| CACNG1 Protein | |
|---|---|
| Protein Name | Calcium channel gamma-1 subunit |
| Gene | [CACNG1](/genes/cacng1) |
| Category | Protein |
| Path | /proteins/cacng1-protein |
| UniProt ID | Q9Y6X7 |
| Protein Family | Calcium channel gamma subunit |
The CACNG1 protein (Calcium Channel Gamma-1 Subunit) is a member of the transmembrane protein family that functions as an auxiliary subunit of voltage-gated calcium channels. This protein plays a critical role in modulating calcium channel trafficking, gating properties, and neuronal signaling. The CACNG1 gene encodes a 270-amino acid protein that is primarily expressed in skeletal muscle and to a lesser extent in neuronal tissues.
CACNG1 functions as an auxiliary subunit of L-type voltage-gated calcium channels (particularly Cav1.1 and Cav1.2). The gamma subunits interact with the main alpha1 subunit to:
While primarily expressed in skeletal muscle tissue where it associates with Cav1.1 channels in the sarcoplasmic reticulum, CACNG1 is also expressed in various neuronal populations. In the brain, it contributes to calcium signaling in motor neurons and hippocampal neurons.
Alterations in CACNG1 function have been implicated in several neurological conditions:
As the primary gamma subunit in skeletal muscle:
CACNG1 assembles with other subunits to form the complete calcium channel:
Alpha1 (Cav1.1/Cav1.2) + Beta (β1-β4) + Alpha2-Delta (1-4) + Gamma (1-8)
The gamma subunit contains four transmembrane domains with intracellular N- and C-termini, allowing interaction with both extracellular and intracellular components of the channel complex.
CACNG1 interacts with several key signaling pathways:
The gamma subunits represent potential therapeutic targets for:
Current research focuses on:
CACNG1 interacts with: