1O6L

Crystal structure of an activated Akt/protein kinase B (PKB-PIF chimera) ternary complex with AMP-PNP and GSK3 peptide

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.60 Å
  • R-Value Free: 0.227 
  • R-Value Work: 0.198 
  • R-Value Observed: 0.198 

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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: 10.1038/nsb870
  • Primary Citation of Related Structures:  
    1O6L, 1O6K

  • 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 ...

    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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(by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
RAC-BETA SERINE/THREONINE PROTEIN KINASEA337Homo sapiensMutation(s): 0 
Gene Names: AKT2
EC: 2.7.1 (PDB Primary Data), 2.7.11.1 (UniProt)
Find proteins for P31751 (Homo sapiens)
Explore P31751 
Go to UniProtKB:  P31751
NIH Common Fund Data Resources
PHAROS  P31751
GTEx  ENSG00000105221
Protein Feature View
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  • Reference Sequence
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
GLYCOGEN SYNTHASE KINASE-3 BETAC10Homo sapiensMutation(s): 0 
Gene Names: GSK3B
EC: 2.7.1.37 (PDB Primary Data), 2.7.11.26 (UniProt), 2.7.11.1 (UniProt)
Find proteins for P49841 (Homo sapiens)
Explore P49841 
Go to UniProtKB:  P49841
NIH Common Fund Data Resources
PHAROS  P49841
GTEx  ENSG00000082701
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ANP
Query on ANP
Download Ideal Coordinates CCD File 
A
PHOSPHOAMINOPHOSPHONIC ACID-ADENYLATE ESTER
C10 H17 N6 O12 P3
PVKSNHVPLWYQGJ-KQYNXXCUSA-N		 Ligand Interaction
MN
Query on MN
Download Ideal Coordinates CCD File 
A
MANGANESE (II) ION
Mn
WAEMQWOKJMHJLA-UHFFFAOYSA-N		 Ligand Interaction
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
TPO
Query on TPO		AL-PEPTIDE LINKINGC4 H10 N O6 PTHR
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.60 Å
  • R-Value Free: 0.227 
  • R-Value Work: 0.198 
  • R-Value Observed: 0.198 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 44.936α = 90
b = 60.997β = 90
c = 131.315γ = 90
Software Package:
Software NamePurpose
CNSrefinement
MOSFLMdata reduction
SCALAdata scaling
CNSphasing

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • 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