4AP0

The mitotic kinesin Eg5 in complex with Mg-ADP and ispinesib


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.594 Å
  • R-Value Free: 0.253 
  • R-Value Work: 0.203 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

The Structure of the Ternary Eg5-Adp-Ispinesib Complex

Talapatra, S.K.Schuettelkopf, A.W.Kozielski, F.

(2012) Acta Crystallogr.,Sect.D 68: 1311

  • DOI: 10.1107/S0907444912027965

  • PubMed Abstract: 
  • The human kinesin Eg5 is responsible for bipolar spindle formation during early mitosis. Inhibition of Eg5 triggers the formation of monoastral spindles, leading to mitotic arrest that eventually causes apoptosis. There is increasing evidence that Eg ...

    The human kinesin Eg5 is responsible for bipolar spindle formation during early mitosis. Inhibition of Eg5 triggers the formation of monoastral spindles, leading to mitotic arrest that eventually causes apoptosis. There is increasing evidence that Eg5 constitutes a potential drug target for the development of cancer chemotherapeutics. The most advanced Eg5-targeting agent is ispinesib, which exhibits potent antitumour activity and is currently in multiple phase II clinical trials. In this study, the crystal structure of the Eg5 motor domain in complex with ispinesib, supported by kinetic and thermodynamic binding data, is reported. Ispinesib occupies the same induced-fit pocket in Eg5 as other allosteric inhibitors, making extensive hydrophobic interactions with the protein. The data for the Eg5-ADP-ispinesib complex suffered from pseudo-merohedral twinning and revealed translational noncrystallographic symmetry, leading to challenges in data processing, space-group assignment and structure solution as well as in refinement. These complications may explain the lack of available structural information for this important agent and its analogues. The present structure represents the best interpretation of these data based on extensive data-reduction, structure-solution and refinement trials.


    Organizational Affiliation

    Molecular Motor Laboratory, The Beatson Institute for Cancer Research, Garscube Estate, Switchback Road, Bearsden, Glasgow G61 1BD, Scotland, UK. s.talapatra@beatson.gla.ac.uk




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
KINESIN-LIKE PROTEIN KIF11
A, B, C, D
370Homo sapiensMutation(s): 0 
Gene Names: KIF11 (EG5, KNSL1, TRIP5)
Find proteins for P52732 (Homo sapiens)
Go to Gene View: KIF11
Go to UniProtKB:  P52732
Small Molecules
Ligands 4 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ADP
Query on ADP

Download SDF File 
Download CCD File 
A, B, C, D
ADENOSINE-5'-DIPHOSPHATE
C10 H15 N5 O10 P2
XTWYTFMLZFPYCI-KQYNXXCUSA-N
 Ligand Interaction
CL
Query on CL

Download SDF File 
Download CCD File 
A, B, D
CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
 Ligand Interaction
MG
Query on MG

Download SDF File 
Download CCD File 
A, B, C, D
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
G7X
Query on G7X

Download SDF File 
Download CCD File 
A, B, C, D
ISPINESIB MESILATE
C30 H33 Cl N4 O2
QJZRFPJCWMNVAV-HHHXNRCGSA-N
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
G7XIC50: 1.2 - 47 nM (100) BINDINGDB
G7XKi: 2.3 - 2.5 nM (100) BINDINGDB
G7XKd: 10 nM PDBBIND
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.594 Å
  • R-Value Free: 0.253 
  • R-Value Work: 0.203 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 64.723α = 90.00
b = 112.607β = 90.02
c = 106.913γ = 90.00
Software Package:
Software NamePurpose
PHENIXrefinement
XDSdata reduction
MOLREPphasing
XSCALEdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2012-09-26
    Type: Initial release
  • Version 1.1: 2012-10-03
    Type: Database references
  • Version 1.2: 2019-05-08
    Type: Data collection, Experimental preparation, Other