1OL1

Cyclin A binding groove inhibitor H-Cit-Cit-Leu-Ile-(p-F-Phe)-NH2


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.90 Å
  • R-Value Free: 0.284 
  • R-Value Work: 0.206 
  • R-Value Observed: 0.209 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Insights Into Cyclin Groove Recognition. Complex Crystal Structures and Inhibitor Design Through Ligand Exchange

Kontopidis, G.Andrews, M.Mcinnes, C.Cowan, A.Powers, H.Innes, L.Plater, A.Griffiths, G.Paterson, D.Zheleva, D.Lane, D.Green, S.Walkinshaw, M.Fischer, P.

(2003) Structure 11: 1537

  • DOI: 10.1016/j.str.2003.11.006
  • Primary Citation of Related Structures:  
    1OL2, 1OL1, 1OKW, 1OKV

  • PubMed Abstract: 
  • Inhibition of CDK2/CA (cyclin-dependent kinase 2/cyclin A complex) activity through blocking of the substrate recognition site in the cyclin A subunit has been demonstrated to be an effective method for inducing apoptosis in tumor cells. We have used the cyclin binding motif (CBM) present in the tumor suppressor proteins p21(WAF1) and p27(KIP1) as a template to optimize the minimal sequence necessary for CDK2/CA inhibition ...

    Inhibition of CDK2/CA (cyclin-dependent kinase 2/cyclin A complex) activity through blocking of the substrate recognition site in the cyclin A subunit has been demonstrated to be an effective method for inducing apoptosis in tumor cells. We have used the cyclin binding motif (CBM) present in the tumor suppressor proteins p21(WAF1) and p27(KIP1) as a template to optimize the minimal sequence necessary for CDK2/CA inhibition. A series of peptides were prepared, containing nonnatural amino acids, which possess nano- to micromolar CDK2-inhibitory activity. Here we present X-ray structures of the protein complex CDK2/CA, together with the cyclin groove-bound peptides H-Ala-Ala-Abu-Arg-Ser-Leu-Ile-(p-F-Phe)-NH(2) (peptide 1), H-Arg-Arg-Leu-Ile-Phe-NH(2) (peptide 2), Ac-Arg-Arg-Leu-Asn-(m-Cl-Phe)-NH(2) (peptide 3), H-Arg-Arg-Leu-Asn-(p-F-Phe)-NH(2) (peptide 4), and H-Cit-Cit-Leu-Ile-(p-F-Phe)-NH(2) (peptide 5). Some of the peptide complexes presented here were obtained through the novel technique of ligand exchange within protein crystals. This method may find general application for obtaining complex structures of proteins with surface-bound ligands.


    Organizational Affiliation

    Cyclacel Ltd., James Lindsay Place, Dundee DD1 5JJ, Scotland, United Kingdom. gkontopidis@cyclacel.com



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
CELL DIVISION PROTEIN KINASE 2A, C298Homo sapiensMutation(s): 0 
Gene Names: CDK2CDKN2
EC: 2.7.1.37 (PDB Primary Data), 2.7.11.22 (UniProt)
Find proteins for P24941 (Homo sapiens)
Explore P24941 
Go to UniProtKB:  P24941
NIH Common Fund Data Resources
PHAROS:  P24941
Protein Feature View
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  • Reference Sequence
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
CYCLIN A2B, D260Homo sapiensMutation(s): 0 
Gene Names: CCNA2CCN1CCNA
Find proteins for P20248 (Homo sapiens)
Explore P20248 
Go to UniProtKB:  P20248
NIH Common Fund Data Resources
PHAROS:  P20248
Protein Feature View
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  • Reference Sequence
  • Find similar proteins by:  Sequence   |   Structure
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
CIR-CIR-LEU-ILE-PFF-NH2E [auth F], F [auth H]6synthetic constructMutation(s): 0 
Protein Feature View
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  • Reference Sequence
Small Molecules
Modified Residues  2 Unique
IDChainsTypeFormula2D DiagramParent
CIR
Query on CIR
E [auth F], F [auth H]L-PEPTIDE LINKINGC6 H13 N3 O3ARG
PFF
Query on PFF
E [auth F], F [auth H]L-PEPTIDE LINKINGC9 H10 F N O2PHE
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.90 Å
  • R-Value Free: 0.284 
  • R-Value Work: 0.206 
  • R-Value Observed: 0.209 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 74.498α = 90
b = 113.471β = 90
c = 154.482γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
MOSFLMdata reduction
SCALAdata scaling

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2003-12-11
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Atomic model, Database references, Derived calculations, Non-polymer description, Structure summary, Version format compliance
  • Version 1.2: 2017-02-15
    Changes: Database references, Source and taxonomy