1O6K

Structure of activated form of PKB kinase domain S474D with GSK3 peptide and AMP-PNP


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.70 Å
  • R-Value Free: 0.234 
  • R-Value Work: 0.205 
  • R-Value Observed: 0.205 

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Ligand Structure Quality Assessment 


This is version 1.2 of the entry. See complete history


Literature

Crystal Structure of an Activated Akt/Protein Kinase B Ternary Complex with Gsk-3 Peptide and AMP-Pnp

Yang, J.Cron, P.Good, V.M.Thompson, V.Hemmings, B.A.Barford, D.

(2002) Nat Struct Biol 9: 940

  • DOI: https://doi.org/10.1038/nsb870
  • Primary Citation of Related Structures:  
    1O6K, 1O6L

  • PubMed Abstract: 

    The protein kinase Akt/PKB is stimulated by the phosphorylation of two regulatory residues, Thr 309 of the activation segment and Ser 474 of the hydrophobic motif (HM), that are structurally and functionally conserved within the AGC kinase family. To understand the mechanism of PKB regulation, we determined the crystal structures of activated kinase domains of PKB in complex with a GSK3beta-peptide substrate and an ATP analog. The activated state of the kinase was generated by phosphorylating Thr 309 using PDK1 and mimicking Ser 474 phosphorylation either with the S474D substitution or by replacing the HM of PKB with that of PIFtide, a potent mimic of a phosphorylated HM. Comparison with the inactive PKB structure indicates that the role of Ser 474 phosphorylation is to promote the engagement of the HM with the N-lobe of the kinase domain, promoting a disorder-to-order transition of the alphaC helix. The alphaC helix, by interacting with pThr 309, restructures and orders the activation segment, generating an active kinase conformation. Analysis of the interactions between PKB and the GSK3beta-peptide explains how PKB selects for protein substrates distinct from those of PKA.


  • Organizational Affiliation

    Section of Structural Biology, Institute of Cancer Research, Chester Beatty Laboratories, 237 Fulham Road, London, SW3 6JB, UK.


Macromolecules
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Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
RAC-BETA SERINE/THREONINE PROTEIN KINASE336Homo sapiensMutation(s): 1 
EC: 2.7.1
UniProt & NIH Common Fund Data Resources
Find proteins for P31751 (Homo sapiens)
Explore P31751 
Go to UniProtKB:  P31751
PHAROS:  P31751
GTEx:  ENSG00000105221 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP31751
Sequence Annotations
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  • Reference Sequence

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Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
GLYCOGEN SYNTHASE KINASE-3 BETAB [auth C]10Homo sapiensMutation(s): 0 
EC: 2.7.1.37
UniProt & NIH Common Fund Data Resources
Find proteins for P49841 (Homo sapiens)
Explore P49841 
Go to UniProtKB:  P49841
PHAROS:  P49841
GTEx:  ENSG00000082701 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP49841
Sequence Annotations
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  • Reference Sequence
Small Molecules
Modified Residues  1 Unique
IDChains TypeFormula2D DiagramParent
TPO
Query on TPO
A
L-PEPTIDE LINKINGC4 H10 N O6 PTHR
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.70 Å
  • R-Value Free: 0.234 
  • R-Value Work: 0.205 
  • R-Value Observed: 0.205 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 44.906α = 90
b = 60.998β = 90
c = 129.41γ = 90
Software Package:
Software NamePurpose
CNSrefinement
MOSFLMdata reduction
SCALAdata scaling
CNSphasing

Structure Validation

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Ligand Structure Quality Assessment 


Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2002-11-19
    Type: Initial release
  • Version 1.1: 2011-05-08
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance