Hexasomal particles: consequence or also consequential?

Hexasomal particles: consequence or also consequential?

It is long known that an RNA polymerase transcribing through a nucleosome can generate subnucleosomal particles called hexasomes. These particles lack an H2A–H2B dimer, breaking the symmetry of a nucleosome and revealing new interfaces. Whether hexasomes are simply a consequence of RNA polymerase ac...

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Veröffentlicht in:Current opinion in genetics & development 2024-04, Vol.85, p.102163, Article 102163
Hauptverfasser: Kaur, Upneet, Muñoz, Elise N, Narlikar, Geeta J
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Sprache:eng
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Chromatin - genetics
DNA-Directed RNA Polymerases - genetics
Nucleosomes - genetics
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Muñoz, Elise N
Narlikar, Geeta J
description It is long known that an RNA polymerase transcribing through a nucleosome can generate subnucleosomal particles called hexasomes. These particles lack an H2A–H2B dimer, breaking the symmetry of a nucleosome and revealing new interfaces. Whether hexasomes are simply a consequence of RNA polymerase action or they also have a regulatory impact remains an open question. Recent biochemical and structural studies of RNA polymerases and chromatin remodelers with hexasomes motivated us to revisit this question. Here, we build on previous models to discuss how formation of hexasomes can allow sophisticated regulation of transcription and also significantly impact chromatin folding. We anticipate that further cellular and biochemical analysis of these subnucleosomal particles will uncover additional regulatory roles.
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subjects Chromatin - genetics
DNA-Directed RNA Polymerases - genetics
Nucleosomes - genetics
title Hexasomal particles: consequence or also consequential?
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