Interaction of T4 AsiA with its target sites in the RNA polymerase sigma70 subunit leads to distinct and opposite effects on transcription.
Interaction of T4 AsiA with its target sites in the RNA polymerase sigma70 subunit leads to distinct and opposite effects on transcription.
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T4 AsiA 与其 RNA 聚合酶 sigma70 亚基中的靶位点相互作用,会对转录产生不同且相反的影响。
DOI:
10.1016/s0022-2836(02)01442-0
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发表时间:
2003
影响因子:
5.6
通讯作者:
Severinov,Konstantin
中科院分区:
文献类型:
--
作者:
Minakhin,Leonid;Niedziela-Majka,Anita;Kuznedelov,Konstantin;Adelman,Karen;Urbauer,JeffreyL;Heyduk,Tomasz;Severinov,Konstantin
Bacteriophage T4 AsiA is a homodimeric protein that orchestrates a switch from the host and early viral transcription to middle viral transcription by binding to the σ70subunit of Escherichia coli RNA polymerase holoenzyme (Eσ70) and preventing promoter complex formation on most E.coli and early T4 promoters. In addition, Eσ70AsiA, but not Eσ70, is a substrate of transcription activation by T4-encoded DNA-binding protein MotA, a co-activator of transcription from middle viral promoters. The molecular determinants of σ70–AsiA interaction necessary for transcription inhibition reside in the σ70conserved region 4.2, which recognizes the −35 promoter consensus element. The molecular determinants of σ70–AsiA interaction necessary for MotA-dependent transcription activation have not been identified. Here, we show that in the absence of σ70region 4.2, AsiA interacts with σ70conserved region 4.1 and activates transcription in a MotA-independent manner. Further, we show that the AsiA dimer must dissociate to interact with either region 4.2 or region 4.1 of σ70. We propose that MotA may co-activate transcription by restricting AsiA binding to σ70region 4.1.
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DOI:
10.1006/jmbi.1998.1742
发表时间:
1998
期刊:
Journal of molecular biology.
影响因子:
--
作者:
Severinova,E;Severinov,K;Darst,SA
通讯作者:
Darst,SA
影响因子:
3.6
作者:
Colland, F;Orsini, G;Kolb, A
通讯作者:
Kolb, A
DOI:
10.1074/jbc.m106400200
发表时间:
2001-11
期刊:
The Journal of Biological Chemistry
影响因子:
--
作者:
J. Urbauer;K. Adelman;R. Urbauer;M. Simeonov;J. Gilmore;M. Żółkiewski;E. Brody
通讯作者:
J. Urbauer;K. Adelman;R. Urbauer;M. Simeonov;J. Gilmore;M. Żółkiewski;E. Brody
影响因子:
3.2
作者:
Gerber, JS;Hinton, DM
通讯作者:
Hinton, DM
影响因子:
5.6
作者:
L. Minakhin;Julio A. Camarero;M. Holford;Christian N. Parker;Tom W. Muir;K. Severinov
通讯作者:
K. Severinov