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Related Concept Videos

RNA-seq03:21

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RNA sequencing, or RNA-Seq, is a high-throughput sequencing technology used to study the transcriptome of a cell. Transcriptomics helps to interpret the functional elements of a genome and identify the molecular constituents of an organism. Additionally, it also helps in understanding the development of an organism and the occurrence of diseases. 
Before the discovery of RNA-seq, microarray-based methods and Sanger sequencing were used for transcriptome analysis. However, while...
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scNanoSeq-CUT&Tag: a single-cell long-read CUT&Tag sequencing method for efficient chromatin modification profiling

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We developed scNanoSeq-CUT&Tag, a new method for single-cell chromatin modification profiling. This tool accurately maps histone marks and transcription factor occupancy, even in complex genomic regions and repetitive elements.

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Area of Science:

  • Epigenetics and Genomics
  • Single-cell analysis
  • Molecular biology

Background:

  • Chromatin modifications are crucial epigenetic marks regulating genome function.
  • Profiling chromatin modifications in repetitive and complex genomic regions at single-cell resolution remains challenging.
  • Existing methods lack efficiency and accuracy for these difficult genomic areas.

Purpose of the Study:

  • To develop a streamlined, single-cell method for genome-wide chromatin modification profiling.
  • To adapt Cleavage Under Targets and Tagmentation (CUT&Tag) for nanopore sequencing.
  • To enable accurate profiling of histone marks and transcription factor occupancy in complex and repetitive genomic regions.

Main Methods:

  • Adaptation of CUT&Tag chemistry for nanopore sequencing.
  • Development of scNanoSeq-CUT&Tag for single-cell resolution.
  • Application to human and mouse genomes for profiling repetitive elements.

Main Results:

  • scNanoSeq-CUT&Tag accurately profiles histone marks and transcription factor occupancy at single-cell resolution.
  • The method distinguishes between different cell types.
  • Allele-specific chromatin modifications and co-occupancy patterns are efficiently mapped.
  • Accurate detection of chromatin modifications in individual copies of repetitive elements is achieved.

Conclusions:

  • scNanoSeq-CUT&Tag is a valuable single-cell tool for chromatin modification profiling.
  • The method excels in analyzing complex genomic regions and repetitive elements.
  • Enables efficient profiling of histone marks and transcription factor occupancies in previously challenging areas.