Binding of the Transcription Factor Interferon Regulatory Factor-1 to the Inducible Nitric-oxide Synthase Promoter*
Binding of the Transcription Factor Interferon Regulatory Factor-1 to the Inducible Nitric-oxide Synthase Promoter*
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转录因子干扰素调节因子 1 与诱导型一氧化氮合酶启动子的结合*
DOI:
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发表时间:
1997
影响因子:
4.8
通讯作者:
T. Evans
中科院分区:
文献类型:
--
作者:
J. Spink;T. Evans
Nitric oxide production in a variety of inflammatory conditions is dependent on the synthesis of the enzyme, inducible nitric-oxide synthase (iNOS). The gene for this enzyme is regulated by a number of inflammatory cytokines, including interferon-γ. Transcriptional activation of the gene is dependent on the interferon-γ-induced transcription factor, interferon regulatory factor-1 (IRF-1). Using a 99-base pair segment of the iNOS gene promoter encompassing nucleotides −979 to −881, a region essential for gene activation by cytokines, we show that with increasing concentrations of added IRF-1, a monomeric then a dimeric complex form. Molecular footprinting analysis shows that the factor binds initially to a canonical IRF-1 site as a monomer. The region of binding is then extended both in a 5′ and 3′ direction on formation of the dimeric complex, with additional contacts in the minor groove of DNA. Binding of the second molecule of IRF-1 is dependent on the presence of the initial bound protein. Sequential binding of IRF-1 to form a dimeric complex has not been described previously, and we show that formation of this dimeric complex is essential for full activation of the iNOS gene by cytokines in vascular smooth muscle cells.
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影响因子:
5.3
作者:
JOHNSON, DR;POBER, JS
通讯作者:
POBER, JS
DOI:
10.1016/s0021-9258(17)36703-0
发表时间:
1994-05
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
C. Nathan;Q. Xie
通讯作者:
C. Nathan;Q. Xie
DOI:
10.1073/pnas.86.24.9936
发表时间:
1989-12-01
影响因子:
11.1
作者:
FUJITA, T;REIS, LFL;VILCEK, J
通讯作者:
VILCEK, J
影响因子:
14.9
作者:
F. Vallette;Emmanuelle Mege;A. Reiss;M. Adesnik
通讯作者:
F. Vallette;Emmanuelle Mege;A. Reiss;M. Adesnik
影响因子:
56.9
作者:
KAMIJO, R;HARADA, H;VILCEK, J
通讯作者:
VILCEK, J