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Exploring RNA structures: from conformation angles to ribozymes

Delve into the intricate world of RNA structures, from ribose ring conformations to the interplay between secondary and tertiary structures. Understand the significance of unusual bases and hydrogen bonds in different tRNA classes. Explore crystal versus solution conformations and the role of stacking in RNA. Discover the fascinating mechanisms of ribozymes and the systematization of unique RNA features.

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Exploring RNA structures: from conformation angles to ribozymes

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  1. RNA Structures September 19, 21 2006

  2. Ribose ring

  3. A form conformation

  4. RNA conformation angles

  5. UpA

  6. UpA

  7. UpA

  8. UpA

  9. GpC

  10. RNA oligonucleotide A form

  11. Crystal vs solution conformation • Internal loopin xtal • Full loop in solution

  12. Schematic of internal loop

  13. Water involved in mispair

  14. tRNA

  15. L shaped

  16. H bonds between distant regions

  17. Many unusual bases

  18. Even more unusual bases

  19. Relationship between secondary and tertiary structure

  20. Conserved and semi conserved bases

  21. Different classes of tRNA

  22. Different types of hydrogen bonds between conserved bases

  23. Stacking is a key feature

  24. Ribozymes • RNA with catalytic activity

  25. Stacking

  26. Tertiary hydrogen bonds

  27. P4-P6

  28. Systematize unusual features: RNA ontology

  29. References “The Crystal Structure of an All-RNA Hammerhead Ribozyme: A Proposed Mechanism for RNA Catalytic Cleavage.” Cell, Vol. 81, June 30, 1995, pp. 992-993, 995. “Crystal Structure of an RNA double helix incorporating a track of non-Watson-Crick base pairs”, Nature, Vol. 353, October 10, 1991, pp. 579, 581. Leontis and Westhof. RNA, Vol. 7, 2001, pp. 499-512 Neidle, Stephen. Nucleic Acid Structure and Recognition. Oxford University Press, 2002, pp. 140-142, 148. Neidle, Stephen, ed. Oxford Handbook of Nucleic Acid Structures. Oxford University Press, 1999, p. 610. Saenger, Wolfram. Principles of Nucleic Acid Structure. Springer-Verlag New York Inc., 1984, pp. 251, 332-333, 335.

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