Endothelial Nitric Oxide Synthase is an important component in the neurobiology of neurodegenerative diseases. This page provides detailed information about its structure, function, and role in disease processes.
| NOS3 |
|---|
| Endothelial Nitric Oxide Synthase |
| Protein Name | Endothelial Nitric Oxide Synthase |
|---|
| Gene | NOS3 |
|---|
| UniProt ID | Q9UHD5 |
|---|
| PDB ID | 1M9J |
|---|
| Molecular Weight | 133 kDa |
|---|
| Subcellular Localization | Plasma membrane, Cytoplasm, Golgi |
|---|
| Protein Family | Nitric oxide synthase family |
|---|
NOS3 (Endothelial Nitric Oxide Synthase) is a protein encoded by the NOS3 gene. It is primarily expressed in vascular endothelial cells where it produces nitric oxide (NO) that regulates blood flow, blood pressure, and vascular homeostasis.
NOS3 is a 1157-amino acid protein with:
- N-terminal oxygenase domain with heme and BH4 binding
- C-terminal reductase domain with FAD, FMN, NADPH
- Myristoylation site for membrane localization
- Calcium/calmodulin binding domain
NOS3 produces nitric oxide in endothelial cells:
- Regulates vascular tone and blood pressure
- Controls cerebral blood flow
- Inhibits platelet adhesion
- Protects against atherosclerosis
- Maintains blood-brain barrier
- Reduced cerebral blood flow in AD
- Endothelial dysfunction contributes to pathology
- Blood-brain barrier breakdown
- NO deficiency in early disease
- Endothelial NO essential for cognition
- Reduced NO affects learning and memory
- Vascular contributions to cognitive impairment
- Protective in acute ischemic stroke
- NO maintains cerebral perfusion
- Endothelial dysfunction increases risk
- Statins enhance NOS3 activity
- ACE inhibitors improve endothelial function
- L-arginine supplementation explored
- Kim et al. (2008). "Endothelial nitric oxide synthase and Alzheimer's disease." J Neurol Sci. PMID: 18572167
The study of Endothelial Nitric Oxide Synthase 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.
- Kim et al. (2008). "Endothelial nitric oxide synthase and Alzheimer's disease." J Neurol Sci. PMID: 18572167
- Katusic et al. (2009). "Endothelial nitric oxide synthase in vascular disease." Ann Rev Med. PMID: 18729729
- van Gool et al. (2006). "eNOS and Alzheimer's disease." Neurobiol Aging. PMID: 16504407
- Edwards et al. (2010). "Vascular dysfunction in Alzheimer's disease." Acta Neuropathol. PMID: 20165947