WIPI2 Protein is a protein involved in key cellular signaling pathways relevant to neurodegenerative diseases. This page provides comprehensive information about its structure, normal biological function, and role in disease pathogenesis.
WIPI2 Protein participates in critical cellular processes that, when dysregulated, contribute to neurodegeneration. Understanding this protein's function is essential for developing therapeutic interventions for Alzheimer's disease, Parkinson's disease, and related conditions.
| WIPI2 Protein | |
|---|---|
| Protein Name | WIPI2 |
| Gene | [WIPI2](/genes/wipi2) |
| UniProt ID | Q9Y5P8 |
| PDB Structure | 4CRR, 4D5H, 6C94 |
| Molecular Weight | 46 kDa |
| Subcellular Localization | Cytoplasmic membranes (PI3P-enriched) |
| Protein Family | PROPPIN family (beta-propeller) |
WIPI2 has a similar 7-bladed beta-propeller structure to WIPI1, with conserved phosphoinositide-binding motifs. WIPI2 exists in multiple isoforms (WIPI2a, WIPI2b) with distinct localizations. The protein binds PI3P through its conserved FRRG motif.
WIPI2 is a PI3P effector essential for autophagosome formation. Like WIPI1, it binds to PI3P on isolation membranes and recruits autophagy machinery including ATG12-ATG5-ATG16L1 and LC3. WIPI2 directly interacts with ATG16L1 and is required for LC3 lipidation. It is critical for both conventional and alternative autophagy.
WIPI2 is essential for neuronal autophagy and survival. Dysregulated WIPI2 function is implicated in AD and PD. In AD, WIPI2-mediated autophagy is impaired, contributing to Aβ and aggregate accumulation. In PD, WIPI2 plays roles in mitophagy.
Similar to WIPI1, WIPI2 modulators are being explored. Autophagy enhancers can boost WIPI2 function. Gene therapy approaches to restore WIPI2 expression are potential strategies.