{"id":38990,"date":"2018-03-09T09:38:51","date_gmt":"2018-03-09T09:38:51","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/caracterizacion-y-expresion-del-gen-que-codifica-para-la-proteina-factor-5-del-inicio-de-la-traduccion-en-eucariotas-eif-5-en-zea-mays\/"},"modified":"2018-03-09T09:38:51","modified_gmt":"2018-03-09T09:38:51","slug":"caracterizacion-y-expresion-del-gen-que-codifica-para-la-proteina-factor-5-del-inicio-de-la-traduccion-en-eucariotas-eif-5-en-zea-mays","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/ciencias-de-la-vida\/caracterizacion-y-expresion-del-gen-que-codifica-para-la-proteina-factor-5-del-inicio-de-la-traduccion-en-eucariotas-eif-5-en-zea-mays\/","title":{"rendered":"Caracterizacion y expresion del gen que codifica para la proteina factor 5 del inicio de la traduccion en eucariotas (eif-5) en zea mays-"},"content":{"rendered":"<h2>Tesis doctoral de <strong> Ignacio Lopez Ribera <\/strong><\/h2>\n<p>Se ha aislado y secuenciado el cdna y la regi\u00f3n gen\u00f3mica del gen que codifica para la proteina factor 5 del inicio de la traducci\u00f3n en eucariotas (eif-5)en zea mays. Las 1975 pares de bases del cdna codifican una proteina de 451 aminoacidos cuya secuencia contiene un dominio dedo de zinc. Por analisis de hibridaci\u00f3n de filtros a los que se les habia transferido dna se ha comprobado la existencia de una copia \u00fanica de este gen en el genoma de maiz y por analisis de rflp se ha mapeado un unico locus en el brazo largo del cromosoma 4 de maiz. Se han secuenciado 7 kilo bases de la regi\u00f3n gen\u00f3mica, del analisis y caracterizaci\u00f3n de estate deduce la existencia de numerosos elementos repetitivos en las regiones intergenicas y de un largo intr\u00f3n de 1300 pares de bases en la region 5\u00c2\u00bfno codificante. Aunque se trata de un gen constitutivo, de los estudios de expresi\u00f3n realizados por hibridacion de filtros a los que se les habia tranferido rna poli a+ y de hibridaci\u00f3n in situ sobre tejidos, se deduce que la acumulaci\u00f3n de rna mensajero de este gen est\u00e1 ligada a procesos de division celular, detectandose la mayor expresi\u00f3n en regiones meristem\u00e1ticas. De los estudios de similitud realizados con otras proteinas eif-5 de otros organismos se constata lo extremadamente conservada que se encuentra la region n-terminal de la proteina. En esta region se encuentra el dominio dedo de zn. Del conocimiento de la funci\u00f3n de la proteina eif-5 en la etapa 5\u00aa de la fase de iniciaci\u00f3n de la sintesis de proteinas se deducia su posible interacci\u00f3n con la subunidad ribosomica 40s. Se obtuvo proteina de maiz por transcripci\u00f3n y traducci\u00f3n in vitro y se realizaron estudios de uni\u00f3n de la proteina a polimeros de dna de cadena sencilla y de poli u los cuales demostraron la dependencia del ion zn para la uni\u00f3n de la proteina. Se propone que el dominio dedo de zn y las regiones conservadas del extremo n-terminalson las responsables de la interacci\u00f3n de<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>Caracterizacion y expresion del gen que codifica para la proteina factor 5 del inicio de la traduccion en eucariotas (eif-5) en zea mays-<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 Caracterizacion y expresion del gen que codifica para la proteina factor 5 del inicio de la traduccion en eucariotas (eif-5) en zea mays- <\/li>\n<li><strong>Autor:<\/strong>\u00a0 Ignacio Lopez Ribera <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 Barcelona<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 17\/12\/1998<\/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>Pere Puigdomenech Rosell<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tribunal<\/strong>\n<ul>\n<li>Presidente del tribunal: alfredo Ruiz panadero <\/li>\n<li>dolors Ludevid m\u00fagica (vocal)<\/li>\n<li>ferran Azorin marin (vocal)<\/li>\n<li>paulino Mart\u00ednez portela (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de Ignacio Lopez Ribera Se ha aislado y secuenciado el cdna y la regi\u00f3n gen\u00f3mica del gen que [&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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