{"id":47382,"date":"2025-05-11T11:05:08","date_gmt":"2025-05-11T05:35:08","guid":{"rendered":"https:\/\/vajiramandravi.com\/current-affairs\/?p=47382"},"modified":"2025-05-29T12:17:30","modified_gmt":"2025-05-29T06:47:30","slug":"rna-exosomopathies","status":"publish","type":"post","link":"https:\/\/vajiramandravi.com\/current-affairs\/rna-exosomopathies\/","title":{"rendered":"RNA Exosomopathies"},"content":{"rendered":"<h2>RNA Exosomopathies Latest News<\/h2>\n<p>Researchers at Emory University and the University of Texas Health Science Centre have shown that mutations causing brain defects in humans also produce similar effects in budding yeast (Saccharomyces cerevisiae), a simpler eukaryotic organism.<\/p>\n<h2>What was discovered?<\/h2>\n<ul>\n<li>These mutations affect a\u00a0<strong>cellular complex called the RNA exosome<\/strong>, which plays a critical role in\u00a0<strong>RNA processing, surveillance, and degradation<\/strong>.<\/li>\n<li>This reveals the potential to use\u00a0<strong>yeast as a model organism<\/strong>\u00a0for studying\u00a0<strong>human neurological disorders<\/strong>, particularly those related to\u00a0<strong>RNA exosome dysfunction<\/strong>.<\/li>\n<\/ul>\n<h2>What are RNA Exosomopathies?<\/h2>\n<ul>\n<li><strong>RNA exosomopathies<\/strong>\u00a0are disorders caused by\u00a0<strong>mutations in genes coding for RNA exosome components<\/strong>.<\/li>\n<li>These disorders primarily lead to\u00a0<strong>brain maldevelopment<\/strong>, affecting structures like the\u00a0<strong>pons<\/strong>\u00a0and\u00a0<strong>cerebellum<\/strong>.<\/li>\n<li>A key example is\u00a0<strong>Pontocerebellar Hypoplasia Type 1 (PCH1)<\/strong>, which results in\u00a0<strong>severe motor, cognitive, and developmental impairments<\/strong>\u00a0in infants.<\/li>\n<\/ul>\n<h2>Role of the RNA Exosome<\/h2>\n<ul>\n<li>The\u00a0<strong>RNA exosome<\/strong>\u00a0is a\u00a0<strong>multi-protein complex<\/strong>\u00a0discovered in yeast in 1997.<\/li>\n<li>It is responsible for:\n<ul>\n<li><strong>Processing<\/strong>,\u00a0<strong>surveillance<\/strong>, and\u00a0<strong>degradation<\/strong>\u00a0of different types of\u00a0<strong>RNA molecules<\/strong>.<\/li>\n<li>Maturation of\u00a0<strong>ribosomal RNA (rRNA)<\/strong>\u00a0\u2013 essential for building\u00a0<strong>ribosomes<\/strong>.<\/li>\n<li>Elimination of faulty\u00a0<strong>messenger RNA (mRNA)<\/strong>\u00a0and regulation of\u00a0<strong>non-coding RNAs (ncRNA)<\/strong>.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h3>Experimental Findings (Study 1 \u2013 Journal\u00a0<i>RNA<\/i>)<\/h3>\n<ul>\n<li>Researchers\u00a0<strong>introduced human disease mutations<\/strong>\u00a0into corresponding yeast genes.<\/li>\n<li>Found\u00a0<strong>defects<\/strong>\u00a0in:\n<ul>\n<li><strong>RNA surveillance<\/strong><\/li>\n<li><strong>Ribosome production<\/strong><\/li>\n<li><strong>Protein synthesis<\/strong><\/li>\n<\/ul>\n<\/li>\n<li>Each mutation had a\u00a0<strong>distinct molecular signature<\/strong>, explaining the\u00a0<strong>varied clinical symptoms<\/strong>\u00a0in patients.<\/li>\n<\/ul>\n<h3>\u00a0Creation of a Humanised Yeast Model (Study 2 \u2013 Journal\u00a0<i>G3<\/i>)<\/h3>\n<ul>\n<li>Scientists\u00a0<strong>replaced segments<\/strong>\u00a0of yeast RNA exosome with\u00a0<strong>human or mouse genes<\/strong>.<\/li>\n<li>Of 9 core proteins,\u00a0<strong>6 were successfully replaced<\/strong>, with\u00a0<strong>3 supporting normal yeast growth<\/strong>.<\/li>\n<li>Introduced known\u00a0<strong>brain-defect mutations<\/strong>\u00a0into this model.<\/li>\n<li>Proved that mutations\u00a0<strong>directly impair RNA exosome function<\/strong>\u00a0and are not mediated through indirect processes.<\/li>\n<\/ul>\n<h2>Why Yeast?<\/h2>\n<ul>\n<li><strong>Yeast is a simple eukaryote<\/strong>, easy to genetically modify and culture.<\/li>\n<li>Offers a\u00a0<strong>cost-effective and fast<\/strong>\u00a0method for testing hypotheses and potential\u00a0<strong>drug interventions<\/strong>.<\/li>\n<li>Using yeast models allows\u00a0<strong>rapid screening<\/strong>\u00a0of\u00a0<strong>RNA exosome mutations<\/strong>\u00a0and their\u00a0<strong>functional consequences<\/strong>.<\/li>\n<\/ul>\n<h2>RNA Exosomopathies FAQs<\/h2>\n<p><strong>Q1.\u00a0<\/strong>What are RNA Exosomopathies?<br \/>\n<strong>Ans:<\/strong>\u00a0RNA Exosomopathies are a group of genetic disorders caused by mutations in the RNA exosome complex, which regulates RNA degradation and processing in cells.<\/p>\n<p><strong>Q2.\u00a0<\/strong>What are the common symptoms of RNA exosomopathies?<br \/>\n<strong>Ans:<\/strong>\u00a0Symptoms vary but often include neurodevelopmental delays, skeletal abnormalities, and immune dysfunction, depending on the mutation.<\/p>\n<p><strong>Source:\u00a0<\/strong><a href=\"https:\/\/www.thehindu.com\/sci-tech\/science\/the-curious-case-of-the-yeast-modified-to-develop-brain-defects\/article69537390.ece#:~:text=Researchers%20at%20Emory%20University%20and,budding%20yeast%2C%20a%20simpler%20organism\" target=\"_blank\" rel=\"nofollow noopener\">TH<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>RNA Exosomopathies are a group of genetic disorders caused by mutations in the RNA exosome complex, which regulates RNA degradation and processing in cells.<\/p>\n","protected":false},"author":8,"featured_media":47390,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1],"tags":[21,23],"class_list":{"0":"post-47382","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-upsc-prelims-current-affairs","8":"tag-prelims-pointers","9":"tag-upsc-prelims-current-affairs","10":"no-featured-image-padding"},"acf":[],"_links":{"self":[{"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/posts\/47382","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/users\/8"}],"replies":[{"embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/comments?post=47382"}],"version-history":[{"count":0,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/posts\/47382\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/media\/47390"}],"wp:attachment":[{"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/media?parent=47382"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/categories?post=47382"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/tags?post=47382"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}