{"id":22595,"date":"2003-11-04T00:00:00","date_gmt":"2003-11-04T00:00:00","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/transferencia-de-electrones-en-la-fotosa%c2%adntesis-estudio-cristalografico-del-mecanismo-catala%c2%adtico-de-la-ferredoxina-nadp-reductasa\/"},"modified":"2003-11-04T00:00:00","modified_gmt":"2003-11-04T00:00:00","slug":"transferencia-de-electrones-en-la-fotosa%c2%adntesis-estudio-cristalografico-del-mecanismo-catala%c2%adtico-de-la-ferredoxina-nadp-reductasa","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/transferencia-de-electrones-en-la-fotosa%c2%adntesis-estudio-cristalografico-del-mecanismo-catala%c2%adtico-de-la-ferredoxina-nadp-reductasa\/","title":{"rendered":"Transferencia de electrones en la fotos\u00edntesis: estudio cristalogr\u00e1fico del mecanismo catal\u00edtico de la ferredoxina nadp+ reductasa"},"content":{"rendered":"<h2>Tesis doctoral de <strong> Tomas Mayoral Ortega <\/strong><\/h2>\n<p>La enzima ferredoxina nadp+ reductasa (fnr) cataliza la transformaci\u00f3n de la coenzima nadp+ en nadph en la \u00faltima etapa de la fotos\u00edntesis.  en la presente tesis doctoral se recoge el estudio estructural del mecanismo catal\u00edtico de la fnr desde tres aspectos diferentes:  * la uni\u00f3n de la fnr a sus donadores electr\u00f3nicos.  * el estudio del centro activo de la fnr.  * estudio de la especificidad y modo de uni\u00f3n de la coenzima nadp+.  para ello se han resuelto las estructuras tridimensionales de un total de 13 mutantes de fnr y un complejo entre fnr y nadp+, por cristalograf\u00eda de rayos x.  las estructuras han aportado informaci\u00f3n del modo de uni\u00f3n de los donadores de electrones, ferredoxina y flavodoxina, a la fnr, y del papel que ejercen las interacciones electrost\u00e1ticas e hidrof\u00f3bicas en la uni\u00f3n de los complejos entre fnr: ferredoxina y frn: flavodoxina.  se ha descrito un modelo de uni\u00f3n entre las proteinas fnr y flavodoxina en base a los diferentes estudios, bioqu\u00edmicos, estructurales, biof\u00edsicos y te\u00f3ricos existentes sobre la enzima fnr o prote\u00ednas relacionadas.  este modelo explica numerosos resultados reportados previamente.  se ha estudiado el centro activo de la enzima fnr y el papel de determinados residuos que se encuentran en la zona de estabilizaci\u00f3n del cofactor fad.  en el estudio de la especificidad por la coenzima, se ha logrado conocer las bases de la especificidad por el nadp+ o nad+ en la familia estructural de la fnr.  se ha logrado conocer el modo de uni\u00f3n de la coenzima a la fnr, por un mecanismo en tres pasos basados en la estructura del complejo fnr:nadp+.  adem\u00e1s, se ha propuesto un mecanismo para el movimiento del residuo tirosina 303 en la enzima, que hasta ahora no hab\u00eda sido descrito en ning\u00fan trabajo.<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>Transferencia de electrones en la fotos\u00edntesis: estudio cristalogr\u00e1fico del mecanismo catal\u00edtico de la ferredoxina nadp+ reductasa<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 Transferencia de electrones en la fotos\u00edntesis: estudio cristalogr\u00e1fico del mecanismo catal\u00edtico de la ferredoxina nadp+ reductasa <\/li>\n<li><strong>Autor:<\/strong>\u00a0 Tomas Mayoral Ortega <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 Aut\u00f3noma de Madrid<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 11\/04\/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>Juan Hermoso Dominguez<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tribunal<\/strong>\n<ul>\n<li>Presidente del tribunal: mart\u00edn Mart\u00ednez ripoll <\/li>\n<li>Miguel \u00e1ngel De la rosa acosta (vocal)<\/li>\n<li>milagros Medina trullenque (vocal)<\/li>\n<li>Luis Menendez arias (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de Tomas Mayoral Ortega La enzima ferredoxina nadp+ reductasa (fnr) cataliza la transformaci\u00f3n de la coenzima nadp+ en [&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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