Tchurikov NA, Klushevskaya ES, Kravatsky YV, Kravatskaya GI, Fedoseeva DM, Kretova OV. Interchromosomal Contacts of rDNA Clusters with DUX Genes in Human Chromosome 4 Are Very Sensitive to Heat Shock Treatment.
DOKL BIOCHEM BIOPHYS 2020;
490:50-53. [PMID:
32342314 DOI:
10.1134/s1607672920010032]
[Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2019] [Revised: 10/14/2019] [Accepted: 10/14/2019] [Indexed: 01/02/2023]
Abstract
In order to study the effects of heat shock treatment on the distribution of rDNA contacts at the region possessing DUX genes inside chromosome 4 we used 4C approach. Our data indicate that the treatment removes the frequent rDNA contacts in this region. The recent data on involvement of superenhancers that are decorated by broad H3K27ac marks in the phase separation mechanisms and the previous data demonstrating that these broad marks are the favorite sites of rDNA contacts taken together with our data on sensitivity of the contacts to the heat shock treatment suggest that the phase separation mechanisms are involved in the reversible rDNA-mediated regulation of gene expression via the contacts.
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