Home > Articles > Published articles > The TRPV4 channel links calcium influx to DDX3X activity and viral infectivity |
Date: | 2018 |
Abstract: | Ion channels are well placed to transduce environmental cues into signals used by cells to generate a wide range of responses, but little is known about their role in the regulation of RNA metabolism. Here we show that the TRPV4 cation channel binds the DEAD-box RNA helicase DDX3X and regulates its function. TRPV4-mediated Ca2+ influx releases DDX3X from the channel and drives DDX3X nuclear translocation, a process that involves calmodulin (CaM) and the CaM-dependent kinase II. Genetic depletion or pharmacological inhibition of TRPV4 diminishes DDX3X-dependent functions, including nuclear viral export and translation. Furthermore, TRPV4 mediates Ca2+ influx and nuclear accumulation of DDX3X in cells exposed to the Zika virus or the purified viral envelope protein. Consequently, targeting of TRPV4 reduces infectivity of dengue, hepatitis C and Zika viruses. Together, our results highlight the role of TRPV4 in the regulation of DDX3X-dependent control of RNA metabolism and viral infectivity. |
Grants: | Ministerio de Economía y Competitividad SAF2015-69762R Agencia Estatal de Investigación BFU2016-80039-R Agencia Estatal de Investigación BFU2017-87843-R Ministerio de Economía y Competitividad MDM-2014-0370 European Commission 237120 Agència de Gestió d'Ajuts Universitaris i de Recerca 2014/SGR-1628 Agència de Gestió d'Ajuts Universitaris i de Recerca FI-2013FIB00251 |
Rights: | Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original. |
Language: | Anglès |
Document: | Article ; recerca ; Versió publicada |
Subject: | Ion channel signalling ; Viral infection |
Published in: | Nature communications, Vol. 9 (June 2018) , art. 2307, ISSN 2041-1723 |
13 p, 3.6 MB |