Article
Structural insights into the activity of enhancer-binding proteins.
Science (New York, N.Y.) - 25 Mar 2005
Rappas Mathieu, Schumacher Jorg, Beuron Fabienne, Niwa Hajime, Bordes Patricia, Wigneshweraraj Sivaramesh, Keetch Catherine A, Robinson Carol V, Buck Martin, Zhang Xiaodong
Abstract excerpt
Activators of bacterial sigma54-RNA polymerase holoenzyme are mechanochemical proteins that use adenosine triphosphate (ATP) hydrolysis to activate transcription. We have determined by cryogenic electron microscopy (cryo-EM) a 20 angstrom resolution structure of an activator, phage shock protein F [PspF(1-275)], which is bound to an ATP transition state analog in complex with its basal factor, sigma54. By fitting...
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