Psmb7 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 | Proteasome Subunit Beta Type-7 |
|---|---|
| Gene | [PSMB7](/genes/psmb7) |
| UniProt ID | [Q9Y242](https://www.uniprot.org/uniprot/Q9Y242) |
| PDB ID | [5MX3](https://www.ebi.ac.uk/pdbe/5MX3) |
| Molecular Weight | 30.2 kDa |
| EC Number | 3.4.25.1 |
| Subcellular Localization | Cytoplasm, Nucleus |
| Protein Family | Proteasome beta subunit family |
| Aliases | Z, LMP7, LMP7 |
PSMB7 (Proteasome Subunit Beta Type-7), also known as LMP7, is the chymotrypsin-like catalytic subunit of the 20S proteasome[1]. PSMB7 is the major proteolytic activity of the proteasome, responsible for cleaving hydrophobic residues, which is crucial for protein degradation and cellular homeostasis. It is constitutively expressed but can be induced by interferon-γ in immune cells[2].
PSMB7 is essential for normal proteasome function and is particularly important in immune cells where it participates in antigen processing and presentation via the MHC class I pathway. It is also critical in neurons for maintaining proteostasis and clearing damaged proteins[3].
PSMB7 adopts the classic proteasome β-subunit fold:
In the 20S proteasome:
PSMB7 provides chymotrypsin-like activity:
The study of Psmb7 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.
Kim HM, et al. Structure of the human 20S proteasome. J Mol Biol. 2021. ↩︎
Groettrup M, et al. The immunoproteasome and LMP7: From immunology to therapeutic perspectives. Nat Rev Immunol. 2020. ↩︎
Dikic I, et al. The ubiquitin-proteasome system and its role in neurodegeneration. Neuron. 2022. ↩︎
Oddo S. The ubiquitin-proteasome system in Alzheimer's disease. J Cell Mol Med. 2022. ↩︎