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rdf:type |
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lifeskim:mentions |
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pubmed:issue |
1
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pubmed:dateCreated |
2004-9-21
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pubmed:abstractText |
Huntington's disease is a progressive neurodegenerative disorder that is associated with a CAG repeat expansion in the gene encoding huntingtin. We found that a 60-kDa protein was increased in Neuro2a cells expressing the N-terminal portion of huntingtin with expanded polyglutamine. We purified this protein, and, using mass spectrometry, identified it as p62, an ubiquitin-associated domain-containing protein. A specific p62 antibody stained the ubiquitylated polyQ inclusions in expanded polyglutamine-expressing cells, as well as in the brain of the huntingtin exon 1 transgenic mice. Furthermore, the level of p62 protein and mRNA was increased in expanded polyglutamine-expressing cells. We also found that p62 formed aggresome-like inclusions when p62 was increased in normal Neuro2a cells by a proteasome inhibitor. Knock-down of p62 does not affect the formation of aggresomes or polyglutamine inclusions, suggesting that p62 is recruited to the aggresome or inclusions secondary to their formation. These results suggest that p62 may play important roles as a responsive protein to a polyglutamine-induced stress rather than as a cross-linker between ubiquitylated proteins.
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pubmed:language |
eng
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pubmed:journal |
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pubmed:citationSubset |
IM
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pubmed:chemical |
http://linkedlifedata.com/resource/pubmed/chemical/Antineoplastic Agents,
http://linkedlifedata.com/resource/pubmed/chemical/BCL2-associated athanogene 1 protein,
http://linkedlifedata.com/resource/pubmed/chemical/Carrier Proteins,
http://linkedlifedata.com/resource/pubmed/chemical/Cysteine Proteinase Inhibitors,
http://linkedlifedata.com/resource/pubmed/chemical/DAPI,
http://linkedlifedata.com/resource/pubmed/chemical/DNA-Binding Proteins,
http://linkedlifedata.com/resource/pubmed/chemical/Green Fluorescent Proteins,
http://linkedlifedata.com/resource/pubmed/chemical/Gtf2h1 protein, mouse,
http://linkedlifedata.com/resource/pubmed/chemical/Hdh protein, mouse,
http://linkedlifedata.com/resource/pubmed/chemical/Indoles,
http://linkedlifedata.com/resource/pubmed/chemical/Leupeptins,
http://linkedlifedata.com/resource/pubmed/chemical/Nerve Tissue Proteins,
http://linkedlifedata.com/resource/pubmed/chemical/Nocodazole,
http://linkedlifedata.com/resource/pubmed/chemical/Nuclear Proteins,
http://linkedlifedata.com/resource/pubmed/chemical/Peptides,
http://linkedlifedata.com/resource/pubmed/chemical/RNA, Messenger,
http://linkedlifedata.com/resource/pubmed/chemical/Transcription Factors,
http://linkedlifedata.com/resource/pubmed/chemical/Ubiquitin,
http://linkedlifedata.com/resource/pubmed/chemical/benzyloxycarbonylleucyl-leucyl-leuci...,
http://linkedlifedata.com/resource/pubmed/chemical/enhanced green fluorescent protein,
http://linkedlifedata.com/resource/pubmed/chemical/polyglutamine
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pubmed:status |
MEDLINE
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pubmed:month |
Oct
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pubmed:issn |
0022-3042
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pubmed:author |
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pubmed:issnType |
Print
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pubmed:volume |
91
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pubmed:owner |
NLM
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pubmed:authorsComplete |
Y
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pubmed:pagination |
57-68
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pubmed:dateRevised |
2006-11-15
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pubmed:meshHeading |
pubmed-meshheading:15379887-Animals,
pubmed-meshheading:15379887-Antineoplastic Agents,
pubmed-meshheading:15379887-Brain,
pubmed-meshheading:15379887-Carrier Proteins,
pubmed-meshheading:15379887-Cell Count,
pubmed-meshheading:15379887-Cell Fractionation,
pubmed-meshheading:15379887-Cell Line, Tumor,
pubmed-meshheading:15379887-Cell Nucleus,
pubmed-meshheading:15379887-Chromatography, High Pressure Liquid,
pubmed-meshheading:15379887-Cysteine Proteinase Inhibitors,
pubmed-meshheading:15379887-DNA-Binding Proteins,
pubmed-meshheading:15379887-Drug Interactions,
pubmed-meshheading:15379887-Exons,
pubmed-meshheading:15379887-Fluorescent Antibody Technique,
pubmed-meshheading:15379887-Gene Expression Regulation,
pubmed-meshheading:15379887-Green Fluorescent Proteins,
pubmed-meshheading:15379887-Immunoblotting,
pubmed-meshheading:15379887-Immunoprecipitation,
pubmed-meshheading:15379887-Inclusion Bodies,
pubmed-meshheading:15379887-Indoles,
pubmed-meshheading:15379887-Leupeptins,
pubmed-meshheading:15379887-Male,
pubmed-meshheading:15379887-Mass Spectrometry,
pubmed-meshheading:15379887-Mice,
pubmed-meshheading:15379887-Mice, Knockout,
pubmed-meshheading:15379887-Nerve Tissue Proteins,
pubmed-meshheading:15379887-Neuroblastoma,
pubmed-meshheading:15379887-Neurons,
pubmed-meshheading:15379887-Nocodazole,
pubmed-meshheading:15379887-Nuclear Proteins,
pubmed-meshheading:15379887-Peptides,
pubmed-meshheading:15379887-RNA, Messenger,
pubmed-meshheading:15379887-RNA Interference,
pubmed-meshheading:15379887-Reverse Transcriptase Polymerase Chain Reaction,
pubmed-meshheading:15379887-Sequence Analysis, Protein,
pubmed-meshheading:15379887-Time Factors,
pubmed-meshheading:15379887-Transcription Factors,
pubmed-meshheading:15379887-Transfection,
pubmed-meshheading:15379887-Ubiquitin
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pubmed:year |
2004
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pubmed:articleTitle |
Increased expression of p62 in expanded polyglutamine-expressing cells and its association with polyglutamine inclusions.
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pubmed:affiliation |
Laboratory for Structural Neuropathology, RIKEN Brain Science Institute, Wako-shi, Saitama, Japan.
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pubmed:publicationType |
Journal Article,
Comparative Study,
Research Support, Non-U.S. Gov't
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