{"id":30858,"date":"2019-10-31T21:37:49","date_gmt":"2019-10-31T18:37:49","guid":{"rendered":"https:\/\/prohoster.info\/blog\/pervyj-kompyuternyj-genom-mozhet-privesti-k-sozdaniyu-sinteticheskih-form-zhizni\/"},"modified":"2019-10-31T21:37:49","modified_gmt":"2019-10-31T18:37:49","slug":"pervyj-kompyuternyj-genom-mozhet-privesti-k-sozdaniyu-sinteticheskih-form-zhizni","status":"publish","type":"post","link":"https:\/\/prohoster.info\/it\/blog\/news\/pervyj-kompyuternyj-genom-mozhet-privesti-k-sozdaniyu-sinteticheskih-form-zhizni","title":{"rendered":"Il primo genoma computerizzato potrebbe portare alla creazione di forme di vita sintetiche","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Tutte le sequenze di DNA delle forme di vita studiate sono conservate in un database appartenente al National Center for Biotechnology Information negli Stati Uniti. Il 1 aprile \u00e8 stata aggiunta una nuova voce al database: \u00abCaulobacter ethensis-2.0\u00bb. \u00c8 il primo genoma sintetico di un organismo vivente interamente modellato al computer e successivamente sintetizzato, sviluppato dai ricercatori dell'ETH Zurich (Scuola Politecnica Federale di Zurigo). Tuttavia, \u00e8 importante sottolineare che, sebbene il genoma C. ethensis-2.0 sia stato ottenuto con successo sotto forma di una grande molecola di DNA, l'organismo vivente corrispondente non esiste ancora.<\/p>\n<p><img decoding=\"async\" alt=\"Il primo genoma computerizzato potrebbe portare alla creazione di forme di vita sintetiche\" src=\"\/wp-content\/uploads\/2019\/04\/cdf4102b5589faff4ab8a48d0b1676fd.jpeg\" style=\"display:block;margin: 0 auto;\" \/><\/p>\n<p>Il lavoro di ricerca \u00e8 stato condotto da Bit Christen, professore di biologia sistematica sperimentale, e suo fratello Matthias Christen - chimico. Il nuovo genoma, chiamato Caulobacter ethensis-2.0, \u00e8 stato creato mediante la pulizia e l'ottimizzazione del codice naturale del batterio Caulobacter crescentus - un batterio innocuo che vive in acqua dolce in tutto il mondo.&nbsp;&nbsp;<\/p>\n<p><img decoding=\"async\" alt=\"Il primo genoma computerizzato potrebbe portare alla creazione di forme di vita sintetiche\" src=\"\/wp-content\/uploads\/2019\/04\/e43d8d735720784f356b06c01a103937.jpeg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<\/center><\/p>\n<p>Oltre dieci anni fa, un team guidato dal genetista Craig Venter ha creato il primo batterio \u00absintetico\u00bb. Durante il suo lavoro, i ricercatori hanno sintetizzato una copia del genoma Mycoplasma mycoides, che \u00e8 stata poi impiantata in una cellula ospite, la quale si \u00e8 dimostrata completamente vitale e ha mantenuto la capacit\u00e0 di autoriprodursi.<\/p>\n<p>La nuova ricerca continua il lavoro di Kreiger. Se in precedenza gli scienziati avevano creato un modello digitale del DNA di un organismo reale e sulla base di esso avevano sintetizzato una molecola, il nuovo progetto va oltre, utilizzando il codice originale del DNA. Gli scienziati lo hanno notevolmente modificato prima di sintetizzarlo e testarne la funzionalit\u00e0.<\/p>\n<p>I ricercatori hanno iniziato con il genoma originale di C. crescentus, che contiene 4000 geni. Come in tutti gli organismi viventi, la maggior parte di questi geni non porta alcuna informazione ed \u00e8 considerata \u00abDNA spazzatura\u00bb. Dopo un'analisi, i ricercatori hanno concluso che solo circa 680 di essi sono necessari per il mantenimento della vita del batterio in laboratorio.<\/p>\n<p>Dopo aver rimosso il \u00abDNA spazzatura\u00bb e ottenuto il genoma minimo di C. crescentus, il team ha continuato il lavoro. Per il DNA degli organismi viventi \u00e8 caratteristica la presenza di ridondanza incorporata, in quanto la sintesi della stessa proteina \u00e8 codificata da geni diversi in diverse posizioni della catena. I ricercatori hanno sostituito pi\u00f9 di 1\/6 delle 800 000 lettere di DNA durante l'ottimizzazione per rimuovere il codice duplicato.<\/p>\n<p>\u00abGrazie al nostro algoritmo, abbiamo completamente riscritto il genoma in una nuova sequenza di lettere DNA che non somiglia pi\u00f9 all'originale\u00bb, afferma Bit Kristen, co-autore dello studio. \u00abLa funzione biologica a livello di sintesi proteica \u00e8 rimasta invariata\u00bb.