UBB — Ubiquitin B

UBB — Ubiquitin B

Introduction

Ubb — Ubiquitin B 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"> [@dawson2003]
<div class="infobox-header">UBB Gene</div> [@rothenberg2010]
<div class="infobox-content"> [@zheng2018]
<table> [@layfield2005]
<tr><th>Symbol</th><td>UBB</td></tr> [@tan2008]
<tr><th>Full Name</th><td>Ubiquitin B</td></tr>
<tr><th>Chromosomal Location</th><td>17p13.1</td></tr>
<tr><th>NCBI Gene ID</th><td>[7327](https://www.ncbi.nlm.nih.gov/gene/7327)</td></tr>
<tr><th>Ensembl ID</th><td>ENSG00000104140</td></tr>
<tr><th>UniProt ID</th><td>[P0CG48](https://www.uniprot.org/uniprot/P0CG48)</td></tr>
<tr><th>Protein</th><td>Ubiquitin B</td></tr>
<tr><th>Associated Diseases</th><td>Alzheimer's Disease, Parkinson's Disease, Huntington's Disease, ALS</td></tr>
</table>
</div>
</div>

Overview

...

UBB — Ubiquitin B

Introduction

Ubb — Ubiquitin B 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"> [@dawson2003]
<div class="infobox-header">UBB Gene</div> [@rothenberg2010]
<div class="infobox-content"> [@zheng2018]
<table> [@layfield2005]
<tr><th>Symbol</th><td>UBB</td></tr> [@tan2008]
<tr><th>Full Name</th><td>Ubiquitin B</td></tr>
<tr><th>Chromosomal Location</th><td>17p13.1</td></tr>
<tr><th>NCBI Gene ID</th><td>[7327](https://www.ncbi.nlm.nih.gov/gene/7327)</td></tr>
<tr><th>Ensembl ID</th><td>ENSG00000104140</td></tr>
<tr><th>UniProt ID</th><td>[P0CG48](https://www.uniprot.org/uniprot/P0CG48)</td></tr>
<tr><th>Protein</th><td>Ubiquitin B</td></tr>
<tr><th>Associated Diseases</th><td>Alzheimer's Disease, Parkinson's Disease, Huntington's Disease, ALS</td></tr>
</table>
</div>
</div>

Overview

UBB (Ubiquitin B) encodes polyubiquitin, the precursor protein for ubiquitin molecules. Ubiquitin is essential for protein degradation via the [ubiquitin-proteasome system](/cell-types/ubiquitin-proteasome-system) (UPS) and autophagy. Defects in ubiquitin metabolism are central to neurodegenerative diseases, where accumulation of ubiquitin-positive inclusions is a hallmark finding.

Normal Function

UBB produces polyubiquitin chains that are processed into单体 ubiquitin:

• Protein degradation: Ubiquitin tags proteins for proteasomal or lysosomal degradation^[1]
• Signal transduction: Ubiquitin serves as a signaling molecule
• DNA repair: Ubiquitin participates in DNA damage response
• Endocytosis: Ubiquitin marks membrane proteins for endocytosis
• Quality control: Ubiquitin targets misfolded and damaged proteins

Disease Associations

Alzheimer's Disease

• Ubiquitin-positive neurofibrillary tangles and plaques in AD brain^[2]
• UBB+1 frameshift mutation causes accumulation of abnormal ubiquitin
• Impaired proteasome function in AD [neurons](/entities/neurons)
• Ubiquitination defects contribute to protein aggregate accumulation

Parkinson's Disease

• Lewy bodies are ubiquitin-positive
• PARK2 (Parkin) is an E3 ubiquitin ligase
• PINK1 regulates parkin-mediated mitophagy
• UBB alterations in PD brain

Huntington's Disease

• Mutant [huntingtin](/proteins/huntingtin-protein) is ubiquitinated
• Impaired [UPS](/mechanisms/ubiquitin-proteasome-system) function in HD
• Ubiquitin-positive inclusions in HD brain

