{"id":137189,"date":"2026-01-12T17:03:37","date_gmt":"2026-01-12T17:03:37","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/el-sistema-beta-glucosidasa-de-streptomyces-sp-qm-b814-proteinas-y-genes\/"},"modified":"2026-01-12T17:03:37","modified_gmt":"2026-01-12T17:03:37","slug":"el-sistema-beta-glucosidasa-de-streptomyces-sp-qm-b814-proteinas-y-genes","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/quimica\/el-sistema-beta-glucosidasa-de-streptomyces-sp-qm-b814-proteinas-y-genes\/","title":{"rendered":"El sistema beta-glucosidasa de streptomyces sp. qm-b814: proteinas y genes."},"content":{"rendered":"<h2>Tesis doctoral de <strong>  Perez Pons Josep Antoni <\/strong><\/h2>\n<p>Las b-glucosidasas catalizan la hidrolisis de celobiosa y celooligosacaridos y producen glucosa. Estos enzimas intervienen en la degradacion enzimatica de la celulosa y son uno de sus factores limitantes. Streptomycessp.  qm-b814 (atcc 11238) presenta un sistema b-glucosidasa b-glu  intracelular e inducible con celobiosa y carboximetilcelulosa. La induccion maxima se alcanza al cabo de 6-8 horas de la adicion del inductor (celobiosa).  la induccion implica sintesis proteica de novo. El sistema b-glu de streptomycessp. Qm-b814 esta aparentemente formado por dos componentes mayoritarios con igual patron de induccion y similar especificidad de sustrato: la b-glu-1 y la b-glu-2 de 62 y 35 kda.  respectivamente. Utilizando como cepas receptoras mutantes \u00abb-glu negativos\u00bb de streptomyces lividans 1326 cepa salvaje  (s lividans ag-11 y ag-12) se ha aislado en el plasmido recombinante pjc910 un fragmento de aproximadamente 4.2 kb, procedente del dna de streptomyces sp. Qm-b814  cepa donante , que expresa actividad b-glu intracelular y de forma constitutiva en los mutantes y en la cepa salvaje. Por movilidad electroforetica y masa molecular (54 kda), la b-glu clonada no corresponde a las b-glu-1 y -2 observadas en la cepa donante. Se la denomino b-glu-3. Las b-glu-1 y -3 se han purificado a partir de extractos crudos de streptomyces sp. Qm-b814 y s. Lividans ag-11 pjc910 , respectivamente. Ambos enzimas presentan caracteristicas fisico-quimicas y funcionales distintas si bien el analisis de sus propiedades cataliticas permite concluir que se trata de b-glucosidasas ec 3.2.1.21. Utilizando como cepa receptora el mutante s. Lividans ag-12 se ha aislado en el plasmido recombinante pjc2510 un fragmento de aproximadamente 14 kb, procedente del dna de streptomyces sp. Qm-b814, que complementa la mutacion restaurando la expresion de la b-glu caracteristica de la cepa salvaje s. Lividans 1326. Los resultados son compatibles con una complementac<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>El sistema beta-glucosidasa de streptomyces sp. qm-b814: proteinas y genes.<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 El sistema beta-glucosidasa de streptomyces sp. qm-b814: proteinas y genes. <\/li>\n<li><strong>Autor:<\/strong>\u00a0  Perez Pons Josep Antoni <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 Aut\u00f3noma de barcelona<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 01\/01\/1991<\/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>Enrique Querol Murillo<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tribunal<\/strong>\n<ul>\n<li>Presidente del tribunal: Jaume Palau Albet <\/li>\n<li>Francesc Xavier Avil\u00e9s Puigvert (vocal)<\/li>\n<li>Albert Boronat Margosa (vocal)<\/li>\n<li>Carles Casas Albero (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de Perez Pons Josep Antoni Las b-glucosidasas catalizan la hidrolisis de celobiosa y celooligosacaridos y producen glucosa. Estos [&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":[160,35,955,962,4578,17],"tags":[11105,251731,29519,18820,87504,89998],"class_list":["post-137189","post","type-post","status-publish","format-standard","hentry","category-bioquimica","category-ciencias-de-la-vida","category-enzimologia","category-genetica","category-ingenieria-genetica","category-quimica","tag-albert-boronat-margosa","tag-carles-casas-albero","tag-enrique-querol-murillo","tag-francesc-xavier-aviles-puigvert","tag-jaume-palau-albet","tag-perez-pons-josep-antoni"],"_links":{"self":[{"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/posts\/137189","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=137189"}],"version-history":[{"count":0,"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/posts\/137189\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/media?parent=137189"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/categories?post=137189"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/tags?post=137189"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}