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- Publisher Website: 10.1074/jbc.M116.763599
- Scopus: eid_2-s2.0-85017396328
- PMID: 28246169
- WOS: WOS:000398813200016
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Article: Expanded polyalanine tracts function as nuclear export signals and promote protein mislocalization via eEF1A1 factor
Title | Expanded polyalanine tracts function as nuclear export signals and promote protein mislocalization via eEF1A1 factor |
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Authors | |
Issue Date | 2017 |
Citation | Journal of Biological Chemistry, 2017, v. 292, n. 14, p. 5784-5800 How to Cite? |
Abstract | Polyalanine (poly(A)) diseases are caused by the expansion of translated GCN triplet nucleotide sequences encoding poly(A) tracts in proteins. To date, nine human disorders have been found to be associated with poly(A) tract expansions, including congenital central hypoventilation syndrome and oculopharyngeal muscular dystrophy. Previous studies have demonstrated that unexpanded wild-type poly(A)-containing proteins localize to the cell nucleus, whereas expanded poly(A)-containing proteins primarily localize to the cytoplasm. Because most of these poly(A) disease proteins are transcription factors, this mislocalization causes cellular transcriptional dysregulation leading to cellular dysfunction. Correcting this faulty localization could potentially point to strategies to treat the aforementioned disorders, so there is a pressing need to identify the mechanisms underlying the mislocalization of expanded poly(A) protein. Here, we performed a glutathione S-transferase pulldown assay followed by mass spectrometry and identified eukaryotic translation elongation factor 1α1 (eEF1A1) as an interacting partner with expanded poly(A)-containing proteins. Strikingly, knockdown of eEF1A1 expression partially corrected the mislocalization of the expanded poly(A) proteins in the cytoplasm and restored their functions in the nucleus. We further demonstrated that the expanded poly(A) domain itself can serve as a nuclear export signal. Taken together, this study demonstrates that eEF1A1 regulates the subcellular location of expanded poly(A) proteins and is therefore a potential therapeutic target for combating the pathogenesis of poly(A) diseases. |
Persistent Identifier | http://hdl.handle.net/10722/307207 |
ISSN | 2020 Impact Factor: 5.157 2023 SCImago Journal Rankings: 1.766 |
PubMed Central ID | |
ISI Accession Number ID |
DC Field | Value | Language |
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dc.contributor.author | Li, Li | - |
dc.contributor.author | Ng, Nelson Ka Lam | - |
dc.contributor.author | Koon, Alex Chun | - |
dc.contributor.author | Chan, Ho Yin Edwin | - |
dc.date.accessioned | 2021-11-03T06:22:09Z | - |
dc.date.available | 2021-11-03T06:22:09Z | - |
dc.date.issued | 2017 | - |
dc.identifier.citation | Journal of Biological Chemistry, 2017, v. 292, n. 14, p. 5784-5800 | - |
dc.identifier.issn | 0021-9258 | - |
dc.identifier.uri | http://hdl.handle.net/10722/307207 | - |
dc.description.abstract | Polyalanine (poly(A)) diseases are caused by the expansion of translated GCN triplet nucleotide sequences encoding poly(A) tracts in proteins. To date, nine human disorders have been found to be associated with poly(A) tract expansions, including congenital central hypoventilation syndrome and oculopharyngeal muscular dystrophy. Previous studies have demonstrated that unexpanded wild-type poly(A)-containing proteins localize to the cell nucleus, whereas expanded poly(A)-containing proteins primarily localize to the cytoplasm. Because most of these poly(A) disease proteins are transcription factors, this mislocalization causes cellular transcriptional dysregulation leading to cellular dysfunction. Correcting this faulty localization could potentially point to strategies to treat the aforementioned disorders, so there is a pressing need to identify the mechanisms underlying the mislocalization of expanded poly(A) protein. Here, we performed a glutathione S-transferase pulldown assay followed by mass spectrometry and identified eukaryotic translation elongation factor 1α1 (eEF1A1) as an interacting partner with expanded poly(A)-containing proteins. Strikingly, knockdown of eEF1A1 expression partially corrected the mislocalization of the expanded poly(A) proteins in the cytoplasm and restored their functions in the nucleus. We further demonstrated that the expanded poly(A) domain itself can serve as a nuclear export signal. Taken together, this study demonstrates that eEF1A1 regulates the subcellular location of expanded poly(A) proteins and is therefore a potential therapeutic target for combating the pathogenesis of poly(A) diseases. | - |
dc.language | eng | - |
dc.relation.ispartof | Journal of Biological Chemistry | - |
dc.rights | This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License. | - |
dc.title | Expanded polyalanine tracts function as nuclear export signals and promote protein mislocalization via eEF1A1 factor | - |
dc.type | Article | - |
dc.description.nature | published_or_final_version | - |
dc.identifier.doi | 10.1074/jbc.M116.763599 | - |
dc.identifier.pmid | 28246169 | - |
dc.identifier.pmcid | PMC5392573 | - |
dc.identifier.scopus | eid_2-s2.0-85017396328 | - |
dc.identifier.volume | 292 | - |
dc.identifier.issue | 14 | - |
dc.identifier.spage | 5784 | - |
dc.identifier.epage | 5800 | - |
dc.identifier.eissn | 1083-351X | - |
dc.identifier.isi | WOS:000398813200016 | - |