{"id":134548,"date":"1997-01-01T00:00:00","date_gmt":"1997-01-01T00:00:00","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/organizacion-y-reorganizacion-del-adn-y-cromatina-macronuclear-durante-el-proceso-de-enquistamiento-en-colpoda-inflata\/"},"modified":"1997-01-01T00:00:00","modified_gmt":"1997-01-01T00:00:00","slug":"organizacion-y-reorganizacion-del-adn-y-cromatina-macronuclear-durante-el-proceso-de-enquistamiento-en-colpoda-inflata","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/ciencias-de-la-vida\/organizacion-y-reorganizacion-del-adn-y-cromatina-macronuclear-durante-el-proceso-de-enquistamiento-en-colpoda-inflata\/","title":{"rendered":"Organizacion y reorganizacion del adn y cromatina macronuclear durante el proceso de enquistamiento en colpoda inflata."},"content":{"rendered":"<h2>Tesis doctoral de <strong> Gemma Palacios Hernandez <\/strong><\/h2>\n<p>El estudio de este proceso de diferenciacion celular (enquistamiento), fue abordado a distintos niveles: 1- naturaleza del adn macronuclear vegetativo y quistico, por electroforesis convencional y electroforesis de campo pulsado. 2- cambios en el patron de metilacion durante el enquistamiento, utilizando endonucleasas de restriccion y el inhibidor 5-azacitidina. 3- analisis estructural del macronucleo y cromatina por microscopia electronica de transmision (tem), microscopia confocal y citometria de flujo.Con los datos obtenidos, concluimos: 1-el adn macronuclear esta organizado por moleculas de tama\u00f1o subcromosomico, solo visualizables por electroforesis de campo pulsado, donde los genes ribosomicos se localizan en una banda discreta dentro del patron electroforetico.  el patron electroforetico de colpoda inflata, es similar al de paramecium (poblacion heterogenea y continua de moleculas de amplio rango de tama\u00f1os) y se aleja del mostrado por tetrahymena sp. Sin embargo, el tama\u00f1o promedio de las moleculas macronucleares es similar al de tetrahymena.  2- el genoma macronuclear parece presentar 5-metilcitosina y no 6-metiladenina.  la desmetilacion de determinadas secuencias del adn macronuclear, supondria un mecanismo de apertura de los genes involucrados en el enquistamiento. Ademas, existiria una metilacion selectiva de genes ribosomales macronucleares.  3- la cromatina macronuclear vegetativa es de naturaleza nucleosomal y esta constituida por numerosos cuerpos discretos de cromatina condensada. Presenta un nucleolo compuesto constituido por varias masas nucleolares, que en el enquistamiento se fusionan, originando una unica masa nucleolar. Tambien en el enquistamiento se produce una perdida de adn macronuclear en forma de cuerpo de extrusion, como un mecanismo para mantener la razon nucleo\/citoplasma. Por otro lado, hemos observado fenomenos de oligotenia en la cromatina vegetativa. La cromatina macronuclear quistica e<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>Organizacion y reorganizacion del adn y cromatina macronuclear durante el proceso de enquistamiento en colpoda inflata.<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 Organizacion y reorganizacion del adn y cromatina macronuclear durante el proceso de enquistamiento en colpoda inflata. <\/li>\n<li><strong>Autor:<\/strong>\u00a0 Gemma Palacios Hernandez <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 Complutense de Madrid<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 01\/01\/1997<\/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> Gutierrez Fernandez Juan  Carlos<\/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> Perez G. Rosa M. (vocal)<\/li>\n<li>Pilar Gracia Royo (vocal)<\/li>\n<li> Ruiz Perez Luis Miguel (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de Gemma Palacios Hernandez El estudio de este proceso de diferenciacion celular (enquistamiento), fue abordado a distintos niveles: [&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":[35,986,278],"tags":[70355,22798,2604,248678,7170,18917],"class_list":["post-134548","post","type-post","status-publish","format-standard","hentry","category-ciencias-de-la-vida","category-complutense-de-madrid","category-microbiologia","tag-gemma-palacios-hernandez","tag-gutierrez-fernandez-juan-carlos","tag-jose-Martinez-peinado","tag-perez-g-rosa-m","tag-pilar-gracia-royo","tag-ruiz-perez-luis-miguel"],"_links":{"self":[{"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/posts\/134548","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=134548"}],"version-history":[{"count":0,"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/posts\/134548\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/media?parent=134548"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/categories?post=134548"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/tags?post=134548"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}