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Sintetichna genomika ce galuz sintetichnoyi biologiyi yaka vikoristovuye aspekti genetichnoyi modifikaciyi vzhe isnuyuchih form zhittya abo shtuchnij sintez geniv dlya stvorennya novoyi DNK abo cilih form zhittya Zbirka polimeraznogo ciklu Sintetichna genomika mozhe vidigrati vazhlivu rol u likuvanni genetichnih zahvoryuvan lyudini nadayuchi instrumenti dlya tochnogo redaguvannya genomu ta gennoyi terapiyi 1 Sintetichna genomika zokrema vikoristovuye skonstrujovani genni shemi dlya programuvannya zhivih klitin pidvishuyuchi tochnist i efektivnist biotehnologichnih zastosuvan takih yak genoterapiya cilova dostavka likiv metabolichna i mikrobiomna inzheneriya a takozh sintez biomaterialu Mehanistichne modelyuvannya ta metodi mashinnogo navchannya vikoristovuyutsya v poyednanni z sintetichnoyu genomikoyu pereviryayuchi priznacheni funkciyi ta pokrashuyuchi shvidkist i tochnist prognoziv 2 Zmist 1 Oglyad 2 Istoriya 3 Likuvannya genetichnih hvorob 4 Tehnologiya rekombinantnoyi DNK 4 1 Zbirka polimeraznogo ciklu 4 2 Metod skladannya Gibsona 4 3 Transformaciya asocijovana rekombinaciya 5 Neprirodna para osnov UBP 6 Komp yuterni modeli 7 Divis takozh 8 Dodatkova literatura 9 Posilannya 10 PrimitkiOglyad RedaguvatiSintetichna genomika vidriznyayetsya vid genetichnoyi inzheneriyi v tomu sensi sho vona ne vikoristovuye prirodni geni u stvorenni form zhittya Sintetichna genomika mozhe vikoristovuvati specialno rozrobleni seriyi par osnov hocha v bilsh rozshirenomu ta narazi nerealizovanomu sensi sintetichna genomika mozhe vikoristovuvati genetichni kodi yaki ne skladayutsya z dvoh par osnov DNK yaki zaraz vikoristovuyutsya zhittyam Zdatnist konstruyuvati dovgi lancyugi par osnov deshevo i tochno u velikih masshtabah dozvolila doslidnikam provoditi eksperimenti z genomami yakih ne isnuye v prirodi U poyednanni z rozvitkom modelej zgortannya bilka ta zmenshennyam obchislyuvalnih vitrat sintetichna genomika pochinaye vstupati v produktivnu stadiyu isnuvannya Istoriya RedaguvatiU 2010 roci doslidnikam vpershe vdalosya stvoriti sintetichnij organizm 3 Cej proriv buv zdijsnenij kompaniyeyu Synthetic Genomics Inc yaka prodovzhuye specializuvatisya na doslidzhenni ta komercializaciyi specialno rozroblenih genomiv 4 Ce bulo dosyagnuto shlyahom sintezu genomu rozmirom 600 kbit shozhogo na genom Mycoplasma genitalium za vinyatkom vstavki kilkoh vodyanih znakiv za dopomogoyu metodu zbirki Gibsona ta rekombinaciyi pov yazanoyi z transformaciyeyu 5 Likuvannya genetichnih hvorob RedaguvatiSintetichna genomika mozhe vidigrati vazhlivu rol u likuvanni genetichnih zahvoryuvan lyudini nadayuchi instrumenti dlya tochnogo redaguvannya genomu ta genoterapiyi Odnim iz osnovnih zastosuvan sintetichnoyi genomiki ye rozrobka gennoyi terapiyi yaka peredbachaye vvedennya zdorovih kopij geniv u klitini dlya zamini abo dopovnennya nespravnih geniv Metodi sintetichnoyi genomiki mozhna vikoristovuvati dlya rozrobki ta sintezu individualnih poslidovnostej