R-ChIP for genome-wide mapping of R-loops by using catalytically inactive RNASEH1
Nascent RNA may form a three-stranded structure with DNA, called an R-loop, which has been linked to fundamental biological processes such as transcription, replication and genome instability. Here, we provide a detailed protocol for a newly developed strategy, named R-ChIP, for robust capture of R-...
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| Published in: | Nature protocols Vol. 14; no. 5; pp. 1661 - 1685 |
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| Main Authors: | , , , |
| Format: | Journal Article |
| Language: | English |
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Nature Publishing Group
01.05.2019
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| ISSN: | 1754-2189, 1750-2799, 1750-2799 |
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| Abstract | Nascent RNA may form a three-stranded structure with DNA, called an R-loop, which has been linked to fundamental biological processes such as transcription, replication and genome instability. Here, we provide a detailed protocol for a newly developed strategy, named R-ChIP, for robust capture of R-loops genome-wide. Distinct from R-loop-mapping methods based on the monoclonal antibody S9.6, which recognizes RNA-DNA hybrid structures, R-ChIP involves expression of an exogenous catalytically inactive RNASEH1 in cells to bind RNA-DNA hybrids but not resolve them. This is followed by chromatin immunoprecipitation (ChIP) of the tagged RNASEH1 and construction of a strand-specific library for deep sequencing. It takes ~3 weeks to establish a stable cell line expressing the mutant enzyme and 5 more days to proceed with the R-ChIP protocol. In principle, R-ChIP is applicable to both cell lines and animals, as long as the catalytically inactive RNASEH1 can be expressed to study the dynamics of R-loop formation and resolution, as well as its impact on the functionality of the genome. In our recent studies with R-ChIP, we showed an intimate spatiotemporal relationship between R-loops and RNA polymerase II pausing/pause release, as well as linking augmented R-loop formation to DNA damage response induced by driver mutations of key splicing factors associated with myelodysplastic syndrome (MDS). |
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| AbstractList | Nascent RNA may form a three-stranded structure with DNA, called an R-loop, which has been linked to fundamental biological processes such as transcription, replication and genome instability. Here, we provide a detailed protocol for a newly developed strategy, named R-ChIP, for robust capture of R-loops genome-wide. Distinct from R-loop-mapping methods based on the monoclonal antibody S9.6, which recognizes RNA–DNA hybrid structures, R-ChIP involves expression of an exogenous catalytically inactive RNASEH1 in cells to bind RNA–DNA hybrids but not resolve them. This is followed by chromatin immunoprecipitation (ChIP) of the tagged RNASEH1 and construction of a strand-specific library for deep sequencing. It takes ~3 weeks to establish a stable cell line expressing the mutant enzyme and 5 more days to proceed with the R-ChIP protocol. In principle, R-ChIP is applicable to both cell lines and animals, as long as the catalytically inactive RNASEH1 can be expressed to study the dynamics of R-loop formation and resolution, as well as its impact on the functionality of the genome. In our recent studies with R-ChIP, we showed an intimate spatiotemporal relationship between R-loops and RNA polymerase II pausing/pause release, as well as linking augmented R-loop formation to DNA damage response induced by driver mutations of key splicing factors associated with myelodysplastic syndrome (MDS).This protocol describes the steps in R-ChIP, a procedure based on chromatin immunoprecipitation (ChIP) of an exogenously expressed mutant RNASEH1 to capture the genome-wide distribution of R-loops. Nascent RNA may form a three-stranded structure with DNA, called an R-loop, which has been linked to fundamental biological processes such as transcription, replication and genome instability. Here, we provide a detailed protocol for a newly developed strategy, named R-ChIP, for robust capture of R-loops genome-wide. Distinct from R-loop-mapping methods based on the monoclonal antibody S9.6, which recognizes RNA-DNA hybrid structures, R-ChIP involves expression of an exogenous catalytically inactive RNASEH1 in cells to bind RNA-DNA hybrids but not resolve them. This is followed by chromatin immunoprecipitation (ChIP) of the tagged RNASEH1 and