LRP3 — Low Density Lipoprotein Receptor-Related Protein 3
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gene554 wordssynced 2026-04-02
LRP3 Gene
Overview
LRP3 (low-density lipoprotein receptor-related protein 3) is a member of the LDL receptor family, a receptor superfamily involved in endocytosis and cell-surface signaling in the nervous system.[@herz2001] Compared with better-studied paralogs such as [LRP1](/proteins/lrp1), LRP3 remains under-characterized; however, emerging data suggest it can modulate amyloid precursor protein (APP)-related biology and therefore may influence Alzheimer's disease-relevant pathways.[@camporesi2021]
Gene Information
<div class="infobox infobox-gene">
| Property | Value | |---|---| | Gene Symbol | LRP3 | | Full Name | Low Density Lipoprotein Receptor-Related Protein 3 | | Chromosomal Location | 19q13.31 | | NCBI Gene ID | 4037 | | Ensembl ID | ENSG00000186603 | | UniProt ID | O75074 |
</div>
Biological Function
LRP-family proteins typically combine extracellular ligand-binding domains with transmembrane and cytoplasmic motifs that support ligand uptake, trafficking, and downstream signaling.[@herz2001] Within this framework, LRP3 is hypothesized to participate in membrane-protein turnover and lipoprotein-associated cargo handling, although its endogenous ligand repertoire in human brain tissue remains incompletely defined.[@herz2001][@camporesi2021]
What is currently supported:
...
LRP3 Gene
Overview
LRP3 (low-density lipoprotein receptor-related protein 3) is a member of the LDL receptor family, a receptor superfamily involved in endocytosis and cell-surface signaling in the nervous system.[@herz2001] Compared with better-studied paralogs such as [LRP1](/proteins/lrp1), LRP3 remains under-characterized; however, emerging data suggest it can modulate amyloid precursor protein (APP)-related biology and therefore may influence Alzheimer's disease-relevant pathways.[@camporesi2021]
Gene Information
<div class="infobox infobox-gene">
| Property | Value | |---|---| | Gene Symbol | LRP3 | | Full Name | Low Density Lipoprotein Receptor-Related Protein 3 | | Chromosomal Location | 19q13.31 | | NCBI Gene ID | 4037 | | Ensembl ID | ENSG00000186603 | | UniProt ID | O75074 |
</div>
Biological Function
LRP-family proteins typically combine extracellular ligand-binding domains with transmembrane and cytoplasmic motifs that support ligand uptake, trafficking, and downstream signaling.[@herz2001] Within this framework, LRP3 is hypothesized to participate in membrane-protein turnover and lipoprotein-associated cargo handling, although its endogenous ligand repertoire in human brain tissue remains incompletely defined.[@herz2001][@camporesi2021]
What is currently supported:
LRP3 belongs to a receptor class that regulates neuronal protein trafficking and extracellular ligand clearance.[@herz2001]
LRP3 expression has been detected in brain-relevant datasets, but regional and cell-type specificity requires better mapping in disease cohorts.[@camporesi2021]
Experimental perturbation of LRP3 can alter APP-related readouts in model systems.[@camporesi2021]
Relevance to Neurodegeneration
APP and Amyloid Pathobiology
Recent mechanistic work indicates that LRP3 can reduce APP levels, linking this receptor to amyloidogenic risk architecture.[@camporesi2021] This does not yet establish LRP3 as a primary causal Alzheimer's gene, but it supports a model where LRP3 acts as a pathway modifier of APP homeostasis.
Lipid and Receptor-Trafficking Context
Because LDL receptor family signaling intersects with lipid transport and synaptic receptor turnover, LRP3 may also influence neuronal resilience under metabolic and inflammatory stress states that accompany neurodegeneration.[@herz2001][@kanekiyo2014][@liu2013]
Evidence Strength
Evidence for LRP3 in neurodegeneration is currently early-stage:
Target validation: independent replication of LRP3 effects on APP processing and [Aβ](/proteins/amyloid-beta)-relevant outputs in human iPSC-derived [neurons](/entities/neurons).
Biomarker integration: test whether LRP3 expression signatures track with CSF/plasma amyloid and [tau](/proteins/tau) trajectories.
Combination strategy design: if LRP3 modulation proves robust, pair pathway interventions with established amyloid-directed therapies rather than replacement logic.
At present, there is no approved LRP3-directed therapy for neurodegenerative disease.
Research Gaps
Cell-type-resolved expression atlases for LRP3 in healthy vs disease brain.
Human genetic studies specifically powered for LRP3 variant effects on progression.
Mechanistic separation of direct APP effects vs secondary lipid-trafficking effects.
See Also
[LRP1](/proteins/lrp1)
[Amyloid Precursor Protein (APP)](/entities/app-protein)
[Herz J, Strickland DK, LRP: a multifunctional scavenger and signaling receptor (2001)](https://pubmed.ncbi.nlm.nih.gov/11642543/)
[Camporesi E, Nilsson N, Brinkmalm A, et al, The apolipoprotein receptor LRP3 compromises APP levels (2021)](https://pubmed.ncbi.nlm.nih.gov/34727970/)
[Kanekiyo T, Xu H, Bu G, ApoE and Aβ in Alzheimer's disease: accidental encounters or partners? (2014)](https://pubmed.ncbi.nlm.nih.gov/25109318/)
[Liu CC, Liu CC, Kanekiyo T, Xu H, Bu G, Apolipoprotein E and Alzheimer disease: risk, mechanisms and therapy (2013)](https://pubmed.ncbi.nlm.nih.gov/25896688/)