DNK yaki mozhna vikoristovuvati yak vektori dlya dostavki terapevtichnih geniv u klitini Krim togo sintetichnu genomiku takozh mozhna vikoristovuvati dlya tochnogo redaguvannya genoma klitin shlyahom dodavannya vidalennya abo modifikaciyi pevnih geniv Cej pidhid mozhna vikoristovuvati dlya vipravlennya genetichnih mutacij yaki viklikayut zahvoryuvannya abo dlya stvorennya klitin z novimi chi pokrashenimi funkciyami Odnim iz perspektivnih zastosuvan sintetichnoyi genomiki v gennij terapiyi ye vikoristannya tehnologiyi redaguvannya geniv CRISPR Cas9 yaka dozvolyaye vnositi visokotochni ta cilespryamovani modifikaciyi genomu CRISPR Cas9 vzhe uspishno vikoristovuvavsya dlya likuvannya genetichnih zahvoryuvan u tvarin i trivayut klinichni viprobuvannya yaki pereviryayut jogo bezpeku ta efektivnist na lyudyah Zagalom sintetichna genomika maye veliki perspektivi dlya rozrobki novih ta efektivnih metodiv likuvannya shirokogo spektru genetichnih zahvoryuvan hocha neobhidni dodatkovi doslidzhennya ta rozrobki persh nizh ci metodi mozhna bude regulyarno vikoristovuvati v klinichnih umovah Tehnologiya rekombinantnoyi DNK RedaguvatiNezabarom pislya vidkrittya restrikcijnih endonukleaz i ligaz galuz genetiki pochala vikoristovuvati ci molekulyarni instrumenti dlya zbirannya shtuchnih poslidovnostej iz menshih fragmentiv sintetichnoyi abo prirodnoyi DNK Perevaga u vikoristanni rekombinatornogo pidhodu na vidminu vid bezperervnogo sintezu DNK viplivaye iz zvorotnogo zv yazku yakij isnuye mizh dovzhinoyu sintetichnoyi DNK ta vidsotkom chistoti ciyeyi sintetichnoyi dovzhini Inshimi slovami u miru togo yak sintezuyutsya dovshi poslidovnosti kilkist kloniv sho mistyat pomilki zrostaye cherez pritamannu chastotu pomilok potochnih tehnologij 6 Hocha tehnologiya rekombinantnoyi DNK chastishe vikoristovuyetsya dlya konstruyuvannya zlitih bilkiv i plazmid vzhe z yavilosya kilka metodiv z bilshoyu potuzhnistyu sho dozvolyaye konstruyuvati cili genomi 7 Zbirka polimeraznogo ciklu Redaguvati nbsp Zbirka polimeraznogo ciklu Sini strilki predstavlyayut oligonukleotidi rozmirom vid 40 do 60 p n z oblastyami sho perekrivayutsya priblizno 20 p n Cikl povtoryuyetsya poki ne bude skonstrujovanij ostatochnij genom Polimerazna ciklichna zbirka PCA vikoristovuye seriyu oligonukleotidiv dovzhinoyu priblizno 40 60 nukleotidiv yaki razom skladayut obidva lancyugi DNK sho sintezuyetsya Ci oligonukleotidi rozrobleni takim chinom sho odin oligonukleotid z odnogo lancyuga mistit dovzhinu priblizno 20 nukleotidiv na kozhnomu kinci sho ye komplementarnim do poslidovnostej dvoh riznih oligonukleotidiv na protilezhnomu lancyuzi takim chinom stvoryuyuchi dilyanki perekrittya Ves nabir obroblyayetsya za dopomogoyu cikliv a gibridizaciya pri 60 C b podovzhennya za dopomogoyu polimerazi Taq i standartnoyi ligazi i c denaturaciya pri 95 C utvoryuyuchi vse dovshi bezperervni lancyugi sho zreshtoyu prizvodit do ostatochnogo sintezovanogo genomu 8 PCA buv vikoristanij dlya stvorennya pershogo v istoriyi sintetichnogo