Fig. 1
From: Structural basis for species-selective targeting of Hsp90 in a pathogenic fungus
Structure of C. albicans Hsp90 nucleotide-binding domain (NBD) in apo and ligand-bound states. a Ribbon representation of crystal structures determined for C. albicans Hsp90 NBD in the non-ligand-bound or apo state (green), ADP-bound state (yellow) and in complex with radicicol (magenta). The ligands ADP and radicicol are represented as sticks and color-coded according to their heteroatom composition. An overlay of all three structures is also presented at the far right. b Ribbon representation of crystal structures determined for C. albicans NBD (darker shades) in the non-ligand-bound or apo state (top panel, green), ADP-bound state (middle panel, orange), and in complex with radicicol (lower panel, magenta). Structures for human Hsp90 NBD (lighter shades) are overlaid. The ligands ADP and radicicol are represented as sticks and color-coded according to their heteroatom composition. The main-chain atom r.m.s.d. for the superpositions is indicated in parentheses for each overlaid pair. c Detailed view of superpositions encompassing the region of the ligand-binding site. The top panel provides a detailed view of the region Asn94–Lys 101 in C. albicans and human apo structures, two human conformations are shown open (lighter green; PDB id. 1YES) and closed (darker green; PDB id. 1YER). The middle and bottom panels depict a detailed view of the residues which hydrogen-bond with ADP and radicicol, respectively, in both C. albicans and human Hsp90 NBD
