{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,30]],"date-time":"2026-03-30T20:37:11Z","timestamp":1774903031558,"version":"3.50.1"},"reference-count":64,"publisher":"Oxford University Press (OUP)","issue":"15","license":[{"start":{"date-parts":[[2020,7,18]],"date-time":"2020-07-18T00:00:00Z","timestamp":1595030400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/academic.oup.com\/journals\/pages\/open_access\/funder_policies\/chorus\/standard_publication_model"}],"funder":[{"DOI":"10.13039\/100000002","name":"NIH","doi-asserted-by":"publisher","award":["T32-NS007222-36"],"award-info":[{"award-number":["T32-NS007222-36"]}],"id":[{"id":"10.13039\/100000002","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/100000002","name":"NIH","doi-asserted-by":"publisher","award":["F32-AG059362-01"],"award-info":[{"award-number":["F32-AG059362-01"]}],"id":[{"id":"10.13039\/100000002","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/100000002","name":"NIH","doi-asserted-by":"publisher","award":["1P30AG053760-01"],"award-info":[{"award-number":["1P30AG053760-01"]}],"id":[{"id":"10.13039\/100000002","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/100000002","name":"NIH","doi-asserted-by":"publisher","award":["9R01NS096785-06"],"award-info":[{"award-number":["9R01NS096785-06"]}],"id":[{"id":"10.13039\/100000002","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2020,8,29]]},"abstract":"<jats:title>Abstract<\/jats:title>\n               <jats:p>Divergent protein context helps explain why polyglutamine expansion diseases differ clinically and pathologically. This heterogeneity may also extend to how polyglutamine disease proteins are handled by cellular pathways of proteostasis. Studies suggest, for example, that the ubiquitin-proteasome shuttle protein Ubiquilin-2 (UBQLN2) selectively interacts with specific polyglutamine disease proteins. Here we employ cellular models, primary neurons and mouse models to investigate the potential differential regulation by UBQLN2 of two polyglutamine disease proteins, huntingtin (HTT) and ataxin-3 (ATXN3). In cells, overexpressed UBQLN2 selectively lowered levels of full-length pathogenic HTT but not of HTT exon 1 fragment or full-length ATXN3. Consistent with these results, UBQLN2 specifically reduced accumulation of aggregated mutant HTT but not mutant ATXN3 in mouse models of Huntington\u2019s disease (HD) and spinocerebellar ataxia type 3 (SCA3), respectively. Normally a cytoplasmic protein, UBQLN2 translocated to the nuclei of neurons in HD mice but not in SCA3 mice. Remarkably, instead of reducing the accumulation of nuclear mutant ATXN3, UBQLN2 induced an accumulation of cytoplasmic ATXN3 aggregates in neurons of SCA3 mice. Together these results reveal a selective action of UBQLN2 toward polyglutamine disease proteins, indicating that polyglutamine expansion alone is insufficient to promote UBQLN2-mediated clearance of this class of disease proteins. Additional factors, including nuclear translocation of UBQLN2, may facilitate its action to clear intranuclear, aggregated disease proteins like HTT.<\/jats:p>","DOI":"10.1093\/hmg\/ddaa152","type":"journal-article","created":{"date-parts":[[2020,7,14]],"date-time":"2020-07-14T19:08:03Z","timestamp":1594753683000},"page":"2596-2610","source":"Crossref","is-referenced-by-count":21,"title":["Ubiquilin-2 differentially regulates polyglutamine disease proteins"],"prefix":"10.1093","volume":"29","author":[{"given":"Julia E","family":"Gerson","sequence":"first","affiliation":[{"name":"Department of Neurology, University of Michigan, Ann Arbor, MI 48109-2200, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Nathaniel","family":"Safren","sequence":"additional","affiliation":[{"name":"Department of Neurology, University of Michigan, Ann Arbor, MI 48109-2200, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Svetlana","family":"Fischer","sequence":"additional","affiliation":[{"name":"Department of Neurology, University of Michigan, Ann Arbor, MI 48109-2200, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Ronak","family":"Patel","sequence":"additional","affiliation":[{"name":"Department of Neurology, University of Michigan, Ann Arbor, MI 48109-2200, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Emily V","family":"Crowley","sequence":"additional","affiliation":[{"name":"Department of Neurology, University of Michigan, Ann Arbor, MI 48109-2200, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jacqueline P","family":"Welday","sequence":"additional","affiliation":[{"name":"Department of Neurology, University of Michigan, Ann Arbor, MI 48109-2200, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Alexandra K","family":"Windle","sequence":"additional","affiliation":[{"name":"Department of Neurology, University of Michigan, Ann Arbor, MI 48109-2200, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Sami","family":"Barmada","sequence":"additional","affiliation":[{"name":"Department of Neurology, University of Michigan, Ann Arbor, MI 48109-2200, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Henry L","family":"Paulson","sequence":"additional","affiliation":[{"name":"Department of Neurology, University of Michigan, Ann Arbor, MI 48109-2200, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Lisa M","family":"Sharkey","sequence":"additional","affiliation":[{"name":"Department of Neurology, University of Michigan, Ann Arbor, MI 48109-2200, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"286","published-online":{"date-parts":[[2020,7,18]]},"reference":[{"key":"2020090402223249100_ref1","doi-asserted-by":"crossref","first-page":"149","DOI":"10.1007\/s00401-012-0999-z","article-title":"Ubiquilin immunoreactivity in cytoplasmic and nuclear inclusions in synucleinopathies, polyglutamine diseases and intranuclear inclusion body disease","volume":"124","author":"Mori","year":"2012","journal-title":"Acta Neuropathol."},{"key":"2020090402223249100_ref2","doi-asserted-by":"crossref","first-page":"211","DOI":"10.1038\/nature10353","article-title":"Mutations in UBQLN2 cause dominant X-linked juvenile and adult onset ALS and ALS\/dementia","volume":"477","author":"Deng","year":"2011","journal-title":"Nature"},{"key":"2020090402223249100_ref3","doi-asserted-by":"crossref","first-page":"725","DOI":"10.1038\/ncb845","article-title":"Proteasome subunit Rpn1 binds ubiquitin-like protein domains","volume":"4","author":"Elsasser","year":"2002","journal-title":"Nat. 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