3HQN

Apo crystal structure of Leishmania mexicana(LmPYK)pyruvate kinase


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.00 Å
  • R-Value Free: 0.209 
  • R-Value Work: 0.169 
  • R-Value Observed: 0.171 

Starting Model: experimental
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wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

The allosteric mechanism of pryuvate kinase from Leishmania mexicana: a rock and lock model

Morgan, H.P.McNae, I.W.Nowicki, M.W.Hannaert, V.Michels, P.A.M.Fothergill-Gilmore, L.A.Walkinshaw, M.D.

(2010) J Biol Chem 285: 12892-12898

  • DOI: https://doi.org/10.1074/jbc.M109.079905
  • Primary Citation of Related Structures:  
    3HQN, 3HQO, 3HQP, 3HQQ

  • PubMed Abstract: 

    Allosteric regulation provides a rate management system for enzymes involved in many cellular processes. Ligand-controlled regulation is easily recognizable, but the underlying molecular mechanisms have remained elusive. We have obtained the first complete series of allosteric structures, in all possible ligated states, for the tetrameric enzyme, pyruvate kinase, from Leishmania mexicana. The transition between inactive T-state and active R-state is accompanied by a simple symmetrical 6 degrees rigid body rocking motion of the A- and C-domain cores in each of the four subunits. However, formation of the R-state in this way is only part of the mechanism; eight essential salt bridge locks that form across the C-C interface provide tetramer rigidity with a coupled 7-fold increase in rate. The results presented here illustrate how conformational changes coupled with effector binding correlate with loss of flexibility and increase in thermal stability providing a general mechanism for allosteric control.


  • Organizational Affiliation

    Structural Biochemistry Group, Institute of Structural and Molecular Biology, University of Edinburgh, Michael Swann Building, King's Buildings, Mayfield Road, Edinburgh EH9 3JR, Scotland, United Kingdom.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Pyruvate kinaseA [auth D],
B [auth A]
499Leishmania mexicanaMutation(s): 0 
Gene Names: PYK
EC: 2.7.1.40
UniProt
Find proteins for Q27686 (Leishmania mexicana)
Explore Q27686 
Go to UniProtKB:  Q27686
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ27686
Sequence Annotations
Expand
  • Reference Sequence
Small Molecules
Ligands 3 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

Download Ideal Coordinates CCD File 
E [auth D],
I [auth A]
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
GOL
Query on GOL

Download Ideal Coordinates CCD File 
C [auth D],
D,
H [auth A]
GLYCEROL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
K
Query on K

Download Ideal Coordinates CCD File 
F [auth D],
G [auth D],
J [auth A],
K [auth A]
POTASSIUM ION
K
NPYPAHLBTDXSSS-UHFFFAOYSA-N
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.00 Å
  • R-Value Free: 0.209 
  • R-Value Work: 0.169 
  • R-Value Observed: 0.171 
  • Space Group: I 2 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 120.579α = 90
b = 167.333β = 90
c = 132.199γ = 90
Software Package:
Software NamePurpose
DNAdata collection
PHASERphasing
REFMACrefinement
SCALAdata scaling

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2010-02-16
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Advisory, Refinement description, Version format compliance
  • Version 1.2: 2023-11-01
    Changes: Data collection, Database references, Derived calculations, Refinement description