1OKZ

Structure of human PDK1 kinase domain in complex with UCN-01


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.51 Å
  • R-Value Free: 0.257 
  • R-Value Work: 0.190 
  • R-Value Observed: 0.190 

wwPDB Validation   3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

Structural Basis for Ucn-01 (7-Hydroxystaurosporine) Specificity and Pdk1 (3-Phosphoinositide-Dependent Protein Kinase-1) Inhibition

Komander, D.Kular, G.S.Bain, J.Elliot, M.Alessi, D.R.Van Aalten, D.M.F.

(2003) Biochem J 375: 255

  • DOI: 10.1042/BJ20031119
  • Primary Citation of Related Structures:  
    1OKZ, 1OKY

  • PubMed Abstract: 
  • PDK1 (3-phosphoinositide-dependent protein kinase-1) is a member of the AGC (cAMP-dependent, cGMP-dependent, protein kinase C) family of protein kinases, and has a key role in insulin and growth-factor signalling through phosphorylation and subsequent activation of a number of other AGC kinase family members, such as protein kinase B ...

    PDK1 (3-phosphoinositide-dependent protein kinase-1) is a member of the AGC (cAMP-dependent, cGMP-dependent, protein kinase C) family of protein kinases, and has a key role in insulin and growth-factor signalling through phosphorylation and subsequent activation of a number of other AGC kinase family members, such as protein kinase B. The staurosporine derivative UCN-01 (7-hydroxystaurosporine) has been reported to be a potent inhibitor for PDK1, and is currently undergoing clinical trials for the treatment of cancer. Here, we report the crystal structures of staurosporine and UCN-01 in complex with the kinase domain of PDK1. We show that, although staurosporine and UCN-01 interact with the PDK1 active site in an overall similar manner, the UCN-01 7-hydroxy group, which is not present in staurosporine, generates direct and water-mediated hydrogen bonds with active-site residues. Inhibition data from UCN-01 tested against a panel of 29 different kinases show a different pattern of inhibition compared with staurosporine. We discuss how these differences in inhibition could be attributed to specific interactions with the additional 7-hydroxy group, as well as the size of the 7-hydroxy-group-binding pocket. This information could lead to opportunities for structure-based optimization of PDK1 inhibitors.


    Organizational Affiliation

    Division of Biological Chemistry and Molecular Microbiology, School of Life Sciences, University of Dundee, Dundee DD1 5EH, Scotland, UK.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
3-PHOSPHOINOSITIDE DEPENDENT PROTEIN KINASE 1A310Homo sapiensMutation(s): 0 
Gene Names: PDPK1PDK1
EC: 2.7.1.37 (PDB Primary Data), 2.7.11.1 (UniProt)
UniProt & NIH Common Fund Data Resources
Find proteins for O15530 (Homo sapiens)
Explore O15530 
Go to UniProtKB:  O15530
PHAROS:  O15530
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
SEP
Query on SEP
AL-PEPTIDE LINKINGC3 H8 N O6 PSER
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
UCNIC50:  6   nM  BindingDB
UCNIC50:  5   nM  BindingDB
UCNIC50 :  5   nM  PDBBind
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.51 Å
  • R-Value Free: 0.257 
  • R-Value Work: 0.190 
  • R-Value Observed: 0.190 
  • Space Group: P 32 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 123.387α = 90
b = 123.387β = 90
c = 47.115γ = 120
Software Package:
Software NamePurpose
CNSrefinement
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: 2004-07-29
    Type: Initial release
  • Version 1.1: 2011-05-08
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2019-04-24
    Changes: Data collection, Derived calculations, Other, Source and taxonomy