{"id":48490,"date":"2025-06-18T10:44:04","date_gmt":"2025-06-18T08:44:04","guid":{"rendered":"https:\/\/ellipse.prbb.org\/?p=48490"},"modified":"2025-06-18T10:43:57","modified_gmt":"2025-06-18T08:43:57","slug":"proteines-ancestrals-revelen-la-diversitat-genetica-dels-hominids-de-fa-2-milions-danys","status":"publish","type":"post","link":"https:\/\/ellipse.prbb.org\/ca\/proteines-ancestrals-revelen-la-diversitat-genetica-dels-hominids-de-fa-2-milions-danys\/","title":{"rendered":"Prote\u00efnes ancestrals revelen  la diversitat gen\u00e8tica dels hom\u00ednids de fa 2 milions d\u2019anys"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">Investigadors i investigadores de <strong><a rel=\"noreferrer noopener\" href=\"https:\/\/www.ibe.upf-csic.es\/\" target=\"_blank\">l\u2019Institut de Biologia Evolutiva (IBE:CSIC-UPF)<\/a><\/strong> han col\u00b7laborat en <a rel=\"noreferrer noopener\" href=\"https:\/\/www.ibe.upf-csic.es\/home\/-\/asset_publisher\/T2caeLMECPvW\/content\/ancient-proteins-unlock-biological-sex-and-genetic-variation-in-2-million-year-old-paranthropus-robustus-from-south-africa\/maximized\" target=\"_blank\">un estudi<\/a> dirigit per la <strong>Universitat de Copenhague<\/strong>, Dinamarca, i la <strong>Universitat de Ciutat del Cap<\/strong>, Sud-\u00e0frica, per recuperar amb \u00e8xit <strong>prote\u00efnes de dos milions d\u2019antiguitat de les dents dels <em>Paranthropus robustus <\/em><\/strong>trobats a la cova sudafricana de Swartkrans. Es tracta d\u2019algunes de <strong>les <a rel=\"noreferrer noopener\" href=\"https:\/\/ellipse.prbb.org\/ca\/recuperada-levidencia-genetica-humana-mes-antiga-fins-a-dia-davui\/\" target=\"_blank\">dades gen\u00e8tiques m\u00e9s antigues<\/a> d\u2019\u00c0frica<\/strong> i proporciona una visi\u00f3 poc freq\u00fcent d\u2019aquesta esp\u00e8cie extinta de caminar al\u00e7at que va conviure amb els primers <em>Homo<\/em> fa entre 2,8 i 1,2 milions d\u2019anys. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Els investigadors i investigadores han fet servir la <strong><a rel=\"noreferrer noopener\" href=\"https:\/\/ellipse.prbb.org\/ca\/la-paleoproteomica-ens-transporta-a-fa-2-milions-danys-i-resol-el-misteri-dun-simi-gegant-extinct\/\" target=\"_blank\">paleoprote\u00f2mica<\/a><\/strong>, una t\u00e8cnica que permet identificar seq\u00fc\u00e8ncies de prote\u00efnes en restes fossilitzades. Van extraure fragments de prote\u00efnes de l\u2019esmalt dental d\u2019aquestes restes i van utilitzar t\u00e8cniques d\u2019espectrometria de masses d\u2019\u00faltima generaci\u00f3 per reconstruir parcialment les seves seq\u00fc\u00e8ncies.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Les an\u00e0lisis <strong>van identificar el sexe biol\u00f2gic de quatre individus<\/strong> &#8211; dos mascles i dues femelles &#8211; mitjan\u00e7ant les variants de la prote\u00efna amelogenina. Tamb\u00e9 van revelar <strong>una inesperada diversitat gen\u00e8tica dins de l\u2019esp\u00e8cie<\/strong>, que posa en dubte les suposicions mantingudes durant molt temps i basades \u00fanicament en les caracter\u00edstiques esquel\u00e8tiques. Aquestes troballes suggereixen <strong>estructures de poblaci\u00f3 m\u00e9s complexes del que es pensava<\/strong>, que possiblement inclo\u00efen subgrups o llinatges emergents dins del <em>Paranthropus<\/em>, i subratllen la import\u00e0ncia d\u2019integrar les dades molecular amb els enfocs morfol\u00f2gics tradicionals.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Tot i les <strong>limitacions tecnol\u00f2giques degudes a la degradaci\u00f3<\/strong> de les prote\u00efnes amb el pas del temps, els resultats demostren que la paleoprote\u00f2mica pot descobrir informaci\u00f3 gen\u00e8tica i evolutiva valuosa partint de f\u00f2ssils antics. Aquest enfoc obre noves possibilitats per comprendre al primers ancestres humans a l\u2019\u00c0frica, on la <strong>recuperaci\u00f3 d\u2019<a rel=\"noreferrer noopener\" href=\"https:\/\/ellipse.prbb.org\/ca\/un-nou-marc-etic-per-a-la-recerca-amb-restes-humanes-antigues\/\" target=\"_blank\">ADN antic<\/a><\/strong> ha estat en gran manera infructuosa degut a les males condicions de conservaci\u00f3.<\/p>\n\n\n\n<div style=\"height:49px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Investigadors de l\u2019IBE col\u00b7laboren en la identificaci\u00f3 de les prote\u00efnes de les dents dels Paranthropus robustus de 2 milions d\u2019anys d\u2019antiguitat trobats a Sud-\u00e0frica. S\u00f3n les dades gen\u00e8tiques m\u00e9s antigues obtingudes d\u2019un hom\u00ednid afric\u00e0.<\/p>\n","protected":false},"author":34,"featured_media":48347,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[26],"tags":[297,283,211,329,620],"new-type":[35],"class_list":["post-48490","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-recerca","tag-biologia-molecular","tag-evolucio","tag-ibe-csic-upf","tag-proteines","tag-proteomica","new-type-noticies"],"acf":[],"_links":{"self":[{"href":"https:\/\/ellipse.prbb.org\/ca\/wp-json\/wp\/v2\/posts\/48490","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ellipse.prbb.org\/ca\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ellipse.prbb.org\/ca\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ellipse.prbb.org\/ca\/wp-json\/wp\/v2\/users\/34"}],"replies":[{"embeddable":true,"href":"https:\/\/ellipse.prbb.org\/ca\/wp-json\/wp\/v2\/comments?post=48490"}],"version-history":[{"count":4,"href":"https:\/\/ellipse.prbb.org\/ca\/wp-json\/wp\/v2\/posts\/48490\/revisions"}],"predecessor-version":[{"id":48504,"href":"https:\/\/ellipse.prbb.org\/ca\/wp-json\/wp\/v2\/posts\/48490\/revisions\/48504"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/ellipse.prbb.org\/ca\/wp-json\/wp\/v2\/media\/48347"}],"wp:attachment":[{"href":"https:\/\/ellipse.prbb.org\/ca\/wp-json\/wp\/v2\/media?parent=48490"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ellipse.prbb.org\/ca\/wp-json\/wp\/v2\/categories?post=48490"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ellipse.prbb.org\/ca\/wp-json\/wp\/v2\/tags?post=48490"},{"taxonomy":"new-type","embeddable":true,"href":"https:\/\/ellipse.prbb.org\/ca\/wp-json\/wp\/v2\/new-type?post=48490"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}