Crystal structure of the mitotic kinesin eg5 (ksp) in complex with mg-adp and (r)-4-(3-hydroxyphenyl)-n,n,7,8-tetramethyl-3,4-dihydroisoquinoline-2(1h)-carboxamide

Experimental Data Snapshot

  • Resolution: 2.10 Å
  • R-Value Free: 0.305 
  • R-Value Work: 0.280 

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This is version 1.5 of the entry. See complete history


Inhibitors of human mitotic kinesin Eg5: Characterization of the 4-phenyl-tetrahydroisoquinoline lead series

Tarby, C.M.Kaltenbach III, R.F.Huynh, T.Pudzianowski, A.Shen, H.Ortega-Nanos, M.Sheriff, S.Newitt, J.A.McDonnell, P.A.Burford, N.Fairchild, C.R.Vaccaro, W.Chen, Z.Borzilleri, R.M.Naglich, J.Lombardo, L.J.Gottardis, M.Trainor, G.L.Roussell, D.L.

(2006) Bioorg Med Chem Lett 16: 2095-2100

  • DOI: https://doi.org/10.1016/j.bmcl.2006.01.056
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    In a high-throughput screening effort, a series of tetrahydroisoquinolines was identified as modest inhibitors of human Eg5. A medicinal chemistry optimization effort led to the identification of R-4-(3-hydroxyphenyl)-N,N-7,8-tetramethyl-3,4-dihydroisoquinoline-2(1H)-carboxamide (32a) as a potent inhibitor of human Eg5 (ATPase IC50 104 nM) with good anti-proliferative activity in A2780 cells (IC50 234 nM).

  • Organizational Affiliation

    Bristol-Myers Squibb Company, Route 206 and Province Line Road, Princeton, NJ 08543, USA. christine.tarby@bms.com

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Kinesin-like protein KIF11
A, B
368Homo sapiensMutation(s): 0 
Gene Names: KIF11EG5KNSL1
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
  • Reference Sequence
Small Molecules
Binding Affinity Annotations 
IDSourceBinding Affinity
3QC BindingDB:  2FME IC50: min: 104, max: 306 (nM) from 2 assay(s)
PDBBind:  2FME IC50: 104 (nM) from 1 assay(s)
Binding MOAD:  2FME IC50: 104 (nM) from 1 assay(s)
Experimental Data & Validation

Experimental Data

  • Resolution: 2.10 Å
  • R-Value Free: 0.305 
  • R-Value Work: 0.280 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 159.8α = 90
b = 80β = 96.5
c = 69.2γ = 90
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
PDB_EXTRACTdata extraction

Structure Validation

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Ligand Structure Quality Assessment 

Entry History 

Deposition Data

  • Released Date: 2006-04-18 
  • Deposition Author(s): Sheriff, S.

Revision History  (Full details and data files)

  • Version 1.0: 2006-04-18
    Type: Initial release
  • Version 1.1: 2008-05-01
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2017-10-18
    Changes: Refinement description
  • Version 1.4: 2024-02-14
    Changes: Data collection, Database references, Derived calculations
  • Version 1.5: 2024-04-03
    Changes: Refinement description