G Protein Coupled Receptor 37 Like 1 Protein is an important component in the neurobiology of neurodegenerative diseases. This page provides detailed information about its structure, function, and role in disease processes.
| Protein Name | G Protein-Coupled Receptor 37 Like 1 |
|---|---|
| Gene | GPR37L1 |
| UniProt ID | O14924 |
| Molecular Weight | 67 kDa |
| Subcellular Localization | Endoplasmic Reticulum, Cell Membrane |
| Protein Family | GPR37 family, Class A GPCR |
| Primary G Protein | Gαs |
| Tissue Expression | Brain (oligodendrocytes, neurons), peripheral nervous system |
G Protein-Coupled Receptor 37 Like 1 (GPR37L1), also known as ETBR-like protein 1 (ETBL1), is a member of the GPR37 family of G protein-coupled receptors. GPR37L1 is predominantly expressed in oligodendrocytes and astrocytes in the central nervous system, where it plays important roles in myelination, oligodendrocyte differentiation, and neuroprotection. Notably, GPR37L1 has been implicated in the pathogenesis of Parkinson's disease (PD), multiple system atrophy (MSA), and other neurodegenerative disorders.
GPR37L1 is a Class A (rhodopsin-like) GPCR with the canonical seven transmembrane domain architecture:
The receptor contains several structural features unique to the GPR37 family, including an extended N-terminus (~200 amino acids) and a DRY motif in TM3 that regulates G protein coupling.
GPR37L1 signals primarily through Gαs proteins to activate adenylyl cyclase and increase intracellular cAMP levels. This signaling cascade can:
GPR37L1 interacts with several proteins relevant to neurodegeneration:
Parkin (PARK2): GPR37L1 is a substrate for the E3 ubiquitin ligase parkin, linking it to the ubiquitin-proteasome system. Parkin-mediated ubiquitination may target GPR37L1 for degradation.
DJ-1 (PARK7): GPR37L1 interacts with DJ-1, and DJ-1 loss-of-function enhances GPR37L1 toxicity.
Glial cell line-derived neurotrophic factor (GDNF): GPR37L1 may modulate GDNF signaling in dopaminergic neurons.
ATP13A2 (PARK9): GPR37L1 trafficking is affected by ATP13A2 loss, linking it to Kufor-Rakeb syndrome.
GPR37L1 is highly expressed in oligodendrocyte precursor cells (OPCs) and mature oligodendrocytes:
In neurons, GPR37L1:
GPR37L1 participates in cross-talk between astrocytes/oligodendrocytes and neurons, supporting neuronal metabolic and trophic support.
GPR37L1 accumulates in Lewy bodies in PD brains, and genetic studies have identified GPR37L1 variants associated with PD risk. GPR37L1 knockout mice display:
GPR37L1 is a major component of glial cytoplasmic inclusions (GCIs) in MSA, the hallmark oligodendroglial inclusions. GPR37L1 aggregation:
AAV-mediated GPR37L1 delivery to enhance cAMP signaling in oligodendrocytes is being explored for MSA and PD.
GPR37L1 levels in CSF may serve as a biomarker for oligodendrocyte dysfunction in MSA and PD.
The study of G Protein Coupled Receptor 37 Like 1 Protein 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.