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An RNA Reset Button
                          Bumgarner and colleagues
                                   Molecular Cell
                                              2012


                                      Presented by
                                   Nacho Caballero


Friday, September 7, 12
Friday, September 7, 12
Flo11 is a yeast cell surface glycoprotein
               required to form invasive filaments




                                            Flo11




Friday, September 7, 12
Flo11 is a yeast cell surface glycoprotein
               required to form invasive filaments




                                                Flo11

                      Flo11 shows variegated expression




Friday, September 7, 12
FLO11




Friday, September 7, 12
Long non-coding RNAs regulate
                   the variegated transcription of Flo11




        ICR1                                 FLO11


      PWR1




Friday, September 7, 12
Long non-coding RNAs regulate
                   the variegated transcription of Flo11

                                               Flo11



        ICR1                                 FLO11


      PWR1




Friday, September 7, 12
Long non-coding RNAs regulate
                   the variegated transcription of Flo11

                                               Flo11



        ICR1                                 FLO11


      PWR1




Friday, September 7, 12
Long non-coding RNAs regulate
                   the variegated transcription of Flo11

                                               Flo11



        ICR1                                 FLO11


      PWR1


                          But who regulates them?
Friday, September 7, 12
ICR1              FLO11


      PWR1




Friday, September 7, 12
ICR1                          FLO11
                          Rpd3L
                          Remodeler

      PWR1




Friday, September 7, 12
Transcription factor Flo8
                          activates Flo11 expression




        ICR1                                  FLO11
                          Flo8   Rpd3L
                                 Remodeler

      PWR1


     Sfl1


Friday, September 7, 12
Transcription factor Flo8
                          activates Flo11 expression




        ICR1                                  FLO11
                          Flo8   Rpd3L
                                 Remodeler

      PWR1


     Sfl1


Friday, September 7, 12
Transcription factor Flo8
                          activates Flo11 expression

                                                Flo11



        ICR1                                  FLO11
                          Flo8   Rpd3L
                                 Remodeler

      PWR1


     Sfl1


Friday, September 7, 12
ICR1              FLO11


      PWR1




Friday, September 7, 12
Transcription factor Sfl1
                           silences Flo11 expression




        ICR1                                   FLO11
                          Sfl1

      PWR1




Friday, September 7, 12
Transcription factor Sfl1
                           silences Flo11 expression




        ICR1                                   FLO11
                          Sfl1

      PWR1


     Flo8


Friday, September 7, 12
Transcription factor Sfl1
                           silences Flo11 expression




        ICR1                                   FLO11
                          Sfl1    Hda1
                                 Remodeler

      PWR1


     Flo8


Friday, September 7, 12
Transcription factor Sfl1
                           silences Flo11 expression

                                                Flo11



        ICR1                                   FLO11
                          Sfl1    Hda1
                                 Remodeler

      PWR1


     Flo8


Friday, September 7, 12
ICR1              FLO11


      PWR1




Friday, September 7, 12
Infrequent transcription of ICR1
                                 resets the system




        ICR1                                     FLO11


      PWR1


                          Flo8     Sfl1

Friday, September 7, 12
Infrequent transcription of ICR1
                                 resets the system




        ICR1                                     FLO11


      PWR1


         NowFlo8 and Sfl1 can compete for binding
             Flo8     Sfl1

Friday, September 7, 12
FLO11
                          ON


                          PWR1                ICR1




                               Flo8           Sfl1




Friday, September 7, 12
FLO11          OFF



                          PWR1            ICR1




                           Flo8           Sfl1




Friday, September 7, 12
FLO11



                          PWR1            ICR1

                                    RESET


                           Flo8             Sfl1




Friday, September 7, 12
Friday, September 7, 12
Rpd3L     Chromatin remodeling         Hda1
             Remodeler                              Remodeler
                       makes each state heritable




Friday, September 7, 12
Rpd3L     Chromatin remodeling         Hda1
             Remodeler                              Remodeler
                       makes each state heritable


                                   The act of transcription
           ICR1                     is functional, not the
                                          transcript




Friday, September 7, 12
Rpd3L     Chromatin remodeling         Hda1
             Remodeler                              Remodeler
                       makes each state heritable


