{"id":83383,"date":"2018-03-10T00:07:31","date_gmt":"2018-03-10T00:07:31","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/implicacion-de-un-elemento-transponible-en-la-utilizacion-de-la-lactosa-por-salmonella-virchow\/"},"modified":"2018-03-10T00:07:31","modified_gmt":"2018-03-10T00:07:31","slug":"implicacion-de-un-elemento-transponible-en-la-utilizacion-de-la-lactosa-por-salmonella-virchow","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/ciencias-de-la-vida\/implicacion-de-un-elemento-transponible-en-la-utilizacion-de-la-lactosa-por-salmonella-virchow\/","title":{"rendered":"Implicaci\u00f3n de un elemento transponible en la utilizaci\u00f3n de la lactosa por salmonella virchow"},"content":{"rendered":"<h2>Tesis doctoral de <strong>  Tamargo Fuente M. Angeles <\/strong><\/h2>\n<p>La fermentaci\u00f3n de la lactosa es un car\u00e1cter taxon\u00f3mico importante para la clasificaci\u00f3n de las enterobacterias, que se dividen tradicionalmente en dos grandes grupos, lactosa positiva y lactosa negativa. Las principales enterobacterias pat\u00f3genos(salmonella, yersinia y shigella) son lactosa negativa. En 1994 se detect\u00f3 en espa\u00f1a un brote epid\u00e9mico en ni\u00f1os menores de 6 meses causado por leche en polvo maternizada contaminada con salmonella virchow lactosa positiva. En este trabajo se parti\u00f3 de dos variente de la cepa de s. Virxhow 6132, una de ellas descrita como lactosa positiva(6132a) mientras que la otra era lactosa lenta(6132b). La capacidad de fermentaci\u00f3n de la lactosa se debe a la presencia del oper\u00f3n lac en los genomas de s. virchow 6132a y 6132b en copia \u00fanica. El fen\u00f3tipo lactosa lento se debe a la presencia de laca en ninguna de las dos variantes. La caractericaci\u00f3n de las regiones colindantes al oper\u00f3n lac en s. Virchow 6132b(14 kb) revel\u00f3 la existencia de regiones con alto porcentaje de identidad con diversas secuencias de inserci\u00f3n(is 903 b,is 1222,isois1), una transposasa(tn5708), y con genes involucrados en la ruta de bios\u00edntesis de las bases pirimid\u00ednicas. se dise\u00f1aron ensayos de transposici\u00f3n para determinar si algunas de estas secuencias de inserci\u00f3n pod\u00edan constituir una unidad funcional tipo transpos\u00f3n compuesto, o si exist\u00eda una transpos\u00f3n de m\u00e1s de 20 kb que englobase al oper\u00f3n lac. Se obtuvieron trnasconjugantes lactosa positivos que portaban el oper\u00f3n las y la secuencia de inserci\u00f3n is1222 confirmando la existencia de un elemento m\u00f3vil en s. Virchow 6132. Al elemento m\u00f3vil presente en s. Virchow 6132a se le denomin\u00f3 tnlaca y al presente en s. Virchow 6132b, tnlacb. La frecuencia de transposici\u00f3n determinada para tnlaca y tnlacb es de 1.78 x 10-5 y 2.14 x 10-5, respectivamente. Se realizaron diferentes ensayos de transposici\u00f3n utilizando varios construcciones con la intenci\u00f3n de d<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>Implicaci\u00f3n de un elemento transponible en la utilizaci\u00f3n de la lactosa por salmonella virchow<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 Implicaci\u00f3n de un elemento transponible en la utilizaci\u00f3n de la lactosa por salmonella virchow <\/li>\n<li><strong>Autor:<\/strong>\u00a0  Tamargo Fuente M. Angeles <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 Complutense de Madrid<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 16\/02\/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>Rafael Rotger Anglada<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tribunal<\/strong>\n<ul>\n<li>Presidente del tribunal: jos\u00e9 Mart\u00ednez peinado <\/li>\n<li>Jos\u00e9 Casedeus pursals (vocal)<\/li>\n<li> Usera gonzalez Miguel a. (vocal)<\/li>\n<li>Mar\u00eda  aurora Echeita sarrionandia (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de Tamargo Fuente M. Angeles La fermentaci\u00f3n de la lactosa es un car\u00e1cter taxon\u00f3mico importante para la clasificaci\u00f3n [&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 center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""}},"footnotes":""},"categories":[35,278],"tags":[176744,2604,49780,6306,176743,176745],"class_list":["post-83383","post","type-post","status-publish","format-standard","hentry","category-ciencias-de-la-vida","category-microbiologia","tag-jose-casedeus-pursals","tag-jose-Martinez-peinado","tag-maria-aurora-echeita-sarrionandia","tag-rafael-rotger-anglada","tag-tamargo-fuente-m-angeles","tag-usera-gonzalez-miguel-a"],"_links":{"self":[{"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/posts\/83383","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/comments?post=83383"}],"version-history":[{"count":0,"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/posts\/83383\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/media?parent=83383"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/categories?post=83383"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/tags?post=83383"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}