UBE2K Gene

UBE2K Gene

Introduction

Ube2K Gene 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 infobox-gene">
<table>
<tr><th colspan="2" style="background:#4a90d9; color:white;">UBE2K - Ubiquitin Conjugating Enzyme E2 K</th></tr>
<tr><td><strong>Full Name</strong></td><td>Ubiquitin Conjugating Enzyme E2 K</td></tr>
<tr><td><strong>Chromosomal Location</strong></td><td>1p34.3</td></tr>
<tr><td><strong>NCBI Gene ID</strong></td><td>[3093](https://www.ncbi.nlm.nih.gov/gene/3093)</td></tr>
<tr><td><strong>Ensembl ID</strong></td><td>ENSG00000109381</td></tr>
<tr><td><strong>UniProt ID</strong></td><td>[P61006](https://www.uniprot.org/uniprot/P61006)</td></tr>
<tr><td><strong>Associated Diseases</strong></td><td>Alzheimer's Disease, Huntington's Disease</td></tr>
</table>
</div>

Overview

...

UBE2K Gene

Introduction

Ube2K Gene 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 infobox-gene">
<table>
<tr><th colspan="2" style="background:#4a90d9; color:white;">UBE2K - Ubiquitin Conjugating Enzyme E2 K</th></tr>
<tr><td><strong>Full Name</strong></td><td>Ubiquitin Conjugating Enzyme E2 K</td></tr>
<tr><td><strong>Chromosomal Location</strong></td><td>1p34.3</td></tr>
<tr><td><strong>NCBI Gene ID</strong></td><td>[3093](https://www.ncbi.nlm.nih.gov/gene/3093)</td></tr>
<tr><td><strong>Ensembl ID</strong></td><td>ENSG00000109381</td></tr>
<tr><td><strong>UniProt ID</strong></td><td>[P61006](https://www.uniprot.org/uniprot/P61006)</td></tr>
<tr><td><strong>Associated Diseases</strong></td><td>Alzheimer's Disease, Huntington's Disease</td></tr>
</table>
</div>

Overview

The UBE2K gene encodes Ubiquitin-Conjugating Enzyme E2 K (Ubc13/UEV1), an E2 ubiquitin-conjugating enzyme involved in ubiquitin chain synthesis. UBE2K plays roles in protein degradation, DNA repair, and signal transduction["@wu2006"].

Function

UBE2K functions as:

• Ubiquitination: Catalyzes ubiquitin chain formation
• K63-linked chains: Generates K63-linked polyubiquitin
• DNA repair: Involved in DNA damage response
• [NF-κB](/entities/nf-kb) signaling: Regulates inflammatory responses
• Protein quality control: Degradation pathways[@hofmann2001]

Structure

UBE2K contains:

• Catalytic UBC domain
• UEV1 motif (E2 variant)
• Active site cysteine

Expression Pattern

UBE2K is:

• Widely expressed
• High in brain
• Localizes to cytoplasm and nucleus

Disease Associations

Alzheimer's Disease

• [Ubiquitin-proteasome system](/cell-types/ubiquitin-proteasome-system)
• Protein aggregate clearance
• [Tau](/proteins/tau) ubiquitination

Huntington's Disease

• Mutant [huntingtin](/proteins/huntingtin-protein) ubiquitination
• Protein quality control
• Aggregate clearance

Key Publications

Wu PY, et al. Ubc13 in signaling and disease. Cell Mol Life Sci. 2006;63(23):2667-2675. PMID: 17063477(https://pubmed.ncbi.nlm.nih.gov/17063477/)

See Also

• [UBE2K Protein](/proteins/ube2k-protein)
• [Ubiquitin-Proteasome System](/cell-types/ubiquitin-proteasome-system)

External Links

• [NCBI Gene: UBE2K](https://www.ncbi.nlm.nih.gov/gene/3093)
• [UniProt: P61006](https://www.uniprot.org/uniprot/P61006)

Background

The study of Ube2K Gene 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.

Molecular Mechanisms

UBE2K (Ubiquitin-Conjugating Enzyme E2 K), also known as Ubc13 or UEV1, is a member of the E2 ubiquitin-conjugating enzyme family that plays a critical role in the ubiquitin-proteasome system (UPS). Unlike typical E2 enzymes that catalyze ubiquitin transfer to target proteins, UBE2K specializes in generating specific polyubiquitin chains linked through lysine 63 (K63) of ubiquitin. This K63-linked ubiquitination does not typically target proteins for proteasomal degradation but instead serves as a signaling mechanism for various cellular processes.

The enzymatic mechanism involves UBE2K working in conjunction with E3 ubiquitin ligases to catalyze the formation of K63-linked polyubiquitin chains. These chains serve as signaling platforms for DNA damage response, NF-κB activation, protein quality control, and autophagy. The UEV1 variant of UBE2K lacks the catalytic cysteine but can still interact with ubiquitin and serve as an enhancer of Ubc13-mediated chain elongation.

In the context of neurodegeneration, UBE2K's role in protein quality control is particularly significant. The accumulation of misfolded proteins and toxic aggregates is a hallmark of Alzheimer's disease (tau tangles, amyloid-beta plaques), Parkinson's disease (Lewy bodies containing α-synuclein), and Huntington's disease (mutant huntingtin aggregates). Proper ubiquitination by enzymes like UBE2K is essential for clearing these aggregates through both proteasomal degradation and autophagy pathways.

Therapeutic Implications

Targeting UBE2K and K63-linked ubiquitination represents a potential therapeutic strategy for neurodegenerative diseases. Several approaches are being explored:

UPS Enhancement: Small molecules that enhance E2/E3 enzymatic activity could improve aggregate clearance

Autophagy Modulation: K63-linked ubiquitination is involved in selective autophagy receptor function

NF-κB Modulation: Since UBE2K regulates NF-κB signaling, modulating this pathway could affect neuroinflammation

DNA Repair Support: Enhancing DNA damage repair may protect neurons from genotoxic stress

Preclinical studies have shown that enhancing ubiquitination machinery can reduce protein aggregate burden and improve neuronal survival in cellular and animal models of neurodegeneration. However, translating these findings to clinical applications remains challenging due to the complex nature of ubiquitin signaling networks.

Research Directions

Current research focuses on:

• Developing selective E2/E3 modulators for neurodegeneration
• Understanding the interplay between different ubiquitin chain types
• Identifying biomarkers for UPS function
• Exploring gene therapy approaches to enhance ubiquitination capacity

Animal Models

UBE2K knockout mice have been generated and show developmental abnormalities, indicating its essential role in cellular function. Studies in these models reveal:

• Impaired DNA damage response
• Altered NF-κB signaling
• Increased sensitivity to cellular stress

These findings underscore the importance of proper ubiquitination in neuronal health and disease.

References

[Wu PY, et al, Ubc13 in signaling and disease (2006)](https://pubmed.ncbi.nlm.nih.gov/17063477/)

[Hofmann RM, Pickart CM, Ubc13 in ubiquitin chain synthesis (2001)](https://pubmed.ncbi.nlm.nih.gov/11389828/)

Pathway Diagram

The following diagram shows the key molecular relationships involving UBE2K Gene discovered through SciDEX knowledge graph analysis: