{"id":13145,"date":"2024-06-28T10:17:24","date_gmt":"2024-06-28T10:17:24","guid":{"rendered":"https:\/\/dailyai.com\/?p=13145"},"modified":"2024-07-01T11:19:48","modified_gmt":"2024-07-01T11:19:48","slug":"university-of-toronto-researchers-build-peptide-prediction-model-that-beats-alphafold-2","status":"publish","type":"post","link":"https:\/\/dailyai.com\/fr\/2024\/06\/university-of-toronto-researchers-build-peptide-prediction-model-that-beats-alphafold-2\/","title":{"rendered":"Des chercheurs de l'Universit\u00e9 de Toronto construisent un mod\u00e8le de pr\u00e9diction des peptides qui bat AlphaFold 2"},"content":{"rendered":"<p><b>Des scientifiques du centre Donelly de l'universit\u00e9 de Toronto ont mis au point un mod\u00e8le d'intelligence artificielle de pointe appel\u00e9 PepFlow, capable de pr\u00e9dire les diverses formes adopt\u00e9es par les peptides avec une pr\u00e9cision sans pr\u00e9c\u00e9dent.\u00a0<\/b><\/p>\n<p><span style=\"font-weight: 400;\">Les peptides sont de petites mol\u00e9cules compos\u00e9es d'acides amin\u00e9s, les \u00e9l\u00e9ments constitutifs des prot\u00e9ines.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Si les peptides sont semblables aux prot\u00e9ines, ils sont beaucoup plus petits et plus flexibles, ce qui leur permet de se plier en une grande vari\u00e9t\u00e9 de formes.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">La forme sp\u00e9cifique d'un peptide est cruciale car elle d\u00e9termine la fa\u00e7on dont il interagit avec d'autres mol\u00e9cules dans le corps, ce qui dicte sa fonction biologique.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">La pr\u00e9diction des structures des prot\u00e9ines et des peptides est un d\u00e9fi de longue date en biologie. En raison de la complexit\u00e9 des math\u00e9matiques impliqu\u00e9es, il s'agit d'un excellent probl\u00e8me pour l'apprentissage automatique.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Ces derni\u00e8res ann\u00e9es, des mod\u00e8les d'IA tels que <\/span><a href=\"https:\/\/dailyai.com\/fr\/2024\/05\/alphafold-3-deepmind-evolves-its-ai-protein-folding-project\/\"><span style=\"font-weight: 400;\">AlphaFold 2 et 3<\/span><\/a><span style=\"font-weight: 400;\">d\u00e9velopp\u00e9s par DeepMind de Google, ont r\u00e9volutionn\u00e9 la pr\u00e9diction de la structure des prot\u00e9ines.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">AlphaFold2 utilise l'apprentissage profond pour pr\u00e9dire la structure 3D la plus probable d'une prot\u00e9ine sur la base de sa s\u00e9quence d'acides amin\u00e9s. Mais w<\/span><span style=\"font-weight: 400;\">i AlphaFold2 a connu un succ\u00e8s incroyable pour les prot\u00e9ines, il a des limites lorsqu'il s'agit de mol\u00e9cules tr\u00e8s flexibles comme les peptides.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">\"Jusqu'\u00e0 pr\u00e9sent, nous n'avons pas \u00e9t\u00e9 en mesure de mod\u00e9liser l'ensemble des conformations des peptides\". <\/span><a href=\"https:\/\/thedonnellycentre.utoronto.ca\/news\/u-t-researchers-develop-deep-learning-model-outperforms-google-ai-system-predict-peptide\" target=\"_blank\" rel=\"noopener\"><span style=\"font-weight: 400;\">a d\u00e9clar\u00e9 Osama Abdin<\/span><\/a><span style=\"font-weight: 400;\">, premier auteur de l'\u00e9tude.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Pepflow, document\u00e9 dans un <a href=\"https:\/\/www.nature.com\/articles\/s42256-024-00860-4\" target=\"_blank\" rel=\"noopener\">\u00e9tude publi\u00e9e<\/a> dans Nature Machine Intelligence, \"s'appuie sur l'apprentissage profond pour capturer les conformations pr\u00e9cises et exactes d'un peptide en quelques minutes\".<\/span><\/p>\n<p><span style=\"font-weight: 400;\">PepFlow utilise des mod\u00e8les d'intelligence artificielle inspir\u00e9s de <span class=\"noTranslate\" data-no-translation=\"\">Boltzmann generators.<\/span> Ces mod\u00e8les permettent d'apprendre les principes physiques fondamentaux qui r\u00e9gissent la fa\u00e7on dont la structure chimique d'un peptide d\u00e9termine son spectre de formes possibles.