Evidence map›Paper›PMID 15890782›Full record

ArticleProceedings of the National Academy of Sciences of the United States of America2005

An N-ethyl-N-nitrosourea screen for genes involved in variegation in the mouse.

Marnie E Blewitt, Nicola K Vickaryous, Sarah J Hemley, Alyson Ashe, Timothy J Bruxner, Jost I Preis, Ruth Arkell, Emma Whitelaw

Abstract readComparative Study
In one paragraph

Article in Proceedings of the National Academy of Sciences of the United States of America, 2005. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 107 papers.

0numbers the graph read from it
0cells of the map it votes in
107citing papers in PubMed
3.4field-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

107 citing papers in PubMed, 189 citations in OpenAlex.

  1. Article
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  6. Professor Emma Whitelaw, a pioneer of epigenetic inheritance.Frontiers in epigenetics and epigenomics · 2025
    Article
  7. Article
  8. Article
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  10. Remodeling of perturbed chromatin can initiate de novo transcriptional and post-transcriptional silencing.Proceedings of the National Academy of Sciences of the United States of America · 2024
    Article
  11. Review
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  14. Review
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  19. Article
  20. The Molecular and Nuclear Dynamics of X-Chromosome Inactivation.Cold Spring Harbor perspectives in biology · 2022
    Review

47 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

8 authors at 2 institutions in 2 countries.

Marnie E BlewittSchool of Molecular and Microbial Biosciences, University of Sydney, Butlin Avenue, New South Wales 2006, Australia.
Nicola K Vickaryous
Sarah J Hemley
Alyson Ashe
Timothy J Bruxner
Jost I Preis
Ruth Arkell
Emma Whitelaw
University of Sydney · AUMedical Research Council · GB

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

We have developed a sensitized screen to identify genes involved in gene silencing, using random N-ethyl-N-nitrosourea mutagenesis on mice carrying a variegating GFP transgene. The dominant screen has produced six mutant lines, including both suppressors and enhancers of variegation. All are semidominant and five of the six are homozygous embryonic lethal. In one case, the homozygous lethality depends on sex: homozygous females die at midgestation and display abnormal DNA methylation of the X chromosome, whereas homozygous males are viable. Linkage analysis reveals that the mutations map to unique chromosomal locations. We have studied the effect of five of the mutations on expression of an endogenous allele known to be sensitive to epigenetic state, agouti viable yellow. In all cases, there is an effect on penetrance, and in most cases, parent of origin and sex-specific effects are detected. This screen has identified genes that are involved in epigenetic reprogramming of the genome, and the behavior of the mutant lines suggests a common mechanism between X inactivation and transgene and retrotransposon silencing. Our findings raise the possibility that the presence or absence of the X chromosome in mammals affects the establishment of the epigenetic state at autosomal loci by acting as a sink for proteins involved in gene silencing. The study demonstrates the power of sensitized screens in the mouse not only for the discovery of novel genes involved in a particular process but also for the elucidation of the biology of that process.

Indexed as

AllelesGene SilencingPhenotypeAnimalsChromosome MappingDNA MethylationEpigenesis, GeneticEthylnitrosoureaFlow CytometryGenetic TestingGreen Fluorescent ProteinsMiceMice, TransgenicMutagenesisPigmentationSex FactorsEthylnitrosoureaGreen Fluorescent Proteins

Identifiers

PMID15890782
PMCPMC1140414
OpenAlexW2089778660

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.