genomu virusu Phi X 174 9 Metod skladannya Gibsona Redaguvati nbsp Metod skladannya Gibsona Sini strilki predstavlyayut kaseti DNK yaki mozhut buti bud yakogo rozmiru napriklad 6 kb kozhna Pomaranchevi segmenti predstavlyayut dilyanki identichnih poslidovnostej DNK Cej proces mozhna zdijsniti z kilkoma pochatkovimi kasetami Metod zbirki Gibsona rozroblenij Denielom Gibsonom pid chas jogo roboti v Instituti Dzh Krejga Ventera potrebuye naboru dvolancyugovih kaset DNK yaki skladayut ves genom sho sintezuyetsya Kaseti vidriznyayutsya vid kontigiv za viznachennyam tim sho ci poslidovnosti mistyat dilyanki gomologiyi z inshimi kasetami dlya cilej rekombinaciyi Na vidminu vid Zbirki polimeraznogo ciklu Metod zbirki Gibsona ye odnoetapnoyu izotermichnoyu reakciyeyu z bilshoyu yemnistyu poslidovnosti otzhe vin vikoristovuyetsya zamist zbirki polimeraznogo ciklu dlya genomiv rozmirom ponad 6 kb Ekzonukleaza T5 vikonuye reakciyu zvorotnogo zhuvannya na kincevih segmentah pracyuyuchi v napryamku vid 5 do 3 takim chinom stvoryuyuchi komplementarni vistupi Vistupi gibridizuyutsya odin z odnim DNK polimeraza Phusion zapovnyuye vsi vidsutni nukleotidi a viyimki zapechatuyutsya ligazoyu Odnak kilkist genomiv yaki mozhna sintezuvati lishe za dopomogoyu cogo metodu obmezhena oskilki koli kaseti DNK zbilshuyutsya v dovzhinu voni vimagayut rozmnozhennya in vitro dlya prodovzhennya gibridizaciyi vidpovidno zbirannya Gibsona chasto vikoristovuyetsya v poyednanni z rekombinaciyeyu pov yazanoyu z peretvorennyam div nizhche shob sintezuvati genomi rozmirom u kilka soten kilobaz 10 Transformaciya asocijovana rekombinaciya Redaguvati nbsp Klonuvannya usunennya rozriviv Sini strilki predstavlyayut kontigi DNK Segmenti odnogo koloru predstavlyayut komplementarni abo identichni poslidovnosti Specializovani prajmeri z podovzhennyami vikoristovuyutsya v polimeraznij lancyugovij reakciyi dlya stvorennya dilyanok gomologiyi na kincevih kincyah kontigiv DNK Metoyu tehnologiyi transformaciya asocijovannoyi rekombinaciyi TAR u sintetichnij genomici ye ob yednannya kontigiv DNK za dopomogoyu gomologichnoyi rekombinaciyi sho vikonuyetsya drizhdzhovoyu shtuchnoyu hromosomoyu YAC Vazhlivim ye element CEN u vektori YAC yakij vidpovidaye centromeri drizhdzhiv Cya poslidovnist nadaye vektoru zdatnist povoditisya hromosomnim chinom takim chinom dozvolyayuchi jomu vikonuvati gomologichnu rekombinaciyu 11 nbsp Rekombinaciya pov yazana z peretvorennyam Perehresni podiyi vidbuvayutsya mizh dilyankami gomologiyi v kasetah i vektori YAC takim chinom z yednuyuchi menshi poslidovnosti DNK v odin bilshij kontig Spochatku vikonuyetsya klonuvannya reparaciyi rozrivu dlya stvorennya dilyanok gomologiyi flankuyuchih kontigi DNK Klonuvannya z vidnovlennyam rozriviv ce osobliva forma polimeraznoyi lancyugovoyi reakciyi u yakij vikoristovuyutsya specializovani prajmeri z rozshirennyami sho vihodyat za mezhi poslidovnosti DNK misheni 12 Potim kaseti DNK piddayutsya vplivu vektora YAC yakij keruye procesom gomologichnoyi