{"id":3531,"date":"1994-01-01T00:00:00","date_gmt":"1994-01-01T00:00:00","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/1994\/01\/01\/caracterizacion-de-una-nueva-b-lactamasa-plasmidica-de-tipo-ampc\/"},"modified":"1994-01-01T00:00:00","modified_gmt":"1994-01-01T00:00:00","slug":"caracterizacion-de-una-nueva-b-lactamasa-plasmidica-de-tipo-ampc","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/quimica\/caracterizacion-de-una-nueva-b-lactamasa-plasmidica-de-tipo-ampc\/","title":{"rendered":"Caracterizacion de una nueva b-lactamasa plasmidica de tipo ampc."},"content":{"rendered":"<h2>Tesis doctoral de <strong>  Gonzalez Leiza Silvia Marina <\/strong><\/h2>\n<p>La cepa de k-pneumoniae ba32, aislada en un hospital de buenos aires, es productora de una b.Lactamasa plasmidica (fox-1) que confiere resistencia a cefalosporinas de amplio espectro y cefamicinas. El estudio cinetico de fox-1 revelo que las dos variantes moleculas de p1 6,8 y 7,2 codificadas por un plasmido de 48.5 kb tienen una mayor actividad hidrolitica sobre cefalotina y cefaloridina que sobre penicilina y cefoxitina. Fox-1 es pobremente inhibida por el acido clavulanico (ci50 mayor de 1000 nm) y sensible a cloxacilina y aztreonam (ci50=20nm y 25nm, respectivamente) el gen estructural que codifica para fox-1 posee una secuencia de 1149 pb. Que es traducida en un polipeptido de 38l amino acidos con una alta homolog\u00eda con b-lactamasas de tipo ampc codificadas por genes cromosomicos de enterobacterias y pseudomonas (55-42%).  la ausencia de una secuencia clara de reconocimiento para la peptidasa se\u00f1al podria explicar los p\/s de 6,8 y 7,2.<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>Caracterizacion de una nueva b-lactamasa plasmidica de tipo ampc.<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 Caracterizacion de una nueva b-lactamasa plasmidica de tipo ampc. <\/li>\n<li><strong>Autor:<\/strong>\u00a0  Gonzalez Leiza Silvia Marina <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 Aut\u00f3noma 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>Fernando Baquero Mochales<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tribunal<\/strong>\n<ul>\n<li>Presidente del tribunal: Juan  Evaristo Suarez Fernandez <\/li>\n<li>Joaquin Martinez Suarez (vocal)<\/li>\n<li>Juan Garc\u00eda Lobo (vocal)<\/li>\n<li>Ricardo Amils Pibernat (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de Gonzalez Leiza Silvia Marina La cepa de k-pneumoniae ba32, aislada en un hospital de buenos aires, es [&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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