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25 April 2024
 
  » pubmed » pmid10741971

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Single-molecule study of transcriptional pausing and arrest by E. coli RNA polymerase
R J Davenport ; G J Wuite ; R Landick ; C Bustamante ;
Date 31 Mar 2000
Journal Science, 287 (5462), 2497-500
AbstractUsing an optical-trap/flow-control video microscopy technique, we followed transcription by single molecules of Escherichia coli RNA polymerase in real time over long template distances. These studies reveal that RNA polymerase molecules possess different intrinsic transcription rates and different propensities to pause and stop. The data also show that reversible pausing is a kinetic intermediate between normal elongation and the arrested state. The conformational metastability of RNA polymerase revealed by this single-molecule study of transcription has direct implications for the mechanisms of gene regulation in both bacteria and eukaryotes.
Source PubMed, pmid10741971 doi: 8409
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