单细胞组蛋白翻译后修饰（sc-hPTM2）多复分析的自动样品制备

Overview

This article presents a protocol for automating single-cell histone post-translational modification analysis using an isotopic two-plex labeling strategy. The workflow enables quantitative and high-sensitivity profiling of chromatin heterogeneity at single-cell resolution.

Key Study Components

Area of Science

• Single-cell proteomics
• Histone post-translational modifications
• Chromatin analysis

Background

• Single-cell analysis is crucial for understanding cellular heterogeneity.
• Post-translational modifications play a key role in regulating chromatin structure and function.
• Automated methods can enhance reproducibility and sensitivity in proteomic studies.
• Challenges include handling small sample sizes and complex peptide mixtures.

Purpose of Study

• To develop a robust protocol for analyzing histone modifications at single-cell resolution.
• To improve the efficiency of multiplex labeling in proteomic workflows.
• To address the challenges of low-abundance histone peptides.

Methods Used

• Reconstitution of Hep G2/C3A cells in PBS at a specified concentration.
• Adjustment of nozzle parameters for optimal sample pickup.
• Implementation of isotopic two-plex labeling for quantification.
• Use of ArgC digestion for peptide preparation.

Main Results

• Successful automation of single-cell histone modification analysis.
• Demonstrated high sensitivity and reproducibility in profiling.
• Effective resolution of complex combinatorial modified histone peptides.
• Insights into chromatin heterogeneity and epigenetic responses.

Conclusions

• The developed protocol enhances the study of chromatin dynamics at single-cell resolution.
• Automation significantly improves the efficiency of histone modification analysis.
• This method can be applied to various biological questions regarding epigenetics.

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