The RNA World GK-12 Presenation

1. The RNA WorldGK-12 Presenation R.S. Michael Abdelsayed C.T. Mrs. Rojas NSF GK-12 NSF Grant DGE-0638751

2. Activities and Objectives Transcription – Students will make DNA into RNA Students should be able to understand that DNA is made into RNA Splicing – The RNA they make will splice itself Students should be able to understand that RNA is spliced to make a protein Ribozyme activity – Splicing will occur due to ribozyme! Students should be able to understand that in addition to proteins, RNA is an enzyme

3. California State Standards

4. Materials

5. Lab Prep

6. Question/Answers

7. Suggestions • 2 Day Lab – Lecture first day (maybe demo gel), run lab second day • Do lab after they have learned to make an agarose gel, or teach them during the lab (down time) • Can tie lab in with enzymes or central dogma (transcription)

8. Central dogma • DNA is made (transcribed) into RNA • RNA is made (translated) into protein

9. DNA is made into RNA • A protein enzyme, polymerase, transcribes (makes) DNA into RNA. You will transcribe DNA into RNA today!

10. RNA made into protein RNA is genetic material that codes for protein RNA must contain the correct code to make the correct protein

11. RNA Viruses!

12. RNA silencing RNA can turns genes off Normal plant Color blocked by RNA Color blocked by RNA

13. RNA Structure Non-linear RNA Linear mRNA tRNA

14. Create Your Own RNA http://bcove.me/gyj1e5dn

15. Ribozyme • RNA that is an enzyme • Enzymes speed up a reaction • Ribozymes cleave (cut) RNA RNA Ribozyme

16. Splicing Splice – to join together at the ends Genes can be cut and pasted together (spliced!)

17. RNA Can Splice Itself Nobel Prize RNA Ribozyme Thomas Cech

18. Splicing Before splicing Exon 1 Intron Exon 2 After splicing Exon 1 Exon 2 Exon –codes for protein Intron – does not code for protein, splice it out!

19. Why Splice? Before splicing Not ready to be made into protein After splicing Ready to be made into protein Imagine someone gave you their phone number with ten extra numbers in the middle!

20. You will make RNA! The RNA YOU make will splice itself The RNA you make will cut itself and put itself together RNA Ribozyme

21. Procedure DNA Polymerase RNA Ribozyme = + Add 1uL Polymerase transcription enzyme 9uL DNA Transcribe (make RNA) Incubate at 37 degrees

22. Where does the ribozyme come from? Its will come from the RNA you make. The ribozyme is in the intron and cuts itself out! RNA Ribozyme

23. Results

24. What it will look like RNA DNA 1 2 3 4 5 6

25. Possible Adjustments Present as a ribozyme (enzyme) lab only (no transcription or splicing mentioned) “Today we will cut RNA” Protocol remains the same Incubate RNA, then observe on gel that RNA cuts itself

26. Enzyme

27. RNA is an enzyme, Ribozyme • RNA that is an enzyme • Enzymes speed up a reaction • Ribozymes cleave (cut) RNA RNA Ribozyme

28. Enzymes – Temperature, ions, pH • All enzymes have a temperature and a pH at which they work the fastest. • Ions can change how well an enzyme works • Enzymes in human cells work best at 37oC (or 98.6oF). • Maybe why our bodies are always 98.6??

29. Procedure DNA Polymerase RNA Ribozyme = + Add 1uL Polymerase transcription enzyme 9uL DNA Transcribe (make RNA) Incubate at 37 degrees

30. Procedure RNA Ribozyme Can change temperature (37°C works best) Can add MgCl2 (May work faster) Incubate at 37 degrees Optimal Temperature

31. Results Not cut RNA Cut RNA

32. Thanks • GK-12 • Mrs. Rojas • Dr. Luptak GK-12 Directors • Dr. Mota-Bravo • Dr. de la Cruz • Dr. Mulligan NSF GK-12 NSF Grant DGE-0638751