2ZV2

Crystal structure of human calcium/calmodulin-dependent protein kinase kinase 2, beta, CaMKK2 kinase domain in complex with STO-609


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.4 Å
  • R-Value Free: 0.252 
  • R-Value Work: 0.203 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Crystal structure of the Ca2+/calmodulin-dependent protein kinase kinase in complex with the inhibitor STO-609

Kukimoto-Niino, M.Yoshikawa, S.Takagi, T.Ohsawa, N.Tomabechi, Y.Terada, T.Shirouzu, M.Suzuki, A.Lee, S.Yamauchi, T.Okada-Iwabu, M.Iwabu, M.Kadowaki, T.Minokoshi, Y.Yokoyama, S.

(2011) J.Biol.Chem. 286: 22570-22579

  • DOI: 10.1074/jbc.M111.251710

  • PubMed Abstract: 
  • Ca(2+)/calmodulin (CaM)-dependent protein kinase (CaMK) kinase (CaMKK) is a member of the CaMK cascade that mediates the response to intracellular Ca(2+) elevation. CaMKK phosphorylates and activates CaMKI and CaMKIV, which directly activate transcri ...

    Ca(2+)/calmodulin (CaM)-dependent protein kinase (CaMK) kinase (CaMKK) is a member of the CaMK cascade that mediates the response to intracellular Ca(2+) elevation. CaMKK phosphorylates and activates CaMKI and CaMKIV, which directly activate transcription factors. In this study, we determined the 2.4 Å crystal structure of the catalytic kinase domain of the human CaMKKβ isoform complexed with its selective inhibitor, STO-609. The structure revealed that CaMKKβ lacks the αD helix and that the equivalent region displays a hydrophobic molecular surface, which may reflect its unique substrate recognition and autoinhibition. Although CaMKKβ lacks the activation loop phosphorylation site, the activation loop is folded in an active-state conformation, which is stabilized by a number of interactions between amino acid residues conserved among the CaMKK isoforms. An in vitro analysis of the kinase activity confirmed the intrinsic activity of the CaMKKβ kinase domain. Structure and sequence analyses of the STO-609-binding site revealed amino acid replacements that may affect the inhibitor binding. Indeed, mutagenesis demonstrated that the CaMKKβ residue Pro(274), which replaces the conserved acidic residue of other protein kinases, is an important determinant for the selective inhibition by STO-609. Therefore, the present structure provides a molecular basis for clarifying the known biochemical properties of CaMKKβ and for designing novel inhibitors targeting CaMKKβ and the related protein kinases.


    Organizational Affiliation

    RIKEN Systems and Structural Biology Center, Yokohama 230-0045, Japan.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Calcium/calmodulin-dependent protein kinase kinase 2
A
298Homo sapiensMutation(s): 0 
Gene Names: CAMKK2 (CAMKKB, KIAA0787)
EC: 2.7.11.17
Find proteins for Q96RR4 (Homo sapiens)
Go to Gene View: CAMKK2
Go to UniProtKB:  Q96RR4
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
609
Query on 609

Download SDF File 
Download CCD File 
A
7-oxo-7H-benzimidazo[2,1-a]benz[de]isoquinoline-3-carboxylic acid
C19 H10 N2 O3
MYKOWOGZBMOVBJ-UHFFFAOYSA-N
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
609IC50: 10 - 24200 nM (100) BINDINGDB
609IC50: 500 nM PDBBIND
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.4 Å
  • R-Value Free: 0.252 
  • R-Value Work: 0.203 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 67.368α = 90.00
b = 77.153β = 90.00
c = 84.332γ = 90.00
Software Package:
Software NamePurpose
PHASERphasing
HKL-2000data reduction
SCALEPACKdata scaling
CNSrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2009-11-03
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance
  • Version 1.2: 2013-11-20
    Type: Database references