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Mass spectrometry analysis of Arabidopsis histone H3 reveals distinct combinations of post-translational modifications

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Johnson, L.·2004·Nucleic Acids Research

Abstract

Chromatin is regulated at many different levels, from higher-order packing to individual nucleosome placement. Recent studies have shown that individual histone modifications, and combinations thereof, play a key role in modulating chromatin structure and gene activity. Reported here is an analysis of Arabidopsis histone H3 modifications by nanoflow-HPLC coupled to electrospray ionization on a hybrid linear ion trap-Fourier transform mass spectrometer (LTQ/FTMS). We find that the sites of acetylation and methylation, in general, correlate well with other plants and animals. Two well-studied modifications, dimethylation of Lys-9 (correlated with silencing) and acetylation of Lys-14 (correlated with active chromatin) while abundant by themselves were rarely found on the same histone H3 tail. In contrast, dimethylation at Lys-27 and monomethylation at Lys-36 were commonly found together. Interestingly, acetylation at Lys-9 was found only in a low percentage of histones while acetylation of Lys-14 was very abundant. The two histone H3 variants, H3.1 and H3.2, also differ in the abundance of silencing and activating marks confirming other studies showing that the replication-independent histone H3 is enriched in active chromatin.

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Metadata

Authors
Johnson, L.
Venue
Nucleic Acids Research
Published
2004-12-14
Volume
32
Issue
22
Pages
6511-6518
ISSN
  • 0305-1048 (ISSN-L)
  • 1362-4962
OpenAlex
W2138248567
Cited by
252
References
4
FWCI
5.14
Type
journal article
Language
en
Open access
bronze

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Johnson, L. (2004). Mass spectrometry analysis of Arabidopsis histone H3 reveals distinct combinations of post-translational modifications. Nucleic Acids Research. https://doi.org/10.1093/nar/gkh992

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