Biological Assembly 1  

 3D View: Structure | Electron Density

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors and generated by PQS (software)

Macromolecule Content

• Total Structure Weight: 36.49 kDa 
• Atom Count: 2293 
• Modelled Residue Count: 272 
• Deposited Residue Count: 315 
• Unique protein chains: 1

1GZO

Structure of protein kinase B unphosphorylated

• DOI: 10.2210/pdb1GZO/pdb

• Classification: KINASE
• Organism(s): Homo sapiens
• Expression System: Spodoptera frugiperda
• Mutation(s): No 


• Deposited: 2002-05-24 Released: 2003-05-22 
• Deposition Author(s): Barford, D., Yang, J., Hemmings, B.A.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.75 Å
• R-Value Free: 0.310 
• R-Value Work: 0.248 
• R-Value Observed: 0.248 

Literature

Molecular Mechanism for the Regulation of Protein Kinase B/Akt by Hydrophobic Motif Phosphorylation

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

(2002) Mol Cell 9: 1227

• PubMed: 12086620 
• DOI: 10.1016/s1097-2765(02)00550-6
• Primary Citation of Related Structures:  
  1GZK, 1GZO, 1GZN


• PubMed Abstract: 
  

Protein kinase B/Akt plays crucial roles in promoting cell survival and mediating insulin responses. The enzyme is stimulated by phosphorylation at two regulatory sites: Thr 309 of the activation segment and Ser 474 of the hydrophobic motif, a conserved feature of many AGC kinases. Analysis of the crystal structures of the unphosphorylated and Thr 309 phosphorylated states of the PKB kinase domain provides a molecular explanation for regulation by Ser 474 phosphorylation. Activation by Ser 474 phosphorylation occurs via a disorder to order transition of the alphaC helix with concomitant restructuring of the activation segment and reconfiguration of the kinase bilobal structure. These conformational changes are mediated by a phosphorylation-promoted interaction of the hydrophobic motif with a channel on the N-terminal lobe induced by the ordered alphaC helix and are mimicked by peptides corresponding to the hydrophobic motif of PKB and potently by the hydrophobic motif of PRK2.

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Organizational Affiliation: 

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

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
RAC-BETA SERINE/THREONINE PROTEIN KINASE	A	315	Homo sapiens	Mutation(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

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.75 Å
• R-Value Free: 0.310 
• R-Value Work: 0.248 
• R-Value Observed: 0.248 
• Space Group: P 4₁ 2₁ 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 149.703	α = 90
b = 149.703	β = 90
c = 39.185	γ = 90

Software Package:

Software Name	Purpose
CNS	refinement
DENZO	data reduction
SCALEPACK	data scaling
CNS	phasing

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2002-05-24 
• Released Date: 2003-05-22 
Deposition Author(s): Barford, D., Yang, J., Hemmings, B.A.

Revision History  

• Version 1.0: 2003-05-22
  Type: Initial release
  
• Version 1.1: 2011-05-08
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance