Lrrk1 Protein Leucine Rich Repeat Kinase 1 is an important component in the neurobiology of neurodegenerative diseases. This page provides detailed information about its structure, function, and role in disease processes.
Leucine-Rich Repeat Kinase 1 (LRRK1) is a large multi-domain protein with serine/threonine kinase activity that plays important roles in membrane trafficking, cytoskeletal dynamics, and cellular signaling[@marin2008]. While LRRK2 is more extensively studied in Parkinson's disease (PD), LRRK1 has emerged as a significant modifier of LRRK2 function and is itself implicated in PD pathogenesis, bone metabolism disorders, and cancer[@gilsbach2012].
Lrrk1 Protein Leucine Rich Repeat Kinase 1 is an important component in the neurobiology of neurodegenerative diseases. This page provides detailed information about its structure, function, and role in disease processes.
Leucine-Rich Repeat Kinase 1 (LRRK1) is a large multi-domain protein with serine/threonine kinase activity that plays important roles in membrane trafficking, cytoskeletal dynamics, and cellular signaling[@marin2008]. While LRRK2 is more extensively studied in Parkinson's disease (PD), LRRK1 has emerged as a significant modifier of LRRK2 function and is itself implicated in PD pathogenesis, bone metabolism disorders, and cancer[@gilsbach2012].
<div class="infobox infobox-protein">
<table>
<tr><th colspan="2" style="background:#f0f0f0;">LRRK1 Protein</th></tr>
<tr><td><strong>Protein Name</strong></td><td>Leucine-Rich Repeat Kinase 1</td></tr>
<tr><td><strong>Gene</strong></td><td>[LRRK1](/genes/lrrk1)</td></tr>
<tr><td><strong>UniProt ID</strong></td><td>[Q8IW41](https://www.uniprot.org/uniprot/Q8IW41)</td></tr>
<tr><td><strong>PDB ID(s)</strong></td><td>5DNO, 5DNR</td></tr>
<tr><td><strong>Molecular Weight</strong></td><td>278.5 kDa</td></tr>
<tr><td><strong>Subcellular Localization</strong></td><td>Cytoplasm, endosomal membranes</td></tr>
<tr><td><strong>Protein Family</strong></td><td>LRRK family</td></tr>
<tr><td><strong>Expression</strong></td><td>Broad tissue distribution (brain, bone, immune cells)</td></tr>
<tr>
<td class="label">Associated Diseases</td>
<td><a href="/wiki/als" style="color:#ef9a9a">Als</a>, <a href="/wiki/parkinson" style="color:#ef9a9a">Parkinson</a></td>
</tr>
<tr>
<td class="label">KG Connections</td>
<td><a href="/atlas" style="color:#4fc3f7">9 edges</a></td>
</tr>
</table>
</div>
LRRK1 contains multiple functional domains characteristic of the ROCO protein family[@deng2011]:
| Feature | LRRK1 | LRRK2 |
|---------|-------|-------|
| Molecular weight | 278 kDa | 286 kDa |
| GTPase activity | Lower | Higher |
| Kinase activity | Lower | Higher |
| PD mutations | Less common | Common (G2019S) |
| Expression | Broader | Brain-enriched |
LRRK1 and LRRK2 exhibit functional interactions[@biskup2006]:
LRRK1 involvement in PD is emerging[@hanna2020]:
Biallelic LRRK1 mutations cause a rare syndrome:
The study of Lrrk1 Protein Leucine Rich Repeat Kinase 1 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.