Inhibitors of TLR signaling by targeting TIR domain interfaces
TIR-domain decoy peptides and TIR domain peptides are disclosed, as well as methods of using the peptides in the regulation of toll-like receptor (TLR) activation and signaling.
1. A method of inhibiting TIR:TIR interaction between two TIR (Toll/IL-1 receptor) domain-bearing proteins, comprising contacting a cell expressing TIR domain-bearing proteins with one or more TIR-derived decoy peptides, wherein the TIR-derived decoy peptides are selected from the group consisting of: TRAP (Toll/interleukin-1 receptor domain-containing adapter protein) based, TIR-derived decoy peptides
TR3 (RQIKIWFQNRRMKWKKEGSQASLRCF; SEQ ID NO:1),
TR5 (RQIKIWFQNRRMKWKKELCQALSRSHCR; SEQ ID NO:2),
TR6 (RQIKIWFQNRRMKWKKPGFLRDPWCKYQML; SEQ ID NO:3),
TR9 (RQIKIWFQNRRMKWKKAAYPPELRFMYYVD; SEQ ID NO:4),
TR11 (RQIKIWFQNRRMKWKKGGFYQVKEAVIHY; SEQ ID NO:5),
TRAM (TIR domain-containing adapter-inducing interferon-β-(TRIF-) related adapter molecule) based, TIR-derived decoy peptides
TM4-ΔC(RQIKIWFQNRRMKWKKIVFAEMPCG; SEQ ID NO:7),
TM6 (RQIKIWFQNRRMKWKKENFLRDTWCNFQFY; SEQ ID NO:8),
TRIF (TIR domain-containing adapter-inducing interferon-β) based, TIR-derived decoy peptides
TF5 (RQIKIWFQNRRMKWKKCLQDAIDHSGFT; SEQ ID NO:10),
TF5-ΔC(RQIKIWFQNRRMKWKKCLQDAIDHS; SEQ ID NO:11), MyD88 based, TIR-derived decoy peptides
M3 (RQIKIWFQNRRMKWKKEQTDYRLKLC; SEQ ID NO:12),
M5 (RQIKIWFQNRRMKWKKIASELIEKRCRRM; SEQ ID NO:14),
TLR2 (Toll-like receptor 2) based, TIR-derived decoy peptides
2R1 (RQIKIWFQNRRMKWKKRKPKKAPCRDVCYD; SEQ ID NO:20),
2R3 (RQIKIWFQNRRMKWKKENSDPPFKLC; SEQ ID NO:21),
2R9 (RQIKIWFQNRRMKWKKPQRFCKLRKIMNT; SEQ ID NO:22), and
2DD-αD (RQIKIWFQNRRMKWKKEPIERKAIPQRFCK; SEQ ID NO:24).
2. The method of claim 1 , wherein the TIR domain-bearing proteins are TLRs, or TLR adapter proteins, or both.
3. The method of claim 2 , wherein the TLRs are one or more receptors selected from the group consisting of TLR1, TLR2, TLR3, TLR4, TLR5, TLR6, TLR7, TLR8, TLR9, TLR10, TLR11, TLR12, and TLR13.
4. The method of claim 2 , wherein the TLR adapter proteins are one or more proteins selected from the group consisting of TIRAP, MyD88, TRIF, and TRAM.
5. The method of claim 1 , wherein the one or more TIR-derived decoy peptides are one or more TRAP based, TIR-derived decoy peptides.
6. The method of claim 1 , wherein the one or more TIR-derived decoy peptides are one or more TRAM based, TIR-derived decoy peptides.
7. The method of claim 1 , wherein the one or more TIR-derived decoy peptides are one or more TRIF based, TIR-derived decoy peptides.
8. The method of claim 1 , wherein the one or more TIR-derived decoy peptides are one or more MyD88 based, TIR-derived decoy peptides.
9. The method of claim 1 , wherein the one or more TIR-derived decoy peptides are one or more TLR2 based, TIR-derived decoy peptides.