5MKS

HSP72-NBD bound to compound TCI 8 - Tyr15 in down-conformation


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.99 Å
  • R-Value Free: 0.255 
  • R-Value Work: 0.201 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

An Irreversible Inhibitor of HSP72 that Unexpectedly Targets Lysine-56.

Pettinger, J.Le Bihan, Y.V.Widya, M.van Montfort, R.L.Jones, K.Cheeseman, M.D.

(2017) Angew. Chem. Int. Ed. Engl. 56: 3536-3540

  • DOI: 10.1002/anie.201611907
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • The stress-inducible molecular chaperone, HSP72, is an important therapeutic target in oncology, but inhibiting this protein with small molecules has proven particularly challenging. Validating HSP72 inhibitors in cells is difficult owing to competit ...

    The stress-inducible molecular chaperone, HSP72, is an important therapeutic target in oncology, but inhibiting this protein with small molecules has proven particularly challenging. Validating HSP72 inhibitors in cells is difficult owing to competition with the high affinity and abundance of its endogenous nucleotide substrates. We hypothesized this could be overcome using a cysteine-targeted irreversible inhibitor. Using rational design, we adapted a validated 8-N-benzyladenosine ligand for covalent bond formation and confirmed targeted irreversible inhibition. However, no cysteine in the protein was modified; instead, we demonstrate that lysine-56 is the key nucleophilic residue. Targeting this lysine could lead to a new design paradigm for HSP72 chemical probes and drugs.


    Organizational Affiliation

    Proteomics Core Facility, The Institute of Cancer Research, London, SW7 3RP, UK.,Division of Structural Biology, The Institute of Cancer Research, London, SW7 3RP, UK.,Cancer Research UK Cancer Therapeutics Unit, The Institute of Cancer Research, London, SW7 3RP, UK.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Heat shock 70 kDa protein 1A
A
394Homo 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
TI8
Query on TI8

Download SDF File 
Download CCD File 
A
3-[(2~{R},3~{S},4~{R},5~{R})-5-[6-azanyl-8-[(4-chlorophenyl)methylamino]purin-9-yl]-3,4-bis(oxidanyl)oxolan-2-yl]propyl prop-2-enoate
C22 H25 Cl N6 O5
XOSUZIPWVSJZRF-HAXDFEGKSA-N
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
TI8Ki: 17000 nM BINDINGMOAD
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.99 Å
  • R-Value Free: 0.255 
  • R-Value Work: 0.201 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 46.637α = 90.00
b = 83.672β = 90.00
c = 99.210γ = 90.00
Software Package:
Software NamePurpose
PHASERphasing
Aimlessdata scaling
BUSTERrefinement
XDSdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Cancer Research UKUnited KingdomC309/A8274
Cancer Research UKUnited KingdomC309/A11566

Revision History 

  • Version 1.0: 2017-03-01
    Type: Initial release
  • Version 1.1: 2017-03-29
    Type: Database references