Figure 4 - full size

 

Figure 4.
Figure 4. The active site of the RT(P) -tenofovir complex with tenofovir in two conformations. In one conformation (tenofovir I), tenofovir stacks with the penultimate primer residue but does not engage in Watson-Crick base-pairing with the template dTMP. The dashed lines for the two base pairs upstream of the 3' terminus are labeled 1 -3 and 1' -3' for the template and primer strands, respectively. In the second conformation (tenofovir II), the adenine of tenofovir is flipped out by ~180° relative to the position of adenine in the first conformation.

The above figure is reprinted by permission from Macmillan Publishers Ltd: Nat Struct Mol Biol (2004, 11, 469-474) copyright 2004.