Figure 5 - full size

 

Figure 5.
FIG. 5. Comparison of the 174 loop and 99 loop in AaV-SP-I (cyan) AaV-SP-II (yellow), and TSV-PA (silver-gray) shows the architectural features of substrate binding sites S2 S4 of the three proteins. The key residues (215, 178, 173, 174, 97, 98, 99) for substrate-binding are shown with stick model. The hydrogen bonds between Tyr215 and Glu173 of the two AaV-SPs and the hydrogen bond between Glu97 and Tyr178 of AaV-SP-I are shown. The amino acid residues of AaV-SPs and TSV-PA are displayed in black and blue. The schematic substrate-binding sites 2, 3, and 4 are indicated with a light green ellipse.

The above figure is reprinted by permission from the ASBMB: J Biol Chem (2005, 280, 10524-10529) copyright 2005.