Abstract:
:Despite extensive studies on transcription mechanisms, it is unknown how termination complexes are disassembled, especially in what order the essential components dissociate. Our single-molecule fluorescence study unveils that RNA transcript release precedes RNA polymerase (RNAP) dissociation from the DNA template much more often than their concurrent dissociations in intrinsic termination of bacterial transcription. As termination is defined by the release of product RNA from the transcription complex, the subsequent retention of RNAP on DNA constitutes a previously unidentified stage, termed here as recycling. During the recycling stage, post-terminational RNAPs one-dimensionally diffuse on DNA in downward and upward directions, and can initiate transcription again at the original and nearby promoters in the case of retaining a sigma factor. The efficiency of this event, termed here as reinitiation, increases with supplement of a sigma factor. In summary, after releasing RNA product at intrinsic termination, recycling RNAP diffuses on the DNA template for reinitiation most of the time.
journal_name
Nat Communjournal_title
Nature communicationsauthors
Kang W,Ha KS,Uhm H,Park K,Lee JY,Hohng S,Kang Cdoi
10.1038/s41467-019-14200-3subject
Has Abstractpub_date
2020-01-23 00:00:00pages
450issue
1issn
2041-1723pii
10.1038/s41467-019-14200-3journal_volume
11pub_type
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