1XH5

Crystal Structures of Protein Kinase B Selective Inhibitors in Complex with Protein Kinase A and Mutants

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.05 Å
  • R-Value Free: 0.236 
  • R-Value Work: 0.182 
  • R-Value Observed: 0.185 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history. 


Literature

Design and crystal structures of protein kinase B-selective inhibitors in complex with protein kinase A and mutants

Breitenlechner, C.B., Friebe, W.-G., Brunet, E., Werner, G., Graul, K., Thomas, U., Kuenkele, K.-P., Schaefer, W., Gassel, M., Bossemeyer, D., Huber, R., Engh, R.A., Masjost, B.

(2005) J Med Chem 48: 163-170

  • DOI: 10.1021/jm049701n
  • Primary Citation of Related Structures:  
    1XH4, 1XH5, 1XH6, 1XH7, 1XH8, 1XH9, 1XHA

  • PubMed Abstract: 

    • Protein kinase B (PKB)-selective inhibitors were designed, synthesized, and cocrystallized using the AGC kinase family protein kinase A (PKA, often called cAMP-dependent protein kinase); PKA has been used as a surrogate for other members of this family and indeed for protein kinases in general ...

    Protein kinase B (PKB)-selective inhibitors were designed, synthesized, and cocrystallized using the AGC kinase family protein kinase A (PKA, often called cAMP-dependent protein kinase); PKA has been used as a surrogate for other members of this family and indeed for protein kinases in general. The high homology between PKA and PKB includes very similar ATP binding sites and hence similar binding pockets for inhibitors, with only few amino acids that differ between the two kinases. A series of these sites were mutated in PKA in order to improve the surrogate model for a design of PKB-selective inhibitors. Namely, the PKA to PKB exchanges F187L and Q84E enable the design of the selective inhibitors described herein which mimic ATP but extend further into a site not occupied by ATP. In this pocket, selectivity over PKA can be achieved by the introduction of bulkier substituents. Analysis of the cocrystal structures and binding studies were performed to rationalize the selectivity and improve the design.

    Related Citations: 
    • Structure-based optimization of novel azepane derivatives as PKB inhibitors
      Breitenlechner, C.B., Wegge, T., Berillon, L., Graul, K., Marzenell, K., Friebe, W.-G., Thomas, U., Schumacher, R., Huber, R., Engh, R.A., Masjost, B.
      (2004) J Med Chem 47: 1375
    Organizational Affiliation: 

    Abteilung Strukturforschung, Max-Planck-Institut fuer Biochemie, 82152 Martinsried, Germany.



Macromolecules
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(by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
cAMP-dependent protein kinase, alpha-catalytic subunitA350Bos taurusMutation(s): 2 
Gene Names: PRKACA
EC: 2.7.1.37 (PDB Primary Data), 2.7.11.11 (UniProt)
UniProt
Find proteins for P00517 (Bos taurus)
Explore P00517 
Go to UniProtKB:  P00517
Protein Feature View
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  • Reference Sequence
  • Find similar proteins by:  Sequence   |   Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
cAMP-dependent protein kinase inhibitor, alpha formB20N/AMutation(s): 0 
UniProt & NIH Common Fund Data Resources
Find proteins for P61925 (Homo sapiens)
Explore P61925 
Go to UniProtKB:  P61925
PHAROS:  P61925
GTEx:  ENSG00000171033
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
R68 (Subject of Investigation/LOI)
Query on R68
Download Ideal Coordinates CCD File 
C [auth A]N-{4-[(4-{3-[(2R)-3,3-DIMETHYLPIPERIDIN-2-YL]-2-FLUORO-6-HYDROXYBENZOYL}BENZOYL)AMINO]AZEPAN-3-YL}ISONICOTINAMIDE
C33 H38 F N5 O4
LLDRWTNKJQFSDC-KQZWIPHESA-N		 Ligand Interaction
BU3
Query on BU3
Download Ideal Coordinates CCD File 
D [auth A], E [auth A], F [auth B](R,R)-2,3-BUTANEDIOL
C4 H10 O2
OWBTYPJTUOEWEK-QWWZWVQMSA-N		 Ligand Interaction
Modified Residues  2 Unique
IDChainsTypeFormula2D DiagramParent
SEP
Query on SEP		AL-PEPTIDE LINKINGC3 H8 N O6 PSER
TPO
Query on TPO		AL-PEPTIDE LINKINGC4 H10 N O6 PTHR
Binding Affinity Annotations 
IDSourceBinding Affinity
R68 PDBBind:  1XH5 Kd: 3400 (nM) from 1 assay(s)
Binding MOAD:  1XH5 Kd: 3400 (nM) from 1 assay(s)
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.05 Å
  • R-Value Free: 0.236 
  • R-Value Work: 0.182 
  • R-Value Observed: 0.185 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 74.094α = 90
b = 76.806β = 90
c = 79.532γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
MOSFLMdata reduction
CCP4data scaling
AMoREphasing

Structure Validation

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View more in-depth experimental data

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2005-09-17
    Type: Initial release
  • Version 1.1: 2008-04-30
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance