NPAS2 Protein

NPAS2 Protein

Introduction

Npas2 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.

<div class="infobox infox-protein"> [@purinergic]
<table> [@lipid]
<tr><th colspan="2" style="background:#f0f0f0;">NPAS2 — Neuronal PAS Domain Protein 2</th></tr> [@sleep]
<tr><td><strong>Protein Name</strong></td><td>Neuronal PAS Domain Protein 2</td></tr> [@neurodegeneration]
<tr><td><strong>Gene</strong></td><td>[NPAS2](/proteins/npas2-protein)</td></tr>
<tr><td><strong>UniProt ID</strong></td><td>Q8BZD0</td></tr>
<tr><td><strong>PDB Structure</strong></td><td>5SY4, 5O9T</td></tr>
<tr><td><strong>Molecular Weight</strong></td><td>87 kDa</td></tr>
<tr><td><strong>Subcellular Localization</strong></td><td>Nucleus</td></tr>
<tr><td><strong>Protein Family</strong></td><td>bHLH-PAS transcription factor family</td></tr>
<tr>
<td class="label">KG Connections</td>
<td><a href="/atlas" style="color:#4fc3f7">14 edges</a></td>
</tr>
</table>
</div>

Overview

NPAS2 (Neuronal PAS Domain Protein 2) is a protein encoded by a gene located on chromosome 2q11.2. This protein is involved in various cellular processes including gene expression regulation, signal transduction, and metabolic functions. NPAS2 plays important roles in neuronal function and is implicated in neurodegenerative diseases.

Structure

NPAS2 Protein

Introduction

Npas2 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.

<div class="infobox infox-protein"> [@purinergic]
<table> [@lipid]
<tr><th colspan="2" style="background:#f0f0f0;">NPAS2 — Neuronal PAS Domain Protein 2</th></tr> [@sleep]
<tr><td><strong>Protein Name</strong></td><td>Neuronal PAS Domain Protein 2</td></tr> [@neurodegeneration]
<tr><td><strong>Gene</strong></td><td>[NPAS2](/proteins/npas2-protein)</td></tr>
<tr><td><strong>UniProt ID</strong></td><td>Q8BZD0</td></tr>
<tr><td><strong>PDB Structure</strong></td><td>5SY4, 5O9T</td></tr>
<tr><td><strong>Molecular Weight</strong></td><td>87 kDa</td></tr>
<tr><td><strong>Subcellular Localization</strong></td><td>Nucleus</td></tr>
<tr><td><strong>Protein Family</strong></td><td>bHLH-PAS transcription factor family</td></tr>
<tr>
<td class="label">KG Connections</td>
<td><a href="/atlas" style="color:#4fc3f7">14 edges</a></td>
</tr>
</table>
</div>

Overview

NPAS2 (Neuronal PAS Domain Protein 2) is a protein encoded by a gene located on chromosome 2q11.2. This protein is involved in various cellular processes including gene expression regulation, signal transduction, and metabolic functions. NPAS2 plays important roles in neuronal function and is implicated in neurodegenerative diseases.

Structure

NPAS2 is a basic helix-loop-helix (bHLH)-PAS transcription factor that functions as the circadian clock transcriptional activator.

Domain Architecture

Structural Features

• Basic region: Contacts E-box DNA sequences
• Helix-loop-helix: Dimerization interface
• PAS domains: Sensory domains for environmental signals
• Heme binding: Enables redox sensing

Normal Function

Circadian Clock Role

NPAS2 serves as a transcriptional activator in the circadian clock:

Physiological Functions

• Circadian rhythm generation: Central clock in SCN
• Metabolic regulation: Controls rhythmic metabolism
• Sleep-wake cycles: Regulates arousal and sleep
• Cognitive function: and memory

Role in Disease

Neurodegeneration Influences learning

Alzheimer's Disease

• NPAS2 expression altered in AD brain
• NPAS2-BMAL1 rhythm disrupted in AD
• Sleep fragmentation in AD involves NPAS2 dysfunction
• May influence amyloid pathology

Parkinson's Disease

• NPAS2 deficiency exacerbates dopaminergic neuron loss
• Circadian NPAS2 dysregulation in PD
• Sleep-wake disturbances involve NPAS2

Sleep Disorders

• Advanced Sleep Phase Disorder: NPAS2 mutations cause FASP
• Shift work disorder: NPAS2 affects adaptation
• Sleep deprivation: Alters NPAS2 expression

Psychiatric Disorders

• Depression: NPAS2 variants in seasonal patterns
• Bipolar disorder: Circadian NPAS2 dysfunction
• Anxiety: NPAS2 in amygdala regulates behavior

Therapeutic Targeting

Drug Development

• NPAS2-BMAL1 modulators: Small molecules targeting the dimer
• ROR agonists/antagonists: Indirect NPAS2 modulation
• Redox modulators: Target NPAS2 heme-binding

Chronobiotics

• Light therapy: Can entrain NPAS2 rhythms
• Melatonin: Modulates NPAS2 function

Key Publications

See Also

• [NPAS2 Gene](/proteins/npas2-protein)
• [BMAL1 Protein](/proteins/bmal1-protein)
• [CLOCK Protein](/proteins/clock-protein)
• [PER2 Protein](/proteins/per2-protein)
• [Circadian Rhythm Pathway](/mechanisms/circadian-rhythm-disruption)

External Links

• [UniProt: NPAS2 (Q8BZD0)](https://www.uniprot.org/uniprot/Q8BZD0)
• [PDB: NPAS2 Structures](https://www.rcsb.org/structure/5SY4)
• [NCBI Protein: NPAS2](https://www.ncbi.nlm.nih.gov/protein/Q8BZD0)

Background

The study of Npas2 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.

References