{"id":156789,"date":"2026-02-27T19:08:40","date_gmt":"2026-02-27T17:08:40","guid":{"rendered":"https:\/\/kihulane.eu\/arhiiv\/156789"},"modified":"2026-02-27T20:09:10","modified_gmt":"2026-02-27T18:09:10","slug":"teadlased-joudsid-jareldusele-kuidas-vois-tekkida-nuudiselu-olilisim-alus-ribosoom","status":"publish","type":"post","link":"https:\/\/kihulane.eu\/arhiiv\/156789","title":{"rendered":"Teadlased j\u00f5udsid j\u00e4reldusele, kuidas v\u00f5is tekkida n\u00fc\u00fcdiselu olilisim alus \u2013 ribosoom"},"content":{"rendered":"
\"Teadlased<\/div>
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<\/figure-fullscreen>\n
\"Selline<\/div>
Selline on \u00fcks t\u00e4na rakkudess toimiva ribsoomi mudel. Aga see pole algusest peale \u00fcldse nii olnud.<\/span> Foto: Hybrid Medical Animation<\/span><\/span><\/figcaption><\/figure>\n<\/div>\n
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Loe kokkuv\u00f5tet<\/div>\n<\/div>\n<\/div>\n<\/div>\n
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Kuidas sai oma alguse raku \u00abvalgutehas\u00bb, mis loeb geneetilist koodi ja paneb kokku k\u00f5ik meie keha valgud? Ribosoom on nii h\u00e4davajalik ja samas nii keerukas, et selle teke tundub esmapilgul peaaegu v\u00f5imatu. Ometi viitab v\u00e4rske k\u00e4sitlus ajakirjas \u00abPNAS Nexus\u00bb, et vastus ei pruugi peituda t\u00e4iuslikkuse aeglases lihvimises. Teadlased pakuvad v\u00e4lja, et ribosoomi eelk\u00e4ija v\u00f5is olla m\u00e4rksa lihtsam ja s\u00f5ltuvam struktuur, kui seni arvatud. See l\u00e4henemine nihutab t\u00e4helepanu \u00fcksikult arenevalt molekulilt erinevate s\u00fcsteemide v\u00f5imalikule koost\u00f6\u00f6le. Nii kerkib esile m\u00f5te, et elu keerukus v\u00f5is s\u00fcndida partnerlusest, mitte \u00fcksildasest eneset\u00e4iendusest. Kas just selline ootamatu liit pani aluse mehhanismile, millest s\u00f5ltub kogu tuntud elu?<\/p>\n<\/div>\n<\/div>\n

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Ribosoomi v\u00f5ib v\u00f5rrelda tehasega, mis loeb geneetilist juhendit ja toodab selle alusel valke. Igas elusrakus on tuhandeid ribosoome ning ilma nendeta ei suudaks \u00fckski organism ellu j\u00e4\u00e4da. Ometi on see s\u00fcsteem nii keerukas, et selle tekkimine n\u00e4ib esmapilgul peaaegu v\u00f5imatu. Ribosoomi teke aga v\u00f5ibki j\u00e4\u00e4da m\u00f5istatuseks aga siinkohal on pakkuda m\u00f5nesid oletusi.<\/p>\n

Teadusajakirjas \u00abPNAS Nexus\u00bb avaldatud \u00fclevaateartiklis m\u00e4rgivad Michael Lynch ja Andrew Ellington, et ribosoom, mis loob k\u00f5ik rakuvalgud, koosneb ka ise mitmetest valkudest. Autorid p\u00fcstitavad k\u00fcsimuse, kuidas ribosoom sellisel juhul esmalt tekkis.<\/p>\n<\/div>\n<\/div>\n

Loe allikat<\/a><\/p>\n

Loe allikat<\/a><\/p>\n

<\/div>\n","protected":false},"excerpt":{"rendered":"
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