Atxn10 Protein plays an important role in the study of neurodegenerative diseases. This page provides comprehensive information about this topic, including its mechanisms, significance in disease processes, and therapeutic implications.
Ataxin-10 (ATXN10) is a 47.5 kDa protein encoded by the ATXN10 gene, belonging to the ataxin family of proteins characterized by polyglutamine expansions in various spinocerebellar ataxias. Originally identified as the causative protein in Spinocerebellar Ataxia Type 10 (SCA10), ataxin-10 has emerged as a protein with broader implications in neuronal function and multiple neurodegenerative diseases. This page provides comprehensive information about ataxin-10's structure, molecular functions, protein interactions, and its role in neurodegenerative disease pathogenesis.
| Protein Name | Ataxin-10 |
|---|---|
| Gene | ATXN10 |
| UniProt ID | Q9UBB4 |
| PDB ID | 2JOB, 2MSU |
| Molecular Weight | 47.5 kDa |
| Amino Acids | 424 |
| Subcellular Localization | Cytoplasm, Endoplasmic Reticulum |
| Protein Family | Ataxin family |
| Domain Architecture | Armadillo repeats |
Ataxin-10 possesses a distinctive domain architecture that underlies its molecular functions:
The armadillo repeats of ataxin-10 form a superhelical structure that creates a large interaction surface for binding various partner proteins[1]. This structural organization allows ataxin-10 to function as a scaffolding protein, bringing together multiple signaling components. The protein adopts a predominantly alpha-helical conformation, with the ARM domain forming a right-handed superhelix[2].
Ataxin-10 performs essential functions in neuronal cells that are critical for cellular homeostasis and survival:
Ataxin-10 exhibits neuroprotective properties through multiple mechanisms:
One of the most well-characterized functions of ataxin-10 is its interaction with PP2A:
Ataxin-10 plays a critical role in neuronal calcium regulation:
SCA10 is an autosomal dominant neurodegenerative disorder caused by ATTCT pentanucleotide repeat expansions in the ATXN10 gene:
RNA-mediated toxicity:
Loss of normal function:
Repeat-associated non-ATG (RAN) translation:
Ataxin-10 has been implicated in Alzheimer's disease pathogenesis:
Ataxin-10 interacts with numerous proteins that mediate its functions:
| Partner Protein | Interaction Type | Functional Consequence |
|---|---|---|
| PP2A (PPP2R2A) | Direct binding | Activation of tau dephosphorylation |
| IP3R | Regulatory | Modulation of calcium release |
| Bcl-2 | Anti-apoptotic | Inhibition of apoptosis |
| Hsp90 | Molecular chaperone | Protein folding stability |
| p53 | Transcriptional regulation | Apoptosis modulation |
| LRRK2 | Potential | Parkinson's disease link |
Understanding ataxin-10's role in neurodegeneration has opened therapeutic avenues:
Matsuura T, et al. (2000). "Spinocerebellar ataxia type 10: identification of the repeat expansion and characterization of the gene." Nat Genet. 25(2):132-134. DOI:10.1038/75988
Baur JA, et al. (2006). "Spinocerebellar ataxia type 10: a disease of mitochondria?" Neurology. 67(4):544-546. DOI:10.1212/01.wnl.0000223346.45110.e9
Liu J, et al. (2009). "Ataxin-10 protects against neuronal death induced by mutant huntingtin." J Neurosci Res. 87(5):1235-1246.
Rossi M, et al. (2015). "Ataxin-10: a new player in Alzheimer's disease?" Neurobiol Aging. 36(12):e17-e24.
Liu T, et al. (2018). "Ataxin-10 deficiency reduces plaque pathology in a mouse model of Alzheimer's disease." J Mol Neurosci. 65(3):367-378.
McGough A, et al. (2019). "Armadillo-repeat protein function and evolution." Curr Opin Struct Biol. 59:97-105.
Atxn10 Protein plays an important role in the study of neurodegenerative diseases. This page provides comprehensive information about this topic, including its mechanisms, significance in disease processes, and therapeutic implications.
The study of Atxn10 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.
McGough A, et al. "Armadillo-repeat protein function and evolution." Curr Opin Struct Biol. 2019;59:97-105. PMC. ↩︎
Chen HK, et al. "Ataxin-10 structure and function." J Biol Chem. 2005;280(41):34401-34408. PMC. ↩︎
Liu J, et al. "Ataxin-10 protects against neuronal death."*. 2009;87(5):1235- *J Neurosci Res1246. PMC. ↩︎
Liu T, et al. "Ataxin-10 deficiency reduces plaque pathology." J Mol Neurosci. 2018;65(3):367-378. PMC. ↩︎
Bezprozvanny I. "Calcium signaling and neurodegeneration." Acta Nat. 2009;1(3):36-50. PMC. ↩︎
Hayashi T, et al. "ER-mitochondria contact sites." J Cell Biol. 2009;187(5):661-670. PMC. ↩︎
Rossi M, et al. "Ataxin-10: a new player in Alzheimer's disease?" Neurobiol Aging. 2015;36(12):e17-e24. ↩︎
Van Laar VS, et al. "Mitochondrial dysfunction in Parkinson's disease." Neurobiol Dis. 2020;137:104755. ↩︎
Voronkov M, et al. "PP2A activators and Alzheimer's disease." Future Med Chem. 2013;5(13):1475-1483. ↩︎