<\/p>\n<p>Per verificare se la catena ottenuta funzioner\u00e0 correttamente in una cellula viva, i ricercatori hanno coltivato un ceppo di batteri che conteneva nel proprio DNA sia il genoma naturale del Caulobacter che segmenti del genoma artificiale. Gli scienziati disabilitavano singoli geni naturali e testavano la capacit\u00e0 dei loro analoghi artificiali di svolgere lo stesso ruolo biologico. Il risultato \u00e8 stato piuttosto impressionante: circa 580 geni artificiali su 680 si sono rivelati operativi.<\/p>\n<p>\u00abGrazie alle conoscenze acquisite, saremo in grado di migliorare il nostro algoritmo e sviluppare una nuova versione del genoma 3.0\u00bb, afferma Kristen. \u00abCrediamo che nel prossimo futuro creeremo cellule batteriche vive con un genoma completamente sintetico\u00bb.<\/p>\n<p>Nella prima fase, tali ricerche aiuteranno i genetisti a verificare l'accuratezza delle proprie conoscenze riguardo alla comprensione del DNA e al ruolo dei singoli geni in esso, poich\u00e9 qualsiasi errore nella sintesi della catena porter\u00e0 alla morte dell'organismo con un nuovo genoma o alla sua incapacit\u00e0. In futuro, porteranno alla creazione di microrganismi sintetici progettati per compiti predefiniti. I virus artificiali potranno combattere i loro omologhi naturali, mentre batteri speciali produrranno vitamine o farmaci.<\/p>\n<p>Lo studio \u00e8 stato pubblicato sulla rivista PNAS.<\/p>\n<p><center><\/p>\n<p><\/center><\/p>\n<p>\t\t\t\t<center><br \/>\n\t\t\t\t\t\t\t\t<\/center><br \/>\n<br \/>Fonte: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/3dnews.ru\/985176\">3dnews.ru<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u0412\u0441\u0435 \u043f\u043e\u0441\u043b\u0435\u0434\u043e\u0432\u0430\u0442\u0435\u043b\u044c\u043d\u043e\u0441\u0442\u0438 \u0414\u041d\u041a \u0438\u0441\u0441\u043b\u0435\u0434\u043e\u0432\u0430\u043d\u043d\u044b\u0445 \u0443\u0447\u0451\u043d\u044b\u043c\u0438 \u0444\u043e\u0440\u043c \u0436\u0438\u0437\u043d\u0438 \u0445\u0440\u0430\u043d\u044f\u0442\u0441\u044f \u0432 \u0431\u0430\u0437\u0435 \u0434\u0430\u043d\u043d\u044b\u0445, \u043f\u0440\u0438\u043d\u0430\u0434\u043b\u0435\u0436\u0430\u0449\u0435\u0439 \u041d\u0430\u0446\u0438\u043e\u043d\u0430\u043b\u044c\u043d\u043e\u043c\u0443 \u0446\u0435\u043d\u0442\u0440\u0443 \u0431\u0438\u043e\u0442\u0435\u0445\u043d\u043e\u043b\u043e\u0433\u0438\u0447\u0435\u0441\u043a\u043e\u0439 \u0438\u043d\u0444\u043e\u0440\u043c\u0430\u0446\u0438\u0438 \u0432 \u0421\u0428\u0410. \u0418 1 \u0430\u043f\u0440\u0435\u043b\u044f \u0432 \u0431\u0430\u0437\u0435 \u0434\u0430\u043d\u043d\u044b\u0445 \u043f\u043e\u044f\u0432\u0438\u043b\u0430\u0441\u044c \u043d\u043e\u0432\u0430\u044f \u0437\u0430\u043f\u0438\u0441\u044c: &laquo;Caulobacter ethensis-2.0&raquo;. \u042d\u0442\u043e \u043f\u0435\u0440\u0432\u044b\u0439 \u0432 \u043c\u0438\u0440\u0435 \u043f\u043e\u043b\u043d\u043e\u0441\u0442\u044c\u044e \u0441\u043c\u043e\u0434\u0435\u043b\u0438\u0440\u043e\u0432\u0430\u043d\u043d\u044b\u0439 \u043d\u0430 \u043a\u043e\u043c\u043f\u044c\u044e\u0442\u0435\u0440\u0435 \u0438 \u0437\u0430\u0442\u0435\u043c \u0441\u0438\u043d\u0442\u0435\u0437\u0438\u0440\u043e\u0432\u0430\u043d\u043d\u044b\u0439 \u0441\u0438\u043d\u0442\u0435\u0442\u0438\u0447\u0435\u0441\u043a\u0438\u0439 \u0433\u0435\u043d\u043e\u043c \u0436\u0438\u0432\u043e\u0433\u043e \u043e\u0440\u0433\u0430\u043d\u0438\u0437\u043c\u0430, \u0440\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u0430\u043d\u043d\u044b\u0439 \u0443\u0447\u0451\u043d\u044b\u043c\u0438 \u0438\u0437 ETH Zurich (\u0428\u0432\u0435\u0439\u0446\u0430\u0440\u0441\u043a\u043e\u0439 \u0432\u044b\u0441\u0448\u0435\u0439 \u0442\u0435\u0445\u043d\u0438\u0447\u0435\u0441\u043a\u043e\u0439 \u0448\u043a\u043e\u043b\u044b \u0426\u044e\u0440\u0438\u0445\u0430). \u041e\u0434\u043d\u0430\u043a\u043e [&hellip;]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":22841,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-30858","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.1.1 - aioseo.com -->\n\t<meta name=\"description\" content=\"\u0412\u0441\u0435 \u043f\u043e\u0441\u043b\u0435\u0434\u043e\u0432\u0430\u0442\u0435\u043b\u044c\u043d\u043e\u0441\u0442\u0438 \u0414\u041d\u041a \u0438\u0441\u0441\u043b\u0435\u0434\u043e\u0432\u0430\u043d\u043d\u044b\u0445 \u0443\u0447\u0451\u043d\u044b\u043c\u0438 \u0444\u043e\u0440\u043c \u0436\u0438\u0437\u043d\u0438 \u0445\u0440\u0430\u043d\u044f\u0442\u0441\u044f \u0432 \u0431\u0430\u0437\u0435 \u0434\u0430\u043d\u043d\u044b\u0445, 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