Evidence map›Paper›PMID 20647503›Full record

ArticleGenetics2010

RecG protein and single-strand DNA exonucleases avoid cell lethality associated with PriA helicase activity in Escherichia coli.

Christian J Rudolph, Akeel A Mahdi, Amy L Upton, Robert G Lloyd

Open access · bronzeAbstract read
In one paragraph

Article in Genetics, 2010. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 34 papers.

0numbers the graph read from it
0cells of the map it votes in
34citing papers in PubMed
1.9field-weighted citation impact, top 15% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

34 citing papers in PubMed, 42 citations in OpenAlex.

  1. Article
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  3. Identification ofJournal of bacteriology · 2023
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  4. Generation and Repair of Postreplication Gaps in Escherichia coli.Microbiology and molecular biology reviews : MMBR · 2023
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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

4 authors at 2 institutions in 1 country.

Christian J RudolphInstitute of Genetics, University of Nottingham, Queen's Medical Centre, Nottingham NG7 2UH, UK.
Akeel A Mahdi
Amy L Upton
Robert G Lloyd
University of Nottingham · GBQueen's Medical Centre · GB

Funding

Medical Research Council G0800970
6 · The paper itself

Abstract

Replication of the Escherichia coli chromosome usually initiates at a single origin (oriC) under control of DnaA. Two forks are established and move away in opposite directions. Replication is completed when these meet in a broadly defined terminus area half way around the circular chromosome. RecG appears to consolidate this arrangement by unwinding D-loops and R-loops that PriA might otherwise exploit to initiate replication at other sites. It has been suggested that without RecG such replication generates 3' flaps as the additional forks collide and displace nascent leading strands, providing yet more potential targets for PriA. Here we show that, to stay alive, cells must have either RecG or a 3' single-stranded DNA (ssDNA) exonuclease, which can be exonuclease I, exonuclease VII, or SbcCD. Cells lacking all three nucleases are inviable without RecG. They also need RecA recombinase and a Holliday junction resolvase to survive rapid growth, but SOS induction, although elevated, is not required. Additional requirements for Rep and UvrD are identified and linked with defects in DNA mismatch repair and with the ability to cope with conflicts between replication and transcription, respectively. Eliminating PriA helicase activity removes the requirement for RecG. The data are consistent with RecG and ssDNA exonucleases acting to limit PriA-mediated re-replication of the chromosome and the consequent generation of linear DNA branches that provoke recombination and delay chromosome segregation.

Indexed as

DNA ReplicationChromosomes, BacterialDNA, BacterialDNA-Binding ProteinsDNA HelicasesDNA Mismatch RepairEscherichia coliEscherichia coli ProteinsExodeoxyribonucleasesExonucleasesHolliday Junction ResolvasesRecombination, GeneticDNA, BacterialDNA-Binding ProteinsDNA HelicasesEscherichia coli Proteinsexodeoxyribonuclease IExodeoxyribonucleasesexodeoxyribonuclease VIIExonucleasesHolliday Junction ResolvasespriA protein, E coliRecG protein, E colisbcD protein, E coli

Identifiers

PMID20647503
PMCPMC2954477
OpenAlexW2121446860

What OpenQuestion holds

Textmetadata
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.