4IO8

Crystal structure of human HSP70 complexed with 4-{(2R,3S,4R)-5-[(R)-6-Amino-8-(3,4-dichloro-benzylamino)-purin-9-yl]-3,4-dihydroxy-tetrahydro-furan-2-ylmethoxymethyl}-benzonitrile


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.58 Å
  • R-Value Free: 0.222 
  • R-Value Work: 0.169 

wwPDB Validation 3D Report Full Report


This is version 1.0 of the entry. See complete history

Literature

Functional analysis of hsp70 inhibitors.

Schlecht, R.Scholz, S.R.Dahmen, H.Wegener, A.Sirrenberg, C.Musil, D.Bomke, J.Eggenweiler, H.M.Mayer, M.P.Bukau, B.

(2013) Plos One 8: e78443-e78443

  • DOI: 10.1371/journal.pone.0078443

  • PubMed Abstract: 
  • The molecular chaperones of the Hsp70 family have been recognized as targets for anti-cancer therapy. Since several paralogs of Hsp70 proteins exist in cytosol, endoplasmic reticulum and mitochondria, we investigated which isoform needs to be down-re ...

    The molecular chaperones of the Hsp70 family have been recognized as targets for anti-cancer therapy. Since several paralogs of Hsp70 proteins exist in cytosol, endoplasmic reticulum and mitochondria, we investigated which isoform needs to be down-regulated for reducing viability of cancer cells. For two recently identified small molecule inhibitors, VER-155008 and 2-phenylethynesulfonamide (PES), which are proposed to target different sites in Hsp70s, we analyzed the molecular mode of action in vitro. We found that for significant reduction of viability of cancer cells simultaneous knockdown of heat-inducible Hsp70 (HSPA1) and constitutive Hsc70 (HSPA8) is necessary. The compound VER-155008, which binds to the nucleotide binding site of Hsp70, arrests the nucleotide binding domain (NBD) in a half-open conformation and thereby acts as ATP-competitive inhibitor that prevents allosteric control between NBD and substrate binding domain (SBD). Compound PES interacts with the SBD of Hsp70 in an unspecific, detergent-like fashion, under the conditions tested. None of the two inhibitors investigated was isoform-specific.


    Organizational Affiliation

    Zentrum für Molekulare Biologie der Universität Heidelberg (ZMBH), DKFZ-ZMBH-Alliance, Heidelberg, Germany.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Heat shock 70kDa protein 1A variant
A
382Homo sapiensMutation(s): 0 
Gene Names: HSPA1A (HSP72, HSPA1, HSX70)
Find proteins for P0DMV8 (Homo sapiens)
Go to Gene View: HSPA1A
Go to UniProtKB:  P0DMV8
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
3FD
Query on 3FD

Download SDF File 
Download CCD File 
A
4-[[(2R,3S,4R,5R)-5-[6-amino-8-[(3,4-dichlorophenyl)methylamino]purin-9-yl]-3,4-dihydroxy-oxolan-2-yl]methoxymethyl]benzonitrile
C25 H23 Cl2 N7 O4
ZXGGCBQORXDVTE-UMCMBGNQSA-N
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
3FDIC50: 500 - 10400 nM (99) BINDINGDB
3FDKi: 120 nM (99) BINDINGDB
3FDKd: 300 nM (99) BINDINGDB
3FDKd: 228 nM PDBBIND
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.58 Å
  • R-Value Free: 0.222 
  • R-Value Work: 0.169 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 58.680α = 90.00
b = 53.973β = 101.07
c = 70.796γ = 90.00
Software Package:
Software NamePurpose
XDSdata reduction
BUSTERrefinement
MOLREPphasing
XSCALEdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

  • Deposited Date: 2013-01-07 
  • Released Date: 2013-12-18 
  • Deposition Author(s): Musil, D., Scholz, S.

Revision History 

  • Version 1.0: 2013-12-18
    Type: Initial release