Artículo
Topoisomerase IIα represses transcription by enforcing promoter-proximal pausing
Autor/es | Herrero Ruiz, Andrés M.
Martínez García, Pedro Manuel Terrón Bautista, José Millán Zambrano, Gonzalo Lieberman, Jenna Ariel Jimeno González, Silvia Cortés Ledesma, Felipe |
Departamento | Universidad de Sevilla. Departamento de Genética |
Fecha de publicación | 2021 |
Fecha de depósito | 2022-03-08 |
Publicado en |
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Resumen | Accumulation of topological stress in the form of DNA supercoiling is inherent to the advance of RNA polymerase II (Pol II) and needs to be resolved by DNA topoisomerases to sustain productive transcriptional elongation. ... Accumulation of topological stress in the form of DNA supercoiling is inherent to the advance of RNA polymerase II (Pol II) and needs to be resolved by DNA topoisomerases to sustain productive transcriptional elongation. Topoisomerases are therefore considered positive facilitators of transcription. Here, we show that, in contrast to this general assumption, human topoisomerase IIα (TOP2A) activity at promoters represses transcription of immediate early genes such as c-FOS, maintaining them under basal repressed conditions. Thus, TOP2A inhibition creates a particular topological context that results in rapid release from promoter-proximal pausing and transcriptional upregulation, which mimics the typical bursting behavior of these genes in response to physiological stimulus. We therefore describe the control of promoter-proximal pausing by TOP2A as a layer for the regulation of gene expression, which can act as a molecular switch to rapidly activate transcription, possibly by regulating the accumulation of DNA supercoiling at promoter regions. |
Agencias financiadoras | Ministerio de Ciencia, Innovación y Universidades (MICINN). España European Commission (EC). Fondo Europeo de Desarrollo Regional (FEDER) Junta de Andalucía |
Identificador del proyecto | SAF2017-89619-R
P11-CVI-7948 |
Cita | Herrero Ruiz, A.M., Martínez García, P.M., Terrón Bautista, J., Millán Zambrano, G., Lieberman, J.A., Jimeno González, S. y Cortés Ledesma, F. (2021). Topoisomerase IIα represses transcription by enforcing promoter-proximal pausing. Cell Reports, 35 (2), 108977. |
Ficheros | Tamaño | Formato | Ver | Descripción |
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10.1016_j.celrep.2021.108977.pdf | 3.268Mb | [PDF] | Ver/ | |