Evidence map›Paper›PMID 14762063›Full record

ArticleGenome research2004

Patterns of evolutionary constraints in intronic and intergenic DNA of Drosophila.

Daniel L Halligan, Adam Eyre-Walker, Peter Andolfatto, Peter D Keightley

Open access · bronzeAbstract readComparative Study
In one paragraph

Article in Genome research, 2004. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 67 papers.

0numbers the graph read from it
0cells of the map it votes in
67citing papers in PubMed
–field-weighted citation impact
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

67 citing papers in PubMed, 111 citations in OpenAlex.

  1. Dinucleotide preferences underlie apparent codon preference reversals in theProceedings of the National Academy of Sciences of the United States of America · 2025
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  12. Causes of natural variation in fitness: evidence from studies of Drosophila populations.Proceedings of the National Academy of Sciences of the United States of America · 2015
    Review
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7 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

4 authors at 2 institutions in 1 country.

Daniel L HalliganUniversity of Edinburgh, School of Biological Sciences, Edinburgh EH9 3JT, UK.
Adam Eyre-Walker
Peter Andolfatto
Peter D Keightley
University of Edinburgh · GBUniversity of Sussex · GB

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

We develop methods to infer levels of evolutionary constraints in the genome by comparing rates of nucleotide substitution in noncoding DNA with rates predicted from rates of synonymous site evolution in adjacent genes or other putatively neutrally evolving sites, while accounting for differences in base composition. We apply the methods to estimate levels of constraint in noncoding DNA of Drosophila. In introns, constraint (the estimated fraction of mutations that are selectively eliminated) is absolute at the 5' and 3' splice junction dinucleotides, and averages 72% in base pairs 3-6 at the 5'-end. Constraint at the 5' base pairs 3-6 is significantly lower in the lineage leading to Drosophila melanogaster than in Drosophila simulans, a finding that agrees with other features of genome evolution in Drosophila and indicates that the effect of selection on intron function has been weaker in the melanogaster lineage. Elsewhere in intron sequences, the rate of nucleotide substitution is significantly higher than at synonymous sites. By using intronic sites outside splice control regions as a putative neutrally evolving standard, constraint in the 500 bp of intergenic DNA upstream and downstream regions of protein-coding genes averages approximately 44%. Although the estimated level of constraint in intergenic regions close to genes is only about one-half of that of amino acid sites, selection against single-nucleotide mutations in intergenic DNA makes a substantial contribution to the mutation load in Drosophila.

Indexed as

Evolution, MolecularAnimalsConserved SequenceDNA, IntergenicDrosophilaDrosophila melanogasterGene FrequencyIntronsModels, StatisticalMolecular Sequence DataMonte Carlo MethodSequence AlignmentDNA, Intergenic

Identifiers

PMID14762063
PMCPMC327102
OpenAlexW2057202284

What OpenQuestion holds

Textmetadata
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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.