{"id":43137,"date":"2020-08-13T14:44:53","date_gmt":"2020-08-13T12:44:53","guid":{"rendered":"https:\/\/www.h-its.org\/de\/?p=43137"},"modified":"2020-12-16T10:12:02","modified_gmt":"2020-12-16T09:12:02","slug":"phylogenetische-analyse-von-sars-cov-2-daten","status":"publish","type":"post","link":"https:\/\/www.h-its.org\/de\/2020\/08\/13\/phylogenetische-analyse-von-sars-cov-2-daten\/","title":{"rendered":"Ein schwieriges Unterfangen: die phylogenetische Analyse von SARS-CoV-2-Daten"},"content":{"rendered":"\n<p><strong>Computerwissenschaftler\/-innen am HITS und KIT untersuchen die Probleme phylogenetischer Methoden bei der Analyse der Evolution des Coronavirus: viele Sequenzen, wenige Mutationen.<\/strong><\/p>\n\n\n\n<p>Tagt\u00e4glich werden zahlreiche wissenschaftliche Arbeiten zu verschiedenen Aspekten der Datenanalyse bei SARS-CoV-2 ver\u00f6ffentlicht, einschlie\u00dflich eines laufend aktualisierten Stammbaumes. In einer als <em>Preprint <\/em>erh\u00e4ltlichen Studie analysierten Wissenschaftler\/-innen der Forschungsgruppe <a rel=\"noreferrer noopener\" href=\"https:\/\/www.h-its.org\/de\/forschung\/cme\/\" target=\"_blank\">Computational Molecular Evolution group<\/a> (CME) am Heidelberger Institut f\u00fcr Theoretische Studien (HITS) und dem Institut f\u00fcr Theoretische Informatik am Karlsruher Institut f\u00fcr Technologie (KIT) nun alle Anfang Mai verf\u00fcgbaren Virus-Sequenzen. Dabei stellten sie fest, dass es schwierig war, auf der Grundlage dieser Daten einen verl\u00e4sslichen Stammbaum zu berechnen. Dies liegt vor allem an der gro\u00dfen Zahl von Sequenzen, die mit einer geringen Anzahl von Mutationen einhergeht. \u201eDie Daten enthalten ein extrem schwaches Signal\u201d, so CME-Gruppenleiter <a href=\"https:\/\/www.h-its.org\/de\/people\/prof-dr-alexandros-stamatakis\/\" target=\"_blank\" rel=\"noreferrer noopener\">Alexandros Stamatakis<\/a>.<\/p>\n\n\n\n<p>Die Forscher\/-innen fanden heraus, dass es nicht m\u00f6glich war, die Wurzel des Stammbaumes verl\u00e4sslich zu bestimmen \u2013 weder durch Hinzuf\u00fcgen von Fledermaus- und Schuppentier-Sequenzen zum Stammbaum noch durch die Anwendung neuester computergest\u00fctzter Methoden auf den Stammbaum des Virus beim Menschen. Auch eine automatische Klassifikation der Sequenzen war nicht m\u00f6glich, da die Sequenzen zu eng verwandt waren.<\/p>\n\n\n\n<p>Die Wissenschaftler\/-innen kommen zu dem Schluss, dass Stammbaumanalysen von SARS-CoV-2-Daten mit gro\u00dfer Vorsicht zu bewerten sind. \u201eMan sollte keinesfalls R\u00fcckschl\u00fcsse aus nur einem einzelnen Baum ziehen\u201d, so Alexandros Stamatakis.<\/p>\n\n\n\n<p>Die Studie wurde am 15. Dezember 2020 in &#8222;Molecular Biology and Evolution&#8220; ver\u00f6ffentlicht.<\/p>\n\n\n\n<p><strong>Phylogenetic analysis of SARS-CoV-2 data is difficult. <\/strong>Benoit Morel, Pierre Barbera, Lucas Czech, Ben Bettisworth, Lukas H\u00fcbner, Sarah Lutteropp, Dora Serdari, Evangelia-Georgia Kostaki, Ioannis Mamais, Alexey M Kozlov, Pavlos Pavlidis, Dimitrios Paraskevis, Alexandros Stamatakis: <a href=\"https:\/\/academic.oup.com\/mbe\/advance-article\/doi\/10.1093\/molbev\/msaa314\/6030946\" target=\"_blank\" rel=\"noreferrer noopener\">https:\/\/academic.oup.com\/mbe\/advance-article\/doi\/10.1093\/molbev\/msaa314\/6030946 <\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Computerwissenschaftler\/-innen am HITS und KIT untersuchen die Probleme phylogenetischer Methoden bei der Analyse der Evolution des Coronavirus: viele Sequenzen, wenige &#8230;<\/p>\n","protected":false},"author":6,"featured_media":43138,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"inline_featured_image":false,"footnotes":""},"categories":[1,92],"hits-research-group":[1282],"class_list":["post-43137","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-gruppen-news","category-wissenschaftsnews","hits-research-group-cme-de"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.2 - 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