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RNA???????

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Title: RNA Author: MBL Last modified by: MBL Created Date: 4/18/2000 8:07:12 AM Document presentation format: Company – PowerPoint PPT presentation

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Title: RNA???????


1
RNA???????
  • 2001??? ?
  • ? ??????
  • 2003?4?24?

2
RNA??
  • ??????RNA??????????????????,??mRNA??,?????????
    ???????,??RNA??(RNA interference,
    RNAi,???RNA??????)?

3
(No Transcript)
4
RNAi-????????
  • RNAi??????????????????????????????????????????????
    ???????
  • RNAi???????????????????????,??????????????,
    ??????????.????????????????????,???????????????,??
    ?SCIENCE??2002????????????
  • ?????????siRNA (21-23??????????RNA??(small
    interfering RNAs,siRNAs,??????RNAs)???????????????
    ,????????????????????????????????????????,????????
    ???????

5
????????
  • RNAi?????????20??,???????????????????Richjorge
    nsen???,?????(petunias)??????????????????????????
    ???????,???????,??????????,??????????????,????????
    ?????jorgensen???????????(cosuppression),?????????
    ??????????????????????????????,????????????,??????
    ???????? 

6
(No Transcript)
7
  • ????,???????????????????Santa?,?????X??????????
    ?????,??????????????????,??????????????,??????????
    ?,?????????????????,??????????????

8
Quelling??
  • ?????????????????????????Cogoni?,??????????????
    ?(Neurosporacrassa),??????????????????????????????
    ???????????????quelling?

9
????
  • ????????(transcriptional gene silencing ,or
    TGS)????????,??????????????????????????,?????????
    ???.
  • ??????????(post transcriptional gene silencing
    ,or PTGS)
  • ??Hamilton?,?????PTGS??????????????????25nt????RNA
    ,????PTGS?????????25nt?RNA
  • ??HamiltonAJetal.
  • ??Science,1999,286(5441)950?952

10
(No Transcript)
11
RNA???????
  • ????????RNAi
  • ????dsRNA?????????????????????(Caenorhabditis.el
    egans)????1995???????????Guo?Kemphues?????RNA
    (antisense RNA)???par1??????????????,????RNA??????
    ?????,??????,?????RNA(sense RNA)????,????????????
  • GuoS,KemphuesKJ.ParL.J.Cell, 1995,81611-620.

12
  • ?????????3??1998??????????????Andrew
    Fire????????????Craig Mello?????dsRNA??????????
    ?????,???????????????????????????????????????RNA??
    ??????,????????????,????????RNA???????????????????
    ?????????????????RNA??????????????????????????????
    ?RNA?????????????????,???????????????????????????R
    NA???
  • FireA,XuS,MontgomeryMK,etal
  • J.Nature,1998,391806811.

13
  • RNAi???????Fire?Timmons????,????????unc22
    ???????RNA???????????,?????????unc22??????
  • ?TimmonsL,FireA,1998?Nature,395854
  • ??????????????RNA????????????????????????RNAi??
    ????????????,???????????????????????TabaraH,Grisho
    kA,MelloCC?1998.Science,282430431

14
(No Transcript)
15
  • ??(Planarian)
  • Sanchez_AlvaradoA,NewmarkPA,1999.Proc Natl
    Acad Sci USA,965045054
  • ??(hydra) LohmannJU,EndlI,BoschTC,1999.Dev
    Biol,214211214
  • ??(trypanosomes)
  • NgoH,TschudiC,GullK,UlluE,1998.Proc Natl
    Acad Sci USA,951468714692?
  • ??(fungi)(neurospora crassa)
  • CogoniG,MacinoG,1999.Nature,339166169

16
  • ???(Drosophila)???RNAi
  • Berstein E et al Nature 2001,409(6818)363-366
  • ???????RNAi
  • Wassnengger M et al plant Mol Biol
    1998,37(2)349-362
  • ??????RNAi
  • Wianny F et al Nat cell Biol 2000 ,2 (2)70-75

17
????RNAi
  • ???????????RNAi????????dsRNA???????????????,??????
    ??????????dsRNA????????????????????DNA????????????
    ??
  • ??????Hannon??????????Bartel??????????????????,???
    dsRNA??????S2????????????,??????????????????dsRNA
    ???????21-23nt?dsR NA,????????????
    21-23nt?dsRNA????????????mR NA,????????????
  • ?HannondSMetal.Nature,2000,404(6775)293296
  • ????ZamorePDetal.Cell,2000,101(1)2533

18
???(Dicer)
  • ???,Hannon??????????????????dsRNA?RNase??????(Dice
    r)?
  • ?BersteinEetal.Nature,2001,409(6818)363366 ?

19
RNAi???????????
  • ? ??,Tuschl??????????????????RNAi?????????????siRN
    A(???3'??2nt?21nt)?????????????????????????,??Hela
    ??????293???,????????,??????RNAi?siRNA????????????
    ,??mRNA???????????????????????????gt30bp?dsRNA????
    ???????,?????????gt30bp?dsRNA????????????????,????
    ???,???????PKR,???PKR????????????????eIF2a??,?????
    ??????????,?dsRNAs??RNaseL,?????RNA???
  • TuschlT,ZamorePD,LehmannR,etal
  • J.GenesDev,1999,1331913197

20
  • 2002?5?,?????Lindenbach???,??21??????DNA????RNA,?
    ?????????????,24h?,????????????90??,????RNA??????
    ??????????7?,Novina??RNAi?????HIV 1??????
  • 2002?7?4?,?????????????McCaffrey????????RNA?????
    ???DNA?????????RNA????????,????C???????????????,??
    ??RNA??????RNA??????????????81?92
    8,???????RNA??????????????????C?????????????????R
    NAi?????????????????

21
(No Transcript)
22
  • 21ntsiRNA???????????????????????????????????,??
    ???6??????????????????????????,????????????10?????
    ?,??????????????,RNAi?????????????,???????????????
    ???

23
  • ???????????????????????????PTGS?RNAi???????,?
    ????????,?dsRNA?????????dsRNA?????????????????????
    ?????,????????????,???dsRNA?????????????,??????F1?
    ???????????,??????????dsRNA?????????????RNAi,????
    ????dsRNA????????dsRNA?????????RNAi,???????????500
    bp??????????????,??????????????????,RNAi?????????,
    ??????????????????mRNA?????? ?

24
(No Transcript)
25
  • ? ?!
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