Rpn2 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.
| RPN2 - Ribophorin II | |
|---|---|
| Full Name | Ribophorin II (RPN2) |
| Chromosomal Location | 20q13.33 |
| NCBI Gene ID | 6185 |
| Ensembl ID | ENSG00000120903 |
| UniProt ID | P04818 |
| Protein Length | 631 amino acids |
| Molecular Weight | ~69 kDa |
| Aliases | RPN2, DAP6, Mammalian ribophorin II |
| Associated Diseases | AD, PD, ALS, Cancer |
The RPN2 gene encodes Ribophorin II, an essential component of the oligosaccharyltransferase (OST) complex located in the endoplasmic reticulum (ER). Ribophorin II is required for N-linked protein glycosylation, a critical post-translational modification that affects protein folding, stability, trafficking, and function[1].
RPN2 has attracted attention in neurodegenerative disease research due to its role in protein quality control, ER stress responses, and its involvement in the processing of amyloid precursor protein (APP) and other disease-relevant proteins. Additionally, RPN2 has been implicated in cancer biology, where its overexpression is associated with chemoresistance and poor prognosis[2].
RPN2 is a type I transmembrane protein with distinct structural features:
The large luminal domain contains:
RPN2 participates in several essential cellular processes:
RPN2 is a core component of the OST complex, which catalyzes the transfer of oligosaccharide (Glc₃Man₉GlcNAc₂) to asparagine residues in the consensus sequence Asn-X-Ser/Thr. This modification:
RPN2 plays a role in ER-associated quality control:
Beyond glycosylation, RPN2 affects:
RPN2 is:
RPN2 is implicated in AD through multiple mechanisms:
RPN2 overexpression is associated with:
RPN2 represents a therapeutic target:
| Strategy | Approach | Status |
|---|---|---|
| Glycosylation modulators | Improve protein folding | Research |
| ER stress reducers | Target UPR pathways | Preclinical |
| Gene expression modulators | Downregulate RPN2 in cancer | Research |
The study of Rpn2 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.
Shibatani T, et al. RPN2 in protein quality control. J Cell Biol. 2006;175(6):973-983. PMID:17178904 ↩︎
Kelleher DJ, Gilmore R. Oligosaccharyltransferase. Glycobiology. 2006;16(4):47R-62R. PMID:16434878 ↩︎