2VKI

Structure of the PDK1 PH domain K465E mutant


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.80 Å
  • R-Value Free: 0.215 
  • R-Value Work: 0.173 
  • R-Value Observed: 0.175 

Starting Model: experimental
View more details

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Mutation of the Pdk1 Ph Domain Inhibits Protein Kinase B/Akt, Leading to Small Size and Insulin Resistance.

Bayascas, J.R.Wullschleger, S.Sakamoto, K.Garcia-Martinez, J.M.Clacher, C.Komander, D.Van Aalten, D.M.F.Boini, K.M.Lang, F.Lipina, C.Logie, L.Sutherland, C.Chudek, J.A.Van Diepen, J.A.Voshol, P.J.Lucocq, J.M.Alessi, D.R.

(2008) Mol Cell Biol 28: 3258

  • DOI: https://doi.org/10.1128/MCB.02032-07
  • Primary Citation of Related Structures:  
    2VKI

  • PubMed Abstract: 

    PDK1 activates a group of kinases, including protein kinase B (PKB)/Akt, p70 ribosomal S6 kinase (S6K), and serum and glucocorticoid-induced protein kinase (SGK), that mediate many of the effects of insulin as well as other agonists. PDK1 interacts with phosphoinositides through a pleckstrin homology (PH) domain. To study the role of this interaction, we generated knock-in mice expressing a mutant of PDK1 incapable of binding phosphoinositides. The knock-in mice are significantly small, insulin resistant, and hyperinsulinemic. Activation of PKB is markedly reduced in knock-in mice as a result of lower phosphorylation of PKB at Thr308, the residue phosphorylated by PDK1. This results in the inhibition of the downstream mTOR complex 1 and S6K1 signaling pathways. In contrast, activation of SGK1 or p90 ribosomal S6 kinase or stimulation of S6K1 induced by feeding is unaffected by the PDK1 PH domain mutation. These observations establish the importance of the PDK1-phosphoinositide interaction in enabling PKB to be efficiently activated with an animal model. Our findings reveal how reduced activation of PKB isoforms impinges on downstream signaling pathways, causing diminution of size as well as insulin resistance.


  • Organizational Affiliation

    MRC Protein Phosphorylation Unit, College of Life Sciences, University of Dundee, Dow Street, Dundee DD1 5EH, Scotland.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
3-PHOPSHOINOSITIDE DEPENDENT PROTEIN KINASE 1148Homo sapiensMutation(s): 1 
EC: 2.7.11.1
UniProt & NIH Common Fund Data Resources
Find proteins for O15530 (Homo sapiens)
Explore O15530 
Go to UniProtKB:  O15530
PHAROS:  O15530
GTEx:  ENSG00000140992 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupO15530
Sequence Annotations
Expand
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.80 Å
  • R-Value Free: 0.215 
  • R-Value Work: 0.173 
  • R-Value Observed: 0.175 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 34.009α = 90
b = 67.057β = 90
c = 67.802γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
DENZOdata reduction
SCALEPACKdata scaling
AMoREphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2008-05-13
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Advisory, Refinement description, Version format compliance
  • Version 1.2: 2023-12-13
    Changes: Data collection, Database references, Other, Refinement description