{"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\/pt\/2024\/06\/university-of-toronto-researchers-build-peptide-prediction-model-that-beats-alphafold-2\/","title":{"rendered":"Investigadores da Universidade de Toronto criam modelo de previs\u00e3o de p\u00e9ptidos que bate o AlphaFold 2"},"content":{"rendered":"<p><b>Cientistas do Centro Donelly da Universidade de Toronto desenvolveram um modelo de IA de ponta chamado PepFlow que consegue prever as diversas formas que os p\u00e9ptidos adoptam com uma precis\u00e3o sem precedentes.\u00a0<\/b><\/p>\n<p><span style=\"font-weight: 400;\">Os p\u00e9ptidos s\u00e3o pequenas mol\u00e9culas constitu\u00eddas por amino\u00e1cidos, os blocos de constru\u00e7\u00e3o das prote\u00ednas.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Embora os p\u00e9ptidos sejam semelhantes \u00e0s prote\u00ednas, s\u00e3o muito mais pequenos e flex\u00edveis, o que lhes permite dobrarem-se numa enorme variedade de formas.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">A forma espec\u00edfica de um p\u00e9ptido \u00e9 crucial porque determina a forma como interage com outras mol\u00e9culas no corpo, o que, por sua vez, dita a sua fun\u00e7\u00e3o biol\u00f3gica.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Prever as estruturas de prote\u00ednas e p\u00e9ptidos tem sido um desafio de longa data na biologia. Devido \u00e0 complexidade da matem\u00e1tica envolvida, \u00e9 um excelente problema para a aprendizagem autom\u00e1tica.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Nos \u00faltimos anos, modelos de IA como <\/span><a href=\"https:\/\/dailyai.com\/pt\/2024\/05\/alphafold-3-deepmind-evolves-its-ai-protein-folding-project\/\"><span style=\"font-weight: 400;\">AlphaFold 2 e 3<\/span><\/a><span style=\"font-weight: 400;\">desenvolvidos pela DeepMind da Google, revolucionaram a previs\u00e3o da estrutura das prote\u00ednas.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">O AlphaFold2 utiliza a aprendizagem profunda para prever a estrutura 3D mais prov\u00e1vel de uma prote\u00edna com base na sua sequ\u00eancia de amino\u00e1cidos. Mas o w<\/span><span style=\"font-weight: 400;\">mbora o AlphaFold2 tenha sido incrivelmente bem sucedido no caso das prote\u00ednas, tem limita\u00e7\u00f5es quando se trata de mol\u00e9culas altamente flex\u00edveis como os p\u00e9ptidos.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">\"At\u00e9 agora, n\u00e3o t\u00ednhamos conseguido modelar toda a gama de conforma\u00e7\u00f5es dos p\u00e9ptidos\". <\/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;\">afirmou Osama Abdin<\/span><\/a><span style=\"font-weight: 400;\">O primeiro autor do estudo.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Pepflow, documentado numa <a href=\"https:\/\/www.nature.com\/articles\/s42256-024-00860-4\" target=\"_blank\" rel=\"noopener\">estudo publicado<\/a> na Nature Machine Intelligence, \"utiliza a aprendizagem profunda para captar as conforma\u00e7\u00f5es precisas e exactas de um p\u00e9ptido em poucos minutos\".<\/span><\/p>\n<p><span style=\"font-weight: 400;\">O PepFlow utiliza modelos de IA inspirados em <span class=\"noTranslate\" data-no-translation=\"\">Boltzmann generators.<\/span> Estes modelos aprendem os princ\u00edpios f\u00edsicos fundamentais que regem a forma como a estrutura qu\u00edmica de um p\u00e9ptido determina o seu espetro de formas poss\u00edveis.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Isto permite ao PepFlow prever com precis\u00e3o as estruturas de p\u00e9ptidos com caracter\u00edsticas invulgares, tais como p\u00e9ptidos circulares formados atrav\u00e9s de macrocicliza\u00e7\u00e3o. Os p\u00e9ptidos macroc\u00edclicos s\u00e3o particularmente interessantes para o desenvolvimento de medicamentos devido \u00e0s suas propriedades de liga\u00e7\u00e3o \u00fanicas.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">O que distingue o PepFlow de modelos como o AlphaFold2 \u00e9 a sua capacidade de prever n\u00e3o apenas uma estrutura, mas toda a \"paisagem energ\u00e9tica\" de um p\u00e9ptido.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">A paisagem energ\u00e9tica representa todas as formas poss\u00edveis que um p\u00e9ptido pode assumir e como transita entre estas diferentes conforma\u00e7\u00f5es.<\/span><\/p>\n<p><span style=\"font-weight: 400;\"> A capta\u00e7\u00e3o desta complexidade estrutural \u00e9 fundamental para u<\/span><span style=\"font-weight: 400;\">Compreender o funcionamento dos p\u00e9ptidos em diferentes contextos biol\u00f3gicos.