A giant virus genome is densely packaged by stable nucleosomes within virions
Copyright © 2022 The Author(s). Published by Elsevier Inc. All rights reserved..
The two doublet histones of Marseillevirus are distantly related to the four eukaryotic core histones and wrap 121 base pairs of DNA to form remarkably similar nucleosomes. By permeabilizing Marseillevirus virions and performing genome-wide nuclease digestion, chemical cleavage, and mass spectrometry assays, we find that the higher-order organization of Marseillevirus chromatin fundamentally differs from that of eukaryotes. Marseillevirus nucleosomes fully protect DNA within virions as closely abutted 121-bp DNA-wrapped cores without linker DNA or phasing along genes. Likewise, we observed that nucleosomes reconstituted onto multi-copy tandem repeats of a nucleosome-positioning sequence are tightly packed. Dense promiscuous packing of fully wrapped nucleosomes rather than "beads on a string" with genic punctuation represents a distinct mode of DNA packaging by histones. We suggest that doublet histones have evolved for viral genome protection and may resemble an early stage of histone differentiation leading to the eukaryotic octameric nucleosome.
| Errataetall: |
CommentIn: Mol Cell. 2022 Dec 1;82(23):4401-4402. - PMID 36459981 |
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| Medienart: |
E-Artikel |
| Erscheinungsjahr: |
2022 |
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| Erschienen: |
2022 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:82 |
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| Enthalten in: |
Molecular cell - 82(2022), 23 vom: 01. Dez., Seite 4458-4470.e5 |
| Sprache: |
Englisch |
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| Beteiligte Personen: |
Bryson, Terri D [VerfasserIn] |
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9007-49-2 |
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Date Completed 06.12.2022 Date Revised 10.01.2023 published: Print-Electronic CommentIn: Mol Cell. 2022 Dec 1;82(23):4401-4402. - PMID 36459981 Citation Status MEDLINE |
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| doi: |
10.1016/j.molcel.2022.10.020 |
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| 520 | |a The two doublet histones of Marseillevirus are distantly related to the four eukaryotic core histones and wrap 121 base pairs of DNA to form remarkably similar nucleosomes. By permeabilizing Marseillevirus virions and performing genome-wide nuclease digestion, chemical cleavage, and mass spectrometry assays, we find that the higher-order organization of Marseillevirus chromatin fundamentally differs from that of eukaryotes. Marseillevirus nucleosomes fully protect DNA within virions as closely abutted 121-bp DNA-wrapped cores without linker DNA or phasing along genes. Likewise, we observed that nucleosomes reconstituted onto multi-copy tandem repeats of a nucleosome-positioning sequence are tightly packed. Dense promiscuous packing of fully wrapped nucleosomes rather than "beads on a string" with genic punctuation represents a distinct mode of DNA packaging by histones. We suggest that doublet histones have evolved for viral genome protection and may resemble an early stage of histone differentiation leading to the eukaryotic octameric nucleosome | ||
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| 700 | 1 | |a Henikoff, Steven |e verfasserin |4 aut | |
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