Biology:Ataxin 7
| ataxin 7 | |
|---|---|
| Identifiers | |
| Symbol | ATXN7 |
| Alt. symbols | SCA7 |
| NCBI gene | 6314 |
| HGNC | 10560 |
| OMIM | 607640 |
| RefSeq | NM_000333 |
| UniProt | O15265 |
| Other data | |
| Locus | Chr. 3 p21.1-p12 |
Ataxin 7 (ATXN7) is a protein of the SCA7 gene, which contains 892 amino acids with an expandable poly(Q) region close to the N-terminus. The expandable poly(Q) motif region in the protein contributes crucially to spinocerebellar ataxia (SCA) pathogenesis by the induction of intranuclear inclusion bodies.[1] ATXN7 is associated with both olivopontocerebellar atrophy type 3 (OPCA3) and spinocerebellar ataxia type 7 (SCA7).
CAG repeat leads to pathological protein misfolding. In ataxin-7 gene has shown to cause cerebellar and brainstem degeneration as well as retinal conerod dystrophy. Polyglutamine (polyQ) expansion at the N-terminus of ataxin-7 causes protein aggregation, leading to the symptoms of ataxia with visual loss.[2]
Research suggest that silencing of ataxin-7 in the retina by RNAi can be a possible therapeutic strategy for patients with SCA7 retinal degeneration.[3]
References
- ↑ "Elucidation of ataxin-3 and ataxin-7 function by integrative bioinformatics". Human Molecular Genetics 12 (21): 2845–2852. November 2003. doi:10.1093/hmg/ddg297. PMID 12944423.
- ↑ Wolfe, Michael S. (18 April 2018). The molecular and cellular basis of neurodegenerative diseases: underlying mechanisms. ISBN 978-0-12-811304-2. OCLC 1040033113.
- ↑ "RNA interference-based therapy for spinocerebellar ataxia type 7 retinal degeneration". PLOS ONE 9 (4): e95362. 2014. doi:10.1371/journal.pone.0095362. PMID 24759684. Bibcode: 2014PLoSO...995362R.
Further reading
- "PML clastosomes prevent nuclear accumulation of mutant ataxin-7 and other polyglutamine proteins". The Journal of Cell Biology 174 (1): 65–76. July 2006. doi:10.1083/jcb.200511045. PMID 16818720.
- "Both normal and polyglutamine- expanded ataxin-7 are components of TFTC-type GCN5 histone acetyltransferase- containing complexes". Biochemical Society Symposium 73 (73): 155–163. 2006. doi:10.1042/bss0730155. PMID 16626296.
- "Polyglutamine-expanded ataxin-7 activates mitochondrial apoptotic pathway of cerebellar neurons by upregulating Bax and downregulating Bcl-x(L)". Cellular Signalling 18 (4): 541–552. April 2006. doi:10.1016/j.cellsig.2005.05.024. PMID 15964171.
- "Ataxin-7 aggregation and ubiquitination in infantile SCA7 with 180 CAG repeats". Annals of Neurology 56 (3): 448–452. September 2004. doi:10.1002/ana.20230. PMID 15349877.
- "Ataxin-7 is a subunit of GCN5 histone acetyltransferase-containing complexes". Human Molecular Genetics 13 (12): 1257–1265. June 2004. doi:10.1093/hmg/ddh139. PMID 15115762.
External links
- GeneReviews/NCBI/NIH/UW entry on Spinocerebellar Ataxia Type 7
- ataxin-7 at the US National Library of Medicine Medical Subject Headings (MeSH)
- Online Mendelian Inheritance in Man (OMIM) 164500
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