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Volume 10, Issue 4, Pages 361-368 (April 2003) Crystal Structure and Molecular Modeling of 17-DMAG in Complex with Human Hsp90 Joseph M. Jez, Julian C.-H. Chen, Giulio Rastelli, Robert M. Stroud, Daniel V. Santi Chemistry & Biology Volume 10, Issue 4, Pages 361-368 (April 2003) DOI: 10.1016/S1074-5521(03)00075-9

Figure 1 Geldanamycin and Analogs (A) Structures of geldanamycin (R = CH3O-) and 17-substituted analogs (17-AAG, R = CH2=CHCH2NH- and 17-DMAG, R = (CH3)2NCH2CH2NH-). (B) Conformations of geldanamycin in the free (left) and the Hsp90-bound (right) forms. Chemistry & Biology 2003 10, 361-368DOI: (10.1016/S1074-5521(03)00075-9)

Figure 2 Structure of the Hsp90•17-DMAG Complex Ribbon representation of the N-terminal domain of human Hsp90α (α helices, gold; β strands, blue) showing the location of 17-DMAG (green ball-and-stick model). The N and C termini residues are indicated. Chemistry & Biology 2003 10, 361-368DOI: (10.1016/S1074-5521(03)00075-9)

Figure 3 Binding of 17-DMAG (A) Stereoview of the composite omit, crossvalidated, sigma-A weighted map electron density (contoured at 1.2 σ) of 17-DMAG. (B) Stereoview of residues in the binding cleft. 17-DMAG (green) and waters (red spheres) are also shown. Hydrogen bond interactions are indicated by dotted lines (rose). Chemistry & Biology 2003 10, 361-368DOI: (10.1016/S1074-5521(03)00075-9)

Figure 4 Interactions between 17-DMAG and Hsp90 Schematic drawing of interactions between 17-DMAG and the ATP binding site of human Hsp90α. Hydrogen bonds are shown as dotted lines with distances given in angstroms. Chemistry & Biology 2003 10, 361-368DOI: (10.1016/S1074-5521(03)00075-9)

Figure 5 Molecular Dynamics of the Conformational Change of Geldanamycin Superimposition of averaged structures collected during the 800 ps TMD simulation that converts the free into the bound form of geldanamycin. In the superimpositions, the initial structures are colored in yellow, and the final structures are colored in cyan. The intermediate conformations are explicitly shown. For clarity, only the polar hydrogens are shown. Chemistry & Biology 2003 10, 361-368DOI: (10.1016/S1074-5521(03)00075-9)