construction of a strand-specific library for deep sequencing. It takes ~3 weeks to establish a stable cell line expressing the mutant enzyme and 5 more days to proceed with the R-ChIP protocol. In principle, R-ChIP is applicable to both cell lines and animals, as long as the catalytically inactive RNASEH1 can be expressed to study the dynamics of R-loop formation and resolution, as well as its impact on the functionality of the genome. In our recent studies with R-ChIP, we showed an intimate spatiotemporal relationship between R-loops and RNA polymerase II pausing/pause release, as well as linking augmented R-loop formation to DNA damage response induced by driver mutations of key splicing factors associated with myelodysplastic syndrome (MDS).Nascent RNA may form a three-stranded structure with DNA, called an R-loop, which has been linked to fundamental biological processes such as transcription, replication and genome instability. Here, we provide a detailed protocol for a newly developed strategy, named R-ChIP, for robust capture of R-loops genome-wide. Distinct from R-loop-mapping methods based on the monoclonal antibody S9.6, which recognizes RNA-DNA hybrid structures, R-ChIP involves expression of an exogenous catalytically inactive RNASEH1 in cells to bind RNA-DNA hybrids but not resolve them. This is followed by chromatin immunoprecipitation (ChIP) of the tagged RNASEH1 and construction of a strand-specific library for deep sequencing. It takes ~3 weeks to establish a stable cell line expressing the mutant enzyme and 5 more days to proceed with the R-ChIP protocol. In principle, R-ChIP is applicable to both cell lines and animals, as long as the catalytically inactive RNASEH1 can be expressed to study the dynamics of R-loop formation and resolution, as well as its impact on the functionality of the genome. In our recent studies with R-ChIP, we showed an intimate spatiotemporal relationship between R-loops and RNA polymerase II pausing/pause release, as well as linking augmented R-loop formation to DNA damage response induced by driver mutations of key splicing factors associated with myelodysplastic syndrome (MDS). Nascent RNA may form a three-stranded structure with DNA, called an R-loop, which has been linked to fundamental biological processes such as transcription, replication and genome instability. Here, we provide a detailed protocol for a newly developed strategy, named R-ChIP, for robust capture of R-loops genome-wide. Distinct from R-loop-mapping methods based on the monoclonal antibody S9.6, which recognizes RNA-DNA hybrid structures, R-ChIP involves expression of an exogenous catalytically inactive RNASEH1 in cells to bind RNA-DNA hybrids but not resolve them. This is followed by chromatin immunoprecipitation (ChIP) of the tagged RNASEH1 and construction of a strand-specific library for deep sequencing. It takes ~3 weeks to establish a stable cell line expressing the mutant enzyme and 5 more days to proceed with the R-ChIP protocol. In principle, R-ChIP is applicable to both cell lines and animals, as long as the catalytically inactive RNASEH1 can be expressed to study the dynamics of R-loop formation and resolution, as well as its impact on the functionality of the genome. In our recent studies with R-ChIP, we showed an intimate spatiotemporal relationship between R-loops and RNA polymerase II pausing/pause release, as well as linking augmented R-loop formation to DNA damage response induced by driver mutations of key splicing factors associated with myelodysplastic syndrome (MDS). |
| Author | Fu, Xiang-Dong Chen, Liang Zhang, Xuan Chen, Jia-Yu |
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| BackLink | https://www.ncbi.nlm.nih.gov/pubmed/30996261$$D View this record in MEDLINE/PubMed |
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| SubjectTerms | Animals Biological activity Cell Line Cell lines Chromatin Chromatin Immunoprecipitation - methods Chromosome Mapping - methods Deoxyribonucleic acid DNA DNA - chemistry DNA - genetics DNA damage DNA structure DNA-directed RNA polymerase Gene expression Gene mapping Genomes Genomic instability Hybrid structures Hybrids Immunoprecipitation Mapping Monoclonal antibodies Mutation Myelodysplastic syndrome R-loops Ribonuclease H - chemistry Ribonuclease H - genetics Ribonuclease H - metabolism Ribonucleic acid RNA RNA - chemistry RNA - genetics RNA polymerase RNA polymerase II Splicing Splicing factors Stability Transcription |
| Title | R-ChIP for genome-wide mapping of R-loops by using catalytically inactive RNASEH1 |
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