Molecular determinants of phosphatidylinositol 4,5-bisphosphate (PI(4,5)P2) binding to transient receptor potential V1 (TRPV1) channels

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dc.contributor.authorPoblete, Horacio
dc.contributor.authorOyarzún, Ingrid
dc.contributor.authorOlivero, Pablo
dc.contributor.authorComer, Jeffrey
dc.contributor.authorZuñiga, Matías
dc.contributor.authorSepulveda, Romina V.
dc.contributor.authorBáez-Nieto, David
dc.contributor.authorLeon, Carlos González
dc.contributor.authorGonzález-Nilo, Fernando
dc.contributor.authorLatorre, Ramón
dc.date.accessioned2023-07-31T15:18:47Z
dc.date.available2023-07-31T15:18:47Z
dc.date.issued2015-01
dc.descriptionIndexación: Scopuses
dc.description.abstractPhosphatidylinositol 4,5-bisphosphate (PI(4,5)P2) has been recognized as an important activator of certain transient receptor potential (TRP) channels. More specifically, TRPV1 is a pain receptor activated by a wide range of stimuli. However, whether or not PI(4,5)P2 is a TRPV1 agonist remains open to debate. Utilizing a combined approach of mutagenesis and molecular modeling, we identified a PI(4,5)P2 binding site located between the TRP box and the S4-S5 linker. At this site, PI(4,5)P2 interacts with the amino acid residues Arg-575 and Arg-579 in the S4-S5 linker and with Lys-694 in the TRP box. We confirmed that PI(4,5)P2 behaves as a channel agonist and found that Arg-575, Arg-579, and Lys-694 mutations to alanine reduce PI(4,5)P2 binding affinity. Additionally, in silico mutations R575A, R579A, and K694A showed that the reduction in binding affinity results from the delocalization of PI(4,5)P2 in the binding pocket. Molecular dynamics simulations indicate that PI(4,5)P2 binding induces conformational rearrangements of the structure formed by S6 and the TRP domain, which cause an opening of the lower TRPV1 channel gate. © 2015 by The American Society for Biochemistry and Molecular Biology, Inc.es
dc.description.urihttps://www-sciencedirect-com.recursosbiblioteca.unab.cl/science/article/pii/S002192582057748X?via%3Dihub
dc.identifier.citationJournal of Biological Chemistry Volume 290, Issue 4, Pages 2086 - 209823 January 2015es
dc.identifier.doi10.1074/jbc.M114.613620
dc.identifier.issn0021-9258
dc.identifier.urihttps://repositorio.unab.cl/xmlui/handle/ria/52102
dc.language.isoenes
dc.publisherAmerican Society for Biochemistry and Molecular Biology Inc.es
dc.rights.licenseAttribution 3.0 Unported
dc.rights.urihttps://creativecommons.org/licenses/by/3.0/legalcode
dc.titleMolecular determinants of phosphatidylinositol 4,5-bisphosphate (PI(4,5)P2) binding to transient receptor potential V1 (TRPV1) channelses
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