{"id":86830,"date":"2000-06-10T00:00:00","date_gmt":"2000-06-10T00:00:00","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/caracterizacion-de-la-region-reguladora-sos-en-el-grupo-alfa-de-las-proteobacterias\/"},"modified":"2000-06-10T00:00:00","modified_gmt":"2000-06-10T00:00:00","slug":"caracterizacion-de-la-region-reguladora-sos-en-el-grupo-alfa-de-las-proteobacterias","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/ciencias-de-la-vida\/caracterizacion-de-la-region-reguladora-sos-en-el-grupo-alfa-de-las-proteobacterias\/","title":{"rendered":"\u00abcaracterizaci\u00f3n de la regi\u00f3n reguladora sos en el grupo alfa de las proteobacterias\u00bb"},"content":{"rendered":"<h2>Tesis doctoral de <strong> Angels Tapias Ribot <\/strong><\/h2>\n<p>La construcci\u00f3n de fusiones transcripcionales con el gen reca y su analisis en los distintos miembros de la familia rhizobiaceae ha permitido establecer la existencia de una regulaci\u00f3n interespec\u00edfica, lo que a nivel funcional significa la presencia en dicha familia de una v\u00eda reguladora com\u00fan para este gen. Tras determinar este punto, se abord\u00f3 la caracterizaci\u00f3n molecular del motivo regulador del gen rec a de rhizobium etli, que hemos demostrado que corresponde a la secuencia gaac-n7-gtac. Sin embargo, y para poder afirmar que tal secuencia era la caja sos, era necesario disponer de otros genes pertenecientes al sistema sos de estos microorganismos. Para ello, y mediante experimentos de complementaci\u00f3n con cepas mutantes se aisl\u00f3 el gen uvra de sinorhizobium meliloti. Adyacente a este gen, pero con el sentido de transcripci\u00f3n opuesto, se detect\u00f3 la presencia del gen ssb. el an\u00e1lisis de la regi\u00f3n promotora de los dos genes nos permiti\u00f3 determinar que ambos eran inducibles por lesiones en el dna y que dicha inducibilidad depend\u00eda del motivo gttc-t7-gttc que es la secuencia reversa y complementaria de la que, como ya seha comentado, controla el gen reca(gaac-n7-gtac). el analisis comparativo de los promotores sos de diferentes miembros de la clase alfa de las proteobacterias, grupo taxon\u00f3mico al que pertenece la familia rhizobiaceae, ha revelado que su caja sos es la repetici\u00f3n directa gttc-yyktttt-gttc, siendo este el primer caso conocido en que el motivo regulador sos no es de naturaleza palindr\u00f3mica.  as\u00ed mismo, se ha clonado el gen lexa de r.Sphaeroides para proceder a su an\u00e1lisis. La construcci\u00f3n de una cepa mutante deficiente en este gen, ha demostrado inequ\u00edvocamente que su producto, la prote\u00edna lexa, es el represor del sistema sos y que la organizaci\u00f3n de este presenta caracter\u00edsticas diferentes importantes en comparaci\u00f3n con el de otros microorganismos caracterizados previamente. Finalmente, se ha purifica<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>\u00abcaracterizaci\u00f3n de la regi\u00f3n reguladora sos en el grupo alfa de las proteobacterias\u00bb<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 \u00abcaracterizaci\u00f3n de la regi\u00f3n reguladora sos en el grupo alfa de las proteobacterias\u00bb <\/li>\n<li><strong>Autor:<\/strong>\u00a0 Angels Tapias Ribot <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 Aut\u00f3noma de barcelona<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 06\/10\/2000<\/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>Jordi Barb\u00e9 Garc\u00eda<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tribunal<\/strong>\n<ul>\n<li>Presidente del tribunal: ernesto Garcia <\/li>\n<li>Carlos Alonso Juan (vocal)<\/li>\n<li>antoni Juarez (vocal)<\/li>\n<li>Miguel Regue (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de Angels Tapias Ribot La construcci\u00f3n de fusiones transcripcionales con el gen reca y su analisis en los [&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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