Α2Δ 4 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.
This gene/protein plays important roles in neuronal function and is relevant to neurodegenerative disease research.
| Calcium Channel Auxiliary Subunit Alpha2delta-4 | |
|---|---|
| Protein Name | α2δ-4 (Cavα2δ-4) |
| Gene | CACNA2D4 |
| UniProt ID | Q7Z3Y7 |
| PDB Structures | 6JP5 |
| Molecular Weight | ~130 kDa |
| Subcellular Localization | Plasma membrane (photoreceptor cells) |
| Protein Family | Voltage-gated calcium channel auxiliary subunits |
The α2δ-4 protein is structurally similar to other α2δ subunits, consisting of an extracellular α2 domain disulfide-linked to a δ subunit with a transmembrane anchor. The protein contains a Von Willebrand factor A domain (VWA) important for interaction with the main calcium channel α1 subunit.
α2δ-4 is primarily expressed in retinal photoreceptors and is essential for proper calcium channel function in these cells. It associates with Cav1.4 channels in photoreceptor synaptic terminals, where it is critical for neurotransmitter release and photoreceptor viability. The subunit influences channel trafficking to the synaptic ribbon and modulates gating properties.
| Disease | Role | Mechanism |
|---|---|---|
| Retinitis Pigmentosa | Pathogenic | Loss-of-function leads to photoreceptor degeneration |
| Cone-Rod Dystrophy | Pathogenic | Impaired calcium signaling in cone and rod cells |
| Autism Spectrum Disorder | Risk factor | Synaptic calcium dysregulation |
The study of Α2Δ 4 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.