<\/span><\/p>\n<blockquote class=\"twitter-tweet\">\n<p dir=\"ltr\" lang=\"en\">Os investigadores do <a href=\"https:\/\/twitter.com\/UofT?ref_src=twsrc%5Etfw\">@UofT<\/a> desenvolveram um <a href=\"https:\/\/twitter.com\/hashtag\/DeepLearning?src=hash&amp;ref_src=twsrc%5Etfw\">#DeepLearning<\/a> chamado PepFlow, que pode prever todas as formas poss\u00edveis de p\u00e9ptidos.<\/p>\n<p>O PepFlow pode informar o desenvolvimento de medicamentos atrav\u00e9s da conce\u00e7\u00e3o de p\u00e9ptidos que actuam como ligantes. <a href=\"https:\/\/twitter.com\/hashtag\/DrugDiscovery?src=hash&amp;ref_src=twsrc%5Etfw\">#Descoberta de medicamentos<\/a><\/p>\n<p>Saiba mais \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>- Centro Donnelly (@DonnellyCentre) <a href=\"https:\/\/twitter.com\/DonnellyCentre\/status\/1806328554348527953?ref_src=twsrc%5Etfw\">27 de junho de 2024<\/a><\/p><\/blockquote>\n<p><script async src=\"https:\/\/platform.twitter.com\/widgets.js\" charset=\"utf-8\"><\/script><\/p>\n<h2>Significado<\/h2>\n<p><span style=\"font-weight: 400;\">A capacidade de prever estruturas de p\u00e9ptidos com elevada precis\u00e3o tem implica\u00e7\u00f5es importantes para o desenvolvimento de terap\u00eauticas baseadas em p\u00e9ptidos.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">\"Os p\u00e9ptidos foram o foco do modelo PepFlow porque s\u00e3o mol\u00e9culas biol\u00f3gicas muito importantes e s\u00e3o naturalmente muito din\u00e2micas, pelo que precisamos de modelar as suas diferentes conforma\u00e7\u00f5es para compreender a sua fun\u00e7\u00e3o\", explicou <span class=\"noTranslate\" data-no-translation=\"\">Philip M. Kim<\/span>o investigador principal do estudo.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">\"S\u00e3o tamb\u00e9m importantes como terap\u00eautica, como se pode ver pelos an\u00e1logos do GLP1, como o Ozempic, utilizados para tratar a diabetes e a obesidade.\"<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Os f\u00e1rmacos pept\u00eddicos t\u00eam v\u00e1rias vantagens em rela\u00e7\u00e3o aos f\u00e1rmacos tradicionais de pequenas mol\u00e9culas e \u00e0s terap\u00eauticas \u00e0 base de prote\u00ednas de maiores dimens\u00f5es. S\u00e3o mais espec\u00edficos nas suas ac\u00e7\u00f5es, t\u00eam menor toxicidade do que os f\u00e1rmacos de pequenas mol\u00e9culas e s\u00e3o mais baratos e f\u00e1ceis de produzir do que os f\u00e1rmacos \u00e0 base de prote\u00ednas maiores.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">O PepFlow poder\u00e1 acelerar a descoberta e o desenvolvimento de novos medicamentos \u00e0 base de p\u00e9ptidos, permitindo a conce\u00e7\u00e3o de p\u00e9ptidos com propriedades terap\u00eauticas.<\/span><\/p>\n<p>\"Foram necess\u00e1rios dois anos e meio para desenvolver o PepFlow e um m\u00eas para o treinar, mas valeu a pena avan\u00e7ar para a pr\u00f3xima fronteira, para al\u00e9m dos modelos que apenas prev\u00eaem uma estrutura de um p\u00e9ptido\", concluiu Abdin.<\/p>\n<p>Isto segue-se ao lan\u00e7amento de\u00a0<a href=\"https:\/\/dailyai.com\/pt\/2024\/06\/evolutionaryscales-esm3-a-generative-model-for-biology\/\">EvolutionaryScale ESM3 esta semana<\/a>, um modelo generativo de fronteira para a biologia, que tamb\u00e9m se centra nas prote\u00ednas.<\/p>","protected":false},"excerpt":{"rendered":"<p>Cientistas do Centro Donelly da Universidade de Toronto desenvolveram um modelo de IA de ponta chamado PepFlow que consegue prever as diversas formas que os p\u00e9ptidos adoptam com uma precis\u00e3o sem precedentes.  Os p\u00e9ptidos s\u00e3o pequenas mol\u00e9culas constitu\u00eddas por amino\u00e1cidos, os blocos de constru\u00e7\u00e3o das prote\u00ednas.  Embora os p\u00e9ptidos sejam semelhantes \u00e0s prote\u00ednas, s\u00e3o muito mais pequenos e flex\u00edveis, o que lhes permite dobrarem-se numa enorme variedade de formas.  A forma espec\u00edfica de um p\u00e9ptido \u00e9 crucial porque determina a forma como interage com outras mol\u00e9culas no corpo, o que, por sua vez, dita a sua fun\u00e7\u00e3o biol\u00f3gica. A previs\u00e3o das estruturas das prote\u00ednas e dos p\u00e9ptidos tem sido uma tarefa de longa data<\/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\/pt\/2024\/06\/university-of-toronto-researchers-build-peptide-prediction-model-that-beats-alphafold-2\/\" \/>\n<meta property=\"og:locale\" content=\"pt_PT\" \/>\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\/pt\/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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