Function
Deubiquitinating enzyme involved in protein homeostasis maintenance, transcription, cytoskeleton regulation, myogenesis and degradation of misfolded chaperone substrates. Binds long polyubiquitin chains and trims them, while it has weak or no activity against chains of 4 or less ubiquitins. Involved in degradation of misfolded chaperone substrates via its interaction with STUB1/CHIP: recruited to monoubiquitinated STUB1/CHIP, and restricts the length of ubiquitin chain attached to STUB1/CHIP substrates and preventing further chain extension.
Biological Context
Subcellular Location: Nucleus matrix; Nucleus; Lysosome membrane (Peripheral membrane protein)
Tissue Specificity: Ubiquitous
Disease Association: Spinocerebellar ataxia 3 (SCA3) : Spinocerebellar ataxia is a clinically and genetically heterogeneous group of cerebellar disorders. Patients show progressive incoordination of gait and often poor coordination of hands, speech and eye movements, due to cerebellum degeneration with variable involvement of the brainstem and spinal cord. SCA3 belongs to the autosomal dominant cerebellar ataxias type I (ADCA I) which are characterized by cerebellar ataxia in combination with additional clinical features like optic atrophy, ophthalmoplegia, bulbar and extrapyramidal signs, peripheral neuropathy and dementia. The molecular defect in SCA3 is the a CAG repeat expansion in ATX3 coding region. Longer expansions result in earlier onset and more severe clinical manifestations of the disease. [The disease is caused by variants affecting the gene represented in this entry]
Product Specifications
Recombinant Human Ataxin-3 (ATXN3) is a recombinant protein from Homo sapiens (Human), expressed in E.coli, covering amino acids 1-364aa, with C-terminal 6xHis-tagged tag, molecular weight 48.7kDa, purity Greater than 95% as determined by SDS-PAGE.. Suitable for ELISA and Western Blot applications.
