Linked Life Data

9285564

Source:http://linkedlifedata.com/resource/pubmed/id/9285564

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
9
pubmed:dateCreated
1997-9-22
pubmed:abstractText
Exogenously introduced wild-type and mutant p53 have recently been reported to enhance the human epidermal growth factor receptor (EGF-R) gene promoter activity in p53-deficient Saos2 osteosarcoma cells. A p53 binding site residing at position -265/-239 in the EGF-R proximal promoter has also been identified. We investigated the p53 regulation of EGF-R core promoter activity in human cell lines with varying endogenour p53 status. Wild-type and mutant p53Ala143 enhanced the EGF-R core promotor activity in cells that were either p53-deficient or contained wild-type or mutant endogenous p53. Upon further characterization of the various deletion fragments of the EGF-R promoter, we identified a wild-type p53 responsive 62 bp region residing at position -167/-105. The -167/-105 segment was responsive only to wild-type p53 but not to mutant p53Ala143 or p53His273. The -167/-105 segment of the EGF-R promotor contains one perfect and several imperfect consensus p53-binding half sites; indeed in gel shift experiments the 62 bp -167/-105 segment as well as the oligonucleotides corresponding to two p53 consensus half-sites within the 62 bp fragment, exhibited binding to p53-containing protein complexes. Thus, we have identified an additional wild-type p53 responsive site in the human EGF-R promoter. This site containing consensus p53-binding sequences resides at position -167/-105 and is proximal to recently identified p53 binding element located at position -265/-239 in the EGF-R promotor.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Aug
pubmed:issn
0950-9232
pubmed:author
pubmed:issnType
Print
pubmed:day
28
pubmed:volume
15
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
1095-101
pubmed:dateRevised
2009-11-19
pubmed:meshHeading
pubmed:year
1997
pubmed:articleTitle
Identification of an additional p53-responsive site in the human epidermal growth factor receptor gene promotor.
pubmed:affiliation
Laboratory of Molecular Pharmacology, National Cancer Institute, Bethesda, Maryland 20892, USA.
pubmed:publicationType
Journal Article