{"id":88648,"date":"2021-11-12T11:00:57","date_gmt":"2021-11-12T10:00:57","guid":{"rendered":"https:\/\/ibecbarcelona.eu\/?p=88648"},"modified":"2021-11-16T12:22:04","modified_gmt":"2021-11-16T11:22:04","slug":"investigadors-descobreixen-com-les-membranes-cel%c2%b7lulars-canvien-la-curvatura-en-funcio-de-les-proteines-bar","status":"publish","type":"post","link":"https:\/\/ibecbarcelona.eu\/ca\/investigadors-descobreixen-com-les-membranes-cel%c2%b7lulars-canvien-la-curvatura-en-funcio-de-les-proteines-bar\/","title":{"rendered":"Investigadors descobreixen com les membranes cel\u00b7lulars canvien la curvatura en funci\u00f3 de les prote\u00efnes BAR"},"content":{"rendered":"
\"\"
Simulacions d’un tub de membrana (600\u00a0<\/span>nm<\/span>\u00a0de di\u00e0metre) reformat din\u00e0micament per una prote\u00efna BAR.<\/span><\/span>\u00a0<\/span><\/figcaption><\/figure>\n

El cos hum\u00e0 \u00e9s un mosaic complex format per un gran nombre de c\u00e8l\u00b7lules amb diferents propietats, per\u00f2 totes comparteixen una caracter\u00edstica comuna: posseeixen una\u00a0coberta\u00a0extern (tamb\u00e9 anomenada membrana), que es corba a escala microm\u00e8trica i\u00a0nanom\u00e9trica.<\/span>\u00a0<\/span><\/p>\n

Durant funcions cel\u00b7lulars essencials com la migraci\u00f3,\u00a0l\u2019endo\/exocitosi, o quan es deformen per forces externes, les membranes cel\u00b7lulars canvien constantment de\u00a0forma. Aqu\u00ed, les prote\u00efnes BAR juguen un paper fonamental. No obstant aix\u00f2, no es coneixien b\u00e9 els detalls de la din\u00e0mica i la\u00a0mecanoqu\u00edmica\u00a0del proc\u00e9s fins al moment.<\/span>\u00a0<\/span><\/p>\n

Ara, un grup d’investigadors de l’Institut de\u00a0Bioenginyeria\u00a0de Catalunya (IBEC) i de la Universitat Polit\u00e8cnica de Catalunya (UPC) publiquen nous resultats en la Revista\u00a0<\/span>Nature Communications<\/span><\/i><\/a>, que estableixen les bases per a comprendre diversos processos de deformaci\u00f3 de membranes, que ocorren tant en escenaris fisiol\u00f2gics normals de la c\u00e8l\u00b7lula, com en situacions de malaltia. Espec\u00edficament, els investigadors descriuen esdeveniments nous de remodelaci\u00f3 d’estructures de membrana de baixa curvatura per prote\u00efnes BAR, que anteriorment no es consideraven. Els investigadors tamb\u00e9 mostren com la deformaci\u00f3 mec\u00e0nica de la membrana desencadena una resposta bioqu\u00edmica\u00a0mitjan\u00e7ada\u00a0per prote\u00efnes BAR.<\/span>\u00a0<\/span><\/p>\n

La clau per a comprendre les membranes cel\u00b7lulars i la seva curvatura<\/span><\/span>\u00a0<\/span> <\/strong><\/h3>\n

Experimentalment, els investigadors van desenvolupar un sistema\u00a0<\/span>in vitro<\/span><\/i>\u00a0per a deformar mec\u00e0nicament membranes artificials, exposar-les a prote\u00efnes BAR purificades i observar la din\u00e0mica resultant mitjan\u00e7ant microsc\u00f2pia confocal. A m\u00e9s, els investigadors van desenvolupar models te\u00f2rics per a comprendre el proc\u00e9s, analitzant la din\u00e0mica i\u00a0mecanoqu\u00edmica. Combinant enfocaments experimentals i te\u00f2rics, els investigadors tamb\u00e9 van observar que les deformacions de la membrana cel\u00b7lular depenen de la forma inicial de la membrana.<\/span>\u00a0<\/span><\/p>\n

