Ubiquitin C 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 C |
|---|---|
| Gene | [UBC](/genes/ubc) |
| UniProt ID | [P0C0U5](https://www.uniprot.org/uniprot/P0C0U5) |
| PDB ID | [1UBQ](https://www.ebi.ac.uk/pdbe/1UBQ) |
| Molecular Weight | 8.5 kDa (per ubiquitin monomer) |
| Subcellular Localization | Cytoplasm, Nucleus |
| Protein Family | Ubiquitin family |
| Aliases | Polyubiquitin C, UBC |
Ubiquitin-C (UBC) is the second major polyubiquitin gene in humans (alongside UBB) that provides ubiquitin monomers for the ubiquitin-proteasome system and various ubiquitin-dependent cellular processes[1]. The UBC gene encodes a polyubiquitin precursor that is processed to generate multiple ubiquitin molecules essential for cellular homeostasis[2].
UBC is expressed ubiquitously at high levels in all tissues, including the brain, where it is critical for maintaining cellular protein quality control through the UPS and regulating numerous signaling pathways. The ubiquitin code—combinations of ubiquitin chain types, lengths, and linkages—determines the fate of modified proteins[3].
| Linkage | Function |
|---|---|
| K48 | Proteasomal degradation |
| K63 | Signaling, endocytosis, DNA repair |
| K27 | Autophagy, stress response |
| K6 | DNA damage, mitophagy |
| K11 | Cell cycle, proteasome |
| K33 | Synaptic function |
| M1 | Linear chains, NF-κB |
The study of Ubiquitin C 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: From basic mechanisms to human disease. Annu Rev Biochem. 2023. ↩︎
Komander D, et al. The ubiquitin code: Expanding the complexity of ubiquitin modifications. Nat Rev Mol Cell Biol. 2024. ↩︎
Yau RG, et al. Assembly and functions of the ubiquitin code. Mol Cell. 2023. ↩︎
Tai HC, Schuman EM. Ubiquitin in neuronal function and dysfunction. Nat Rev Neurosci. 2022. ↩︎