4H5V

HSC70 NBD with Mg


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.75 Å
  • R-Value Free: 0.215 
  • R-Value Work: 0.182 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

New crystal structures of HSC-70 ATP binding domain confirm the role of individual binding pockets and suggest a new method of inhibition.

Zhang, Z.Cellitti, J.Teriete, P.Pellecchia, M.Stec, B.

(2015) Biochimie 108: 186-192

  • DOI: 10.1016/j.biochi.2014.11.012
  • Primary Citation of Related Structures:  4H5N, 4H5R, 4H5T, 4H5W

  • PubMed Abstract: 
  • In recent years the chaperone HSC-70 has become a target for drug design with a strong focus in anticancer therapies. In our study of possible inhibitors of HSC-70 enzymatic activity we screened compounds by NMR as well as X-ray crystallography. As p ...

    In recent years the chaperone HSC-70 has become a target for drug design with a strong focus in anticancer therapies. In our study of possible inhibitors of HSC-70 enzymatic activity we screened compounds by NMR as well as X-ray crystallography. As part of our screening efforts we crystallized the human HSC-70 ATP binding domain and obtained novel crystal forms in addition to known structures. The new crystal structures highlight the mobility of the entire domain previously described by NMR, which was linked to its chaperone activity but not yet demonstrated by X-ray crystallography. Conformational changes across the entire molecule have been elucidated in response to the binding of small molecule ligands and show a pattern of mobility consistent with postulated signal transduction modes between the nucleotide binding domain (NBD) and the substrate binding domain (SBD). In addition, two crystal structures contained glycerol bound at a new site. Binding studies performed with glycerol analogs proved inhibitory properties of the site, which were further characterized by isothermal calorimetry and in silico docking studies. The presence of two binding pockets enabled us to explore a novel method of inhibition by compounds that bridge the adjacent phosphate and glycerol binding sites. Finally, an example of such a bridged inhibitor is proposed.


    Organizational Affiliation

    Sanford-Burnham Medical Research Institute, 10901 N. Torrey Pines Rd., La Jolla, CA 92037, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Heat shock cognate 71 kDa protein
A
383Homo sapiensGene Names: HSPA8 (HSC70, HSP73, HSPA10)
Find proteins for P11142 (Homo sapiens)
Go to Gene View: HSPA8
Go to UniProtKB:  P11142
Small Molecules
Ligands 5 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

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A
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
ACT
Query on ACT

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Download CCD File 
A
ACETATE ION
C2 H3 O2
QTBSBXVTEAMEQO-UHFFFAOYSA-M
 Ligand Interaction
CL
Query on CL

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Download CCD File 
A
CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
 Ligand Interaction
GOL
Query on GOL

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Download CCD File 
A
GLYCEROL
GLYCERIN; PROPANE-1,2,3-TRIOL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
 Ligand Interaction
MG
Query on MG

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Download CCD File 
A
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.75 Å
  • R-Value Free: 0.215 
  • R-Value Work: 0.182 
  • Space Group: P 21 21 2
Unit Cell:
Length (Å)Angle (°)
a = 76.741α = 90.00
b = 102.175β = 90.00
c = 54.524γ = 90.00
Software Package:
Software NamePurpose
SCALEPACKdata scaling
REFMACrefinement
CrystalCleardata collection
HKL-2000data reduction
MOLREPphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

  • Deposited Date: 2012-09-18 
  • Released Date: 2014-03-19 
  • Deposition Author(s): Stec, B.

Revision History 

  • Version 1.0: 2014-03-19
    Type: Initial release
  • Version 1.1: 2014-12-17
    Type: Database references
  • Version 1.2: 2015-01-14
    Type: Database references