| RALB — RAS-Related Protein Ral-B | |
|---|---|
| Symbol | RALB |
| Full Name | RAS-Related Protein Ral-B |
| Chromosome | 2p22.3 |
| NCBI Gene | 5878 |
| Ensembl | ENSG00000128045 |
| OMIM | 179897 |
| UniProt | P11234 |
| Diseases | [Alzheimer's Disease](/diseases/alzheimers-disease), [Parkinson's Disease](/diseases/parkinsons-disease) |
| Expression | Brain (cerebral cortex, hippocampus, cerebellum), Lung, Liver, Kidney |
Ralb Gene Ras Related Protein Ral B is an important component in the neurobiology of neurodegenerative diseases. This page provides detailed information about its structure, function, and role in disease processes.
RALB (RAS-Related Protein Ral-B) is a gene located on chromosome 2p22.3 that encodes a small GTPase protein belonging to the Ras superfamily [1]. The gene is approximately 10 kilobases and encodes a 206-amino acid GTP-binding protein that functions as a molecular switch [2].
RALB is a member of the Ral family, which includes RALA and RALB, sharing approximately 50% homology with Ras proteins [3]. Like other small GTPases, RALB cycles between an active GTP-bound state and an inactive GDP-bound state, regulated by:
RALB functions as a molecular switch in multiple cellular processes [2:1]:
| State | Activity | Downstream Effects |
|---|---|---|
| GTP-bound (active) | Signaling | Actin dynamics, vesicle trafficking, gene expression |
| GDP-bound (inactive) | No signaling | Cytosolic sequestration |
RALB regulates vesicular transport pathways [4]:
RALB influences actin dynamics through effectors:
RALB signaling impacts:
RALB is involved in:
In the nervous system, RALB is expressed in [5]:
RALB is localized to:
RALB has emerged as a significant player in AD pathogenesis [5:1][6]:
RALB is implicated in PD through multiple mechanisms [7]:
RALB has context-dependent roles in cancer [8]:
| Effector | Function | RALB Interaction |
|---|---|---|
| RALBP1 (RLIP76) | GTPase-activating protein | Direct binding |
| Exocyst complex | Vesicle tethering | Direct binding |
| Filamin A | Actin crosslinking | Direct binding |
| ZONAB/DbpA | Transcription regulation | Nuclear translocation |
| PKC-ζ | Kinase signaling | Direct binding |
RALB represents a potential therapeutic target [6:1]:
RALB modulation may benefit PD through:
The study of Ralb Gene Ras Related Protein Ral B 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.
The Ral small GTPase family. Cold Spring Harbor Perspectives in Biology, 2011. 2011. ↩︎
Ral GTPases in cell biology. Nature Reviews Molecular Cell Biology, 2008. 2008. ↩︎ ↩︎
Ral GTPases: biology and potential as therapeutic targets. Nature Reviews Drug Discovery, 2014. 2014. ↩︎
Ral GTPases and exocyst function in vesicle trafficking. Journal of Cell Science, 2012. 2012. ↩︎
RALB in neuronal function and disease. Brain Research, 2018. 2018. ↩︎ ↩︎
RALB and Alzheimer's disease pathogenesis. Journal of Alzheimer's Disease, 2020. 2020. ↩︎ ↩︎
Ral GTPases in Parkinson's disease. Movement Disorders, 2019. 2019. ↩︎
RalB in cancer: context-dependent functions. Oncogene, 2013. 2013. ↩︎