ALS

• Ubiquitin-positive inclusions in motor neurons
• Mutations in ubiquitin-related genes (UBQLN2, VCP)
• [TDP-43](/proteins/tdp-43) proteinopathy involves ubiquitination

Therapeutic Implications

• Proteasome enhancers
• [UPS](/mechanisms/ubiquitin-proteasome-system) modulators
• [Autophagy](/entities/autophagy) inducers as compensation for UPS dysfunction

Key Publications

Hershko A, Ciechanover A (1998). The ubiquitin system. Annu Rev Biochem. PMID: 9734497(https://pubmed.ncbi.nlm.nih.gov/9734497/)

Dawson TM, Dawson VL (2003). Ubiquitin metabolism in neurodegenerative disease. J Clin Invest. PMID: 12840061(https://pubmed.ncbi.nlm.nih.gov/12840061/)

Rothenberg C, et al. (2010). Ubiquitin accumulation in neurodegeneration. Nat Rev Neurosci. PMID: 20720502(https://pubmed.ncbi.nlm.nih.gov/20720502/)

Zheng Q, et al. (2018). UBB+1 and proteasome dysfunction in AD. Mol Neurodegener. PMID: 30545386(https://pubmed.ncbi.nlm.nih.gov/30545386/)

Research Directions

Model Systems

Research platforms for UBB:

• Transgenic Mice: Ubiquitin overexpression
• Knockout Studies: Conditional deletions
• Cell Culture: Neuronal stress models
• iPSC Models: Patient-derived neurons

Therapeutic Approaches

Targeting ubiquitin system:

• Proteasome Modulators: Enhancing or inhibiting degradation
• Deubiquitinase Inhibitors: DUB targeting
• UPS Enhancers: Improving protein clearance
• Gene Therapy: Modulating ubiquitin expression

See Also

• [Protein Quality Control Network](/mechanisms/protein-quality-control-network)
• [Alzheimer's Disease](/diseases/alzheimers-disease)
• [Parkinson's Disease](/diseases/parkinsons-disease)
• [Huntington's Disease](/diseases/huntingtons)
• [ALS](/diseases/als)

Background

The study of Ubb — Ubiquitin B 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

• [NCBI Gene: UBB](https://www.ncbi.nlm.nih.gov/gene/7327)
• [UniProt: UBB](https://www.uniprot.org/uniprot/P0CG48)

Brain Atlas Resources

• Allen Human Brain Atlas: [UBB — Ubiquitin B expression search](https://human.brain-map.org/microarray/search/show?search_term=UBB)
• Allen Cell Type Atlas: [Transcriptomic cell type reference](https://portal.brain-map.org/atlases-and-data/rnaseq)
• Allen Mouse Brain Atlas: [UBB — Ubiquitin B search](https://mouse.brain-map.org/search/index.html?query=UBB)

[UBB — Ubiquitin B - Allen Brain Atlas](https://human.brain-map.org/microarray/search/show?search_term=UBB)

References

[Unknown, Hershko A, Ciechanover A (1998). "The ubiquitin system." Annual Review of Biochemistry (1998)](https://pubmed.ncbi.nlm.nih.gov/9734497/)

[Unknown, Dawson TM, Dawson VL (2003). "Ubiquitin metabolism in neurodegenerative disease." Journal of Clinical Investigation (2003)](https://pubmed.ncbi.nlm.nih.gov/12840061/)

[Rothenberg C, et al, (2010) (2010)](https://pubmed.ncbi.nlm.nih.gov/20720502/)

[Zheng Q, et al, (2018) (2018)](https://pubmed.ncbi.nlm.nih.gov/30545386/)

[Layfield R, et al, (2005) (2005)](https://pubmed.ncbi.nlm.nih.gov/15936065/)

[Tan JM, et al, (2008) (2008)](https://pubmed.ncbi.nlm.nih.gov/18208540/)

Pathway Diagram

The following diagram shows the key molecular relationships involving UBB — Ubiquitin B discovered through SciDEX knowledge graph analysis: