{"id":26610,"date":"2018-03-09T09:18:30","date_gmt":"2018-03-09T09:18:30","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/la-descarboxilacion-del-glutamato-en-synechocystis-sp-pcc-6803-enzimas-implicadas-y-funcion-fisiologica\/"},"modified":"2018-03-09T09:18:30","modified_gmt":"2018-03-09T09:18:30","slug":"la-descarboxilacion-del-glutamato-en-synechocystis-sp-pcc-6803-enzimas-implicadas-y-funcion-fisiologica","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/sevilla\/la-descarboxilacion-del-glutamato-en-synechocystis-sp-pcc-6803-enzimas-implicadas-y-funcion-fisiologica\/","title":{"rendered":"La descarboxilaci\u00f3n del glutamato en synechocystis sp. pcc 6803: enzimas implicadas y funci\u00f3n fisiol\u00f3gica."},"content":{"rendered":"<h2>Tesis doctoral de <strong>  Lucena Soto Jos\u00e9 Manuel <\/strong><\/h2>\n<p>Las cianobacterias son procariotas fotosint\u00e9ticos que presentan la peculiaridad de tener un ciclo de krebs incompleto, al carecer de la 2-oxoglutarato deshidrogenasa. Como consecuencia, dicho ciclo se divide en dos ramas aparentemente inconexas. No obstante, es posible que existan rutas alternativas que puedan soslayar la ausencia de la 2-oxoglutarato deshidrogenasa y, de esta forma, cerrar el cliclo de krebs.  una de estas v\u00edas es la llamada ruta del y-aminobutirato (gaba), que transforma glutamato en succinato y que incluye tres enzimas: glutamato descarboxilasa, gaba transaminasa y succinato semialdehido deshidrogenasa. Para conectar esta ruta con el ciclo de krebs, el 2-oxoglutarato debe convertirse en glutamato. Este paso, asociado al metabolismo del nitr\u00f3geno, es un proceso bien estudiado en cianobacterias donde corre a cargo del ciclo gs\/gogat, bien s\u00f3lo o con el auxilio de la glutamato deshidrogenasa.  los objetivos de esta tesis han sido tanto dilucidar la existencia de la ruta del gaba en la cianobacteria heterotr\u00f3fica facultativa synechocystis sp. Pcc 6803, como determinar la funci\u00f3n fisiol\u00f3gica de la glutamato deshidrogenasa. de los estudios realizados se han obtenido los siguientes resulados:  la nadp-glutamato deshidrogenasa tiene una funci\u00f3n preferencial en la asimilaci\u00f3n de nitr\u00f3geno en las fases inicial y tard\u00eda de crecimiento de los cultivos. tambi\u00e9n se ha observado que la luz no es, per se, el factor que provoca el aumento de expresi\u00f3n del gen gdha en la fase tard\u00eda de crecimiento.  se ha confirmado la presencia de las actividades glutamato descarboxilasa y succinato semialdehido deshidrogenasa en extractos de synechocystis, si bien no se ha encontrado actividad gaba transaminasa. Como consecuencia puede excluirse la presencia de una ruta del gaba convencional que permitiese cerrar el ciclo de krebs en esta cianobacteria.  la clonaci\u00f3n del gen estructural de la glutamato descarboxilasa, gada, ha pe<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>La descarboxilaci\u00f3n del glutamato en synechocystis sp. pcc 6803: enzimas implicadas y funci\u00f3n fisiol\u00f3gica.<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 La descarboxilaci\u00f3n del glutamato en synechocystis sp. pcc 6803: enzimas implicadas y funci\u00f3n fisiol\u00f3gica. <\/li>\n<li><strong>Autor:<\/strong>\u00a0  Lucena Soto Jos\u00e9 Manuel <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 Sevilla<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 31\/10\/2003<\/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>Pedro Candau Chacon<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tribunal<\/strong>\n<ul>\n<li>Presidente del tribunal: Jes\u00fas D\u00edez dapena <\/li>\n<li>antonia Herrero moreno (vocal)<\/li>\n<li>jordi Barb\u00e9 Garc\u00eda (vocal)<\/li>\n<li>silvia Marqu\u00e9s mart\u00edn (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de Lucena Soto Jos\u00e9 Manuel Las cianobacterias son procariotas fotosint\u00e9ticos que presentan la peculiaridad de tener un ciclo [&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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