Evidence map›Paper›PMID 9383047›Full record

ArticleGenetics1997

A genetic strategy to demonstrate the occurrence of spontaneous mutations in nondividing cells within colonies of Escherichia coli.

M Reddy, J Gowrishankar

Open access · bronzeAbstract read
In one paragraph

Article in Genetics, 1997. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 16 papers.

0numbers the graph read from it
0cells of the map it votes in
16citing papers in PubMed
3.1field-weighted citation impact, top 8% 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

16 citing papers in PubMed, 30 citations in OpenAlex.

  1. Article
  2. Stress-Induced Mutagenesis.EcoSal Plus · 2012
    Article
  3. The rate of mutation of a single gene.Nucleic acids research · 2010
    Article
  4. Article
  5. Article
  6. Article
  7. Article
  8. Article
  9. Adaptive mutation in Escherichia coli.Cold Spring Harbor symposia on quantitative biology · 2000
    Review
  10. Determining mutation rates in bacterial populations.Methods (San Diego, Calif.) · 2000
    Review
  11. Sorting out mutation rates.Proceedings of the National Academy of Sciences of the United States of America · 1999
    Review
  12. Review
  13. Review
  14. Review
  15. Review
  16. Stress-induced mutagenesis in bacteria.Critical reviews in biochemistry and molecular biology
    Review
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

2 authors at 1 institution in 1 country.

M ReddyCentre for Cellular and Molecular Biology, Hyderabad, India.
J Gowrishankar
Centre for Cellular and Molecular Biology · IN

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

A genetic strategy was designed to examine the occurrence of mutations in stationary-phase populations. In this strategy, a parental population of cells is able to survive under both permissive and restrictive conditions whereas mutants at a particular target locus exhibit a conditional-lethal phenotype. Thus, by growing the population to stationary phase under restrictive conditions and then shifting it to permissive conditions, mutations that had arisen in stationary phase can be studied without confounding effects caused by the occurrence of similar mutations during growth of the population. In two different applications of this strategy, we have studied the reversion to Lac+ in stationary phase of several Lac- mutations in Escherichia coli. Our results indicate that a variety of spontaneous point mutations and deletions, particularly those that are sensitive to the mechanisms of replication slippage (for their generation) and methyl-directed mismatch repair (for their correction), can arise in nondividing populations of cells within a colony. The frequency of their occurrence was also elevated in mutS strains, which are defective in such mismatch repair. These data have relevance to the ongoing debate on adaptive or directed mutations in bacteria.

Indexed as

Calcium-Binding ProteinsEscherichia coli ProteinsMutagenesisPeriplasmic Binding ProteinsBacterial ProteinsCell DivisionChromosomes, BacterialEscherichia coliF FactorLac OperonLac RepressorsMonosaccharide Transport ProteinsRepressor ProteinsTranscription FactorsUDPglucose 4-EpimeraseBacterial ProteinsCalcium-Binding ProteinsEscherichia coli Proteinsgalactose-binding proteingalactose epimeraseLacI protein, E coliLac RepressorsMonosaccharide Transport ProteinsPeriplasmic Binding ProteinsRepressor ProteinsTex protein, Bordetella pertussisTranscription FactorsUDPglucose 4-Epimerase

Identifiers

PMID9383047
PMCPMC1208273
OpenAlexW1830313586

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.