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. Author manuscript; available in PMC: 2013 May 1.
Published in final edited form as: Wiley Interdiscip Rev RNA. 2011 Sep 28;3(3):369–384. doi: 10.1002/wrna.114

Figure 5.

Figure 5

Cartoon, ball-and-stick, and secondary structure diagrams of the adenine and guanine riboswitches. (a) Cartoon diagram showing the tertiary structure of the B. subtilis xpt guanine binding riboswitch. The coordinates are from PDB entry 1Y27. (b) Cartoon diagram showing the tertiary structure of the V. vulnificus add adenine riboswitch. The coordinates are from PDB entry 1Y26. (c) Ball-and-stick diagram of the structure in (a) depicting interactions between guanine and the riboswitch. (d) Ball-and-stick diagram of the structure in (b) depicting interactions between adenine and the riboswitch. (e) Secondary structure diagram of the pbuE adenine riboswitch in the bound state. Nucleotides that were mutated to disrupt loop-loop interactions are highlighted in green as described in the text and ref.64.