Proteomics

Dataset Information

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Systematic quantitative analysis of H2A and H2B variants by targeted proteomics


ABSTRACT: Background: Histones organize DNA into chromatin through a variety of processes. Among them, a vast diversity of histone variants can be incorporated into chromatin to finely modulate its organization and functionality. Classically, the study of histone variants has largely relied on antibody-based assays. However, antibodies have a limited efficiency to discriminate between highly similar histone variants. Results: In this study, we established a mass spectrometry-based analysis to address this challenge. We developed a targeted proteomics method, using Single Reaction Monitoring (SRM) or Parallel Reaction Monitoring (PRM), to quantify a maximum number of histone variants in a single multiplexed assay, even when histones are present in a crude extract. This strategy was developed on H2A and H2B variants, using 55 peptides corresponding to 25 different histone sequences, among which a few differ by a single amino acid. The methodology was then applied to mouse testis extracts in which almost all histone variants are expressed. It confirmed the abundance profiles of several testis-specific histones during successive stages of spermatogenesis and the existence of predicted H2A.L.1 isoforms. This methodology was also used to explore the over-expression pattern of H2A.L.1 isoforms in a mouse model of male infertility. Conclusions: Our results demonstrate that targeted proteomics is a powerful method to quantify highly similar histone variants and isoforms. The developed method can be easily transposed to the study of human histone variants, whose abundance can be deregulated in various diseases.

INSTRUMENT(S): LTQ Orbitrap

ORGANISM(S): Mus Musculus (mouse)

TISSUE(S): Testis

SUBMITTER: Sara EL KENNANI  

LAB HEAD: Virginie Brun

PROVIDER: PXD008358 | Pride | 2018-01-16

REPOSITORIES: Pride

Dataset's files

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Action DRS
F112753.dat-pride.pride.mgf.gz Mgf
F112753.dat-pride.pride.mztab.gz Mztab
F112753.dat-pride.xml.gz Xml
F112754.dat-pride.pride.mgf.gz Mgf
F112754.dat-pride.pride.mztab.gz Mztab
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Publications

Systematic quantitative analysis of H2A and H2B variants by targeted proteomics.

El Kennani Sara S   Adrait Annie A   Permiakova Olga O   Hesse Anne-Marie AM   Ialy-Radio Côme C   Ferro Myriam M   Brun Virginie V   Cocquet Julie J   Govin Jérôme J   Pflieger Delphine D  

Epigenetics & chromatin 20180112 1


<h4>Background</h4>Histones organize DNA into chromatin through a variety of processes. Among them, a vast diversity of histone variants can be incorporated into chromatin and finely modulate its organization and functionality. Classically, the study of histone variants has largely relied on antibody-based assays. However, antibodies have a limited efficiency to discriminate between highly similar histone variants.<h4>Results</h4>In this study, we established a mass spectrometry-based analysis t  ...[more]

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