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Cela permet \u00e0 PepFlow de pr\u00e9dire avec pr\u00e9cision les structures de peptides pr\u00e9sentant des caract\u00e9ristiques inhabituelles, telles que les peptides circulaires form\u00e9s par macrocyclisation. Les peptides macrocycliques sont particuli\u00e8rement int\u00e9ressants pour le d\u00e9veloppement de m\u00e9dicaments en raison de leurs propri\u00e9t\u00e9s de liaison uniques.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Ce qui distingue PepFlow des mod\u00e8les comme AlphaFold2, c'est sa capacit\u00e9 \u00e0 pr\u00e9dire non seulement une structure, mais l'ensemble du \"paysage \u00e9nerg\u00e9tique\" d'un peptide.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Le paysage \u00e9nerg\u00e9tique repr\u00e9sente toutes les formes possibles que peut prendre un peptide et la fa\u00e7on dont il passe d'une conformation \u00e0 l'autre.<\/span><\/p>\n<p><span style=\"font-weight: 400;\"> La saisie de cette complexit\u00e9 structurelle est essentielle pour u<\/span><span style=\"font-weight: 400;\">comprendre comment les peptides fonctionnent dans diff\u00e9rents contextes biologiques.<\/span><\/p>\n<blockquote class=\"twitter-tweet\">\n<p dir=\"ltr\" lang=\"en\">Les chercheurs de <a href=\"https:\/\/twitter.com\/UofT?ref_src=twsrc%5Etfw\">@UofT<\/a> ont d\u00e9velopp\u00e9 une <a href=\"https:\/\/twitter.com\/hashtag\/DeepLearning?src=hash&amp;ref_src=twsrc%5Etfw\">#DeepLearning<\/a> appel\u00e9 PepFlow, qui peut pr\u00e9dire toutes les formes possibles de peptides.<\/p>\n<p>PepFlow peut contribuer au d\u00e9veloppement de m\u00e9dicaments en concevant des peptides qui agissent comme des liants. <a href=\"https:\/\/twitter.com\/hashtag\/DrugDiscovery?src=hash&amp;ref_src=twsrc%5Etfw\">1TP5D\u00e9couverte des m\u00e9dicaments<\/a><\/p>\n<p>En savoir plus \ud83d\udc49 <a href=\"https:\/\/t.co\/eAKOg5e7Cz\">https:\/\/t.co\/eAKOg5e7Cz<\/a> <a href=\"https:\/\/t.co\/mYP9YeiCOe\">pic.twitter.com\/mYP9YeiCOe<\/a><\/p>\n<p>- Centre Donnelly (@DonnellyCentre) <a href=\"https:\/\/twitter.com\/DonnellyCentre\/status\/1806328554348527953?ref_src=twsrc%5Etfw\">27 juin 2024<\/a><\/p><\/blockquote>\n<p><script async src=\"https:\/\/platform.twitter.com\/widgets.js\" charset=\"utf-8\"><\/script><\/p>\n<h2>Importance<\/h2>\n<p><span style=\"font-weight: 400;\">La capacit\u00e9 \u00e0 pr\u00e9dire des structures peptidiques tr\u00e8s pr\u00e9cises a des implications majeures pour le d\u00e9veloppement de th\u00e9rapies bas\u00e9es sur les peptides.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">\"Les peptides ont \u00e9t\u00e9 au centre du mod\u00e8le PepFlow parce qu'ils sont des mol\u00e9cules biologiques tr\u00e8s importantes et qu'ils sont naturellement tr\u00e8s dynamiques, de sorte que nous devons mod\u00e9liser leurs diff\u00e9rentes conformations pour comprendre leur fonction\", a expliqu\u00e9 le Dr. <span class=\"noTranslate\" data-no-translation=\"\">Philip M. Kim<\/span>, l'investigateur principal de l'\u00e9tude.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">\"Ils sont \u00e9galement importants sur le plan th\u00e9rapeutique, comme le montrent les analogues du GLP1, tels que l'Ozempic, utilis\u00e9s pour traiter le diab\u00e8te et l'ob\u00e9sit\u00e9\".<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Les m\u00e9dicaments peptidiques pr\u00e9sentent plusieurs avantages par rapport aux m\u00e9dicaments traditionnels \u00e0 base de petites mol\u00e9cules et aux produits th\u00e9rapeutiques \u00e0 base de prot\u00e9ines de plus grande taille. Ils agissent de mani\u00e8re plus sp\u00e9cifique, sont moins toxiques que les m\u00e9dicaments \u00e0 petites mol\u00e9cules et sont moins chers et plus faciles \u00e0 produire que les m\u00e9dicaments \u00e0 base de prot\u00e9ines plus importantes.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">PepFlow pourrait acc\u00e9l\u00e9rer la d\u00e9couverte et le d\u00e9veloppement de nouveaux m\u00e9dicaments \u00e0 base de peptides en permettant la conception de peptides dot\u00e9s de propri\u00e9t\u00e9s th\u00e9rapeutiques.