Structural basis for promoter-10 element recognition by the bacterial RNA polymerase σ subunit.
Structural basis for promoter-10 element recognition by the bacterial RNA polymerase σ subunit.
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DOI:
10.1016/j.cell.2011.10.041
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发表时间:
2011-12-09
期刊:
影响因子:
64.5
通讯作者:
Darst SA
中科院分区:
文献类型:
--
作者:
Feklistov A;Darst SA
The key step in bacterial promoter opening is recognition of the -10 promoter element (T-12A-11T-10A-9A-8T-7 consensus sequence) by the RNA polymerase σ subunit. We determined crystal structures of σ domain 2 bound to single-stranded DNA bearing -10 element sequences. Extensive interactions occur between the protein and the DNA backbone of every -10 element nucleotide. Base-specific interactions occur primarily with A-11, and T-7, which are flipped out of the single-stranded DNA base-stack and buried deep in protein pockets. The structures, along with biochemical data, support a model where the recognition of the -10 element sequence drives initial promoter opening as the bases of the non-template strand are extruded from the DNA double-helix and captured by σ. These results provide a detailed structural basis for the critical roles of A-11 and T-7 in promoter melting, and reveal important insights into the initiation of transcription bubble formation.
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影响因子:
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作者:
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通讯作者:
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影响因子:
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作者:
Feklistov, Andrey;Barinova, Nataliya;Kulbachinskiy, Andrey
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Darst, SA
DOI:
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发表时间:
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影响因子:
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