One signal stimulates different transcriptional activation mechanisms.

Autor: Mazina MY; Group of Transcriptional Complexes Dynamics, Institute of Gene Biology, Russian Academy of Sciences, Moscow 119334, Russia., Kovalenko EV; Group of Transcriptional Complexes Dynamics, Institute of Gene Biology, Russian Academy of Sciences, Moscow 119334, Russia., Derevyanko PK; Group of Transcriptional Complexes Dynamics, Institute of Gene Biology, Russian Academy of Sciences, Moscow 119334, Russia., Nikolenko JV; Group of Studying an Association of Transcription and mRNA Transport, Institute of Gene Biology, Russian Academy of Sciences, Moscow 119334, Russia., Krasnov AN; Group of Studying an Association of Transcription and mRNA Transport, Institute of Gene Biology, Russian Academy of Sciences, Moscow 119334, Russia., Vorobyeva NE; Group of Transcriptional Complexes Dynamics, Institute of Gene Biology, Russian Academy of Sciences, Moscow 119334, Russia. Electronic address: vorobyeva@genebiology.ru.
Jazyk: angličtina
Zdroj: Biochimica et biophysica acta. Gene regulatory mechanisms [Biochim Biophys Acta Gene Regul Mech] 2018 Feb; Vol. 1861 (2), pp. 178-189. Date of Electronic Publication: 2018 Feb 06.
DOI: 10.1016/j.bbagrm.2018.01.016
Abstrakt: Transcriptional activation is often represented as a "one-step process" that involves the simultaneous recruitment of co-activator proteins, leading to a change in gene status. Using Drosophila developmental ecdysone-dependent genes as a model, we demonstrated that activation of transcription is instead a continuous process that consists of a number of steps at which different phases of transcription (initiation or elongation) are stimulated. Thorough evaluation of the behaviour of multiple transcriptional complexes during the early activation process has shown that the pathways by which activation proceeds for different genes may vary considerably, even in response to the same induction signal. RNA polymerase II recruitment is an important step that is involved in one of the pathways. RNA polymerase II recruitment is accompanied by the recruitment of a significant number of transcriptional coactivators as well as slight changes in the chromatin structure. The second pathway involves the stimulation of transcriptional elongation as its key step. The level of coactivator binding to the promoter shows almost no increase, whereas chromatin modification levels change significantly.
(Copyright © 2018 Elsevier B.V. All rights reserved.)
Databáze: MEDLINE
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