Publication Date:
2010-01-30
Description:
In vivo studies suggest that replication forks are arrested by encounters with head-on transcription complexes. Yet, the fate of the replisome and RNA polymerase (RNAP) after a head-on collision is unknown. We found that the Escherichia coli replisome stalls upon collision with a head-on transcription complex, but instead of collapsing, the replication fork remains highly stable and eventually resumes elongation after displacing the RNAP from DNA. We also found that the transcription-repair coupling factor Mfd promotes direct restart of the fork after the collision by facilitating displacement of the RNAP. These findings demonstrate the intrinsic stability of the replication apparatus and a previously unknown role for the transcription-coupled repair pathway in promoting replication past a RNAP block.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2861996/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉 〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2861996/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Pomerantz, Richard T -- O'Donnell, Mike -- R01 GM038839/GM/NIGMS NIH HHS/ -- R01 GM038839-23/GM/NIGMS NIH HHS/ -- Howard Hughes Medical Institute/ -- New York, N.Y. -- Science. 2010 Jan 29;327(5965):590-2. doi: 10.1126/science.1179595.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉The Rockefeller University, Howard Hughes Medical Institute, 1230 York Avenue, New York, NY 10021, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20110508" target="_blank"〉PubMed〈/a〉
Keywords:
Bacterial Proteins/metabolism
;
DNA Repair
;
*DNA Replication
;
DNA, Bacterial/*metabolism
;
DNA-Directed DNA Polymerase/metabolism
;
DNA-Directed RNA Polymerases/*metabolism
;
Escherichia coli/genetics/*metabolism
;
Escherichia coli Proteins/metabolism
;
Templates, Genetic
;
Transcription Factors/metabolism
;
Transcription, Genetic
Print ISSN:
0036-8075
Electronic ISSN:
1095-9203
Topics:
Biology
,
Chemistry and Pharmacology
,
Computer Science
,
Medicine
,
Natural Sciences in General
,
Physics
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