FIGURE 3.
The γ-shaft triggers ATP binding and ADP release via specific interactions with two HTH domains (in red) of β. The residue γMet-23 is 100° (in angular position) ahead of the residues γArg-104 and γGlu-105. Therefore, we infer that γMet-23 triggers ADP release, and γArg-104 and γGlu-105 trigger ATP binding.