Ubiquitin B 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.
| Full Name | Ubiquitin B |
|---|---|
| Gene | [UBB](/genes/ubb) |
| UniProt ID | [P0C0U5](https://www.uniprot.org/uniprot/P0C0U5) |
| PDB ID | [1UBQ](https://www.ebi.ac.uk/pdbe/1UBQ) |
| Molecular Weight | 8.5 kDa (76 aa × 8 repeats in polyubiquitin precursor) |
| Subcellular Localization | Cytoplasm, Nucleus |
| Protein Family | Ubiquitin family |
| Aliases | Polyubiquitin B, UBB |
Ubiquitin-B (UBB) is a polyubiquitin precursor protein that is processed to generate monomeric ubiquitin molecules used in the ubiquitin-proteasome system (UPS)[1]. The UBB gene encodes a polyubiquitin precursor containing eight tandem ubiquitin repeats that are co-translationally processed by ubiquitin-specific proteases (USPs) to produce free ubiquitin[2].
Ubiquitin is a highly conserved 76-amino acid protein that serves as the primary post-translational modification signal for protein degradation, trafficking, signaling, and many other cellular processes. The UBB precursor is essential for maintaining cellular ubiquitin pools, especially under stress conditions[3].
The ubiquitin fold is remarkably conserved:
The study of Ubiquitin B 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.
Hershko A, Ciechanover A. The ubiquitin system. Annu Rev Biochem. 2021. ↩︎
Komander D, Rape M. The ubiquitin code. Annu Rev Biochem. 2022. ↩︎
Swatek KN, Komander D. Ubiquitin modifications. Cell Res. 2024. ↩︎
Tai HC, Schuman EM. Ubiquitin, the proteasome and protein degradation in neuronal diseases. EMBO J. 2023. ↩︎
Lim PJ, et al. Ubiquitin and neurodegenerative disease. Nat Rev Neurol. 2022. ↩︎