Hexasomal particles: consequence or also consequential?

Curr Opin Genet Dev. 2024 Feb 26;85:102163. doi: 10.1016/j.gde.2024.102163. Online ahead of print.ABSTRACTIt 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.\.PMID:38412564 | DOI:10.1016/j.gde.2024.102163

Source: Current Opinion in Genetics and Development - February 27, 2024 Category: Genetics & Stem Cells Authors: Upneet Kaur Elise N Mu ñoz Geeta J Narlikar Source Type: research