{"id":13507,"date":"2024-07-19T18:14:47","date_gmt":"2024-07-19T18:14:47","guid":{"rendered":"https:\/\/dailyai.com\/?p=13507"},"modified":"2024-07-20T12:17:50","modified_gmt":"2024-07-20T12:17:50","slug":"ai-model-simulates-500-million-years-of-evolution-to-create-a-novel-fluorescent-protein","status":"publish","type":"post","link":"https:\/\/dailyai.com\/it\/2024\/07\/ai-model-simulates-500-million-years-of-evolution-to-create-a-novel-fluorescent-protein\/","title":{"rendered":"Un modello di intelligenza artificiale simula 500 milioni di anni di evoluzione per creare una nuova proteina fluorescente"},"content":{"rendered":"<p><b>Gli scienziati hanno sviluppato un sistema di intelligenza artificiale in grado di simulare centinaia di milioni di anni di evoluzione delle proteine, creando una nuova proteina fluorescente diversa da quelle presenti in natura.<\/b><\/p>\n<p><span style=\"font-weight: 400;\">Il team di ricerca, guidato da Alexander Rives di EvolutionaryScale, ha creato un modello di linguaggio di grandi dimensioni (LLM) chiamato ESM3 per elaborare e generare informazioni su sequenze, strutture e funzioni delle proteine.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Addestrandosi sui dati di miliardi di proteine naturali, ESM3 ha imparato a prevedere come le proteine potrebbero evolvere e cambiare nel tempo.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">I ricercatori sostengono che l'ESM3 non si limita a recuperare o ricombinare le informazioni sulle proteine esistenti.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Sembra invece che abbia sviluppato una comprensione dei principi fondamentali che regolano la struttura e la funzione delle proteine, consentendo di generare progetti veramente innovativi.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">\"ESM3 \u00e8 un simulatore emergente che \u00e8 stato appreso risolvendo un compito di predizione di token su dati generati dall'evoluzione\", spiegano i ricercatori nel documento <\/span><a href=\"https:\/\/www.biorxiv.org\/content\/10.1101\/2024.07.01.600583v1.full.pdf\" target=\"_blank\" rel=\"noopener\"><span style=\"font-weight: 400;\">studio<\/span><\/a><span style=\"font-weight: 400;\">.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">\"\u00c8 stato teorizzato che le reti neurali scoprano la struttura sottostante dei dati che sono addestrati a prevedere. In questo modo, la soluzione del compito di predizione dei token richiederebbe al modello di apprendere la struttura profonda che determina quali passi pu\u00f2 compiere l'evoluzione, cio\u00e8 la biologia fondamentale delle proteine\".<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Per testare il modello, il team ha chiesto all'ESM3 di progettare una proteina fluorescente verde (GFP) completamente nuova, un tipo di proteina responsabile della bioluminescenza in alcuni animali marini e ampiamente utilizzata nella ricerca biotecnologica.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">La proteina generata dall'AI, denominata esmGFP, condivide solo 58% della sua sequenza con le proteine fluorescenti note pi\u00f9 simili.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">In particolare, esmGFP presenta una luminosit\u00e0 paragonabile a quella delle GFP presenti in natura e mantiene la caratteristica struttura a forma di barile essenziale per la fluorescenza.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">I ricercatori stimano che la produzione di una proteina cos\u00ec distante dalle GFP conosciute avrebbe richiesto oltre 500 milioni di anni di evoluzione naturale.<\/span><\/p>\n<h2>Per saperne di pi\u00f9 sullo studio<\/h2>\n<p><span style=\"font-weight: 400;\">Il processo di generazione di esmGFP ha comportato diverse fasi chiave:<\/span><\/p>\n<ol>\n<li class=\"whitespace-normal break-words\"><strong>Dati<\/strong>: I ricercatori hanno addestrato ESM3 su circa 2,78 miliardi di proteine naturali raccolte da database di sequenze e strutture. Si tratta di dati provenienti da UniRef, MGnify, JGI e altre fonti.<\/li>\n<li class=\"whitespace-normal break-words\"><strong>Architettura<\/strong>: ESM3 utilizza un'architettura basata su trasformatori con alcune modifiche, tra cui un meccanismo di \"attenzione geometrica\" per elaborare le strutture proteiche 3D.<\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Prompting<\/b><span style=\"font-weight: 400;\">: I ricercatori hanno fornito a ESM3 informazioni strutturali minime da un modello di GFP (la proteina fluorescente).<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Generazione<\/b><span style=\"font-weight: 400;\">: ESM3 ha utilizzato questo prompt per generare nuove sequenze e strutture proteiche attraverso un processo iterativo.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Filtraggio<\/b><span style=\"font-weight: 400;\">: Migliaia di progetti candidati sono stati valutati computazionalmente e filtrati per trovare i candidati pi\u00f9 forti.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Test sperimentali<\/b><span style=\"font-weight: 400;\">: I progetti pi\u00f9 promettenti sono stati sintetizzati e testati in laboratorio per verificare l'attivit\u00e0 di fluorescenza.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Raffinatezza<\/b><span style=\"font-weight: 400;\">: Dopo aver identificato una variante di GFP debole ma distante, i ricercatori hanno utilizzato ESM3 per ottimizzare ulteriormente il progetto, producendo infine una proteina fluorescente pi\u00f9 luminosa.<\/span><\/li>\n<\/ol>\n<p><span style=\"font-weight: 400;\">Le implicazioni di questa ricerca vanno oltre la creazione di una singola nuova proteina.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">ESM3 dimostra la capacit\u00e0 di esplorare spazi di progettazione proteica molto lontani da quelli prodotti dall'evoluzione naturale, aprendo nuove strade per la creazione di proteine con le funzioni o le propriet\u00e0 desiderate.