 , wherein said Pin1 substrate is c-Jun.
9. The isolated antibody of claim 3 , wherein said Pin1 substrate is NF-κB.
10. The isolated antibody of claim 3 , wherein said Pin1 substrate is p53.
11. An isolated conformation-specific antibody or fragment thereof that specifically binds to a Xaa-Pro motif of a polypeptide, wherein: said polypeptide is a PPlase substrate, the peptidyl-prolyl bond of said Xaa-Pro motif is in a trans conformation, said Xaa is serine or threonine and is phosphorylated, and said antibody or fragment thereof binds to the trans conformation of said Xaa-Pro motif of said polypeptide with at least 10- to 100-fold greater affinity than to the cis conformation of said Xaa-Pro motif of said polypeptide.
12. The isolated antibody of claim 11 , wherein said PPlase substrate is a Pin1 substrate.
13. The isolated antibody of claim 12 , wherein said Pin1 substrate is NIMA, RAB4, CDC25, WEE1, PLK1, MYT1, CDC27, CENP-F, Incenp, RBP1, NHERF-1, KRMP1, CK2, TopoIIα, DAB2, p54nrb, Sil, EMI1, cyclin D1, Ki67, c-Myc, cyclin E, c-Jun, β-catenin, Cf-2, NF-κB, RAF1, c-Fos, RARα, AIB1/SRC-3, HBx, STAT3, p53, Bcl-2, p73, BimEL, p66Shc, CHE1, tau, amyloid precursor protein (APP), APP fragment, synphilin-1, gephyrin, MCL1, NFAT, AUF1, IRF3, BTK, SIN3-RPD3, or hSpt5.
14. The isolated antibody of claim 13 , wherein said Pin1 substrate is tau.
15. The isolated antibody of claim 13 , wherein said Pin1 substrate is APP.
16. The isolated antibody of claim 13 , wherein said Pin1 substrate is c-Jun.
17. The isolated antibody of claim 13 , wherein said Pin1 substrate is NF-κB.
18. The isolated antibody of claim 13 , wherein said Pin1 substrate is p53.
19. The isolated antibody of claim 11 , produced by a process which comprises the steps of:
(i) providing an antibody library;
(ii) contacting said antibody library with a polypeptide comprising a Xaa-Pro motif;
(iii) determining binding of an antibody from said antibody library to said Xaa-Pro motif of said polypeptide, wherein said antibody specifically binds to the trans conformation of said Xaa-Pro motif of said polypeptide; and
(iv) isolating said antibody, wherein said antibody is a conformation-specific antibody.
20. An isolated antibody composition of claim 11 to induce passive immunity against a disorder associated with a deregulation of PPlase activity.