{"id":12117,"date":"2024-05-10T18:23:39","date_gmt":"2024-05-10T18:23:39","guid":{"rendered":"https:\/\/dailyai.com\/?p=12117"},"modified":"2024-05-12T19:00:09","modified_gmt":"2024-05-12T19:00:09","slug":"alphafold-3-deepmind-evolves-its-ai-protein-folding-project","status":"publish","type":"post","link":"https:\/\/dailyai.com\/pt\/2024\/05\/alphafold-3-deepmind-evolves-its-ai-protein-folding-project\/","title":{"rendered":"AlphaFold 3: DeepMind evolui o seu projeto de dobragem de prote\u00ednas por IA"},"content":{"rendered":"<p><b><span class=\"noTranslate\" data-no-translation=\"\"><span class=\"noTranslate\" data-no-translation=\"\"><span class=\"noTranslate\" data-no-translation=\"\"><span class=\"noTranslate\" data-no-translation=\"\"><span class=\"noTranslate\" data-no-translation=\"\"><span class=\"noTranslate\" data-no-translation=\"\"><span class=\"noTranslate\" data-no-translation=\"\"><span class=\"noTranslate\" data-no-translation=\"\"><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><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span> anunciado <span class=\"noTranslate\" data-no-translation=\"\">AlphaFold 3<\/span>, a \u00faltima itera\u00e7\u00e3o do seu projeto de dobragem de prote\u00ednas. <\/b><\/p>\n<p><span style=\"font-weight: 400;\"><span class=\"noTranslate\" data-no-translation=\"\">AlphaFold 3<\/span>Tal como os seus antecessores, prev\u00ea principalmente a forma como as prote\u00ednas se dobram com base nas suas sequ\u00eancias de amino\u00e1cidos. <\/span><\/p>\n<p><span style=\"font-weight: 400;\">As prote\u00ednas, os blocos de constru\u00e7\u00e3o de toda a vida org\u00e2nica, s\u00e3o compostas por longas cadeias de amino\u00e1cidos que se dobram como \"origami\" em estruturas 3D que determinam as suas fun\u00e7\u00f5es.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">A compreens\u00e3o da forma como estas estruturas se dobram abre a porta \u00e0 decifra\u00e7\u00e3o dos mecanismos moleculares que est\u00e3o na base da sa\u00fade e da doen\u00e7a.<\/span><\/p>\n<p>Por exemplo, em alguns casos, as prote\u00ednas podem ficar mal dobradas, o que perturba a sua fun\u00e7\u00e3o normal e contribui para o desenvolvimento de doen\u00e7as como a doen\u00e7a de Alzheimer e a doen\u00e7a de Parkinson.<\/p>\n<p>A dobragem incorrecta pode interferir com a sa\u00fade celular atrav\u00e9s da acumula\u00e7\u00e3o de prote\u00ednas disfuncionais que podem danificar as c\u00e9lulas e os tecidos.<\/p>\n<p class=\"whitespace-pre-wrap break-words\">Ao desvendar os mecanismos subjacentes a este processo, os cientistas podem desenvolver f\u00e1rmacos que eliminem eficazmente as prote\u00ednas mal dobradas acumuladas no organismo ou interven\u00e7\u00f5es que impe\u00e7am a ocorr\u00eancia de mal dobradas.<\/p>\n<p><iframe loading=\"lazy\" title=\"A dobragem das prote\u00ednas explicada\" width=\"1080\" height=\"608\" src=\"https:\/\/www.youtube.com\/embed\/KpedmJdrTpY?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe><\/p>\n<h2>Apresenta\u00e7\u00e3o do AlphaFold 3<\/h2>\n<p><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=\"\"><span class=\"noTranslate\" data-no-translation=\"\"><span class=\"noTranslate\" data-no-translation=\"\"><span class=\"noTranslate\" data-no-translation=\"\"><span class=\"noTranslate\" data-no-translation=\"\"><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><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span> recentemente anunciado <\/span><a href=\"https:\/\/blog.google\/technology\/ai\/google-deepmind-isomorphic-alphafold-3-ai-model\/\" target=\"_blank\" rel=\"noopener\"><span style=\"font-weight: 400;\">AlphaFold 3<\/span><\/a><span style=\"font-weight: 400;\">que inclui uma vers\u00e3o melhorada do m\u00f3dulo Evoformer, parte da arquitetura de aprendizagem profunda subjacente ao AlphaFold 2. <\/span><\/p>\n<p><span style=\"font-weight: 400;\">Quando o m\u00f3dulo Evoformer processa as mol\u00e9culas de entrada, o AlphaFold 3 utiliza uma nova rede de difus\u00e3o para montar as estruturas previstas.