Article
Regulation through the secondary channel--structural framework for ppGpp-DksA synergism during transcription.
Cell - 6 Aug 2004
Perederina Anna, Svetlov Vladimir, Vassylyeva Marina N, Tahirov Tahir H, Yokoyama Shigeyuki, Artsimovitch Irina, Vassylyev Dmitry G
Abstract excerpt
Bacterial transcription is regulated by the alarmone ppGpp, which binds near the catalytic site of RNA polymerase (RNAP) and modulates its activity. We show that the DksA protein is a crucial component of ppGpp-dependent regulation. The 2.0 A resolution structure of Escherichia coli DksA reveals a globular domain and a coiled coil with two highly conserved Asp residues at its tip that is reminiscent of the...
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