Evidence map›Paper›PMID 9343400›Full record

ArticleMolecular and cellular biology1997

Chromosomal double-strand breaks induce gene conversion at high frequency in mammalian cells.

D G Taghian, J A Nickoloff

Open access · greenAbstract read
In one paragraph

Article in Molecular and cellular biology, 1997. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 92 papers.

0numbers the graph read from it
0cells of the map it votes in
92citing papers in PubMed
3.3field-weighted citation impact, top 7% 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

92 citing papers in PubMed, 174 citations in OpenAlex.

  1. Article
  2. Article
  3. Article
  4. Review
  5. Article
  6. Review
  7. Article
  8. Frequent nonallelic gene conversion on the human lineage and its effect on the divergence of gene duplicates.Proceedings of the National Academy of Sciences of the United States of America · 2017
    Article
  9. Article
  10. TALEN-Mediated FLAG-Tagging of Endogenous Histone Methyltransferase DOT1L.Advances in bioscience and biotechnology (Print) · 2017
    Article
  11. Article
  12. Article
  13. Gene editing toward the use of autologous therapies in recessive dystrophic epidermolysis bullosa.Translational research : the journal of laboratory and clinical medicine · 2016
    Review
  14. Review
  15. Review
  16. Article
  17. Article
  18. Article
  19. Transcription and recombination: when RNA meets DNA.Cold Spring Harbor perspectives in biology · 2014
    Review
  20. Article

32 more citing papers are in PubMed but not listed here.

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.

D G TaghianDepartment of Cancer Biology, Harvard University School of Public Health, Boston, Massachusetts, USA.
J A Nickoloff
Harvard University · US

Funding

MECHANISMS OF DNA DAMAGE INDUCED RECOMBINATIONR01CA054079 · NCI · UNIVERSITY OF NEW MEXICO · PI NICKOLOFF, JAC A · 1995 to 2002
$684k
IONIZING RADIATION--INDUCED RECOMBINATIONR01CA062058 · NCI · UNIVERSITY OF NEW MEXICO · PI NICKOLOFF, JAC A · 1994 to 1997
–
MAMMALIAN MODELS FOR RADIATION-INDUCED RECOMBINATIONR29CA054079 · NCI · HARVARD UNIVERSITY (MEDICAL SCHOOL) · PI NICKOLOFF, JAC A · 1990 to 1994
–
NCI NIH HHS CA54079NCI NIH HHS CA62058
6 · The paper itself

Abstract

Double-strand breaks (DSBs) stimulate chromosomal and extrachromosomal recombination and gene targeting. Transcription also stimulates spontaneous recombination by an unknown mechanism. We used Saccharomyces cerevisiae I-SceI to stimulate recombination between neo direct repeats in Chinese hamster ovary (CHO) cell chromosomal DNA. One neo allele was controlled by the dexamethasone-inducible mouse mammary tumor virus promoter and inactivated by an insertion containing an I-SceI site at which DSBs were introduced in vivo. The other neo allele lacked a promoter but carried 12 phenotypically silent single-base mutations that create restriction sites (restriction fragment length polymorphisms). This system allowed us to generate detailed conversion tract spectra for recipient alleles transcribed at high or low levels. Transient in vivo expression of I-SceI increased homologous recombination 2,000- to 10,000-fold, yielding recombinants at frequencies as high as 1%. Strikingly, 97% of these products arose by gene conversion. Most products had short, bidirectional conversion tracts, and in all cases, donor neo alleles (i.e., those not suffering a DSB) remained unchanged, indicating that conversion was fully nonreciprocal. DSBs in exogenous DNA are usually repaired by end joining requiring little or no homology or by nonconservative homologous recombination (single-strand annealing). In contrast, we show that chromosomal DSBs are efficiently repaired via conservative homologous recombination, principally gene conversion without associated crossing over. For DSB-induced events, similar recombination frequencies and conversion tract spectra were found under conditions of low and high transcription. Thus, transcription does not further stimulate DSB-induced recombination, nor does it appear to affect the mechanism(s) by which DSBs induce gene conversion.

Indexed as

Chromosome BreakageRecombination, GeneticAnimalsCHO CellsCricetinaeDeoxyribonucleases, Type II Site-SpecificDexamethasoneGene ConversionGenetic MarkersMammary Tumor Virus, MouseMutationPolymorphism, Restriction Fragment LengthPromoter Regions, GeneticResearch DesignSaccharomyces cerevisiae ProteinsTranscription, GeneticDeoxyribonucleases, Type II Site-SpecificDexamethasoneGenetic MarkersSaccharomyces cerevisiae ProteinsSCEI protein, S cerevisiae

Identifiers

PMID9343400
PMCPMC232490
OpenAlexW2153536915

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.