Cited by 8DNA Repair MechanismsGenomics and Chromatin DynamicsDNA and Nucleic Acid Chemistry

RTF2 controls replication repriming and ribonucleotide excision at the replisome

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Conti, Brooke A., Ruiz, Penelope D., Broton, Cayla, Blobel, Nicolas J., Kottemann, Molly C., Sridhar, Sunandini, Lach, Francis P., Wiley, Tom F. +3 more·2024·Nature Communications

Abstract

DNA replication through a challenging genomic landscape is coordinated by the replisome, which must adjust to local conditions to provide appropriate replication speed and respond to lesions that hinder its progression. We have previously shown that proteasome shuttle proteins, DNA Damage Inducible 1 and 2 (DDI1/2), regulate Replication Termination Factor 2 (RTF2) levels at stalled replisomes, allowing fork stabilization and restart. Here, we show that during unperturbed replication, RTF2 regulates replisome localization of RNase H2, a heterotrimeric enzyme that removes RNA from RNA-DNA heteroduplexes. RTF2, like RNase H2, is essential for mammalian development and maintains normal replication speed. However, persistent RTF2 and RNase H2 at stalled replication forks prevent efficient replication restart, which is dependent on PRIM1, the primase component of DNA polymerase α-primase. Our data show a fundamental need for RTF2-dependent regulation of replication-coupled ribonucleotide removal and reveal the existence of PRIM1-mediated direct replication restart in mammalian cells.

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  • In humans, RTFDC1 is required for appropriate localization of RNAseH2 to the replication fork to remove ribonucleotides from nascent DNA via ribonucleotide excision repair.

    “However, more recent work has also shown that in humans, RTFDC1 is required for appropriate localization of RNAseH2 to the replication fork to remove ribonucleotides from nascent DNA via the ribonucleotide excision repair pathway70.”

    From Variant-to-function mapping of late-onset Alzheimer’s disease GWAS signals in human microglial cell models implicates <i>RTFDC1</i> at the <i>CASS4</i> locus (2024) · cites this paper as [70]

    The Results section (page not provided) shows that RTF2 loss reduces RNase H2 at replication forks and increases DNA-embedded ribonucleotides; the Introduction says this localization is necessary for proper ribonucleotide excision repair. However, the decisive RTF2-loss experiments used mouse embryonic fibroblasts. The passages do not establish the claim specifically for human RTFDC1. (LLM, conf=0.84)

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Authors
Conti, B. A., Ruiz, P. D., Broton, C., Blobel, N. J., Kottemann, M. C., Sridhar, S., Lach, F. P., Wiley, T. F., Sasi, N. K., Carroll, T., & Smogorzewska, A.
Affiliations
Rockefeller University (US)
Corresponding author
Smogorzewska, Agata
Venue
Nature Communications
Published
2024-03-02
Volume
15
Issue
1
Pages
1943-1943
ISSN
2041-1723 (ISSN-L)
OpenAlex
W4392348878
Cited by
8
References
4
Citations by year
2026: 4 · 2025: 2 · 2024: 2
FWCI
1.08
Type
journal article
Language
en
Open access
Locations
  • Nature Communications (publishedVersion, cc-by)
  • bioRxiv (Cold Spring Harbor Laboratory) (acceptedVersion, cc-by-nc-nd)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • PubMed Central (submittedVersion, cc-by-nc-nd)
  • RePEc: Research Papers in Economics (submittedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion)
Funders
U.S. Department of Health & Human Services | NIH | National Institute of General Medical Sciences (R01GM140400, GM066699, GM007739, GM143866)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › DNA Repair Mechanisms
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Genomics and Chromatin Dynamics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › DNA and Nucleic Acid Chemistry
Keywords
RNase H2, replication restart, replication fork stalling, replisome, PRIM1, DNA polymerase alpha-primase, RNA-DNA heteroduplex, mammalian development

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