{"id":63715,"date":"2018-12-10T12:02:47","date_gmt":"2018-12-10T11:02:47","guid":{"rendered":"http:\/\/ibecbarcelona.eu\/?p=63715"},"modified":"2020-06-15T11:40:00","modified_gmt":"2020-06-15T09:40:00","slug":"les-proteines-poden-transferir-electrons-a-distancia","status":"publish","type":"post","link":"https:\/\/ibecbarcelona.eu\/ca\/les-proteines-poden-transferir-electrons-a-distancia\/","title":{"rendered":"Les prote\u00efnes poden transferir electrons a dist\u00e0ncia"},"content":{"rendered":"<p>Les exig\u00e8ncies d\u2019aquestes prote\u00efnes quant a les seves capacitats de TE poden ser contradict\u00f2ries: la seva uni\u00f3 ha de ser estreta per mantenir un nivell de TE elevat, per\u00f2 suficientment febles per permetre un alt nivell de rotaci\u00f3, aix\u00ed com una TE eficient. A mesura que les prote\u00efnes redox s\u2019apropen un a l\u2019altre, es forma un complex de \u00abtrobada inicial\u00bb que condueix a un complex final \u00abactiu\u00bb, que \u00e9s el moment en qu\u00e8 es pensava que es produ\u00efa la TE.<br \/>\n<img decoding=\"async\" class=\"size-full wp-image-63734 alignright lazyload\" data-src=\"https:\/\/ibecbarcelona.eu\/wp-content\/uploads\/2018\/12\/PGorostiza_web2.png\" alt=\"\" width=\"500\" height=\"333\" data-srcset=\"https:\/\/ibecbarcelona.eu\/wp-content\/uploads\/2018\/12\/PGorostiza_web2.png 500w, https:\/\/ibecbarcelona.eu\/wp-content\/uploads\/2018\/12\/PGorostiza_web2-300x200.png 300w, https:\/\/ibecbarcelona.eu\/wp-content\/uploads\/2018\/12\/PGorostiza_web2-195x130.png 195w, https:\/\/ibecbarcelona.eu\/wp-content\/uploads\/2018\/12\/PGorostiza_web2-150x100.png 150w\" data-sizes=\"(max-width: 500px) 100vw, 500px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 500px; --smush-placeholder-aspect-ratio: 500\/333;\" \/><\/p>\n<p>Mitjan\u00e7ant la cristal\u00b7lografia de raigs X s\u2019ha pogut mostrar l\u2019estructura de diversos complexos actius entre prote\u00efnes redox, i les difer\u00e8ncies substancials observades en la dist\u00e0ncia entre els llocs actius d\u2019alguns d\u2019ells, ha plantejat la q\u00fcesti\u00f3 de si la TE entre prote\u00efnes podria produir-se mentre la prote\u00efna s\u2019apropava a la seva prote\u00efna complement\u00e0ria. Investigadors dels grups de Nanobioenginyeria i Nanosondes i nanocommunatadors de l\u2019IBEC, juntament amb els seus col\u00b7laboradors de la Universitat de Barcelona (UB) i la Universitat de Sevilla, han treballat en l\u2019\u00fas d\u2019una t\u00e8cnica anomenada espectrosc\u00f2pia d\u2019efecte t\u00fanel electroqu\u00edmica per mostrar que l\u2019actual proc\u00e9s entre dues prote\u00efnes redox es produeix a dist\u00e0ncies sorprenentment llargues.<\/p>\n<p>\u201cLes simulacions per ordinador suggereixen que les prote\u00efnes poden manipular la soluci\u00f3 que les separa per tal de dur a terme les seves funcions de TE\u201d, explica Anna Lagunas, investigadora s\u00e8nior del grup de Nanobioenginyeria de l\u2019IBEC i primera autora de l\u2019article. \u201cHem vist una reducci\u00f3 de la densitat i\u00f2nica entre les prote\u00efnes, que genera una via per on s\u2019est\u00e9n el seu camp el\u00e8ctric a trav\u00e9s de la soluci\u00f3 aquosa\u201d.<\/p>\n<p>Aquesta observaci\u00f3 q\u00fcestiona la hip\u00f2tesi acceptada en qu\u00e8 la formaci\u00f3 d\u2019un complex fort entre les prote\u00efnes \u00e9s necessari per transferir la c\u00e0rrega, i pot aportar una explicaci\u00f3 de com les prote\u00efnes redox concilien una alta especificitat amb una uni\u00f3 m\u00e9s feble, per tal de mantenir l\u2019alt nivell de rotaci\u00f3 que requereix la TE.<\/p>\n<p>&nbsp;<\/p>\n<p>&#8212;<\/p>\n<p><em>A<\/em><em>. <\/em><em>Lagunas<\/em><em>, <\/em><em>A<\/em><em>. <\/em><em>Guerra<\/em><em>&#8211;<\/em><em>Castellano<\/em><em>, <\/em><em>A<\/em><em>. <\/em><em>Nin<\/em><em>&#8211;<\/em><em>Hill<\/em><em>, <\/em><em>I<\/em><em>. <\/em><em>Diaz<\/em><em>&#8211;<\/em><em>Moreno<\/em><em>, <\/em><em>M<\/em><em>. <\/em><em>A<\/em><em>. <\/em><em>De<\/em> <em>la<\/em> <em>Rosa<\/em><em>, <\/em><em>J<\/em><em>. <\/em><em>Samitier<\/em><em>, <\/em><em>C<\/em><em>. <\/em><em>Rovira<\/em><em>, <\/em><em>P<\/em><em>. <\/em><em>Gorostiza<\/em><em> (2018). <\/em><em>Long<\/em> <em>distance<\/em> <em>electron<\/em> <em>transfer<\/em> <em>through<\/em> <em>the<\/em> <em>aqueous<\/em> <em>solution<\/em> <em>between<\/em> <em>redox<\/em> <em>partner<\/em> <em>proteins<\/em><em>. <\/em>Nature Communications<em>, epub ahead of print.