Journal article

Cell cycle and growth stimuli regulate different steps of RNA polymerase I transcription

Sandy S Hung, Analia Lesmana, Abigail Peck, Rachel Lee, Elly Tchoubrieva, Katherine M Hannan, Jane Lin, Karen E Sheppard, Katarzyna Jastrzebski, Leonie M Quinn, Lawrence I Rothblum, Richard B Pearson, Ross D Hannan, Elaine Sanij

GENE | ELSEVIER | Published : 2017

Abstract

Transcription of the ribosomal RNA genes (rDNA) by RNA polymerase I (Pol I) is a major control step for ribosome synthesis and is tightly linked to cellular growth. However, the question of whether this process is modulated primarily at the level of transcription initiation or elongation is controversial. Studies in markedly different cell types have identified either initiation or elongation as the major control point. In this study, we have re-examined this question in NIH3T3 fibroblasts using a combination of metabolic labeling of the 47S rRNA, chromatin immunoprecipitation analysis of Pol I and overexpression of the transcription initiation factor Rrn3. Acute manipulation of growth facto..

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Awarded by National Health and Medical Research Council (NHMRC) of Australia


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Funding Acknowledgements

This work was supported by the National Health and Medical Research Council (NHMRC) of Australia project grants (#1043884, 251608, 566702, 166908, 251688, 509087, 400116, 400120, 566876), NHMRC Program Grant (#1053792) and NIH grants GM069841 and HL077814 awarded to LIR. R.D.H. and R.B.P. were funded by NHMRC Fellowships.