Journal article

Changes in long-range rDNA-genomic interactions associate with altered RNA polymerase II gene programs during malignant transformation.

Jeannine Diesch, Megan J Bywater, Elaine Sanij, Donald P Cameron, William Schierding, Natalie Brajanovski, Jinbae Son, Jirawas Sornkom, Nadine Hein, Maurits Evers, Richard B Pearson, Grant A McArthur, Austen RD Ganley, Justin M O'Sullivan, Ross D Hannan, Gretchen Poortinga

Communications biology | Published : 2019

Abstract

The three-dimensional organization of the genome contributes to its maintenance and regulation. While chromosomal regions associate with nucleolar ribosomal RNA genes (rDNA), the biological significance of rDNA-genome interactions and whether they are dynamically regulated during disease remain unclear. rDNA chromatin exists in multiple inactive and active states and their transition is regulated by the RNA polymerase I transcription factor UBTF. Here, using a MYC-driven lymphoma model, we demonstrate that during malignant progression the rDNA chromatin converts to the open state, which is required for tumor cell survival. Moreover, this rDNA transition co-occurs with a reorganization of rDN..

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