Figure 5. Electrostatic based clustering of the seven bladed WD repeat β-propellers.

The different seven-bladed WD β-propeller sub-familes are clearly in separate clusters. Five (1GOT, 1SQ9, 1ERJ, 1K8K, 1P22) out of seven subfamilies appear to have good clustering in electrostatic space. The partial overlap of 1GXR and 1PGU families indicates that their electrostatic potentials are similar. Electrostatics are shown for the top surfaces of proteins.