Abstract Multi-protein DNA replication complexes called replisomes perform the essential process of copying cellular genetic information prior to cell division. Under ideal conditions, replisomes dissociate only after the entire genome has been duplicated. However, DNA replication rarely occurs without interruptions that can dislodge replisomes from DNA. Such events produce incompletely replicated chromosomes that, if left unrepaired, prevent the segregation of full genomes to daughter cells. To mitigate this threat, cells have evolved ‘DNA replication restart’ pathways that have been best defined in bacteria. Replication restart requires recognition and remodeling of abandoned replication forks by DNA replication restart proteins followed by reloading of the replicative DNA helicase, which subsequently directs assembly of the remaining replisome subunits. This review summarizes our current understanding of the mechanisms underlying replication restart and the proteins that drive the process in Escherichia coli (PriA, PriB, PriC and DnaT).
Mechanisms of bacterial DNA replication restart
Tricia A. Windgassen,Sarah R. Wessel,B. Bhattacharyya,J. Keck
Published 2017 in Nucleic Acids Research
ABSTRACT
PUBLICATION RECORD
- Publication year
2017
- Venue
Nucleic Acids Research
- Publication date
2017-11-30
- Fields of study
Biology, Medicine
- Identifiers
- External record
- Source metadata
Semantic Scholar, PubMed
CITATION MAP
EXTRACTION MAP
CLAIMS
CONCEPTS
- abandoned replication forks
Replication fork structures that have been dislodged from DNA before chromosome duplication is complete.
Aliases: abandoned forks, collapsed forks
- dna replication restart
A bacterial pathway that reinitiates DNA replication after a replication fork has been disrupted or abandoned.
Aliases: replication restart
- dnat
An E. coli replication restart protein that works with the restart machinery during helicase loading.
- escherichia coli
The bacterial species used as the main model for the restart mechanisms summarized in the review.
Aliases: E. coli
- pria
An E. coli replication restart protein involved in recognizing restarted fork structures and initiating helicase loading.
- prib
An E. coli replication restart protein that participates in the restart machinery.
- pric
An E. coli replication restart protein that participates in the restart machinery.
- replicative dna helicase
The helicase enzyme that unwinds duplex DNA at the replication fork during chromosome duplication.
Aliases: DNA helicase
- replisome
The multi-protein DNA replication complex responsible for copying the genome.
- replisome subunits
The individual protein components that assemble into the DNA replication machinery.
Aliases: remaining replisome subunits
REFERENCES
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