Evidence map›Paper›PMID 12384601›Full record

ArticleNucleic acids research2002

Slipped-strand DNAs formed by long (CAG)*(CTG) repeats: slipped-out repeats and slip-out junctions.

Christopher E Pearson, Mandy Tam, Yuh-Hwa Wang, S Erin Montgomery, Arvin C Dar, John D Cleary, Kerrie Nichol

Open access · bronzeAbstract read
In one paragraph

Article in Nucleic acids research, 2002. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 80 papers.

0numbers the graph read from it
0cells of the map it votes in
80citing papers in PubMed
2.4field-weighted citation impact, top 11% 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

80 citing papers in PubMed, 157 citations in OpenAlex.

  1. Slippage reconfiguration of trinucleotide repeat hairpins impedes resolution by human replication protein A.Proceedings of the National Academy of Sciences of the United States of America · 2026
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  6. APOBEC3A deaminates CTG hairpin loops to promote fragility and instability of expanded CAG/CTG repeats.Proceedings of the National Academy of Sciences of the United States of America · 2025
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20 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

7 authors at 1 institution in 1 country.

Christopher E PearsonProgram of Genetics and Genomic Biology, The Hospital for Sick Children, 555 University Avenue, Elm Wing 11-135, Toronto, Ontario M5G 1X8, Canada. cepearson@genet.sickkids.on.ca
Mandy Tam
Yuh-Hwa Wang
S Erin Montgomery
Arvin C Dar
John D Cleary
Kerrie Nichol
SickKids Foundation · CA

Funding

MOLECULAR STUDIES OF CANCER SPECIFIC FRAGILE SITESR01CA085826 · NCI · WAKE FOREST UNIVERSITY HEALTH SCIENCES · PI WANG, YUH-HWA · 2000 to 2008
$2.0M
NCI NIH HHS CA85826NCI NIH HHS R01 CA085826
6 · The paper itself

Abstract

The disease-associated expansion of (CTG)*(CAG) repeats is likely to involve slipped-strand DNAs. There are two types of slipped DNAs (S-DNAs): slipped homoduplex S-DNAs are formed between two strands having the same number of repeats; and heteroduplex slipped intermediates (SI-DNAs) are formed between two strands having different numbers of repeats. We present the first characterization of S-DNAs formed by disease-relevant lengths of (CTG)*(CAG) repeats which contained all predicted components including slipped-out repeats and slip-out junctions, where two arms of the three-way junction were composed of complementary paired repeats. In S-DNAs multiple short slip-outs of CTG or CAG repeats occurred throughout the repeat tract. Strikingly, in SI-DNAs most of the excess repeats slipped-out at preferred locations along the fully base-paired Watson-Crick duplex, forming defined three-way slip-out junctions. Unexpectedly, slipped-out CAG and slipped-out CTG repeats were predominantly in the random-coil and hairpin conformations, respectively. Both the junctions and the slip-outs could be recognized by DNA metabolizing proteins: only the strand with the excess repeats was hypersensitive to cleavage by the junction-specific T7 endonuclease I, while slipped-out CAG was preferentially bound by single-strand binding protein. An excellent correlation was observed for the size of the slip-outs in S-DNAs and SI-DNAs with the size of the tract length changes observed in quiescent and proliferating tissues of affected patients-suggesting that S-DNAs and SI-DNAs are mutagenic intermediates in those tissues, occurring during error-prone DNA metabolism and replication fork errors.

Indexed as

Repetitive Sequences, Nucleic AcidDeoxyribonuclease IDeoxyribonucleases, Type II Site-SpecificDNADNA-Binding ProteinsDNA, Single-StrandedHumansNucleic Acid ConformationNucleic Acid HeteroduplexesSingle-Strand Specific DNA and RNA EndonucleasesDeoxyribonuclease IDeoxyribonucleases, Type II Site-SpecificDNADNA-Binding ProteinsDNA, Single-StrandedGCAGC-specific type II deoxyribonucleasesNucleic Acid HeteroduplexesSingle-Strand Specific DNA and RNA Endonucleases

Identifiers

PMID12384601
PMCPMC137136
OpenAlexW1492929429

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.