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Esta rede \u00e9 semelhante \u00e0s utilizadas em geradores de imagens de IA como <span class=\"noTranslate\" data-no-translation=\"\"><span class=\"noTranslate\" data-no-translation=\"\"><span class=\"noTranslate\" data-no-translation=\"\"><span class=\"noTranslate\" data-no-translation=\"\"><span class=\"noTranslate\" data-no-translation=\"\"><span class=\"noTranslate\" data-no-translation=\"\"><span class=\"noTranslate\" data-no-translation=\"\"><span class=\"noTranslate\" data-no-translation=\"\"><span class=\"noTranslate\" data-no-translation=\"\"><span class=\"noTranslate\" data-no-translation=\"\"><span class=\"noTranslate\" data-no-translation=\"\"><span class=\"noTranslate\" data-no-translation=\"\">DALL-E<\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span>. Come\u00e7a com uma \"nuvem\" de \u00e1tomos e refina iterativamente a estrutura ao longo de uma s\u00e9rie de passos at\u00e9 convergir para uma configura\u00e7\u00e3o molecular final, provavelmente exacta. <\/span><\/p>\n<p><span style=\"font-weight: 400;\">O modelo AlphaFold 3 evoluiu para al\u00e9m das prote\u00ednas - tamb\u00e9m capta as interac\u00e7\u00f5es do ADN, ARN e ligandos. Um ligando \u00e9 uma mol\u00e9cula que se liga a outra mol\u00e9cula, tipicamente uma prote\u00edna, para formar um complexo e frequentemente desencadeia uma resposta biol\u00f3gica ou uma altera\u00e7\u00e3o na fun\u00e7\u00e3o da prote\u00edna.<\/span><\/p>\n<p><a href=\"https:\/\/www.isomorphiclabs.com\/\" target=\"_blank\" rel=\"noopener\"><span style=\"font-weight: 400;\">Laborat\u00f3rios Isomorphic<\/span><\/a><span style=\"font-weight: 400;\">, que colaborou com <span class=\"noTranslate\" data-no-translation=\"\"><span class=\"noTranslate\" data-no-translation=\"\"><span class=\"noTranslate\" data-no-translation=\"\"><span class=\"noTranslate\" data-no-translation=\"\"><span class=\"noTranslate\" data-no-translation=\"\"><span class=\"noTranslate\" data-no-translation=\"\"><span class=\"noTranslate\" data-no-translation=\"\"><span class=\"noTranslate\" data-no-translation=\"\"><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><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span> no projeto AlphaFold 3, j\u00e1 est\u00e1 a trabalhar com empresas farmac\u00eauticas, aplicando o modelo a desafios reais de conce\u00e7\u00e3o de medicamentos.\u00a0<\/span><\/p>\n<p><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=\"\"><span class=\"noTranslate\" data-no-translation=\"\"><span class=\"noTranslate\" data-no-translation=\"\"><span class=\"noTranslate\" data-no-translation=\"\"><span class=\"noTranslate\" data-no-translation=\"\"><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><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span> lan\u00e7ou tamb\u00e9m o projeto <\/span><a href=\"https:\/\/alphafoldserver.com\/\" target=\"_blank\" rel=\"noopener\"><span style=\"font-weight: 400;\">Servidor AlphaFold<\/span><\/a><span style=\"font-weight: 400;\">uma plataforma gratuita e de f\u00e1cil utiliza\u00e7\u00e3o que permite aos investigadores tirar partido do poder do AlphaFold 3 sem grandes recursos computacionais ou conhecimentos especializados em aprendizagem autom\u00e1tica.\u00a0<\/span><\/p>\n<h2>Uma breve hist\u00f3ria do projeto AlphaFold<\/h2>\n<p><span style=\"font-weight: 400;\">Antes da aprendizagem autom\u00e1tica, calcular o n\u00famero de configura\u00e7\u00f5es que uma prote\u00edna poderia assumir era astronomicamente moroso.