2V22

REPLACE: A strategy for Iterative Design of Cyclin Binding Groove Inhibitors

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.60 Å
  • R-Value Free: 0.277 
  • R-Value Work: 0.171 
  • R-Value Observed: 0.174 

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This is version 1.3 of the entry. See complete history. 


Literature

Replace: A Strategy for Iterative Design of Cyclin- Binding Groove Inhibitors

Andrews, M.J., Kontopidis, G., Mcinnes, C., Plater, A., Innes, L., Cowan, A., Jewsbury, P., Fischer, P.M.

(2006) Chembiochem 7: 1909

  • DOI: 10.1002/cbic.200600189
  • Primary Citation of Related Structures:  
    2V22, 2UUE

  • PubMed Abstract: 

    • We describe a drug-design strategy termed REPLACE (REplacement with Partial Ligand Alternatives through Computational Enrichment) in which nonpeptidic surrogates for specific determinants of known peptide ligands are identified in silico by using a core peptide-bound protein structure as a design anchor ...

    We describe a drug-design strategy termed REPLACE (REplacement with Partial Ligand Alternatives through Computational Enrichment) in which nonpeptidic surrogates for specific determinants of known peptide ligands are identified in silico by using a core peptide-bound protein structure as a design anchor. In the REPLACE application example, we present the effective replacement of two critical binding motifs in a lead protein-protein interaction inhibitor pentapeptide with more druglike phenyltriazole and diphenyl ether groups. These were identified through docking of fragment libraries into the volume of the cyclin-binding groove of CDK2/cyclin A vacated through truncation of the inhibitor peptide-binding determinants. Proof of concept for this strategy was obtained through the generation of potent peptide-small-molecule hybrids and by the confirmation of inhibitor-binding modes in X-ray crystal structures. This method therefore allows nonpeptide fragments to be identified without the requirement for a high-sensitivity binding assay and should be generally applicable in replacing amino acids as individual residues or groups in peptide inhibitors to generate pharmaceutically acceptable lead molecules.

    Related Citations: 
    • Differential Binding of Inhibitors to Active and Inactive Cdk2 Provides Insights for Drug Design
      Kontopidis, G., Mcinnes, C., Pandalaneni, S.R., Mcnae, I., Gibson, D., Mezna, M., Thomas, M., Wood, G., Wang, S., Walkinshaw, M.D., Fische, P.M.
      (2006) Chem Biol 13: 201
    Organizational Affiliation: 

    Cyclacel Limited, James Lindsay Place, Dundee, DD1 5JJ, UK. martin.andrews@glpg.com



Macromolecules
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(by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
CELL DIVISION PROTEIN KINASE 2A, C298Homo sapiensMutation(s): 0 
Gene Names: CDK2, CDKN2
EC: 2.7.1.37 (PDB Primary Data), 2.7.11.22 (UniProt)
UniProt & NIH Common Fund Data Resources
Find proteins for P24941 (Homo sapiens)
Explore P24941 
Go to UniProtKB:  P24941
PHAROS:  P24941
GTEx:  ENSG00000123374
Protein Feature View
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  • Reference Sequence
Find similar proteins by: 
(by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
CYCLIN-A2B, D259Homo sapiensMutation(s): 0 
Gene Names: CCNA2, CCN1, CCNA
UniProt & NIH Common Fund Data Resources
Find proteins for P20248 (Homo sapiens)
Explore P20248 
Go to UniProtKB:  P20248
PHAROS:  P20248
GTEx:  ENSG00000145386
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
C35 (Subject of Investigation/LOI)
Query on C35
Download Ideal Coordinates CCD File 
 E [auth B], F [auth D]N~2~-{[1-(4-CHLOROPHENYL)-5-METHYL-1H-1,2,4-TRIAZOL-3-YL]CARBONYL}-N~5~-(DIAMINOMETHYLIDENE)-L-ORNITHYL-L-LEUCYL-L-ISOLEUCYL-4-FLUORO-L-PHENYLALANINAMIDE
C37 H51 Cl F N11 O5
KPJZLROHGAJEAN-WRTIUAHLSA-N		 Ligand Interaction
Binding Affinity Annotations 
IDSourceBinding Affinity
C35 PDBBind:  2V22 IC50: 4100 (nM) from 1 assay(s)
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.60 Å
  • R-Value Free: 0.277 
  • R-Value Work: 0.171 
  • R-Value Observed: 0.174 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 74.693α = 90
b = 113.571β = 90
c = 156.025γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
MOSFLMdata reduction
SCALAdata scaling
MOLREPphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2008-01-29
    Type: Initial release
  • Version 1.1: 2011-05-08
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2019-08-21
    Changes: Data collection, Derived calculations