Structural basis of transcriptional pausing in bacteria.
Structural basis of transcriptional pausing in bacteria.
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DOI:
10.1016/j.cell.2012.12.020
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发表时间:
2013-01-31
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:
Weixlbaumer A;Leon K;Landick R;Darst SA
Transcriptional pausing by multi-subunit RNA Polymerases (RNAPs) is a key mechanism for regulating gene expression in both prokaryotes and eukaryotes, and is a prerequisite for transcription termination. Pausing and termination states are thought to arise through a common, elemental pause state that is inhibitory for nucleotide addition. We report three crystal structures of Thermus RNAP elemental paused elongation complexes (ePECs). The structures reveal the same relaxed, open-clamp RNAP conformation in the ePEC that may arise by failure to reestablish DNA contacts during translocation. A kinked bridge-helix sterically blocks the RNAP active site, explaining how this conformation inhibits RNAP catalytic activity. Our results provide a framework for understanding how RNA hairpin formation stabilizes the paused state and how the ePEC intermediate facilitates termination.
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影响因子:
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通讯作者:
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影响因子:
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作者:
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Landick, R
DOI:
10.1073/pnas.1013828108
发表时间:
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DOI:
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发表时间:
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期刊:
Acta crystallographica. Section D, Biological crystallography
影响因子:
--
作者:
Adams PD;Afonine PV;Bunkóczi G;Chen VB;Davis IW;Echols N;Headd JJ;Hung LW;Kapral GJ;Grosse-Kunstleve RW;McCoy AJ;Moriarty NW;Oeffner R;Read RJ;Richardson DC;Richardson JS;Terwilliger TC;Zwart PH
通讯作者:
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