Co-directional replication-transcription conflicts lead to replication restart
View abstract on PubMed
Summary
This summary is machine-generated.Co-directional transcription conflicts with DNA replication in vivo, disrupting the process. This requires replication restart proteins, contrary to in vitro findings, highlighting the in vivo complexity of DNA replication and transcription.
Area Of Science
- Molecular Biology
- Genomics
- Microbiology
Background
- DNA replication and transcription can conflict, especially on the lagging strand, potentially causing genomic instability.
- Genes are typically encoded on the leading strand for co-directional replication and transcription to minimize head-on conflicts.
Purpose Of The Study
- To investigate the in vivo consequences of co-directional transcription-replication encounters.
- To determine the role of replication restart proteins in resolving these conflicts in Bacillus subtilis.
Main Methods
- Studied rapidly growing Bacillus subtilis cells.
- Observed associations of replicative helicase and replication restart proteins at conflict sites.
- Analyzed transcription-dependent protein recruitment.
Main Results
- Co-directional transcription conflicts with replication in vivo, particularly at highly transcribed rRNA genes.
- Replication restart proteins and the replicative helicase are recruited in a transcription-dependent manner to sites of conflict.
- In vivo, replication restart machinery is essential for resolving both head-on and co-directional conflicts, unlike in vitro observations.
Conclusions
- Co-directional transcription poses a significant challenge to DNA replication in vivo.
- The replication restart machinery plays a crucial role in resolving conflicts between transcription and replication in living cells.
- These findings explain the necessity of auxiliary proteins for replication restart and replisome progression.