5ZR3

Crystal structure of Hsp90-alpha N-terminal domain in complex with 4-(3-isopropyl-4-(4-(1-methyl-1H-pyrazol-4-yl)-1H-imidazol-1-yl)-1H-pyrazolo[3,4-b]pyridin-1-yl)-3-methylbenzamide


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.5 Å
  • R-Value Free: 0.254 
  • R-Value Work: 0.202 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Discovery of 3-Ethyl-4-(3-isopropyl-4-(4-(1-methyl-1 H-pyrazol-4-yl)-1 H-imidazol-1-yl)-1 H-pyrazolo[3,4- b]pyridin-1-yl)benzamide (TAS-116) as a Potent, Selective, and Orally Available HSP90 Inhibitor.

Uno, T.Kawai, Y.Yamashita, S.Oshiumi, H.Yoshimura, C.Mizutani, T.Suzuki, T.Chong, K.T.Shigeno, K.Ohkubo, M.Kodama, Y.Muraoka, H.Funabashi, K.Takahashi, K.Ohkubo, S.Kitade, M.

(2019) J. Med. Chem. 62: 531-551

  • DOI: 10.1021/acs.jmedchem.8b01085

  • PubMed Abstract: 
  • The molecular chaperone heat shock protein 90 (HSP90) is a promising target for cancer therapy, as it assists in the stabilization of cancer-related proteins, promoting cancer cell growth, and survival. A novel series of HSP90 inhibitors were discove ...

    The molecular chaperone heat shock protein 90 (HSP90) is a promising target for cancer therapy, as it assists in the stabilization of cancer-related proteins, promoting cancer cell growth, and survival. A novel series of HSP90 inhibitors were discovered by structure-activity relationship (SAR)-based optimization of an initial hit compound 11a having a 4-(4-(quinolin-3-yl)-1 H-indol-1-yl)benzamide structure. The pyrazolo[3,4- b]pyridine derivative, 16e (TAS-116), is a selective inhibitor of HSP90α and HSP90β among the HSP90 family proteins and exhibits oral availability in mice. The X-ray cocrystal structure of the 16e analogue 16d demonstrated a unique binding mode at the N-terminal ATP binding site. Oral administration of 16e demonstrated potent antitumor effects in an NCI-H1975 xenograft mouse model without significant body weight loss.


    Organizational Affiliation

    Chemical Technology Laboratory, CMC Division , Taiho Pharmaceutical Co. Ltd. , Kamikawa-machi, Kodama-gun, Saitama 367-0241 , Japan.,Discovery and Preclinical Research Division , Taiho Pharmaceutical Co. Ltd. , Tsukuba , Ibaraki 300-2611 , Japan.,Formulation Research, CMC Division , Taiho Pharmaceutical Co. Ltd. , Kawauchi-cho, Tokushima 771-0194 , Japan.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Heat shock protein HSP 90-alpha
A, C, E, G
237Homo sapiensMutation(s): 0 
Gene Names: HSP90AA1 (HSP90A, HSPC1, HSPCA)
Find proteins for P07900 (Homo sapiens)
Go to Gene View: HSP90AA1
Go to UniProtKB:  P07900
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
9J0
Query on 9J0

Download SDF File 
Download CCD File 
A, C, E, G
3-methyl-4-{4-[4-(1-methyl-1H-pyrazol-4-yl)-1H-imidazol-1-yl]-3-(propan-2-yl)-1H-pyrazolo[3,4-b]pyridin-1-yl}benzamide
C24 H24 N8 O
JZYLVXOKNXFKFF-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.5 Å
  • R-Value Free: 0.254 
  • R-Value Work: 0.202 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 55.400α = 90.00
b = 95.210β = 91.30
c = 102.360γ = 90.00
Software Package:
Software NamePurpose
MOSFLMdata reduction
REFMACrefinement
MOLREPphasing
SCALAdata scaling
PDB_EXTRACTdata extraction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2019-01-02
    Type: Initial release
  • Version 1.1: 2019-05-01
    Type: Data collection, Database references