Abstract:
:Heme oxygenase-1, an essential enzyme in heme catabolism, and metallothionein IIA, a small metal-binding protein with clusters of cysteins, are remarkably induced in HeLa cells following the treatment with cadmium or zinc. Both proteins are considered to be involved in the defense system against metal toxicity. Here we showed by transient expression assays that the cadmium-responsive element (CdRE) of the human heme oxygenase-1 gene is not responsive to zinc, whereas a metal-regulatory element (MRE) of the human metallothionein IIA gene is able to respond to either cadmium or zinc. The CdRE is recognized by a certain nuclear protein(s) which is however unable to bind to an MRE of the metallothionein IIA gene. These results suggest that the metal-selective activation of each gene promoter is mediated by a separate mechanism.
journal_name
Biochem Biophys Res Communjournal_title
Biochemical and biophysical research communicationsauthors
Takeda K,Fujita H,Shibahara Sdoi
10.1006/bbrc.1995.1167subject
Has Abstractpub_date
1995-02-06 00:00:00pages
160-7issue
1eissn
0006-291Xissn
1090-2104pii
S0006-291X(85)71167-9journal_volume
207pub_type
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journal_title:Biochemical and biophysical research communications
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journal_title:Biochemical and biophysical research communications
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journal_title:Biochemical and biophysical research communications
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journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章
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更新日期:1994-02-15 00:00:00
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journal_title:Biochemical and biophysical research communications
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journal_title:Biochemical and biophysical research communications
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journal_title:Biochemical and biophysical research communications
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journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章
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journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章
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journal_title:Biochemical and biophysical research communications
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更新日期:2010-07-23 00:00:00