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Chromatin Immunoprecipitation- ChIP

Chromatin Immunoprecipitation- ChIP

Chromatin immunoprecipitation, or ChIP, is an antibody-based technique used to identify sites on DNA that bind to transcription factors of interest or histone proteins. It also helps determine the type of histone modifications such as acetylation, phosphorylation, or methylation.
Types of ChIP
ChIP can be divided into two types - X-ChIP and N-ChIP. X-ChIP involves in vivo cross-linking of histones and regulatory proteins to DNA, fragmenting the DNA by sonication, and isolating the protein-DNA...

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High Sensitivity Measurement of Transcription Factor-DNA Binding Affinities by Competitive Titration Using Fluorescence Microscopy

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Published on: February 7, 2019

A cost-effective tsCUT&Tag method for profiling transcription factor binding landscape.

Leiming Wu^1,2, Zi Luo¹, Yanni Shi¹

¹National Key Laboratory of Crop Genetic Improvement, Hubei Hongshan Laboratory, Huazhong Agricultural University, Wuhan, 430070, China.

Journal of Integrative Plant Biology

|September 1, 2022

Summary

Researchers developed a new transient and simplified CUT&Tag (tsCUT&Tag) method for plant transcription factor binding landscape analysis. This low-cost, high-throughput technique offers improved data quality and resolution for understanding gene regulation in plants.

Keywords:

CUT&Tag ChIP-seq binding sites machine learning transcription factor transient expression

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Area of Science:

Plant molecular biology
Epigenetics
Genomics

Background:

Understanding the transcription factor binding landscape (TFBL) is crucial for analyzing gene regulatory networks controlling agronomic traits.
Existing methods for in vivo chromatin profiling in plants are often costly and lack high-throughput capabilities.

Purpose of the Study:

To develop a low-cost, high-throughput in vivo chromatin profiling method for plants.
To enable efficient analysis of the transcription factor binding landscape (TFBL) in plants.

Main Methods:

Developed a transient and simplified cleavage under targets and tagmentation (tsCUT&Tag) method.
Combined transient expression of transcription factor proteins in protoplasts with a simplified CUT&Tag protocol, omitting nucleus extraction.
Integrated tsCUT&Tag with machine learning strategies.

Main Results:

The tsCUT&Tag method demonstrated higher data quality and signal resolution compared to traditional ChIP-seq.
Achieved superior results with lower sequencing depth.
The combined tsCUT&Tag and machine learning approach shows potential for comprehensive TFBL profiling.

Conclusions:

The developed tsCUT&Tag method is an effective, low-cost, and high-throughput tool for plant TFBL analysis.
This technique significantly improves upon existing chromatin profiling methods in plants.
The integration with machine learning offers a powerful strategy for future plant gene regulatory network studies.