.infobox.infix-gene
; Gene Symbol
: LRP6
; Full Name
: LDL Receptor Related Protein 6
; Chromosomal Location
: 12p13.2
; NCBI Gene ID
: 4040
; OMIM
: 607203
; Ensembl ID
: ENSG00000170054
; UniProt ID
: O75151
; Associated Diseases
: Alzheimer's Disease, Parkinson's Disease, Coronary Artery Disease
Lrp6 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.
LRP6 (Low-Density Lipoprotein Receptor-Related Protein 6) is a critical co-receptor in the canonical Wnt/β-catenin signaling pathway. Located on chromosome 12p13.2, LRP6 encodes a transmembrane protein that functions as a co-receptor for Wnt ligands alongside Frizzled receptors. The Wnt/LRP6 signaling axis is essential for embryonic neural development, adult neurogenesis, synaptic plasticity, and neuronal survival. Notably, LRP6 variants have been genetically linked to increased risk of Alzheimer's disease (AD) and coronary artery disease, positioning it as a key nexus between metabolic and neurodegenerative processes Citation 1.
The LRP6 protein belongs to the LDLR family and contains distinct structural domains that enable its role in Wnt signal transduction. These include multiple LDL receptor repeat (LDLR) domains, epidermal growth factor (EGF) precursor-like repeats, and a cytoplasmic tail with conserved PPPS/TPXS motifs that are phosphorylated upon Wnt activation Citation 2.
LRP6 possesses a complex multi-domain structure:
| Domain | Position | Function |
|---|---|---|
| Signal peptide | 1-23 | Protein targeting |
| LDLR repeats 1-3 | 24-200 | Ligand binding |
| EGF-like repeats | 201-350 | Protein interactions |
| LDLR repeats 4-5 | 351-500 | Co-receptor function |
| Transmembrane | 1380-1402 | Membrane anchoring |
| Cytoplasmic tail | 1403-1613 | Signal transduction |
LRP6 functions as a essential co-receptor in canonical Wnt signaling:
Canonical Pathway Activation:
Wnt Target Genes Include:
During development, LRP6-mediated Wnt signaling regulates:
In the adult brain, LRP6 continues to play important roles:
Neurogenesis:
Synaptic Plasticity:
Neuronal Survival:
LRP6 has emerged as a significant AD risk gene:
Genetic Evidence:
Pathogenic Mechanisms:
Therapeutic Implications:
LRP6 connections to PD include:
Genetic variants in LRP6 (particularly R611) are associated with:
Several therapeutic strategies are being explored:
| Partner | Interaction Type | Function |
|---|---|---|
| Frizzled (FZD) | Co-receptor | Wnt signal reception |
| Axin | Direct binding | β-catenin regulation |
| GSK3β | Phosphorylation | Kinase regulation |
| Dkk1 | Antagonist | Wnt inhibition |
| LDL | Ligand | Lipid metabolism |
| Aβ | Binding | Amyloid interaction |
| DVL | Downstream | Signal transduction |
LRP6 is expressed in various brain regions:
Page updated: 2026-03-07
The study of Lrp6 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.