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Novel classes of replication-associated transcripts discovered in viruses.

Zsolt Boldogkői1, Zsolt Balázs1, Norbert Moldován1

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Area of Science:

  • Molecular Biology
  • Virology
  • Genomics

Background:

  • RNA molecules are crucial for DNA replication priming and telomerase extension.
  • Various transcripts regulate DNA replication, including primer formation, origin recognition complex recruitment, and replication fork assembly.

Purpose of the Study:

  • To investigate novel replication-associated RNAs (raRNAs) in viral transcriptomes.
  • To understand the genomic location and characteristics of these raRNAs relative to replication origins (Ori).

Main Methods:

  • Analysis of viral transcriptomes using third-generation long-read sequencing.
  • Identification and characterization of raRNAs based on their proximity and overlap with replication origins.

Main Results:

  • Discovery of novel raRNAs expressed near viral replication origins (Ori).
  • raRNAs can be protein-coding or non-coding, with overlapping regions often being untranslated regions (UTRs).
  • Identification of raRNAs across diverse viral families, with instances of hyper-editing observed.

Conclusions:

  • raRNAs represent a new class of regulatory RNAs involved in viral DNA replication.
  • Their location and structure suggest a direct role in modulating replication origin activity.
  • Further research into raRNAs could reveal new targets for antiviral strategies.