A small molecule that preferentially binds the closed conformation of Hsp90
作者:Leslie D. Alexander、James R. Partridge、David A. Agard、Shelli R. McAlpine
DOI:10.1016/j.bmcl.2011.09.096
日期:2011.12
Described is the synthesis of three different fluorescein-tagged derivatives of a macrocycle, and their binding affinity to heat shock protein 90 (Hsp90). Using fluorescence polarization anisotropy, we report the binding affinity of these fluorescein-labeled compounds to Hsp90 in its open state and ATP-dependent closed state. We show that the compounds demonstrate a conformation-dependent preference for binding to the closed state. Published by Elsevier Ltd.
Synthesis and evaluation of biotinylated sansalvamide A analogs and their modulation of Hsp90
作者:Joseph B. Kunicki、Mark N. Petersen、Leslie D. Alexander、Veronica C. Ardi、Jeanette R. McConnell、Shelli R. McAlpine
DOI:10.1016/j.bmcl.2011.06.083
日期:2011.8
Described are the syntheses of three sansalvamide A derivatives that contain biotinylated tags at individual positions around the macrocycle. The tagged derivatives indicated in protein pull-down assays that they bind to Hsp90 at the same binding site (N-Middle domain) as the San A-amide peptide. Further, these compounds inhibit binding between Hsp90 and multiple C-terminal client proteins. This interaction is unique to the San A analogs indicating they can be tuned for selectivity against Hsp90 client/ co-chaperone proteins. (C) 2011 Elsevier Ltd. All rights reserved.