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Tiffany Taylor, docente di Ecologia microbica ed evoluzione presso l'Universit\u00e0 di Bath, che non ha partecipato allo studio, <\/span><a href=\"https:\/\/www.livescience.com\/technology\/artificial-intelligence\/chatgpt-moment-for-biology-ex-meta-scientists-develop-ai-that-creates-proteins-not-found-in-nature\"><span style=\"font-weight: 400;\">ha dichiarato a LiveScience<\/span><\/a><span style=\"font-weight: 400;\">: \"Al momento ci manca ancora la comprensione fondamentale di come le proteine, soprattutto quelle 'nuove per la scienza', si comportano quando vengono introdotte in un sistema vivente, ma questo \u00e8 un nuovo passo avanti che ci permette di approcciare la biologia sintetica in modo nuovo.\"<\/span><\/p>\n<p><span style=\"font-weight: 400;\">\"I modelli di intelligenza artificiale come l'ESM3 consentiranno di scoprire nuove proteine che i vincoli della selezione naturale non permetterebbero mai, creando innovazioni nell'ingegneria proteica che l'evoluzione non pu\u00f2 fare\", ha aggiunto il dottor Taylor.<\/span><\/p>\n<h2>Progettazione generativa di proteine<\/h2>\n<p><span style=\"font-weight: 400;\">La ricerca e la progettazione di proteine guidate dall'intelligenza artificiale hanno raggiunto un livello altissimo. <\/span><a href=\"https:\/\/dailyai.com\/it\/2024\/05\/alphafold-3-deepmind-evolves-its-ai-protein-folding-project\/\"><span style=\"font-weight: 400;\"><span class=\"noTranslate\" data-no-translation=\"\"><span class=\"noTranslate\" data-no-translation=\"\"><span class=\"noTranslate\" data-no-translation=\"\"><span class=\"noTranslate\" data-no-translation=\"\">DeepMind<\/span><\/span><\/span><\/span>AlphaFold 3<\/span><\/a><span style=\"font-weight: 400;\"> prevedere il modo in cui le proteine si ripiegano con incredibile precisione.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Le proteine progettate dall'AI hanno anche dimostrato <\/span><a href=\"https:\/\/dailyai.com\/it\/2023\/12\/ai-designed-proteins-display-exceptional-binding-strengths\/\"><span style=\"font-weight: 400;\">eccellente forza di legame<\/span><\/a><span style=\"font-weight: 400;\">, dimostrando che hanno un uso pratico.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Tuttavia, come per ogni tecnologia in rapida evoluzione che in qualche modo interagisce con la biologia, ci sono dei rischi.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">In primo luogo, se le proteine progettate dall'intelligenza artificiale dovessero sfuggire nell'ambiente, potrebbero potenzialmente interagire con gli ecosistemi naturali, superando persino le proteine naturali o interrompendo i processi biologici esistenti.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">In secondo luogo, potrebbero innescare interazioni inaspettate all'interno degli organismi viventi, creando potenzialmente anche agenti biologici dannosi o tossine.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">I ricercatori hanno recentemente chiesto <\/span><a href=\"https:\/\/dailyai.com\/it\/2024\/03\/researchers-create-voluntary-safety-rules-for-ai-protein-design\/\"><span style=\"font-weight: 400;\">guardie etiche<\/span><\/a><span style=\"font-weight: 400;\"> per la progettazione di proteine AI per evitare risultati rischiosi in questo campo eccitante, anche se imprevedibile.\u00a0<\/span><\/p>","protected":false},"excerpt":{"rendered":"<p>Gli scienziati hanno sviluppato un sistema di intelligenza artificiale in grado di simulare centinaia di milioni di anni di evoluzione delle proteine, creando una nuova proteina fluorescente diversa da quelle presenti in natura. Il team di ricerca, guidato da Alexander Rives di EvolutionaryScale, ha creato un modello di linguaggio di grandi dimensioni (LLM) chiamato ESM3 per elaborare e generare informazioni su sequenze, strutture e funzioni delle proteine.  Addestrandosi sui dati di miliardi di proteine naturali, ESM3 ha imparato a prevedere come le proteine potrebbero evolvere e cambiare nel tempo. I ricercatori sostengono che ESM3 non si limita a recuperare o ricombinare le informazioni esistenti sulle proteine.  Al contrario, sembra aver sviluppato una comprensione della<\/p>","protected":false},"author":2,"featured_media":13508,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[88],"tags":[353,105,178],"class_list":["post-13507","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-ethics","tag-biology","tag-machine-learning","tag-medicine"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>AI model simulates 500 million years of evolution to create a novel fluorescent protein | DailyAI<\/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:\/\/dailyai.com\/it\/2024\/07\/ai-model-simulates-500-million-years-of-evolution-to-create-a-novel-fluorescent-protein\/\" \/>\n<meta property=\"og:locale\" content=\"it_IT\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"AI model simulates 500 million years of evolution to create a novel fluorescent protein | DailyAI\" \/>\n<meta property=\"og:description\" content=\"Scientists have developed an AI system capable of simulating hundreds of millions of years of protein evolution, creating a novel fluorescent protein unlike any found in nature. The research team, led by Alexander Rives at EvolutionaryScale, created a large language model (LLM) called ESM3 to process and generate information about protein sequences, structures, and functions.\u00a0 By training on data from billions of natural proteins, ESM3 learned to predict how proteins might evolve and change over time. 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The research team, led by Alexander Rives at EvolutionaryScale, created a large language model (LLM) called ESM3 to process and generate information about protein sequences, structures, and functions.\u00a0 By training on data from billions of natural proteins, ESM3 learned to predict how proteins might evolve and change over time. 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