Pecam1 Protein is an important component in the neurobiology of neurodegenerative diseases. This page provides detailed information about its structure, function, and role in disease processes.
Platelet Endothelial Cell Adhesion Molecule 1 (PECAM1) is a 738-amino acid type I transmembrane glycoprotein expressed predominantly on endothelial cells, platelets, and leukocytes[1]. It plays essential roles in vascular inflammation, leukocyte transmigration, and maintaining endothelial barrier function. PECAM1 is particularly concentrated at endothelial cell junctions where it contributes to the formation and maintenance of the endothelial barrier[2].
| Attribute | Value |
|---|---|
| Protein Name | Platelet Endothelial Cell Adhesion Molecule 1 |
| Gene Symbol | PECAM1 |
| Protein Length | 738 amino acids |
| Molecular Weight | ~72 kDa (unglycosylated); 80-90 kDa (glycosylated) |
| UniProt ID | P16284 |
| PDB Structures | 1FNS, 1HTH, 2KBC, 4CYT |
| Cellular Location | Plasma membrane (type I transmembrane); cell junctions |
| Protein Family | Immunoglobulin superfamily (IgSF) |
PECAM1 contains distinct structural domains[3]:
PECAM1 mediates homophilic (PECAM1-PECAM1) adhesion[2:1][6]:
PECAM1 also binds to other molecules[9]:
| Partner | Interaction Type | Function |
|---|---|---|
| Integrin αvβ3 | Heterophilic | Angiogenesis, cell survival |
| Integrin α6β1 | Heterophilic | Cell-matrix adhesion |
| CD38 | Heterophilic | Leukocyte activation |
| Glycosaminoglycans | Heterophilic | Heparan sulfate binding |
The cytoplasmic ITIM motifs recruit phosphatases[5:1]:
The cytoplasmic tail contains tyrosine and serine/threonine residues[10]:
PECAM1 is N-glycosylated[11]:
Key structural studies reveal[4:1][13]:
PECAM1 plays complex roles in AD pathophysiology[15][16]:
In PD, PECAM1 contributes to neuroinflammation[22][23]:
PECAM1 is critically involved in stroke pathophysiology[28][29]:
PECAM1 participates in MS pathogenesis[34][35]:
PECAM1 contributes to vascular cognitive impairment[40][41]:
| Strategy | Approach | Development Status | Notes |
|---|---|---|---|
| Blocking Antibodies | Anti-PECAM1 antibodies | Research | Prevents leukocyte transmigration[47] |
| Peptide Inhibitors | ITIM mimetics | Preclinical | Blocks inhibitory signaling[48] |
| Soluble PECAM1 | Recombinant sPECAM1 | Research | Decoy for transmigration |
| Gene Therapy | siRNA/shRNA | Preclinical | Reduces PECAM1 expression |
| Kinase Inhibitors | Src family inhibitors | Preclinical | Block PECAM1 phosphorylation |
The study of Pecam1 Protein 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.
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