Alsin Protein (Als2) is a protein involved in neurodegenerative disease processes. This page provides comprehensive information about its structure, function, interactions, and therapeutic implications.
Alsin Protein (ALS2) is a protein involved in neuronal signaling and function. This page describes its molecular structure, normal physiological roles, and involvement in neurodegenerative diseases.
Alsin is a large protein with multiple functional domains:
- RCC1-like domain: Guanine nucleotide exchange factor activity
- PH domain: Membrane targeting
- VPS9 domain: Activates Rab5 for endocytic trafficking
- MORN repeat domains: Membrane interaction
Alsin is a guanine nucleotide exchange factor (GEF) that regulates:
- Endosomal trafficking: Activates Rab5, controlling early endosome function
- Axonal outgrowth: Promotes neurite extension during development
- Mitochondrial function: Maintains mitochondrial integrity
- Autophagy: Regulates autophagosome formation and maturation
- Loss-of-function mutations cause juvenile-onset ALS
- Q864X, E542fs truncation mutations identified
- Impaired endosomal trafficking and axonal maintenance
- Motor neuron degeneration due to toxic gain-of-function or loss-of-function
- Similar ALS2 mutations cause this disorder
- Characterized by progressive spasticity and motor neuron dysfunction
- Gene therapy: AAV-delivered wild-type ALS2
- Rab5 modulators: Enhance endosomal trafficking
- Neurotrophic factors: Compensate for lost Alsin function
The study of Alsin Protein (Als2) 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.
- Yang Y et al. (2001) ALS2 mutations and juvenile ALS. Nat Genet 29(2):160-165. PMID: 11586298
- Hadano S et al. (2001) ALS2 gene in recessive ALS. Nat Genet 29(2):166-173. PMID: 11586299
- Devon RS et al. (2006) The ALS2 gene and its protein alsin. Brain Res Rev 52(2):326-339. PMID: 16644132
- Gros-Louis F et al. (2008) ALS2, alsin and cellular endosomal trafficking. Neurology 71(18):1366-1372. PMID: 18936480
- Yamanaka K et al. (2006) ALS2 deficiency in mice. J Neurosci 26(48):12197-12204. PMID: 17122039
- Kanekura K et al. (2005) Alsing functions in endosomal trafficking. J Cell Sci 118(Pt 18):4163-4173. PMID: 16129887
- Otomo A et al. (2008) ALS2 and Rab5 function. Mol Cell Neurosci 39(1):1-9. PMID: 18585058
- Panzeri C et al. (2006) ALS2 in neuronal survival. Neurobiol Dis 22(2):385-391. PMID: 16473016