A slow transcription rate causes embryonic lethality and perturbs kinetic coupling of neuronal genes

Magdalena M Maslon, Ulrich Braunschweig, Stuart Aitken, Abigail R Mann, Fiona Kilanowski, Chris J Hunter, Benjamin J. Blencowe, Alberto R Kornblihtt, Ian R Adams, Javier F Caceres

Research output: Contribution to journalArticlepeer-review

Abstract

The rate of RNA polymerase II (RNAPII) elongation has an important role in the control of alternative splicing (AS); however, the in vivo consequences of an altered elongation rate are unknown. Here, we generated mouse embryonic stem cells (ESCs) knocked in for a slow elongating form of RNAPII. We show that a reduced transcriptional elongation rate results in early embryonic lethality in mice. Focusing on neuronal differentiation as a model, we observed that slow elongation impairs development of the neural lineage from ESCs, which is accompanied by changes in AS and in gene expression along this pathway. In particular, we found a crucial role for RNAPII elongation rate in transcription and splicing of long neuronal genes involved in synapse signaling. The impact of the kinetic coupling of RNAPII elongation rate with AS is greater in ESC‐differentiated neurons than in pluripotent cells. Our results demonstrate the requirement for an appropriate transcriptional elongation rate to ensure proper gene expression and to regulate AS during development.
Original languageEnglish
Article numbere101244
Number of pages18
JournalEMBO Journal
Volume38
Issue number9
Early online date15 Apr 2019
DOIs
Publication statusPublished - 2 May 2019

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