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Updated: Jul 2, 2026

Global Level Quantification of Histone Post-Translational Modifications in a 3D Cell Culture Model of Hepatic Tissue
Published on: May 5, 2022
Tissue-specific expression and post-translational modification of histone H3 variants
Benjamin A Garcia1, C Eric Thomas, Neil L Kelleher
1Institute for Genomic Biology, Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, USA. bagarcia@princeton.edu.
Histone H3 proteins show tissue-specific modifications across 10 rat tissues. Researchers identified a novel testes-specific H3 variant using advanced proteomics techniques.
Area of Science:
- Biochemistry
- Proteomics
- Molecular Biology
Background:
- Histone H3 proteins are crucial for DNA packaging and gene regulation.
- Post-translational modifications (PTMs) on histones significantly impact cellular processes.
- Understanding tissue-specific histone modifications is key to deciphering cell function.
Purpose of the Study:
- To investigate tissue-specific expression and PTMs of histone H3 in rats.
- To compare global PTM abundance across different rat tissues.
- To identify novel histone H3 variants and their modifications.
Main Methods:
- Middle Down proteomics platform for histone H3 analysis.
- Electrospray ionization with Fourier-transform mass spectrometry (ESI/FTMS).
- Electron capture dissociation (ECD) for PTM analysis.
Main Results:
- Significant tissue-specific differences in histone H3 expression and PTMs were observed.
- Histone H3 proteins were generally hypomodified in heart, liver, and testes.
- Histone H3.3 showed hypermodification compared to H3.2 in certain tissues.
- A novel rat testes-specific H3 protein was identified.
Conclusions:
- Rat histone H3 exhibits significant tissue-specific expression and modification patterns.
- The study identified a novel histone H3 variant unique to rat testes.
- These findings contribute to understanding the role of histone modifications in tissue differentiation and function.
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