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">O projeto AlphaFold teve in\u00edcio em 2016 e terminou em 2018, pouco depois da vit\u00f3ria hist\u00f3rica do AlphaGo contra Lee Sedol, um dos melhores jogadores internacionais de Go.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Em 2018, <span class=\"noTranslate\" data-no-translation=\"\"><span class=\"noTranslate\" data-no-translation=\"\"><span class=\"noTranslate\" data-no-translation=\"\"><span class=\"noTranslate\" data-no-translation=\"\"><span class=\"noTranslate\" data-no-translation=\"\"><span class=\"noTranslate\" data-no-translation=\"\"><span class=\"noTranslate\" data-no-translation=\"\"><span class=\"noTranslate\" data-no-translation=\"\"><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><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span> estreou o AlphaFold 1, a primeira vers\u00e3o do sistema de IA, na <\/span><a href=\"https:\/\/predictioncenter.org\/casp13\/\" target=\"_blank\" rel=\"noopener\"><span style=\"font-weight: 400;\">CASP13<\/span><\/a><span style=\"font-weight: 400;\"> (Critical Assessment of Protein Structure Prediction) challenge.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Este concurso bienal re\u00fane grupos de investiga\u00e7\u00e3o de todo o mundo para testar a exatid\u00e3o das suas previs\u00f5es de estruturas proteicas em rela\u00e7\u00e3o a dados experimentais reais.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">O AlphaFold 1 ficou em primeiro lugar no concurso, um marco importante na biologia computacional.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Dois anos mais tarde, na CASP14 em 2020, <span class=\"noTranslate\" data-no-translation=\"\"><span class=\"noTranslate\" data-no-translation=\"\"><span class=\"noTranslate\" data-no-translation=\"\"><span class=\"noTranslate\" data-no-translation=\"\"><span class=\"noTranslate\" data-no-translation=\"\"><span class=\"noTranslate\" data-no-translation=\"\"><span class=\"noTranslate\" data-no-translation=\"\"><span class=\"noTranslate\" data-no-translation=\"\"><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><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span> apresentou o AlphaFold 2, demonstrando uma exatid\u00e3o t\u00e3o elevada que a comunidade cient\u00edfica considerou o problema da dobragem de prote\u00ednas essencialmente resolvido.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">O desempenho do AlphaFold 2 foi not\u00e1vel. Atingiu uma pontua\u00e7\u00e3o de precis\u00e3o m\u00e9dia de 92,4 GDT (Global Distance Test) em todos os objectivos.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Para colocar isto em perspetiva, uma pontua\u00e7\u00e3o de 90 GDT \u00e9 considerada competitiva com os resultados obtidos atrav\u00e9s de m\u00e9todos experimentais. O artigo sobre os m\u00e9todos do AlphaFold 2 recebeu desde ent\u00e3o mais de 20.000 cita\u00e7\u00f5es, o que o coloca entre os 500 artigos mais citados em todos os dom\u00ednios cient\u00edficos.<\/span><span style=\"font-weight: 400;\">\u00a0<\/span><\/p>\n<p>A AlphaFold tem sido fundamental em numerosos projectos de investiga\u00e7\u00e3o inovadores, como o estudo de prote\u00ednas que podem degradar poluentes ambientais, como os pl\u00e1sticos, e melhorar a nossa compreens\u00e3o de doen\u00e7as tropicais pouco comuns, como a leishmaniose e a doen\u00e7a de Chagas.<\/p>\n<p><iframe loading=\"lazy\" title=\"AlphaFold: A cria\u00e7\u00e3o de uma descoberta cient\u00edfica\" width=\"1080\" height=\"608\" src=\"https:\/\/www.youtube.com\/embed\/gg7WjuFs8F4?