Fig. 9.

The structure of VEGFR-2 (3VHE) and binding site: Fig. 9a shows the 3D structure of crystal structure of human VEGFR-2 (PDBID: 3VHE). The solid ribbon is the 3D structure of crystal structure of 3VHE with a 1.55 Å resolution. In the center of 3VHE is a kinase domain inhibitor bound in the interface. Figure 9b shows ten poses of tanshinone IIA docked into the endogenous ligand’s (yellow) active site of 3VHE. Figure 9c shows the binding model of tanshinone IIA in 3VHE: at least three residues involved in the interactions, Cys919 (H-bond), Leu840, and Val848 (aromatic interactions)