CRY2 Protein

CRY2 Protein

Introduction

Cry2 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"> [@autophagy]
<table> [@circadian]
<tr><th colspan="2" style="background:#f0f0f0;">CRY2 — Cryptochrome Circadian Regulator 2 Protein</th></tr> [@cellular]
<tr><td><strong>Protein Name</strong></td><td>Cryptochrome Circadian Regulator 2</td></tr> [@protein]
<tr><td><strong>Gene</strong></td><td>[CRY2](/proteins/cry2-protein)</td></tr>
<tr><td><strong>UniProt ID</strong></td><td>Q96T44</td></tr>
<tr><td><strong>PDB Structure</strong></td><td>4MLP, 4WC8, 5G0N</td></tr>
<tr><td><strong>Molecular Weight</strong></td><td>66 kDa</td></tr>
<tr><td><strong>Subcellular Localization</strong></td><td>Nucleus, Cytoplasm</td></tr>
<tr><td><strong>Protein Family</strong></td><td>Cryptochrome family, DNA photolyase family</td></tr>
<tr>
<td class="label">Associated Diseases</td>
<td><a href="/wiki/als" style="color:#ef9a9a">Als</a>, <a href="/wiki/alzheimer" style="color:#ef9a9a">Alzheimer</a>, <a href="/wiki/cancer" style="color:#ef9a9a">Cancer</a>, <a href="/wiki/carcinoma" style="color:#ef9a9a">Carcinoma</a>, <a href="/wiki/depression" style="color:#ef9a9a">Depression</a></td>
</tr>
<tr>
<td class="label">KG Connections</td>
<td><a href="/atlas" style="color:#4fc3f7">86 edges</a></td>
</tr>
</table>
</div>

Overview

CRY2 Protein

Introduction

Cry2 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"> [@autophagy]
<table> [@circadian]
<tr><th colspan="2" style="background:#f0f0f0;">CRY2 — Cryptochrome Circadian Regulator 2 Protein</th></tr> [@cellular]
<tr><td><strong>Protein Name</strong></td><td>Cryptochrome Circadian Regulator 2</td></tr> [@protein]
<tr><td><strong>Gene</strong></td><td>[CRY2](/proteins/cry2-protein)</td></tr>
<tr><td><strong>UniProt ID</strong></td><td>Q96T44</td></tr>
<tr><td><strong>PDB Structure</strong></td><td>4MLP, 4WC8, 5G0N</td></tr>
<tr><td><strong>Molecular Weight</strong></td><td>66 kDa</td></tr>
<tr><td><strong>Subcellular Localization</strong></td><td>Nucleus, Cytoplasm</td></tr>
<tr><td><strong>Protein Family</strong></td><td>Cryptochrome family, DNA photolyase family</td></tr>
<tr>
<td class="label">Associated Diseases</td>
<td><a href="/wiki/als" style="color:#ef9a9a">Als</a>, <a href="/wiki/alzheimer" style="color:#ef9a9a">Alzheimer</a>, <a href="/wiki/cancer" style="color:#ef9a9a">Cancer</a>, <a href="/wiki/carcinoma" style="color:#ef9a9a">Carcinoma</a>, <a href="/wiki/depression" style="color:#ef9a9a">Depression</a></td>
</tr>
<tr>
<td class="label">KG Connections</td>
<td><a href="/atlas" style="color:#4fc3f7">86 edges</a></td>
</tr>
</table>
</div>

Overview

CRY2 (Cryptochrome 2) is a protein encoded by a gene located on chromosome 12p24.31. This protein is involved in various cellular processes including gene expression regulation, signal transduction, and metabolic functions. CRY2 plays important roles in neuronal function and is implicated in neurodegenerative diseases.

Structure

CRY2 is a flavin adenine dinucleotide (FAD)-binding protein that serves as a central component of the circadian clock.

Domain Architecture

Structural Features

• FAD cofactor: Essential for cryptochrome function
• Rossmann fold: Characteristic of FAD-binding proteins
• CCHC-type zinc finger: Present in some cryptochromes
• Protein interaction surfaces: For PER, BMAL1, FBXL3

Normal Function

Circadian Clock Role

CRY2 functions as the primary transcriptional repressor in the circadian feedback loop:

Molecular Functions

• FAD-dependent photochemistry: Light-activated conformational changes
• Transcriptional repression: Direct inhibition of CLOCK/BMAL1
• Protein degradation regulation: Controls PER protein stability

Role in Disease

Sleep Disorders

• Advanced Sleep Phase Disorder: CRY2 mutations cause familial ASPD
• Circadian rhythm disorders: CRY2 variants affect sleep timing

Neurodegeneration

Alzheimer's Disease

• CRY2 expression reduced in AD brain
• CRY2 deficiency accelerates amyloid pathology in models
• Circadian CRY2 disruption correlates with AD progression

Parkinson's Disease

• CRY2 rhythmicity altered in PD
• Contributes to sleep-wake disturbances
• May affect dopaminergic function

Psychiatric Disorders

• Bipolar disorder: CRY2 variants associated with rapid cycling
• Seasonal affective disorder: Light signaling through CRY2
• Depression: Circadian CRY2 dysfunction

Therapeutic Targeting

Drug Development

• CRY2 stabilizers: KKLI analogs that stabilize CRY2
• FBXL3 inhibitors: Prevent CRY2 degradation
• CRY agonists: Activate CRY2 signaling

Chronobiotics

• Light therapy: Can modulate CRY2 function
• Melatonin: Interacts with CRY2 pathways

Key Publications

See Also

• [CRY2 Gene](/proteins/cry2-protein)
• [CRY1 Protein](/proteins/cry1-protein)
• [PER2 Protein](/proteins/per2-protein)
• [BMAL1 Protein](/proteins/bmal1-protein)
• [Circadian Rhythm Pathway](/mechanisms/circadian-rhythm-disruption)

External Links

• [UniProt: CRY2 (Q96T44)](https://www.uniprot.org/uniprot/Q96T44)
• [PDB: CRY2 Structures](https://www.rcsb.org/structure/4MLP)
• [NCBI Protein: CRY2](https://www.ncbi.nlm.nih.gov/protein/Q96T44)

Background

The study of Cry2 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