Anabel-Lise\u00a0le\u00a0Roux (IBEC) i Caterina\u00a0Tozzi\u00a0(UPC),\u00a0co-primeres autores de l’estudi, expliquen la import\u00e0ncia de comptar amb enfocaments tant experimentals com te\u00f2rics per a comprendre processos de deformaci\u00f3 tan complexos:<\/span>\u00a0<\/span><\/p>\n

La interacci\u00f3 realment estreta entre els experiments i la modelitzaci\u00f3 va ser essencial per a comprendre en profunditat un proc\u00e9s\u00a0<\/span>mecanoqu\u00edmic<\/span> molt complex.<\/span><\/strong><\/p>\n

Anabel-Lise<\/span>\u00a0Le Roux\u00a0<\/span>i<\/span>\u00a0Caterina\u00a0<\/span>Tozzi<\/span>.<\/span><\/span>\u00a0<\/span><\/strong><\/p>\n<\/blockquote>\n

El treball publicat, en\u00a0<\/span>Nature<\/span>\u00a0Communications, ha estat liderat pels investigadors s\u00e8nior\u00a0<\/span>Marino Arroyo\u00a0<\/span>(UPC) i Pere Roca-<\/span>Cusachs<\/span>\u00a0(IBEC \/ UB).<\/span><\/span>\u00a0<\/span><\/p>\n

 <\/p>\n

Article de refer\u00e8ncia: <\/strong>Anabel-Lise Le Roux, Caterina Tozzi, Nikhil Walani , Xarxa Quiroga, Dobryna Zalvidea, Xavier Trepat, Margarita Staykova, Marino Arroyo, Pere Roca-Cusachs. Dynamic Mechanochemical feedback between curved membranes and BAR protein self-organization.<\/a> Nat Commun<\/i>\u00a012,\u00a0<\/b>6550 (2021).<\/p>\n","protected":false},"excerpt":{"rendered":"

Un equip d’investigadors de l’IBEC i de la UPC, dirigit per Pere Roca-Cusachs i Marino Arroyo, estudia com les prote\u00efnes BAR, una fam\u00edlia de mol\u00e8cules que s’uneixen a les membranes cel\u00b7lulars corbes, s\u00f3n capaces de remodelar-les. Els cient\u00edfics publiquen en la revista Nature Communications, a trav\u00e9s d’experiments i models, la din\u00e0mica d’aquests processos de remodelaci\u00f3 de membranes que ocorren tant en c\u00e8l\u00b7lules normals com en escenaris de malalties. <\/h3>\n","protected":false},"author":4,"featured_media":88583,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[96],"tags":[1134],"post_formats":[],"class_list":["post-88648","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-noticies-de-recerca","tag-pere-roca-cusachs-ca"],"yoast_head":"\nInvestigadors descobreixen com les membranes cel\u00b7lulars canvien la curvatura en funci\u00f3 de les prote\u00efnes BAR - Institute for Bioengineering of Catalonia<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/ibecbarcelona.eu\/ca\/investigadors-descobreixen-com-les-membranes-cel\u00b7lulars-canvien-la-curvatura-en-funcio-de-les-proteines-bar\/\" \/>\n<meta property=\"og:locale\" content=\"ca_ES\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Investigadors descobreixen com les membranes cel\u00b7lulars canvien la curvatura en funci\u00f3 de les prote\u00efnes BAR - Institute for Bioengineering of Catalonia\" \/>\n<meta property=\"og:description\" content=\"Un equip d'investigadors de l'IBEC i de la UPC, dirigit per Pere Roca-Cusachs i Marino Arroyo, estudia com les prote\u00efnes BAR, una fam\u00edlia de mol\u00e8cules que s'uneixen a les membranes cel\u00b7lulars corbes, s\u00f3n capaces de remodelar-les. 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