Linked Life Data

11297531

Source:http://linkedlifedata.com/resource/pubmed/id/11297531

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
18
pubmed:dateCreated
2001-4-30
pubmed:abstractText
Mouse temperature-sensitive p53(Val-135) accumulates in the nucleus and acts as a "wild-type" at 32 degrees C while it is sequestered in the cytoplasm at 37 degrees C. The cytoplasmic p53(Val-135) relocalized into the nucleus upon inhibition of the nuclear export at 37 degrees C, whereas a mutation in a major bipartite nuclear localization signal (NLS) caused constitutive cytoplasmic localization, indicating that it shuttled between the cytoplasm and the nucleus by its own nuclear export signal and NLS rather than tethered to cytoplasmic structures. Although the full-length p53(Val-135) did not bind the import receptor at 37 degrees C, a C-terminally truncated p53(Val-135) lacking residues 326-390 did bind it. Molecular chaperones such as Hsc70 were associated with p53(Val-135) at 37 degrees C but not at 32 degrees C. When the nuclear export was blocked by leptomycin B, only a fraction lacking Hsc70 was specifically accumulated in the nucleus. Immunodepletion of Hsc70 from the reticulocyte lysate caused p53(Val-135) to bind the import receptor. This binding was blocked by supplying the cell extract containing Hsc70 but not by the addition of recombinant Hsc70 alone. We suggest that the association with the Hsc70-containing complex prevents the NLS from the access of the import receptor through the C-terminal region of p53(Val-135) at 37 degrees C, whereas its dissociation at 32 degrees C allows rapid nuclear import.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
May
pubmed:issn
0021-9258
pubmed:author
pubmed:issnType
Print
pubmed:day
4
pubmed:volume
276
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
14649-57
pubmed:dateRevised
2008-11-21
pubmed:meshHeading
pubmed:year
2001
pubmed:articleTitle
A role for Hsc70 in regulating nucleocytoplasmic transport of a temperature-sensitive p53 (p53Val-135).
pubmed:affiliation
Department of Biotechnology, Graduate School of Agriculture and Life Sciences, the University of Tokyo, Bunkyo-ku, Tokyo 113-8657, Japan.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't