RNAs anchoring replication complex control initiation and firing of DNA replication.

TitleRNAs anchoring replication complex control initiation and firing of DNA replication.
Publication TypeJournal Article
Year of Publication2025
AuthorsUmmarino S, Poluben L, Ebralidze AK, Autiero I, Zhang Y, Paniza T, Deshpande M, Rinaldi L, Lee JD, Bassal MA, Trinh BQ, Balk SP, Flaumenhaft R, Gerhardt J, Mirkin SM, Tenen DG, Di Ruscio A
JournalRes Sq
Date Published2025 Jan 28
ISSN2693-5015
Abstract

Coordinated initiation of DNA replication is essential to ensure efficient and timely DNA synthesis. Yet, molecular mechanism describing how replication initiation is coordinated in eukaryotic cells is not completely understood. Herein, we present data demonstrating a novel feature of RNAs transcribed in the proximity of actively replicating gene loci. We show that RNAs aNChoring ORC1 (ANCORs) to the histone variant H2A.Z are licensors of the DNA replication process. This ANCOR-H2A.Z interaction is essential for cells to initiate duplication of their genetic material. Widespread and locus-specific perturbations of these transcripts correlate with anomalous replication patterns and a notable loss of the H2A.Z replicative marker at the origin site. Collectively, we present a previously undescribed RNA-mediated mechanism that is associated with the generation of active replication origins in eukaryotic cells. Our findings delineate a strategy to modulate the origins of replication in human cells at a local and global level, with potentially broad biomedical implications.

DOI10.21203/rs.3.rs-5723221/v1
Alternate JournalRes Sq
PubMed ID39975922
PubMed Central IDPMC11838740
Grant ListK01 CA222707 / CA / NCI NIH HHS / United States
R21 CA270067 / CA / NCI NIH HHS / United States
R50 CA211304 / CA / NCI NIH HHS / United States
P01 HL131477 / HL / NHLBI NIH HHS / United States
R01 DK103858 / DK / NIDDK NIH HHS / United States
R00 CA188595 / CA / NCI NIH HHS / United States
R35 CA197697 / CA / NCI NIH HHS / United States
R35 GM130322 / GM / NIGMS NIH HHS / United States
R01 DK136116 / DK / NIDDK NIH HHS / United States
T32 HL007917 / HL / NHLBI NIH HHS / United States