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Drosophila rDNA Genes Shape the Stable Contacts with the Tlk Gene at the Expression Area of Small RNAs and Affect on Looped Domains inside the Gene
Ist Teil von
Molecular biology (New York), 2020-05, Vol.54 (3), p.391-395
Ort / Verlag
Moscow: Pleiades Publishing
Erscheinungsjahr
2020
Quelle
Alma/SFX Local Collection
Beschreibungen/Notizen
In experiments on mouse and human cells it was demonstrated that rDNA plays an important role in epigenetic regulation of many genes. To identify and study rDNA-contacting genes in
Drosophila
we used the 4С (circular chromosome conformation capture) approach. We detected very stable contacts of rDNA genes within a 5-kb region inside the
Tlk
gene residing in X chromosome. This 5-kb region corresponds to small RNAs. After heat shock treatment both the amount of contacts, and the expression level of the gene were increased.
Tlk
and
Rala
are genes that share the same short bidirectional promoter but exhibit different expression levels. Around the region of rDNA contacts inside the
Tlk
gene, looped domains were formed. We conclude that rDNA contact-dependent epigenetic regulation is guided by small RNAs and that the contacts are involved in rearrangements of the looped domains.