{"id":3929,"date":"1994-01-01T00:00:00","date_gmt":"1994-01-01T00:00:00","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/1994\/01\/01\/caracterizacion-molecular-y-expresion-de-los-genes-de-cebada-iat1-iat2-e-iat3-que-codifican-las-subunidades-del-inhibidor-tetramerico-de-alfa-amilasa\/"},"modified":"1994-01-01T00:00:00","modified_gmt":"1994-01-01T00:00:00","slug":"caracterizacion-molecular-y-expresion-de-los-genes-de-cebada-iat1-iat2-e-iat3-que-codifican-las-subunidades-del-inhibidor-tetramerico-de-alfa-amilasa","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/quimica\/caracterizacion-molecular-y-expresion-de-los-genes-de-cebada-iat1-iat2-e-iat3-que-codifican-las-subunidades-del-inhibidor-tetramerico-de-alfa-amilasa\/","title":{"rendered":"Caracterizacion molecular y expresion de los genes de cebada iat1, iat2 e iat3 que codifican las subunidades del inhibidor tetramerico de alfa-amilasa"},"content":{"rendered":"<h2>Tesis doctoral de <strong> Joaquin Medina Alcazar <\/strong><\/h2>\n<p>Se han caracterizado clones cdna de endospermo de cebada correspondientes a las proteinas btai-cma, btai-cmb y btai-cmd, componentes del inhibidor tetramerico de alfa-amilasas heterologas. La secuencia deducida para la proteina madura esta precedida siempre de un peptido se\u00f1al de 25-26 aminoacidos. Se han obtenido por pcr las zonas promotoras de los genes correspondientes iat1, iat2 e iat3 habiendose localizado en ellos ademas de motivos tata y cacaca, posibles zonas de union por activadores tipo gcn4 y myb. Los genes no tienen intrones.  se han cuantificado los mrnas en distintos tejidos y en mutantes altos en lisina derivados del cv. Sultan, habiendose detectado la expresion coordinada de estos en el endospermo en desarrollo (maximo  18 dias despues de polinizacion). Tambien se detectan bajos niveles en coleoptilos y raices para iat1, no viendose afectados estos por tratamientos con acidos salicilico y abscisico, mientras que 50  m jasmonico inhibe esta expresion. En el mutante 1242, los niveles estacionarios de mrna de iat1, iat2 e iat3 son  20% de los encontrados en el cv. Salvaje sultan del que deriva, como no se han detectado ni alteraciones en el n de copias, ni reestructuraciones mayores en los genes estructurales ni en sus promotores, un factor transcripcional alterado o silenciado durante el proceso de multagenesis pudiera ser la causa de esta menor expresion en el mutante.<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>Caracterizacion molecular y expresion de los genes de cebada iat1, iat2 e iat3 que codifican las subunidades del inhibidor tetramerico de alfa-amilasa<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 Caracterizacion molecular y expresion de los genes de cebada iat1, iat2 e iat3 que codifican las subunidades del inhibidor tetramerico de alfa-amilasa <\/li>\n<li><strong>Autor:<\/strong>\u00a0 Joaquin Medina Alcazar <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 Polit\u00e9cnica de Madrid<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 01\/01\/1994<\/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>Pilar Carbonero Zalduegui<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tribunal<\/strong>\n<ul>\n<li>Presidente del tribunal: Francisco Garcia Olmedo <\/li>\n<li>Antonio Leyva Tejada (vocal)<\/li>\n<li>Javier Paz-ares Rodriguez (vocal)<\/li>\n<li>Esther Ferrer Cebri\u00e1n (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de Joaquin Medina Alcazar Se han caracterizado clones cdna de endospermo de cebada correspondientes a las proteinas btai-cma, [&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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