{"id":141085,"date":"2026-01-12T17:59:32","date_gmt":"2026-01-12T17:59:32","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/caracterizacion-del-eif-4f-de-embriones-de-drosophila-melanogaster-y-su-implicacion-en-la-regulacion-de-la-traduccion-que-se-establece-en-respuesta-al-estres-termico\/"},"modified":"2026-01-12T17:59:32","modified_gmt":"2026-01-12T17:59:32","slug":"caracterizacion-del-eif-4f-de-embriones-de-drosophila-melanogaster-y-su-implicacion-en-la-regulacion-de-la-traduccion-que-se-establece-en-respuesta-al-estres-termico","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/quimica\/caracterizacion-del-eif-4f-de-embriones-de-drosophila-melanogaster-y-su-implicacion-en-la-regulacion-de-la-traduccion-que-se-establece-en-respuesta-al-estres-termico\/","title":{"rendered":"Caracterizacion del eif-4f de embriones de drosophila melanogaster y su implicacion en la regulacion de la traduccion que se establece en respuesta al estres termico."},"content":{"rendered":"<h2>Tesis doctoral de <strong> Juan  Manuel Zapata Hernandez <\/strong><\/h2>\n<p>Se ha purificado y caracterizado por vez primera el factor de iniciacion (eif-) 4f de embriones de drosophila melanogaster, que esta compuesto por la 35-kda cbp (eif-4e) y otro polipeptido de mr-200.000. Aunque este factor no posee actividad atpasica dependiente de rna, se ha detectado esta actividad en fracciones de eif-4f parcialmente purificadas. Se ha estudiado la implicacion del eif-4f y del eif-4e libre en la regulacion de la traduccion que se establece en drosophila en respuesta el choque termico habiendose puesto de manifiesto que en esta situacion fisiologica el eif-4f es inactivado, probablemente por su asociacion a algun organulo subcelular. Esta inactivacion del eif-4f es la responsable del mecanismo de discriminacion de mensajeros que se observa durante el choque termico en drosophila, ya que los mrnas de choque termico (en particular el de la hasp70 y con la expcecion del de hsp83) no requieren de eif-4f para su traduccion. Asi mismo, se han obtenido evidencias que sugieren que la modulacion del estado de fosforilacion de la p200, componente del eif-4f de drosophila puede estar implicada en la regulacion de este factor.<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>Caracterizacion del eif-4f de embriones de drosophila melanogaster y su implicacion en la regulacion de la traduccion que se establece en respuesta al estres termico.<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 Caracterizacion del eif-4f de embriones de drosophila melanogaster y su implicacion en la regulacion de la traduccion que se establece en respuesta al estres termico. <\/li>\n<li><strong>Autor:<\/strong>\u00a0 Juan  Manuel Zapata Hernandez <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 Aut\u00f3noma de Madrid<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 01\/01\/1992<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<h3>Direcci\u00f3n y tribunal<\/h3>\n<ul>\n<li><strong>Director de la tesis<\/strong>\n<ul>\n<li> Sierra Perez Jos\u00e9 Manuel<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tribunal<\/strong>\n<ul>\n<li>Presidente del tribunal: Rafael Sentandreu Ramon <\/li>\n<li>Margarita Cervera Jover (vocal)<\/li>\n<li> De Frutos Y Llan Rosa (vocal)<\/li>\n<li>Matilde Salinas Aracil (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de Juan Manuel Zapata Hernandez Se ha purificado y caracterizado por vez primera el factor de iniciacion (eif-) [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center 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