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Updated: Jan 1, 2026
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Chromatin Isolation by RNA Purification ChIRP
Published on: March 25, 2012
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PIRCh-seq: functional classification of non-coding RNAs associated with distinct histone modifications
Jingwen Fang1, Qing Ma2,3, Ci Chu2
1Division of Molecular Medicine, Hefei National Laboratory for Physical Sciences at Microscale, the CAS Key Laboratory of Innate Immunity and Chronic Disease, CAS Center for Excellence in Molecular Cell Sciences, Department of Oncology of the First Affiliated Hospital, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, 230027, China.
Genome Biology
|December 22, 2019
Summary
We developed a new method, PIRCh-seq, to study RNA molecules associated with chromatin. This technique identifies numerous chromatin-associated RNAs, revealing their functional roles and interactions with histone modifications.
Area of Science:
- Molecular Biology
- Genomics
- Epigenetics
Background:
- Chromatin-associated RNAs play crucial roles in gene regulation.
- Understanding RNA-chromatin interactions is essential for deciphering cellular processes.
- Existing methods face challenges in distinguishing functional chromatin RNAs from nascent transcripts.
Purpose of the Study:
- To develop a novel method for comprehensive, histone modification-specific profiling of chromatin-associated RNAs.
- To identify and characterize non-coding RNAs involved in chromatin regulation.
- To investigate the nature of RNA-chromatin interactions, including allele-specific binding.
Main Methods:
- Development and application of PIRCh-seq (Profiling of RNA on Chromatin by sequencing).
- Analysis of chromatin-associated RNAs across different cell types.
- Classification of non-coding RNAs based on histone modification association patterns.
Main Results:
- PIRCh-seq enables a comprehensive survey of chromatin-associated RNAs with reduced nascent transcript contamination.
- Hundreds of chromatin-associated RNAs were identified, with non-coding RNAs being significantly enriched.
- Functional classification of RNAs based on histone modification patterns and discovery of allele-specific RNA-chromatin interactions.
Conclusions:
- PIRCh-seq provides a valuable resource for studying chromatin-associated lncRNAs and their functions.
- The study elucidates fundamental mechanisms governing RNA-chromatin interactions.
- Findings offer new insights into the regulatory roles of non-coding RNAs in chromatin organization.
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