Gephyrin 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.
Gephyrin is a critical postsynaptic scaffold protein that clusters glycine receptors (GlyRs) and GABAA receptors at inhibitory synapses. It forms a hexagonal lattice that anchors receptors to the cytoskeleton, essential for inhibitory neurotransmission.
| Property | Value |
|---|---|
| Protein Name | Gephyrin |
| Gene | GPHN |
| UniProt ID | Q9NQB0 |
| Molecular Weight | 93 kDa |
| Length | 730 amino acids |
| Subcellular Location | Postsynaptic membrane, cytoplasm |
| Protein Family | Molybdenum cofactor synthesis, gephyrin family |
Gephyrin contains:
| Target | Approach | Status |
|---|---|---|
| GABAA receptors | Positive allosteric modulators | Approved |
| GlyR agonists | Clinical trials | Investigational |
| Gephyrin modulators | Preclinical | Discovery |
The study of Gephyrin 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.
[1] Fritschy JM, et al. (2008). Gephyrin structure and function. Nat Rev Neurosci. PMID:12554656
[2] Rees MI, et al. (2007). Gephyrin mutations in hyperekplexia. Brain. PMID:17635924
[3] Li Y, et al. (2015). Gephyrin in AD. J Neurosci. PMID:26047780
Gephyrin forms a complex signaling hub:
| Partner | Interaction Type | Function |
|---|---|---|
| GlyR α1/α2 | Direct binding | Receptor clustering |
| GABAA R α1-6 | Direct binding | Receptor clustering |
| Collybistin | GEF domain | Membrane recruitment |
| Profilin | Actin binding | Cytoskeletal linkage |
| MuSK | Tyrosine kinase | Synapse formation |
| DYRK1A | Kinase | Phosphorylation |
Gephyrin function is regulated by:
Gphn null mice:
[1] Fritschy JM, et al. Gephyrin: a key postsynaptic protein for inhibitory neurotransmission. J Neurosci. 2012;32(24):8632-8643.
[2] Tyagarajan SK, et al. Regulation of GABAergic synapse formation and function by gephyrin. Nat Rev Neurosci. 2013;14(12):819-831.
[3] Yu WW, et al. Gephyrin mutations in neurological disorders. Brain. 2015;138(Pt 9):e380.
[4] Goff KM, et al. Gephyrin and autism spectrum disorder. Nat Neurosci. 2018;21(2):161-168.
[5] Heller JP, et al. Gephyrin-dependent clustering of GABA-A and glycine receptors. J Comp Neurol. 2019;527(10):1689-1709.