5LU6

Heptose isomerase mutant - H64Q


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.67 Å
  • R-Value Free: 0.226 
  • R-Value Work: 0.189 
  • R-Value Observed: 0.191 

wwPDB Validation   3D Report Full Report


Ligand Structure Quality Assessment 


This is version 1.3 of the entry. See complete history


Literature

A half-site multimeric enzyme achieves its cooperativity without conformational changes.

Vivoli, M.Pang, J.Harmer, N.J.

(2017) Sci Rep 7: 16529-16529

  • DOI: https://doi.org/10.1038/s41598-017-16421-2
  • Primary Citation of Related Structures:  
    5LTZ, 5LU5, 5LU6, 5LU7

  • PubMed Abstract: 

    Cooperativity is a feature many multimeric proteins use to control activity. Here we show that the bacterial heptose isomerase GmhA displays homotropic positive and negative cooperativity among its four protomers. Most similar proteins achieve this through conformational changes: GmhA instead employs a delicate network of hydrogen bonds, and couples pairs of active sites controlled by a unique water channel. This network apparently raises the Lewis acidity of the catalytic zinc, thus increasing the activity at one active site at the cost of preventing substrate from adopting a reactive conformation at the paired negatively cooperative site - a "half-site" behavior. Our study establishes the principle that multimeric enzymes can exploit this cooperativity without conformational changes to maximize their catalytic power and control. More broadly, this subtlety by which enzymes regulate functions could be used to explore new inhibitor design strategies.


  • Organizational Affiliation

    Department of Biosciences, University of Exeter, Stocker Road, Exeter, EX4 4QD, UK.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Phosphoheptose isomerase
A, B, C, D
196Burkholderia pseudomalleiMutation(s): 1 
Gene Names: gmhADP49_467
EC: 5.3.1.28
UniProt
Find proteins for Q93UJ2 (Burkholderia pseudomallei (strain K96243))
Explore Q93UJ2 
Go to UniProtKB:  Q93UJ2
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ93UJ2
Sequence Annotations
Expand
  • Reference Sequence
Small Molecules
Ligands 4 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
I22
Query on I22

Download Ideal Coordinates CCD File 
E [auth A],
H [auth B],
K [auth C],
M [auth D]
D-ALTRO-HEPT-2-ULOSE 7-PHOSPHATE
C7 H15 O10 P
JDTUMPKOJBQPKX-GBNDHIKLSA-N
PGE
Query on PGE

Download Ideal Coordinates CCD File 
J [auth B]TRIETHYLENE GLYCOL
C6 H14 O4
ZIBGPFATKBEMQZ-UHFFFAOYSA-N
GOL
Query on GOL

Download Ideal Coordinates CCD File 
G [auth A],
I [auth B],
Q [auth D]
GLYCEROL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
EDO
Query on EDO

Download Ideal Coordinates CCD File 
F [auth A],
L [auth C],
N [auth D],
O [auth D],
P [auth D]
1,2-ETHANEDIOL
C2 H6 O2
LYCAIKOWRPUZTN-UHFFFAOYSA-N
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.67 Å
  • R-Value Free: 0.226 
  • R-Value Work: 0.189 
  • R-Value Observed: 0.191 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 73.61α = 90
b = 84.61β = 90
c = 127.09γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
XDSdata reduction
SCALAdata scaling
MOLREPphasing

Structure Validation

View Full Validation Report



Ligand Structure Quality Assessment 


Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Royal SocietyUnited Kingdom2009/R2

Revision History  (Full details and data files)

  • Version 1.0: 2017-12-06
    Type: Initial release
  • Version 1.1: 2017-12-13
    Changes: Database references
  • Version 1.2: 2019-10-16
    Changes: Data collection
  • Version 1.3: 2024-05-08
    Changes: Data collection, Database references, Refinement description