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Artículo

Biomolecular Condensation of the Human Papillomavirus E2 Master Regulator with p53: Implications in Viral Replication

Borkosky, Silvia SusanaIcon ; Fassolari, MarisolIcon ; Campos León, Karen; Rossi, Andrés HugoIcon ; Salgueiro, MarianoIcon ; Pascuale, Carla AntonelaIcon ; Martínez, Ramón Peralta; Gaston, Kevin; de Prat Gay, GonzaloIcon
Fecha de publicación: 11/2022
Editorial: Academic Press Ltd - Elsevier Science Ltd
Revista: Journal of Molecular Biology
ISSN: 0022-2836
Idioma: Inglés
Tipo de recurso: Artículo publicado
Clasificación temática:
Bioquímica y Biología Molecular

Resumen

p53 exerts its tumour suppressor activity by modulating hundreds of genes and it can also repress viral replication. Such is the case of human papillomavirus (HPV) through targeting the E2 master regulator, but the biochemical mechanism is not known. We show that the C-terminal DNA binding domain of HPV16 E2 protein (E2C) triggers heterotypic condensation with p53 at a precise 2/1 E2C/p53 stoichiometry at the onset for demixing, yielding large regular spherical droplets that increase in size with E2C concentration. Interestingly, transfection experiments show that E2 co-localizes with p53 in the nucleus with a grainy pattern, and recruits p53 to chromatin-associated foci, a function independent of the DNA binding capacity of p53 as judged by a DNA binding impaired mutant. Depending on the length, DNA can either completely dissolve or reshape heterotypic droplets into irregular condensates containing p53, E2C, and DNA, and reminiscent of that observed linked to chromatin. We propose that p53 is a scaffold for condensation in line with its structural and functional features, in particular as a promiscuous hub that binds multiple cellular proteins. E2 appears as both client and modulator, likely based on its homodimeric DNA binding nature. Our results, in line with the known role of condensation in eukaryotic gene enhancement and silencing, point at biomolecular condensation of E2 with p53 as a means to modulate HPV gene function, strictly dependent on host cell replication and transcription machinery.
Palabras clave: E2 DNA BINDING DOMAIN , HUMAN PAPILLOMAVIRUS , LLPS , P53 , VIRAL PROTEIN
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info:eu-repo/semantics/restrictedAccess Excepto donde se diga explícitamente, este item se publica bajo la siguiente descripción: Creative Commons Attribution-NonCommercial-ShareAlike 2.5 Unported (CC BY-NC-SA 2.5)
Identificadores
URI: http://hdl.handle.net/11336/203069
DOI: http://dx.doi.org/10.1016/j.jmb.2022.167889
URL: https://www.sciencedirect.com/science/article/pii/S0022283622005095?via%3Dihub
Colecciones
Articulos(IIBBA)
Articulos de INST.DE INVEST.BIOQUIMICAS DE BS.AS(I)
Articulos(INBIOTEC)
Articulos de INSTITUTO DE INV. EN BIODIVERSIDAD Y BIOTECNOLOGIA
Citación
Borkosky, Silvia Susana; Fassolari, Marisol; Campos León, Karen; Rossi, Andrés Hugo; Salgueiro, Mariano; et al.; Biomolecular Condensation of the Human Papillomavirus E2 Master Regulator with p53: Implications in Viral Replication; Academic Press Ltd - Elsevier Science Ltd; Journal of Molecular Biology; 11-2022
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