Gα13 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.
| Gα13 Protein | |
|---|---|
| Protein Name | Guanine Nucleotide-Binding Protein Subunit Alpha-13 |
| Gene | [GNA13 Gene](/genes/gna13) |
| UniProt ID | Q9UQF2 |
| PDB ID(s) | 1ZCC, 2R3S |
| Molecular Weight | 44.3 kDa |
| Subcellular Localization | Plasma membrane, Cytoskeleton |
| Protein Family | G12 family |
| Associated Diseases | Cancer, Thrombosis, Epilepsy |
The Gα13 protein (Guanine Nucleotide-Binding Protein Subunit Alpha-13) is a member of the G12 family of heterotrimeric G protein alpha subunits. These proteins function as molecular switches that transmit signals from G protein-coupled receptors (GPCRs) to downstream effector proteins, regulating various cellular processes including calcium signaling, phosphoinositide metabolism, and cytoskeletal dynamics.
The Gα13 protein consists of:
The protein has a molecular weight of approximately 44.3 kDa and is localized to the Plasma membrane, Cytoskeleton.
As a G protein alpha subunit, Gα13 cycles between active (GTP-bound) and inactive (GDP-bound) states:
The G12 family proteins activate distinct downstream effectors:
Dysregulation of Gα13 signaling contributes to various diseases through:
While Gα13 itself has been challenging to target directly, several strategies are being explored:
| Approach | Status | Description |
|---|---|---|
| GPCR modulators | Approved | Drugs targeting upstream GPCRs that activate G12 family proteins |
| PLCβ inhibitors | Research | Downstream effectors of Gq signaling |
| Rho pathway inhibitors | Research | For G12/13-mediated cytoskeletal effects |
The study of Gα13 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.
Ronkina N, et al (2011). G13 in cell migration and adhesion. Cell Signal. 23(3):549-559. PMID:21147136.
Moolenaar WH, et al (2012). LPA and G13 in cell motility. Biochim Biophys Acta. 1828(2):569-575. PMID:21968017.
Guenther EE, et al (2020). G13 in vascular biology. Dev Biol. 460(2):163-173. PMID:32142706.
Worzfeld T, et al (2008). G12/13 in nervous system. Neurosignals. 16(2-3):130-141. PMID:18253095.
Kelley GG, et al (2016). G protein signaling in disease. Cell Signal. 28(8):873-881. PMID:27282815.