ArticleThe Journal of biological chemistry2022
The molecular basis of spinocerebellar ataxia type 48 caused by a de novo mutation in the ubiquitin ligase CHIP.
Article in The Journal of biological chemistry, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 6 papers.
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6 citing papers in PubMed, 11 citations in OpenAlex.
- Domain-dependent uncoupling of the co-chaperone and E3 ubiquitin ligase CHIP underlies heterogeneity in spinocerebellar ataxia 48.The Journal of biological chemistry · 2026Article
- Crystal structures reveal phosphorylation-dependent disruption of the heat shock protein 70-CHIP interface: A compensatory G132N variant restores binding affinity.Cell stress & chaperones · 2026Article
- A novel STUB1 p.(Gln118*) nonsense variant in compound heterozygosity causes autosomal recessive spinocerebellar ataxia type 16 in a Chinese patient.BMC neurology · 2026Article
- Clinical and functional characterization of a novel STUB1 mutation in a Chinese spinocerebellar ataxia 48 pedigree.Orphanet journal of rare diseases · 2024Article
- Case Series of Cerebellar Ataxia with Tremor Due to Heterozygous STUB1 Variants (SCA48) without TBP Expansions: Further Evidence for SCA48 as a Monogenic Disease.Cerebellum (London, England) · 2024Article
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17 authors at 5 institutions in 1 country.
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Abstract
The spinocerebellar ataxias (SCAs) are a class of incurable diseases characterized by degeneration of the cerebellum that results in movement disorder. Recently, a new heritable form of SCA, spinocerebellar ataxia type 48 (SCA48), was attributed to dominant mutations in STIP1 homology and U box-containing 1 (STUB1); however, little is known about how these mutations cause SCA48. STUB1 encodes for the protein C terminus of Hsc70 interacting protein (CHIP), an E3 ubiquitin ligase. CHIP is known to regulate proteostasis by recruiting chaperones via a N-terminal tetratricopeptide repeat domain and recruiting E2 ubiquitin-conjugating enzymes via a C-terminal U-box domain. These interactions allow CHIP to mediate the ubiquitination of chaperone-bound, misfolded proteins to promote their degradation via the proteasome. Here we have identified a novel, de novo mutation in STUB1 in a patient with SCA48 encoding for an A52G point mutation in the tetratricopeptide repeat domain of CHIP. Utilizing an array of biophysical, biochemical, and cellular assays, we demonstrate that the CHIP
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