Homology modeling of the VASt domain 3D structure. (A) Ribbon diagram representation of the predicted 3D structure of AtVAD1 VASt domain, colored from blue (N-terminus) to red (C-terminus). Secondary structure elements are numbered from N to C terminus. (B) The VASt domain harbors a large hydrophobic cavity. Surface of AtVAD1 VASt model colored according to residue hydrophobicity. Capping surface is shown in black, the entrance of the hydrophobic cavity is marked by an arrow.