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe><\/p>\n<p><span style=\"font-weight: 400;\">Em julho de 2021, <span class=\"noTranslate\" data-no-translation=\"\"><span class=\"noTranslate\" data-no-translation=\"\"><span class=\"noTranslate\" data-no-translation=\"\"><span class=\"noTranslate\" data-no-translation=\"\"><span class=\"noTranslate\" data-no-translation=\"\"><span class=\"noTranslate\" data-no-translation=\"\"><span class=\"noTranslate\" data-no-translation=\"\"><span class=\"noTranslate\" data-no-translation=\"\"><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><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span>em parceria com o Instituto Europeu de Bioinform\u00e1tica do EMBL (EMBL-EBI), lan\u00e7ou a base de dados de estruturas proteicas AlphaFold, que d\u00e1 acesso a mais de 350 000 previs\u00f5es de estruturas proteicas, incluindo o proteoma humano completo.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Desde ent\u00e3o, esta base de dados foi alargada para incluir mais de 200 milh\u00f5es de estruturas, abrangendo quase todas as prote\u00ednas catalogadas conhecidas pela ci\u00eancia.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">At\u00e9 \u00e0 data, a Base de Dados de Estruturas de Prote\u00ednas AlphaFold foi acedida por mais de um milh\u00e3o de utilizadores em mais de 190 pa\u00edses, permitindo descobertas em \u00e1reas que v\u00e3o desde a medicina \u00e0 agricultura e muito mais.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">O AlphaFold 3 marca mais uma itera\u00e7\u00e3o para este sistema de descoberta e an\u00e1lise de prote\u00ednas, o melhor da sua classe.\u00a0<\/span><\/p>","protected":false},"excerpt":{"rendered":"<p>A DeepMind anunciou o AlphaFold 3, a mais recente itera\u00e7\u00e3o do seu projeto de dobragem de prote\u00ednas. O AlphaFold 3, tal como os seus antecessores, prev\u00ea principalmente a forma como as prote\u00ednas se dobram com base nas suas sequ\u00eancias de amino\u00e1cidos. As prote\u00ednas, os blocos de constru\u00e7\u00e3o de toda a vida org\u00e2nica, s\u00e3o compostas por longas cadeias de amino\u00e1cidos que se dobram como \"origami\" em estruturas 3D que determinam as suas fun\u00e7\u00f5es.  A compreens\u00e3o da forma como estas estruturas se dobram abre a porta \u00e0 decifra\u00e7\u00e3o dos mecanismos moleculares que est\u00e3o na base da sa\u00fade e da doen\u00e7a. Por exemplo, nalguns casos, as prote\u00ednas podem ficar mal dobradas, o que perturba a sua fun\u00e7\u00e3o normal e contribui para o desenvolvimento de doen\u00e7as como a doen\u00e7a de Alzheimer e a doen\u00e7a de Parkinson. A dobragem incorrecta pode interferir<\/p>","protected":false},"author":2,"featured_media":12119,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[84],"tags":[604,147],"class_list":["post-12117","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-industry","tag-alphafold","tag-deepmind"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>AlphaFold 3: DeepMind evolves its AI protein folding project | 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\/05\/alphafold-3-deepmind-evolves-its-ai-protein-folding-project\/\" \/>\n<meta property=\"og:locale\" content=\"pt_PT\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"AlphaFold 3: DeepMind evolves its AI protein folding project | DailyAI\" \/>\n<meta property=\"og:description\" content=\"DeepMind announced AlphaFold 3, the latest iteration of its protein folding project. AlphaFold 3, like its predecessors, primarily predicts how proteins fold based on their amino acid sequences. Proteins, the building blocks of all organic life, comprise long chains of amino acids that fold like &#8216;origami&#8217; into 3D structures that determine their functions.\u00a0 Understanding how these structures fold opens the door to deciphering the molecular mechanisms that underpin health and disease. For example, in some cases, proteins can become misfolded, which disrupts their normal function and contributes to the development of diseases such as Alzheimer&#8217;s and Parkinson&#8217;s. 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