Neuronal 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.
| NOS1 |
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| Neuronal Nitric Oxide Synthase |
| Protein Name | Neuronal Nitric Oxide Synthase |
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| Gene | NOS1 |
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| UniProt ID | P70680 |
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| PDB ID | 1OM4 |
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| Molecular Weight | 160 kDa |
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| Subcellular Localization | Cytoplasm, Synaptic vesicles |
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| Protein Family | Nitric oxide synthase family |
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NOS1 (Neuronal Nitric Oxide Synthase) is a protein encoded by the NOS1 gene. It is an enzyme that catalyzes the production of nitric oxide (NO) from L-arginine. In the brain, NOS1 is primarily expressed in neurons and produces NO as a signaling molecule.
NOS1 is a 1153-amino acid protein with:
- Oxygenase domain (N-terminal) - binds heme, BH4, arginine
- Reductase domain (C-terminal) - binds FAD, FMN, NADPH
- PDZ domain for synaptic targeting
- Calcium/calmodulin binding site
NOS1 produces nitric oxide in neurons:
- Acts as a neurotransmitter and neuromodulator
- Regulates synaptic plasticity and memory
- Controls cerebral blood flow
- Mediates responses to NMDA receptor activation
- Increased NOS1 expression in substantia nigra
- NO contributes to dopaminergic neuron toxicity
- May promote alpha-synuclein aggregation
- Dysregulated NO signaling in AD brains
- Interactions with amyloid-beta and tau
- Contributes to synaptic dysfunction
- Dual role: protective early, damaging late
- Target for neuroprotective strategies
- NOS1 inhibitors under investigation
- Selective serotonin reuptake inhibitors downregulate NOS1
- NMDA receptor modulators affect NO production
- Hurtado et al. (2009). "NOS1 polymorphisms and Parkinson's disease." Neurosci Lett. PMID: 19166815
The study of Neuronal 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.
- Hurtado et al. (2009). "NOS1 polymorphisms and Parkinson's disease." Neurosci Lett. PMID: 19166815
- Liu et al. (2003). "Nitric oxide and neurodegenerative diseases." J Neural Transm. PMID: 14636354
- Dawson et al. (1991). "Nitric oxide synthase and neuronal NADPH-diaphorase." Proc Natl Acad Sci USA. PMID: 1712104
- Bredt et al. (1991). "Nitric oxide synthase: a cloned enzyme." Trends Pharmacol Sci. PMID: 1656245