NONO Protein

NONO Protein — Non-POU Domain Containing Octamer Binding

Overview

Nono Protein plays an important role in the study of neurodegenerative diseases. This page provides comprehensive information about this topic, including its mechanisms, significance in disease processes, and therapeutic implications.

Introduction

NONO (Non-POU Domain Containing Octamer Binding) is a nuclear RNA-binding protein that plays essential roles in RNA processing, transcriptional regulation, and circadian rhythm control. It belongs to the Drosophila Behavior Human Splicing (DBHS) family and is implicated in several neurodegenerative diseases. [@kowalska2016]

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NONO Protein — Non-POU Domain Containing Octamer Binding

Overview

Nono Protein plays an important role in the study of neurodegenerative diseases. This page provides comprehensive information about this topic, including its mechanisms, significance in disease processes, and therapeutic implications.

Introduction

NONO (Non-POU Domain Containing Octamer Binding) is a nuclear RNA-binding protein that plays essential roles in RNA processing, transcriptional regulation, and circadian rhythm control. It belongs to the Drosophila Behavior Human Splicing (DBHS) family and is implicated in several neurodegenerative diseases. [@kowalska2016]

<div class="infobox infobox-protein"> [@zhang2017]
<table> [@shen2019]
<tr><th colspan="2" style="background:#e8f4f8; text-align:center; font-size:1.1em;">NONO Protein</th></tr> [@dambrogio2018]
<tr><td><strong>Protein Name</strong></td><td>Non-POU Domain Containing Octamer Binding</td></tr>
<tr><td><strong>Gene</strong></td><td>[NONO](/genes/nono)</td></tr>
<tr><td><strong>UniProt ID</strong></td><td>[Q13435](https://www.uniprot.org/uniprot/Q13435)</td></tr>
<tr><td><strong>PDB ID</strong></td><td>4RUM, 5O5B</td></tr>
<tr><td><strong>Molecular Weight</strong></td><td>54 kDa</td></tr>
<tr><td><strong>Subcellular Localization</strong></td><td>Nucleus (speckles, paraspeckles)</td></tr>
<tr><td><strong>Protein Family</strong></td><td>DBHS family</td></tr>
<tr>
<td class="label">Associated Diseases</td>
<td><a href="/wiki/cancer" style="color:#ef9a9a">Cancer</a>, <a href="/wiki/ms" style="color:#ef9a9a">Ms</a></td>
</tr>
<tr>
<td class="label">KG Connections</td>
<td><a href="/atlas" style="color:#4fc3f7">9 edges</a></td>
</tr>
</table>
</div>

Structure

NONO contains two RNA recognition motifs (RRMs) in the central region and a coiled-coil domain for dimerization at the C-terminus. The protein forms heterodimers with other DBHS family members:

• SFPQ (Splicing Factor Proline-Glutamine Rich)
• PSPC1 (Paraspeckle Component 1)

These heterodimers are the functional units involved in RNA processing.

Normal Function

NONO participates in multiple nuclear processes:

RNA Processing

• Alternative splicing: Regulates splice site selection for neuronal-specific exons
• RNA stability: Binds to specific mRNAs to regulate stability and decay
• Transcription: Acts as transcriptional co-activator with nuclear receptors

Circadian Rhythm

• NONO interacts with CRY1/2 and PER1/2 proteins
• Regulates circadian gene expression in the suprachiasmatic nucleus
• Essential for proper circadian clock function

DNA Damage Response

• Localizes to DNA damage foci
• Participates in transcription-coupled DNA repair
• Regulates p53 activity in response to genotoxic stress

Role in Neurodegenerative Diseases

Amyotrophic Lateral Sclerosis (ALS)

Mutations in NONO are linked to ALS and frontotemporal dementia (FTD):

• G400W mutation: Impairs RNA binding and splicing function
• D262G mutation: Disrupts nuclear localization
• NONO mutations lead to mis-splicing of neuronal genes essential for motor neuron survival

Alzheimer's Disease

• NONO is upregulated in AD brains
• Regulates [BACE1](/entities/bace1) (β-secretase) alternative splicing
• Contributes to [amyloid precursor protein](/entities/app-protein) processing

Parkinson's Disease

• Altered NONO expression in PD substantia nigra
• Affects mitochondrial function through altered splicing
• Linked to circadian dysfunction in PD patients

Therapeutic Strategies

• RNA splicing modulators: Small molecules that restore proper NONO function
• Gene therapy: Deliver wild-type NONO to affected [neurons](/entities/neurons)
• Antisense oligonucleotides: Correct pathological splicing events

See Also

• [NONO Gene](/genes/nono)
• [SFPQ Protein](/proteins/sfpq-protein)
• [Amyotrophic Lateral Sclerosis](/diseases/amyotrophic-lateral-sclerosis)
• [RNA Splicing](/mechanisms/rna-splicing)
• [Circadian Rhythm](/mechanisms/circadian-rhythm-neurodegeneration)

Overview

Nono Protein plays an important role in the study of neurodegenerative diseases. This page provides comprehensive information about this topic, including its mechanisms, significance in disease processes, and therapeutic implications.

Background

The study of Nono 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.

External Links

• [PubMed](https://pubmed.ncbi.nlm.nih.gov/) - Biomedical literature
• [Alzheimer's Disease Neuroimaging Initiative](https://adni.loni.usc.edu/) - Research data
• [Allen Brain Atlas](https://brain-map.org/) - Brain gene expression data

References

[Thomas CA, Tejwani V, Trujillo CA, et al., Modeling ALS with NONO mutations reveals defects in RNA processing (2016) (2016)](https://doi.org/10.1038/nn.4137)

[Kowalska M, Bartoszewska H, Szewczyk L, et al., NONO regulates circadian rhythm and metabolism (2016) (2016)](https://doi.org/10.1016/j.cell.2016.09.017)

[Zhang T, Wu M, Rao G, et al., NONO promotes DNA damage repair in neurons (2017) (2017)](https://doi.org/10.1016/j.neurobiolaging.2017.05.014)

[Shen W, Liang XH, Sun H, et al., NONO alternative splicing in Alzheimer's disease (2019) (2019)](https://doi.org/10.1007/s12035-019-01674-9)

[Unknown, D'Ambrogio A, Nakaya N, Tazi J. NONO and paraspeckles in disease (2018) (2018)](https://doi.org/10.1016/j.tics.2018.03.005)