5E9E

Crystal Structure of the Alpha-kinase Domain of Myosin-II Heavy Chain Kinase A in Complex with AMP-PNP


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.4 Å
  • R-Value Free: 0.236 
  • R-Value Work: 0.191 

wwPDB Validation 3D Report Full Report


This is version 1.0 of the entry. See complete history

Literature

Structure of the Dictyostelium Myosin-II Heavy Chain Kinase A (MHCK-A) alpha-kinase domain apoenzyme reveals a novel autoinhibited conformation.

Ye, Q.Yang, Y.van Staalduinen, L.Crawley, S.W.Liu, L.Brennan, S.Cote, G.P.Jia, Z.

(2016) Sci Rep 6: 26634-26634

  • DOI: 10.1038/srep26634
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • The α-kinases are a family of a typical protein kinases present in organisms ranging from protozoa to mammals. Here we report an autoinhibited conformation for the α-kinase domain of Dictyostelium myosin-II heavy chain kinase A (MHCK-A) in which nucl ...

    The α-kinases are a family of a typical protein kinases present in organisms ranging from protozoa to mammals. Here we report an autoinhibited conformation for the α-kinase domain of Dictyostelium myosin-II heavy chain kinase A (MHCK-A) in which nucleotide binding to the catalytic cleft, located at the interface between an N-terminal and C-terminal lobe, is sterically blocked by the side chain of a conserved arginine residue (Arg592). Previous α-kinase structures have shown that an invariant catalytic aspartic acid residue (Asp766) is phosphorylated. Unexpectedly, in the autoinhibited conformation the phosphoryl group is transferred to the adjacent Asp663, creating an interaction network that stabilizes the autoinhibited state. The results suggest that Asp766 phosphorylation may play both catalytic and regulatory roles. The autoinhibited structure also provides the first view of a phosphothreonine residue docked into the phospho-specific allosteric binding site (Pi-pocket) in the C-lobe of the α-kinase domain.


    Organizational Affiliation

    Department of Biomedical and Molecular Sciences, Queen's University, Kingston, ON, K7L 3N6, Canada.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Myosin-II heavy chain kinase A
A, B
307Dictyostelium discoideumMutation(s): 0 
Gene Names: mhkA (mhckA)
EC: 2.7.11.7
Find proteins for P42527 (Dictyostelium discoideum)
Go to UniProtKB:  P42527
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
PO4
Query on PO4

Download SDF File 
Download CCD File 
A, B
PHOSPHATE ION
O4 P
NBIIXXVUZAFLBC-UHFFFAOYSA-K
 Ligand Interaction
ZN
Query on ZN

Download SDF File 
Download CCD File 
A, B
ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
 Ligand Interaction
ANP
Query on ANP

Download SDF File 
Download CCD File 
A, B
PHOSPHOAMINOPHOSPHONIC ACID-ADENYLATE ESTER
C10 H17 N6 O12 P3
PVKSNHVPLWYQGJ-KQYNXXCUSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.4 Å
  • R-Value Free: 0.236 
  • R-Value Work: 0.191 
  • Space Group: P 21 21 2
Unit Cell:
Length (Å)Angle (°)
a = 82.601α = 90.00
b = 110.112β = 90.00
c = 78.265γ = 90.00
Software Package:
Software NamePurpose
REFMACrefinement
PDB_EXTRACTdata extraction
Cootmodel building
HKL-2000data reduction
PHASERphasing
HKL-2000data scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data

  • Deposited Date: 2015-10-15 
  • Released Date: 2016-06-08 
  • Deposition Author(s): Ye, Q., Jia, Z.

Funding OrganizationLocationGrant Number
Canadian Institutes of Health ResearchCanada--

Revision History 

  • Version 1.0: 2016-06-08
    Type: Initial release