4BBG

Crystal structure of human kinesin Eg5 in complex with 3-(((2-Aminoethyl)sulfanyl)(3-ethylphenyl) phenylmethyl)phenol


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.75 Å
  • R-Value Free: 0.230 
  • R-Value Work: 0.182 
  • R-Value Observed: 0.185 

Starting Model: experimental
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wwPDB Validation   3D Report Full Report


Ligand Structure Quality Assessment 


This is version 1.1 of the entry. See complete history


Literature

Optimized S-Trityl-L-Cysteine-Based Inhibitors of Kinesin Spindle Protein with Potent in Vivo Antitumor Activity in Lung Cancer Xenograft Models.

Good, J.A.D.Wang, F.Rath, O.Kaan, H.Y.K.Talapatra, S.K.Podgorski, D.Mackay, S.P.Kozielski, F.

(2013) J Med Chem 56: 1878

  • DOI: https://doi.org/10.1021/jm3014597
  • Primary Citation of Related Structures:  
    4BBG

  • PubMed Abstract: 

    The mitotic kinesin Eg5 is critical for the assembly of the mitotic spindle and is a promising chemotherapy target. Previously, we identified S-trityl-L-cysteine as a selective inhibitor of Eg5 and developed triphenylbutanamine analogues with improved potency, favorable drug-like properties, but moderate in vivo activity. We report here their further optimization to produce extremely potent inhibitors of Eg5 (K(i)(app) < 10 nM) with broad-spectrum activity against cancer cell lines comparable to the Phase II drug candidates ispinesib and SB-743921. They have good oral bioavailability and pharmacokinetics and induced complete tumor regression in nude mice explanted with lung cancer patient xenografts. Furthermore, they display fewer liabilities with CYP-metabolizing enzymes and hERG compared with ispinesib and SB-743921, which is important given the likely application of Eg5 inhibitors in combination therapies. We present the case for this preclinical series to be investigated in single and combination chemotherapies, especially targeting hematological malignancies.


  • Organizational Affiliation

    Molecular Motors Laboratory, The Beatson Institute for Cancer Research, Garscube Estate, Switchback Road, Glasgow G61 1BD, Scotland, UK. james.good@chem.umu.se


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
KINESIN-LIKE PROTEIN KIF11368Homo sapiensMutation(s): 0 
UniProt & NIH Common Fund Data Resources
Find proteins for P52732 (Homo sapiens)
Explore P52732 
Go to UniProtKB:  P52732
PHAROS:  P52732
GTEx:  ENSG00000138160 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP52732
Sequence Annotations
Expand
  • Reference Sequence
Small Molecules
Ligands 4 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
ADP
Query on ADP

Download Ideal Coordinates CCD File 
B [auth A]ADENOSINE-5'-DIPHOSPHATE
C10 H15 N5 O10 P2
XTWYTFMLZFPYCI-KQYNXXCUSA-N
V02
Query on V02

Download Ideal Coordinates CCD File 
G [auth A]3-[(R)-2-azanylethylsulfanyl-(3-ethylphenyl)-phenyl-methyl]phenol
C23 H25 N O S
LKEJFEOGGYEWTI-HSZRJFAPSA-N
CL
Query on CL

Download Ideal Coordinates CCD File 
D [auth A],
E [auth A],
F [auth A],
H [auth A],
I [auth A]
CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
MG
Query on MG

Download Ideal Coordinates CCD File 
C [auth A]MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
Binding Affinity Annotations 
IDSourceBinding Affinity
V02 PDBBind:  4BBG Ki: 4.8 (nM) from 1 assay(s)
BindingDB:  4BBG Ki: 4.8 (nM) from 1 assay(s)
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.75 Å
  • R-Value Free: 0.230 
  • R-Value Work: 0.182 
  • R-Value Observed: 0.185 
  • Space Group: I 21 3
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 158.19α = 90
b = 158.19β = 90
c = 158.19γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
iMOSFLMdata reduction
SCALAdata scaling
PHASERphasing

Structure Validation

View Full Validation Report



Ligand Structure Quality Assessment 


Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2013-05-15
    Type: Initial release
  • Version 1.1: 2023-12-20
    Changes: Data collection, Database references, Derived calculations, Other, Refinement description