Abstract:
:The epidermal growth factor (EGF) receptor is the functional target of the mitogen EGF and the cellular homolog of the avian erythroblastosis virus erbB oncogene product. Regulation of expression of the proto-oncogene encoding the EGF receptor can be elucidated by studying the structure and function of the gene promoter outside the confines of the cell. Previously, we reported the isolation of the human EGF receptor gene promoter. The promoter is highly GC rich, contains no TATA or CAAT box, and has multiple transcription start sites. An S1 nuclease-sensitive site has now been found 80 to 110 base pairs (bp) upstream from the major in vivo transcription initiation site. Two sets of direct repeat sequences were found in this area; both conform to the motif TCCTCCTCC. When deletion mutations were made in this region of the promoter by using either Bal 31 exonuclease or S1 nuclease, we found that in vivo activity dropped three- to fivefold, on the basis of transient-transfection analysis. Examination of nuclear protein binding to normal and mutated promoter DNAs by gel retardation analysis and DNase I footprinting revealed that two specific factors bind to the direct repeat region but cannot bind to the S1 nuclease-mutated promoter. One of the specific factors is the transcription factor Sp1. The results suggest that these nuclear trans-acting factors interact with the S1 nuclease-sensitive region of the EGF receptor gene promoter and either directly or indirectly stimulate transcription.
journal_name
Mol Cell Bioljournal_title
Molecular and cellular biologyauthors
Johnson AC,Jinno Y,Merlino GTdoi
10.1128/mcb.8.10.4174subject
Has Abstractpub_date
1988-10-01 00:00:00pages
4174-84issue
10eissn
0270-7306issn
1098-5549journal_volume
8pub_type
杂志文章abstract::The function of the p53 tumor suppressor to inhibit proliferation or initiate apoptosis is often abrogated in tumor cells. Mdm2 and its homolog, Mdm4, are critical inhibitors of p53 that are often overexpressed in human tumors. In mice, loss of Mdm2 or Mdm4 leads to embryonic lethal phenotypes that are completely resc...
journal_title:Molecular and cellular biology
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pub_type: 杂志文章
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journal_title:Molecular and cellular biology
pub_type: 杂志文章
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journal_title:Molecular and cellular biology
pub_type: 杂志文章
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pub_type: 杂志文章
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pub_type: 杂志文章
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pub_type: 杂志文章
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pub_type: 杂志文章
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pub_type: 杂志文章
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更新日期:1989-10-01 00:00:00
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pub_type: 杂志文章
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pub_type: 杂志文章
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更新日期:2005-12-01 00:00:00
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pub_type: 杂志文章
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更新日期:1983-06-01 00:00:00
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pub_type: 杂志文章
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pub_type: 杂志文章
doi:10.1128/mcb.11.3.1248
更新日期:1991-03-01 00:00:00
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journal_title:Molecular and cellular biology
pub_type: 杂志文章
doi:10.1128/mcb.18.7.3956
更新日期:1998-07-01 00:00:00
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journal_title:Molecular and cellular biology
pub_type: 杂志文章
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journal_title:Molecular and cellular biology
pub_type: 杂志文章
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更新日期:1982-03-01 00:00:00
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journal_title:Molecular and cellular biology
pub_type: 杂志文章
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journal_title:Molecular and cellular biology
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journal_title:Molecular and cellular biology
pub_type: 杂志文章
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journal_title:Molecular and cellular biology
pub_type: 杂志文章
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pub_type: 杂志文章
doi:10.1128/MCB.25.3.907-920.2005
更新日期:2005-02-01 00:00:00
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pub_type: 杂志文章
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journal_title:Molecular and cellular biology
pub_type: 杂志文章
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journal_title:Molecular and cellular biology
pub_type: 杂志文章
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journal_title:Molecular and cellular biology
pub_type: 杂志文章
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更新日期:2005-12-01 00:00:00
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pub_type: 杂志文章
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更新日期:2004-04-01 00:00:00
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journal_title:Molecular and cellular biology
pub_type: 杂志文章
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更新日期:1998-04-01 00:00:00