Spacing requirements for transcription activation by Escherichia coli FNR protein

Spacing requirements for transcription activation by Escherichia coli FNR protein
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大肠杆菌 FNR 蛋白转录激活的间距要求

DOI:
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发表时间:
1995
影响因子:
3.2
通讯作者:
S. Busby
S. Busby
中科院分区:
生物学3区
文献类型:
--
作者:
H. Wing;S. Williams;S. Busby

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我们在大肠杆菌MERR启动子上游的不同位置克隆了大肠杆菌FNR蛋白的一个共有的DNA位点。当FNR结合位点位于转录起始上游的41、61、71、82和92bp附近时,FNR可以激活MERR启动子的转录启动。FNR中的SF73阳性对照氨基酸替换干扰了FNR的转录激活。相反,GA85阳性对照替换仅降低了启动子的激活,其中FNR结合位点位于转录本起始上游41bp。SF73的替换似乎识别了FNR的一个活化区,该活化区对于不同结构的启动子的转录激活是重要的。对定向异源二聚体的实验表明,这个激活区在FNR二聚体的上游亚基和下游的亚基中起作用,其中FNR在启动子上与转录起始约41bp结合,在启动子的下游亚基中FNR在上游更远的地方结合。
We cloned a consensus DNA site for the Escherichia coli FNR protein at different locations upstream of the E. coli melR promoter. FNR can activate transcription initiation at the melR promoter when the FNR binding site is centered around 41, 61, 71, 82, and 92 bp upstream from the transcription start. The SF73 positive control amino acid substitution in FNR interfered with transcription activation by FNR in each case. In contrast, the GA85 positive control substitution reduced activation only at the promoter, where the FNR binding site is 41 bp upstream of the transcript start. The SF73 substitution appears to identify an activating region of FNR that is important for transcription activation at promoters that differ in architecture. Experiments with oriented heterodimers showed that this activating region is functional in the upstream subunit of the FNR dimer at the promoter where FNR binds around 41 bp from the transcript start and in the downstream subunit at the promoters where FNR binds farther upstream.
将大肠杆菌 lac 启动子 DNA 位点内的 2 个碱基对(每个 DNA 半位点 1 个碱基对)替换为分解代谢基因激活蛋白,将 lac 启动子置于 FNR 调节子中。
DOI: --
发表时间: 1990
期刊: The Journal of biological chemistry
影响因子: --
作者:
Zhang,XP;Ebright,RH
通讯作者: Ebright,RH
DOI: 10.1016/0022-2836(94)90035-3
发表时间: 1994
影响因子: 5.6
作者:
Zhou,Y;Merkel,TJ;Ebright,RH
通讯作者: Ebright,RH
二聚体转录激活蛋白的功能亚基取决于启动子结构。
DOI: 10.1002/j.1460-2075.1994.tb06776.x
发表时间: 1994
期刊: The EMBO journal
影响因子: --
作者:
Zhou,Y;Pendergrast,PS;Bell,A;Williams,R;Busby,S;Ebright,RH
通讯作者: Ebright,RH