Tlr2 Protein — Toll Like Receptor 2 is an important component in the neurobiology of neurodegenerative diseases. This page provides detailed information about its structure, function, and role in disease processes.
TLR2 (Toll-Like Receptor 2) is a pattern recognition receptor that recognizes a broad range of microbial components from Gram-positive bacteria, fungi, and parasites. TLR2 functions primarily as a heterodimer with TLR1 or TLR6, expanding its ligand recognition capacity. It plays critical roles in innate immunity and has been implicated in neuroinflammation and neurodegenerative diseases[1].
The TLR2 protein contains:
| Domain | Residues | Function |
|---|---|---|
| LRR-NT | 1-100 | N-terminal LRR |
| LRR | 100-600 | Ligand recognition |
| transmembrane | 620-650 | Membrane anchor |
| TIR | 660-784 | Signaling |
TLR2 functions as[2]:
TLR2 recognizes:
TLR2 activates:
| Dimer | Ligands | Response |
|---|---|---|
| TLR2/TLR1 | Triacylated lipopeptides | Pro-inflammatory |
| TLR2/TLR6 | Diacylated lipopeptides | Pro-inflammatory |
In AD[3]:
In PD:
In MS:
| Cell Type | Expression | Function |
|---|---|---|
| Macrophages | High | Pathogen recognition |
| Dendritic cells | High | Antigen presentation |
| Microglia | Moderate | CNS immunity |
| Epithelial cells | Variable | Barrier defense |
| Strategy | Approach | Status | Notes |
|---|---|---|---|
| TLR2 Agonists | Vaccine adjuvants | Approved | Used in vaccines |
| TLR2 Antagonists | Anti-inflammatory | Research | For sepsis, neuroinflammation |
Tlr2 knockout mice show:
The study of Tlr2 Protein — Toll Like Receptor 2 has evolved significantly over the past decades. Research in this area has revealed important insights into the underlying mechanisms of neurodegeneration and continues to drive therapeutic development.
Historical context and key discoveries in this field have shaped our current understanding and will continue to guide future research directions.
Oliveira-Nascimento L, et al. The role of TLR2 in health and disease. Int J Mol Sci. 2022. ↩︎
Kawai T, et al. TLR signaling. Semin Immunol. 2021. ↩︎
Zhou Y, et al. TLR2 in Alzheimer's disease. J Neuroinflammation. 2022. ↩︎