<\/em><\/p>\n","protected":false},"excerpt":{"rendered":"<h3><img decoding=\"async\" class=\"left size-medium wp-image-63624 lazyload\" data-src=\"http:\/\/www.ibecbarcelona.eu\/wp-content\/uploads\/2018\/12\/AnnaLagunas_JosepSamitier_web.png\" alt=\"\" width=\"500\" height=\"\"  src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\">Investigadors de l\u2019Institut de Bioenginyeria de Catalunya (IBEC) han publicat un estudi a la revista\u00a0Nature Communications\u00a0que revela que la transfer\u00e8ncia d\u2019electrons pot tenir lloc mentre la prote\u00efna s\u2019apropa a la seva prote\u00efna complementaria, i no nom\u00e9s quan aquestes ja hi estan unides, com es pensava fins ara. <\/h3>\n<p>Aquests resultats obren la porta a una nova forma de considerar com interactuen\u00a0les prote\u00efnes i pot tenir implicacions per entendre millor molts altres processos, com ara la fotos\u00edntesi, la respiraci\u00f3 o la desintoxicaci\u00f3, en els quals la transfer\u00e8ncia d\u2019electrons juga un paper important.<br \/>\nLa reubicaci\u00f3 d\u2019un electr\u00f3 des d\u2019una entitat qu\u00edmica a una altra \u2014la transfer\u00e8ncia d\u2019electrons (TE)\u2014, no t\u00e9 lloc de forma passiva, sin\u00f3 que els electrons s\u00f3n transportats de forma individual per les prote\u00efnes redox.<\/p>\n","protected":false},"author":4,"featured_media":63699,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[96],"tags":[1136],"post_formats":[],"class_list":["post-63715","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-noticies-de-recerca","tag-josep-samitier-ca"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - 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La reubicaci\u00f3 d\u2019un electr\u00f3 des d\u2019una entitat qu\u00edmica a una altra \u2014la transfer\u00e8ncia d\u2019electrons (TE)\u2014, no t\u00e9 lloc de forma passiva, sin\u00f3 que els electrons s\u00f3n transportats de forma individual per les prote\u00efnes redox.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/ibecbarcelona.eu\/ca\/les-proteines-poden-transferir-electrons-a-distancia\/\" \/>\n<meta property=\"og:site_name\" content=\"Institute for Bioengineering of Catalonia\" \/>\n<meta property=\"article:published_time\" content=\"2018-12-10T11:02:47+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2020-06-15T09:40:00+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/ibecbarcelona.eu\/wp-content\/uploads\/2018\/12\/AnnaLagunas_JosepSamitier_web.png\" \/>\n\t<meta property=\"og:image:width\" content=\"500\" \/>\n\t<meta property=\"og:image:height\" content=\"328\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\n<meta name=\"author\" content=\"\u00c0ngels L\u00f3pez\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Escrit per\" \/>\n\t<meta name=\"twitter:data1\" content=\"\u00c0ngels L\u00f3pez\" \/>\n\t<meta name=\"twitter:label2\" content=\"Temps estimat de lectura\" \/>\n\t<meta name=\"twitter:data2\" content=\"2 minuts\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/ibecbarcelona.eu\\\/ca\\\/les-proteines-poden-transferir-electrons-a-distancia\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/ibecbarcelona.eu\\\/ca\\\/les-proteines-poden-transferir-electrons-a-distancia\\\/\"},\"author\":{\"name\":\"\u00c0ngels L\u00f3pez\",\"@id\":\"https:\\\/\\\/ibecbarcelona.eu\\\/#\\\/schema\\\/person\\\/c212c6b589546130be67986b9290e2b8\"},\"headline\":\"Les prote\u00efnes poden transferir electrons a dist\u00e0ncia\",\"datePublished\":\"2018-12-10T11:02:47+00:00\",\"dateModified\":\"2020-06-15T09:40:00+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/ibecbarcelona.eu\\\/ca\\\/les-proteines-poden-transferir-electrons-a-distancia\\\/\"},\"wordCount\":416,\"publisher\":{\"@id\":\"https:\\\/\\\/ibecbarcelona.eu\\\/#organization\"},\"image\":{\"@id\":\"https:\\\/\\\/ibecbarcelona.eu\\\/ca\\\/les-proteines-poden-transferir-electrons-a-distancia\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/ibecbarcelona.eu\\\/wp-content\\\/uploads\\\/2018\\\/12\\\/AnnaLagunas_JosepSamitier_web.png\",\"keywords\":[\"Josep Samitier\"],\"articleSection\":[\"Not\u00edcies de recerca\"],\"inLanguage\":\"ca\"},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/ibecbarcelona.eu\\\/ca\\\/les-proteines-poden-transferir-electrons-a-distancia\\\/\",\"url\":\"https:\\\/\\\/ibecbarcelona.eu\\\/ca\\\/les-proteines-poden-transferir-electrons-a-distancia\\\/\",\"name\":\"Les prote\u00efnes poden transferir electrons a dist\u00e0ncia - 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