Killelea, Tom, Hawkins, Michelle Sarah orcid.org/0000-0001-9393-8206, Howard, Jamieson Anthony Leyland orcid.org/0000-0002-4694-5427 et al. (2 more authors) (2018) DNA replication roadblocks caused by Cascade Interference complexes are alleviated by RecG DNA repair helicase. RNA Biology. pp. 1-6.
Abstract
Cascade complexes underpin E. coli CRISPR-Cas immunity systems by stimulating "adaptation" reactions that update immunity and by initiating "interference" reactions that destroy invader DNA. Recognition of invader DNA in Cascade catalysed R-loops provokes DNA capture and its subsequent integration into CRISPR loci by Cas1 and Cas2. DNA capture processes are unclear but may involve RecG helicase, which stimulates adaptation during its role responding to genome instability. We show that Cascade is a potential source of genome instability because it blocks DNA replication and that RecG helicase alleviates this by dissociating Cascade. This highlights how integrating in vitro CRISPR-Cas interference and adaptation reactions with DNA replication and repair reactions will help to determine precise mechanisms underpinning prokaryotic adaptive immunity.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2018 The Author(s). Published by Informa UK Limited, trading as Taylor & Francis Group |
Dates: |
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Institution: | The University of York |
Academic Units: | The University of York > Faculty of Sciences (York) > Biology (York) |
Depositing User: | Pure (York) |
Date Deposited: | 05 Jul 2018 12:40 |
Last Modified: | 02 Apr 2025 23:13 |
Published Version: | https://doi.org/10.1080/15476286.2018.1496773 |
Status: | Published |
Refereed: | Yes |
Identification Number: | 10.1080/15476286.2018.1496773 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:132969 |
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Description: DNA replication roadblocks caused by Cascade interference complexes are alleviated by RecG DNA repair helicase
Licence: CC-BY 2.5