<\/span><\/p>\n<p>\"Il a fallu deux ans et demi pour d\u00e9velopper PepFlow et un mois pour l'entra\u00eener, mais cela valait la peine de passer \u00e0 la fronti\u00e8re suivante, au-del\u00e0 des mod\u00e8les qui ne pr\u00e9disent qu'une seule structure d'un peptide\", conclut M. Abdin.<\/p>\n<p>Cela fait suite \u00e0 la publication de\u00a0<a href=\"https:\/\/dailyai.com\/fr\/2024\/06\/evolutionaryscales-esm3-a-generative-model-for-biology\/\">EvolutionaryScale ESM3 cette semaine<\/a>un mod\u00e8le g\u00e9n\u00e9ratif fronti\u00e8re pour la biologie, qui se concentre \u00e9galement sur les prot\u00e9ines.<\/p>","protected":false},"excerpt":{"rendered":"<p>Des scientifiques du centre Donelly de l'universit\u00e9 de Toronto ont mis au point un mod\u00e8le d'intelligence artificielle de pointe, appel\u00e9 PepFlow, capable de pr\u00e9dire les diverses formes adopt\u00e9es par les peptides avec une pr\u00e9cision sans pr\u00e9c\u00e9dent.  Les peptides sont de petites mol\u00e9cules compos\u00e9es d'acides amin\u00e9s, les \u00e9l\u00e9ments constitutifs des prot\u00e9ines.  Si les peptides sont semblables aux prot\u00e9ines, ils sont beaucoup plus petits et plus souples, ce qui leur permet de se plier en une grande vari\u00e9t\u00e9 de formes.  La forme sp\u00e9cifique d'un peptide est cruciale car elle d\u00e9termine la mani\u00e8re dont il interagit avec d'autres mol\u00e9cules dans le corps, ce qui dicte sa fonction biologique. La pr\u00e9diction des structures des prot\u00e9ines et des peptides est un enjeu de longue date.<\/p>","protected":false},"author":2,"featured_media":13152,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[88],"tags":[353,204,178],"class_list":["post-13145","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-ethics","tag-biology","tag-healthcare","tag-medicine"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>University of Toronto researchers build peptide prediction model that beats AlphaFold 2 | 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\/fr\/2024\/06\/university-of-toronto-researchers-build-peptide-prediction-model-that-beats-alphafold-2\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"University of Toronto researchers build peptide prediction model that beats AlphaFold 2 | DailyAI\" \/>\n<meta property=\"og:description\" content=\"Scientists at the University of Toronto&#8217;s Donelly Centre have developed a cutting-edge AI model called PepFlow that can predict the diverse shapes that peptides adopt with unprecedented accuracy.\u00a0 Peptides are small molecules made up of amino acids, the building blocks of proteins.\u00a0 While peptides are similar to proteins, they\u2019re much smaller and more flexible, allowing them to fold into a huge variety of shapes.\u00a0 A peptide&#8217;s specific shape is crucial because it determines how it interacts with other molecules in the body, which in turn dictates its biological function. Predicting the structures of proteins and peptides has been a longstanding\" \/>\n<meta property=\"og:url\" content=\"https:\/\/dailyai.com\/fr\/2024\/06\/university-of-toronto-researchers-build-peptide-prediction-model-that-beats-alphafold-2\/\" \/>\n<meta property=\"og:site_name\" content=\"DailyAI\" \/>\n<meta property=\"article:published_time\" content=\"2024-06-28T10:17:24+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2024-07-01T11:19:48+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/dailyai.com\/wp-content\/uploads\/2024\/06\/DALL\u00b7E-2024-06-28-11.28.34-Create-a-high-quality-smooth-landscape-image-focusing-on-peptides-in-a-futuristic-lab-environment.-The-image-should-display-clear-molecular-structure.webp\" \/>\n\t<meta property=\"og:image:width\" content=\"1792\" \/>\n\t<meta property=\"og:image:height\" content=\"1024\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/webp\" \/>\n<meta name=\"author\" content=\"Sam Jeans\" \/>\n<meta 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