Evidence map›Paper›PMID 27546332›Full record

ArticleNature communications2016

Crosstalk between MSH2-MSH3 and polβ promotes trinucleotide repeat expansion during base excision repair.

Yanhao Lai, Helen Budworth, Jill M Beaver, Nelson L S Chan, Zunzhen Zhang, Cynthia T McMurray, Yuan Liu

Open access · goldAbstract read
In one paragraph

Article in Nature communications, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 47 papers.

0numbers the graph read from it
0cells of the map it votes in
47citing papers in PubMed
3.7field-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

47 citing papers in PubMed, 57 citations in OpenAlex.

  1. Article
  2. Huntington's disease LIG1 modifier variant increases ligase fidelity and suppresses somatic CAG repeat expansion.Proceedings of the National Academy of Sciences of the United States of America · 2026
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  4. Review
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  7. 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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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 3 institutions in 2 countries.

Yanhao LaiDepartment of Chemistry and Biochemistry, Florida International University, 11200 SW 8th Street, Miami, Florida 33199, USA.
Helen BudworthLife Sciences Division, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, 33R249, Berkeley, California 94720, USA.
Jill M BeaverBiochemistry Ph.D. Program, Florida International University, 11200 SW 8th Street, Miami, Florida 33199, USA.
Nelson L S ChanLife Sciences Division, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, 33R249, Berkeley, California 94720, USA.
Zunzhen ZhangDepartment of Occupational and Environmental Health, Sichuan University West China School of Public Health, 16#, Section 3, Renmin Nan Lu, Chengdu, Sichuan 610041, China.
Cynthia T McMurrayLife Sciences Division, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, 33R249, Berkeley, California 94720, USA.
Yuan LiuDepartment of Chemistry and Biochemistry, Florida International University, 11200 SW 8th Street, Miami, Florida 33199, USA.
Florida International University · USLawrence Berkeley National Laboratory · USSichuan University · CN

Funding

Transcription-Coupled & Replication-Associated Excision RepairP01CA092584 · NCI · UNIVERSITY OF CALIF-LAWRENC BERKELEY LAB · PI WALTER J. CHAZIN · 2001 to 2026
$89.6M
Chemical FingerprintingR01NS060115 · NINDS · UNIVERSITY OF CALIF-LAWRENC BERKELEY LAB · PI POLYZOS, ARIS A · 2007 to 2024
$7.7M
Metabolic markers for mitochondrial functionR01ES020766 · NIEHS · UNIVERSITY OF CALIF-LAWRENC BERKELEY LAB · PI MCMURRAY, CYNTHIA THERESE · 2011 to 2015
$2.3M
Trinucleotide Repeat Instability via DNA Damage and RepairR01ES023569 · NIEHS · FLORIDA INTERNATIONAL UNIVERSITY · PI LIU, YUAN · 2014 to 2018
$1.6M
NCI NIH HHS P01 CA092584NIEHS NIH HHS R01 ES020766NIEHS NIH HHS R01 ES023569NINDS NIH HHS R01 NS060115
6 · The paper itself

Abstract

Studies in knockout mice provide evidence that MSH2-MSH3 and the BER machinery promote trinucleotide repeat (TNR) expansion, yet how these two different repair pathways cause the mutation is unknown. Here we report the first molecular crosstalk mechanism, in which MSH2-MSH3 is used as a component of the BER machinery to cause expansion. On its own, pol β fails to copy TNRs during DNA synthesis, and bypasses them on the template strand to cause deletion. Remarkably, MSH2-MSH3 not only stimulates pol β to copy through the repeats but also enhances formation of the flap precursor for expansion. Our results provide direct evidence that MMR and BER, operating together, form a novel hybrid pathway that changes the outcome of TNR instability from deletion to expansion during the removal of oxidized bases. We propose that cells implement crosstalk strategies and share machinery when a canonical pathway is ineffective in removing a difficult lesion.

Indexed as

DNA RepairAnimalsBase SequenceBinding SitesDNADNA DamageDNA Polymerase betaFrataxinIron-Binding ProteinsLymphocytesModels, BiologicalMutS Homolog 2 ProteinMutS Homolog 3 ProteinProtein BindingSubstrate SpecificityTrinucleotide Repeat ExpansionDNADNA Polymerase betaFrataxinIron-Binding ProteinsMutS Homolog 2 ProteinMutS Homolog 3 Protein

Identifiers

PMID27546332
PMCPMC4996945
OpenAlexW2514955689

What OpenQuestion holds

Textmetadata
LicenceCC BY
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.