rekombinaciyi takim chinom z yednuyuchi kaseti DNK Tehnologiya Polymerase Cycling Assembly ta tehnologiya TAR buli vikoristani razom dlya pobudovi genoma Mycoplasma genitalium rozmirom 600 kb u 2008 roci pershogo v istoriyi sintetichnogo organizmu 13 Podibni kroki buli zrobleni dlya sintezu bilshogo genoma Mycoplasma mycoides cherez kilka rokiv 14 Neprirodna para osnov UBP RedaguvatiNeprirodna para osnov UBP ce rozroblena subodinicya abo nukleoosnova DNK yaka stvoryuyetsya v laboratoriyi ta ne zustrichayetsya v prirodi U 2012 roci grupa amerikanskih vchenih pid kerivnictvom Flojda E Romesberga biologa himika z Naukovo doslidnogo institutu Skrippsa v San Diyego Kaliforniya opublikuvala sho jogo komanda rozrobila neprirodnu paru osnov UBP 15 Dva novih shtuchnih nukleotidi abo neprirodna para osnov UBP buli nazvani d5SICS i dNaM Ci shtuchni nukleotidi sho nesut gidrofobni nukleoosnovi mistyat dva zlitih aromatichnih kilcya yaki utvoryuyut kompleks d5SICS dNaM abo paru osnov u DNK 16 17 U 2014 roci ta sama komanda z Naukovo doslidnogo institutu Skrippsa povidomila sho voni sintezuvali dilyanku kilcevoyi DNK plazmidi sho mistit prirodni pari osnov T A i C G razom iz najefektivnishoyu laboratoriyeyu UBP Romesberga i vstavili yiyi v klitini zvichajnoyi bakteriyi E coli yaka uspishno replikuvala neprirodni pari osnov u kilkoh pokolinnyah 18 Ce pershij vidomij priklad zhivogo organizmu yakij peredaye rozshirenij genetichnij kod nastupnim pokolinnyam 16 19 Ce bulo chastkovo dosyagnuto shlyahom dodavannya pidtrimuyuchogo gena vodorostej yakij ekspresuye transporter nukleotidnogo trifosfatu yakij efektivno importuye trifosfati yak d5SICSTP tak i dNaMTP u bakteriyi E coli 16 Potim prirodni bakterialni shlyahi replikaciyi vikoristovuyut yih dlya tochnoyi replikaciyi plazmidi sho mistit d5SICS dNaM Uspishne vklyuchennya tretoyi pari osnov ye znachnim prorivom u dosyagnenni meti znachnogo rozshirennya kilkosti aminokislot yaki mozhut buti zakodovani DNK vid isnuyuchih 20 aminokislot do teoretichno mozhlivih 172 takim chinom rozshiryuyuchi potencial zhivih organizmiv do viroblyati novi bilki 18 Shtuchni lancyuzhki DNK she nichogo ne koduyut ale vcheni pripuskayut sho voni mozhut buti rozrobleni dlya virobnictva novih bilkiv yaki mozhut mati promislove chi farmacevtichne vikoristannya 20 Komp yuterni modeli RedaguvatiU kvitni 2019 roku vcheni z ETH Zurich povidomili pro stvorennya pershogo v sviti genoma bakteriyi pid nazvoyu Caulobacter ethensis 2 0 stvorenogo povnistyu za dopomogoyu komp yutera hocha sporidnenoyi zhittyezdatnoyi formi C ethensis 2 0 she ne isnuye 21 22 Divis takozh RedaguvatiBioinzheneriya Genoterapiya Redaguvannya genoma Genetichna inzheneriya Sintetichna biologiya Obchislyuvalna biologiyaDodatkova literatura RedaguvatiVoigt Christopher A 11 grudnya 2020 Synthetic biology 2020 2030 six commercially available products that are changing our world Nature Communications angl 11 1 doi 10 1038 s41467 020 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