Evidence map›Paper›PMID 11691850›Full record

ArticleGenome research2001

Determinants of CpG islands: expression in early embryo and isochore structure.

L Ponger, L Duret, D Mouchiroud

Abstract readComparative Study
In one paragraph

Article in Genome research, 2001. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 46 papers.

0numbers the graph read from it
0cells of the map it votes in
46citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

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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

46 citing papers in PubMed.

  1. Cardiac epigenome in heart development and disease.Nature reviews. Cardiology · 2026
    Review
  2. Article
  3. Article
  4. Transcriptional regulation ofFrontiers in cell and developmental biology · 2022
    Article
  5. Review
  6. Article
  7. Article
  8. Evolutionary bioinformatics online · 2019
    Article
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  11. Article
  12. Article
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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

3 authors.

L PongerLaboratoire de Biométrie et Biologie Evolutive, Unité Nixte de Recherche Centre National de la Recherche Scientifique 5558-Université Claude Bernard, 69622 Villeurbanne Cedex, France. ponger@biomserv.univ-lyon1.fr
L Duret
D Mouchiroud

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

In an attempt to understand the origin of CpG islands (CGIs) in mammalian genomes, we have studied their location and structure according to the expression pattern of genes and to the G + C content of isochores in which they are embedded. We show that CGIs located over the transcription start site (named start CGIs) are very different structurally from the others (named no-start CGIs): (1) 61.6% of the no-start CGIs are due to repeated sequences (79 % are due to Alus), whereas only 5.6% of the start CGIs are due to such repeats; (2) start CGIs are longer and display a higher CpGo/e ratio and G + C level than no-start CGIs. The frequency of tissue-specific genes associated to a start CGI varies according to the genomic G + C content, from 25% in G + C-poor isochores to 64% in G + C-rich isochores. Conversely, the frequency of housekeeping genes associated to a start CGI (90%) is independent of the isochore context. Interestingly, the structure of start CGIs is very similar for tissue-specific and housekeeping genes. Moreover, 93% of genes expressed in early embryo are found to exhibit a CpG island over their transcription start point. These observations are consistent with the hypothesis that the occurrence of these CGIs is the consequence of gene expression at this stage, when the methylation pattern is installed.

Indexed as

Transcription Initiation SiteAnimalsBase CompositionCpG IslandsEmbryo, MammalianExpressed Sequence TagsGC Rich SequenceGene Expression ProfilingGene Expression Regulation, DevelopmentalGenesHumansMiceOrgan SpecificityRepetitive Sequences, Nucleic Acid

Identifiers

PMID11691850
PMCPMC311164

What OpenQuestion holds

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Registered trials

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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.