                                   The act of transcription
           ICR1                     is functional, not the
                                          transcript

        Most information in the
         non-coding genome
           remains hidden

Friday, September 7, 12

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An RNA reset button

  • 1. An RNA Reset Button Bumgarner and colleagues Molecular Cell 2012 Presented by Nacho Caballero Friday, September 7, 12
  • 3. Flo11 is a yeast cell surface glycoprotein required to form invasive filaments Flo11 Friday, September 7, 12
  • 4. Flo11 is a yeast cell surface glycoprotein required to form invasive filaments Flo11 Flo11 shows variegated expression Friday, September 7, 12
  • 6. Long non-coding RNAs regulate the variegated transcription of Flo11 ICR1 FLO11 PWR1 Friday, September 7, 12
  • 7. Long non-coding RNAs regulate the variegated transcription of Flo11 Flo11 ICR1 FLO11 PWR1 Friday, September 7, 12
  • 8. Long non-coding RNAs regulate the variegated transcription of Flo11 Flo11 ICR1 FLO11 PWR1 Friday, September 7, 12
  • 9. Long non-coding RNAs regulate the variegated transcription of Flo11 Flo11 ICR1 FLO11 PWR1 But who regulates them? Friday, September 7, 12
  • 10. ICR1 FLO11 PWR1 Friday, September 7, 12
  • 11. ICR1 FLO11 Rpd3L Remodeler PWR1 Friday, September 7, 12
  • 12. Transcription factor Flo8 activates Flo11 expression ICR1 FLO11 Flo8 Rpd3L Remodeler PWR1 Sfl1 Friday, September 7, 12
  • 13. Transcription factor Flo8 activates Flo11 expression ICR1 FLO11 Flo8 Rpd3L Remodeler PWR1 Sfl1 Friday, September 7, 12
  • 14. Transcription factor Flo8 activates Flo11 expression Flo11 ICR1 FLO11 Flo8 Rpd3L Remodeler PWR1 Sfl1 Friday, September 7, 12
  • 15. ICR1 FLO11 PWR1 Friday, September 7, 12
  • 16. Transcription factor Sfl1 silences Flo11 expression ICR1 FLO11 Sfl1 PWR1 Friday, September 7, 12
  • 17. Transcription factor Sfl1 silences Flo11 expression ICR1 FLO11 Sfl1 PWR1 Flo8 Friday, September 7, 12
  • 18. Transcription factor Sfl1 silences Flo11 expression ICR1 FLO11 Sfl1 Hda1 Remodeler PWR1 Flo8 Friday, September 7, 12
  • 19. Transcription factor Sfl1 silences Flo11 expression Flo11 ICR1 FLO11 Sfl1 Hda1 Remodeler PWR1 Flo8 Friday, September 7, 12
  • 20. ICR1 FLO11 PWR1 Friday, September 7, 12
  • 21. Infrequent transcription of ICR1 resets the system ICR1 FLO11 PWR1 Flo8 Sfl1 Friday, September 7, 12
  • 22. Infrequent transcription of ICR1 resets the system ICR1 FLO11 PWR1 NowFlo8 and Sfl1 can compete for binding Flo8 Sfl1 Friday, September 7, 12
  • 23. FLO11 ON PWR1 ICR1 Flo8 Sfl1 Friday, September 7, 12
  • 24. FLO11 OFF PWR1 ICR1 Flo8 Sfl1 Friday, September 7, 12
  • 25. FLO11 PWR1 ICR1 RESET Flo8 Sfl1 Friday, September 7, 12
  • 27. Rpd3L Chromatin remodeling Hda1 Remodeler Remodeler makes each state heritable Friday, September 7, 12
  • 28. Rpd3L Chromatin remodeling Hda1 Remodeler Remodeler makes each state heritable The act of transcription ICR1 is functional, not the transcript Friday, September 7, 12
  • 29. Rpd3L Chromatin remodeling Hda1 Remodeler Remodeler makes each state heritable The act of transcription ICR1 is functional, not the transcript Most information in the non-coding genome remains hidden Friday, September 7, 12