{"id":18314,"date":"2002-11-07T00:00:00","date_gmt":"2002-11-07T00:00:00","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/estudio-de-la-ruta-catabolica-del-estireno-de-pseudomonas-sp-y2\/"},"modified":"2002-11-07T00:00:00","modified_gmt":"2002-11-07T00:00:00","slug":"estudio-de-la-ruta-catabolica-del-estireno-de-pseudomonas-sp-y2","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/ciencias-de-la-vida\/estudio-de-la-ruta-catabolica-del-estireno-de-pseudomonas-sp-y2\/","title":{"rendered":"Estudio de la ruta catab\u00f3lica del estireno de pseudomonas sp. y2"},"content":{"rendered":"<h2>Tesis doctoral de <strong> Sergio Alonso Utrilla <\/strong><\/h2>\n<p>El estireno es uno de los compuestos arom\u00e1ticos de mayor uso industrial, lo que supone un importante riesgo de contaminaci\u00f3n medioambiental. Algunos microorganismos, como pseudomonas sp.Y2, son capaces de mineralizar este compuesto generando exclusivamente co2 como producto final. Este trabajo se centra en el aislamiento y caracterizaci\u00f3n de los genes responsables de la degradaci\u00f3n del estireno de pseudomonas sp.Y2. Para ello se ha realizado una librer\u00eda gen\u00e9tica del cromosoma de esta bacteria en un vector plasm\u00eddico, de la que se a obtenido un clon que alberga un pl\u00e1smido que contiene todos los genes implicados en los primeros pasos de la degradaci\u00f3n del estireno. la secuenciaci\u00f3n de los 15560 pb de bases que constituyen el inserto de este pl\u00e1smido, y el an\u00e1lisis de la secuencia obtenida con programas inform\u00e1ticos especializados, ha permitido definir la existencia de cuatro genes catab\u00f3licos, styabcd, que codifican tres actividades enzim\u00e1ticas responsables de la oxidaci\u00f3n secuencial del estireno, generando expoxiestireno, fenilacetaldeh\u00eddo y finalmente \u00e1cido fenilac\u00e9tico. Los experimentos realizados han confirmado la funcionalidad de estas actividades enzim\u00e1ticas tanto en pseudomonas sp.Y2 como en otros microorganismos, a los que dota de la capacidad de eliminar este contaminante. Se ha estudiado en profundidad el sistema que regula la transcripci\u00f3n de los genes styabcd, codificado en dos genes, stysr, que conforman un sistema de dos componentes en el que stys es el encargado de detectar la presencia de estireno y de transferir la se\u00f1al, mediante la fosforilaci\u00f3n de un residuo espec\u00edfico, a styr. Esta \u00faltima prote\u00edna es un regulador transcripcional que interacciona directamente con el promotor de los genes estructurales, activando su expresi\u00f3n. El conocimiento obtenido en este trabajo ha permitido la construcci\u00f3n de estirpes modificadas de pseudomonas sp.Y2 que permiten valorar la presencia de agentes contaminan<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>Estudio de la ruta catab\u00f3lica del estireno de pseudomonas sp. y2<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 Estudio de la ruta catab\u00f3lica del estireno de pseudomonas sp. y2 <\/li>\n<li><strong>Autor:<\/strong>\u00a0 Sergio Alonso Utrilla <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 Complutense de Madrid<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 11\/07\/2002<\/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>Julian Perera Gonzalez<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tribunal<\/strong>\n<ul>\n<li>Presidente del tribunal: Antonio Tormo garrido <\/li>\n<li>Jos\u00e9 Luis Garcia lopez (vocal)<\/li>\n<li>Juan  Luis Ramos martin (vocal)<\/li>\n<li>eduardo Diaz fern\u00e1ndez (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de Sergio Alonso Utrilla El estireno es uno de los compuestos arom\u00e1ticos de mayor uso industrial, lo 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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