SHANK2 Gene — SH3 and Multiple Ankyrin Repeat Domains 2

SHANK2 Gene — SH3 and Multiple Ankyrin Repeat Domains 2

<table class="infobox infobox-protein">
<tr>
<th class="infobox-header" colspan="2">SHANK2 Gene — SH3 and Multiple Ankyrin Repeat Domains 2</th>
</tr>
<tr>
<td class="label">Symbol</td>
<td><strong>SHANK2</strong></td>
</tr>
<tr>
<td class="label">Full Name</td>
<td>SHANK2 Gene — SH3 and Multiple Ankyrin Repeat Domains 2</td>
</tr>
<tr>
<td class="label">Type</td>
<td>Protein</td>
</tr>
<tr>
<td class="label">UniProt</td>
<td><a href="https://www.uniprot.org/uniprot/?query=SHANK2" target="_blank">Search UniProt</a></td>
</tr>
<tr>
<td class="label">KG Connections</td>
<td><a href="/atlas" style="color:#4fc3f7">1 edges</a></td>
</tr>
</table>

Introduction

Shank2 Gene — Sh3 And Multiple Ankyrin Repeat Domains 2 is an important component in the neurobiology of neurodegenerative diseases. This page provides detailed information about its structure, function, and role in disease processes.

SHANK2 encodes a scaffold protein critical for synaptic structure and function. The SHANK2 protein (also known as ProSAP1) is a major component of the postsynaptic density and plays essential roles in synapse formation, maintenance, and plasticity. [@sheng2012]

Overview

...

SHANK2 Gene — SH3 and Multiple Ankyrin Repeat Domains 2

<table class="infobox infobox-protein">
<tr>
<th class="infobox-header" colspan="2">SHANK2 Gene — SH3 and Multiple Ankyrin Repeat Domains 2</th>
</tr>
<tr>
<td class="label">Symbol</td>
<td><strong>SHANK2</strong></td>
</tr>
<tr>
<td class="label">Full Name</td>
<td>SHANK2 Gene — SH3 and Multiple Ankyrin Repeat Domains 2</td>
</tr>
<tr>
<td class="label">Type</td>
<td>Protein</td>
</tr>
<tr>
<td class="label">UniProt</td>
<td><a href="https://www.uniprot.org/uniprot/?query=SHANK2" target="_blank">Search UniProt</a></td>
</tr>
<tr>
<td class="label">KG Connections</td>
<td><a href="/atlas" style="color:#4fc3f7">1 edges</a></td>
</tr>
</table>

Introduction

Shank2 Gene — Sh3 And Multiple Ankyrin Repeat Domains 2 is an important component in the neurobiology of neurodegenerative diseases. This page provides detailed information about its structure, function, and role in disease processes.

SHANK2 encodes a scaffold protein critical for synaptic structure and function. The SHANK2 protein (also known as ProSAP1) is a major component of the postsynaptic density and plays essential roles in synapse formation, maintenance, and plasticity. [@sheng2012]

Overview

SHANK2 is a large multidomain scaffold protein that connects neurotransmitter receptors, ion channels, and signaling molecules to the actin cytoskeleton. It is essential for proper synaptic function and has been implicated in neurodevelopmental and neurodegenerative disorders. [@wang2021]

Gene Structure and Expression

The SHANK2 gene is located on chromosome 11q13.3 and contains 22 exons, producing multiple isoforms through alternative splicing. [@gu2023]

Expression Pattern: [@jiang2024]

• Expressed throughout the brain
• High expression in [cortex](/brain-regions/cortex) and [hippocampus](/brain-regions/hippocampus)
• Detected in excitatory and inhibitory [neurons](/entities/neurons)
• Primarily postsynaptic

Molecular Function

Protein Structure

• Ankyrin repeat domains (ANK)
• SH3 domain
• Proline-rich region
• PDZ domain

Synaptic Scaffold Function

• Organizes postsynaptic density
• Links receptors to cytoskeleton
• Coordinates signaling complexes
• Regulates spine morphology

Signaling Roles

• Activates MAPK/ERK pathway
• Regulates [mTOR](/entities/mtor) signaling
• Controls synaptic plasticity

Disease Associations

Alzheimer's Disease

• SHANK2 expression altered in AD brains
• Contributes to synaptic dysfunction
• May affect amyloid-induced synapse loss
• Potential therapeutic target

Autism Spectrum Disorders

• SHANK2 mutations cause ASD
• Haploinsufficiency leads to social deficits
• Mouse models show synaptic abnormalities

Schizophrenia

• SHANK2 variants associated with risk
• Altered synaptic function
• Possible effect on cognition

Other Conditions

• Intellectual disability
• Developmental delay

Therapeutic Implications

Target Development

• Small molecules enhancing SHANK2 function
• Gene therapy for mutations
• Synapse-protective strategies

Research Directions

• Understanding SHANK2 in AD
• Developing targeted therapies

Signaling Pathways

SHANK2 interacts with numerous signaling pathways:

• mGluR1/5 signaling: Regulates synaptic plasticity via mGluR activation
• [NMDA](/entities/nmda-receptor) receptor signaling: Modulates NMDA receptor function through PSD-95 interactions
• AMPAR trafficking: Controls AMPA receptor insertion and removal from synapses
• Rho GTPase signaling: Activates RhoA/ROCK pathway affecting dendritic spine morphology
• MAPK/ERK pathway: Involved in synaptic plasticity and learning

Post-Translational Modifications

• Phosphorylation: Multiple serine/threonine phosphorylation sites regulate protein interactions
• SUMOylation: Modulates synaptic targeting and stability
• Acetylation: Affects protein-protein interactions
• Ubiquitination: Targets SHANK2 for degradation under certain conditions

Animal Models

• Shank2 knockout mice: Show reduced synaptic plasticity, impaired learning
• SHANK2 mutations in mice: Recapitulate ASD-like behaviors
• Viral-mediated shRNA knockdown: Transiently reduces synaptic strength

Therapeutic Implications

Targeted Approaches

• SHANK2 stabilizers: Small molecules promoting SHANK2 synaptic retention
• mGluR modulators: Positive allosteric modulators to enhance downstream signaling
• BDNF mimetics: Promote SHANK2-actin coupling
• Gene therapy: AAV-mediated SHANK2 expression approaches

Research Challenges

• Delivery across [blood-brain barrier](/entities/blood-brain-barrier)
• Temporal specificity of intervention
• Balancing excitatory/inhibitory transmission

Background

The study of Shank2 Gene — Sh3 And Multiple Ankyrin Repeat Domains 2 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.

See Also

• [SHANK2 Protein](/proteins/shank2-protein)
• SHANK3 Gene
• Synaptic Scaffolding
• [Alzheimer's Disease](/diseases/alzheimers-disease)
• [Autism Spectrum Disorders](/diseases/autism-spectrum-disorders)
• [Synaptic Dysfunction](/mechanisms/synaptic-dysfunction)
• [PSD-95](/entities/psd-95)