3B26

Hsp90 alpha N-terminal domain in complex with an inhibitor Ro1127850

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.10 Å
  • R-Value Free: 0.205 
  • R-Value Work: 0.158 
  • R-Value Observed: 0.160 

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Literature

Lead generation of heat shock protein 90 inhibitors by a combination of fragment-based approach, virtual screening, and structure-based drug design

Miura, T., Fukami, T.A., Hasegawa, K., Ono, N., Suda, A., Shindo, H., Yoon, D.O., Kim, S.J., Na, Y.J., Aoki, Y., Shimma, N., Tsukuda, T., Shiratori, Y.

(2011) Bioorg Med Chem Lett 21: 5778-5783

  • DOI: 10.1016/j.bmcl.2011.08.001
  • Primary Citation of Related Structures:  
    3B24, 3B25, 3B26, 3B27, 3B28

  • PubMed Abstract: 

    • Heat shock protein 90 (Hsp90) is a molecular chaperone which regulates maturation and stabilization of its substrate proteins, known as client proteins. Many client proteins of Hsp90 are involved in tumor progression and survival and therefore Hsp90 can be a good target for developing anticancer drugs ...

    Heat shock protein 90 (Hsp90) is a molecular chaperone which regulates maturation and stabilization of its substrate proteins, known as client proteins. Many client proteins of Hsp90 are involved in tumor progression and survival and therefore Hsp90 can be a good target for developing anticancer drugs. With the aim of efficiently identifying a new class of orally available inhibitors of the ATP binding site of this protein, we conducted fragment screening and virtual screening in parallel against Hsp90. This approach quickly identified 2-aminotriazine and 2-aminopyrimidine derivatives as specific ligands to Hsp90 with high ligand efficiency. In silico evaluation of the 3D X-ray Hsp90 complex structures of the identified hits allowed us to promptly design CH5015765, which showed high affinity for Hsp90 and antitumor activity in human cancer xenograft mouse models.

    Organizational Affiliation: 

    Kamakura Research Laboratories, Chugai Pharmaceutical Co., Ltd, 200 Kajiwara, Kamakura, Kanagawa 247-8530, Japan. miuratka@chugai-pharm.co.jp



Macromolecules
Find similar proteins by: 
(by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Heat shock protein HSP 90-alphaA, B229Homo sapiensMutation(s): 0 
Gene Names: HSP90AA1, HSP90A, HSPC1, HSPCA
UniProt & NIH Common Fund Data Resources
Find proteins for P07900 (Homo sapiens)
Explore P07900 
Go to UniProtKB:  P07900
PHAROS:  P07900
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP07900
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
B2L
Query on B2L
Download Ideal Coordinates CCD File 
C [auth A]4-(1H,3H-benzo[de]isochromen-6-yl)-6-methylpyrimidin-2-amine
C17 H15 N3 O
RUGFWNOTXBMCJB-UHFFFAOYSA-N		 Ligand Interaction
Binding Affinity Annotations 
IDSourceBinding Affinity
B2L PDBBind:  3B26 Kd: 230 (nM) from 1 assay(s)
BindingDB:  3B26 Kd: 230 (nM) from 1 assay(s)
IC50: 6900 (nM) from 1 assay(s)
Binding MOAD:  3B26 Kd: 230 (nM) from 1 assay(s)
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.10 Å
  • R-Value Free: 0.205 
  • R-Value Work: 0.158 
  • R-Value Observed: 0.160 
  • Space Group: P 21 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 64.223α = 90
b = 88.704β = 90
c = 98.84γ = 90
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
MOLREPphasing
TNTrefinement
PDB_EXTRACTdata extraction
BUSTERrefinement

Structure Validation

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Ligand Structure Quality Assessment 


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Entry History 

Deposition Data

  • Deposited Date: 2011-07-21 
  • Released Date: 2011-09-14 
    • Deposition Author(s): Fukami, T.A., Ono, N.

Revision History  (Full details and data files)

  • Version 1.0: 2011-09-14
    Type: Initial release
  • Version 1.1: 2013-06-19
    Changes: Database references