ArticleThe EMBO journal2026
The rapid delivery of RNase H variants reveals distinct classes of RNA:DNA hybrids.
Article in The EMBO journal, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Authors and funding
14 authors.
Funding
Abstract
Multiple lines of evidence suggest that RNase H1-sensitive RNA:DNA hybrids could disrupt the stability and restart of stalled replication forks. The prolonged over-expression of RNase H1 is the most popular method to manipulate RNA:DNA hybrids in situ but it cannot discriminate between direct and indirect effects resulting from their loss. To overcome this limitation, we developed iCoRD (in Cellulo RNase H Delivery) to rapidly deliver comparable amounts of either Escherichia coli RNase H1 (RnhA) or control proteins in live cells, with a negligible impact on the transcriptome. iCoRD-delivered RnhA recognises RNA:DNA hybrids in situ, is enriched in the vicinity of active replication forks and rescues replication fork progression in different stress conditions. While iCoRD-delivered RnhA had a clear impact on stress-induced, fork-proximal RNA:DNA hybrids and R-ChIP signals, it had no effect on DRIP or S9.6 Cut&Tag signals, even when these were induced by stress. Our results strongly suggest the existence of distinct populations of RNA:DNA hybrids that are best mapped by different methods and are differently sensitive to RNase H1 activity in situ.
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Registered trials
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.