Spacing requirements for transcription activation by Escherichia coli FNR protein
Spacing requirements for transcription activation by Escherichia coli FNR protein
复制标题
大肠杆菌 FNR 蛋白转录激活的间距要求
作者:
H. Wing;S. Williams;S. Busby
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.
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
影响因子:
5.6
作者:
Zhou,Y;Merkel,TJ;Ebright,RH
通讯作者:
Ebright,RH
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