5CH5

E3 alpha-esterase-7 carboxylesterase


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.53 Å
  • R-Value Free: 0.238 
  • R-Value Work: 0.198 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Mapping the Accessible Conformational Landscape of an Insect Carboxylesterase Using Conformational Ensemble Analysis and Kinetic Crystallography.

Correy, G.J.Carr, P.D.Meirelles, T.Mabbitt, P.D.Fraser, N.J.Weik, M.Jackson, C.J.

(2016) Structure 24: 977-987

  • DOI: 10.1016/j.str.2016.04.009
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • The proper function of enzymes often depends upon their efficient interconversion between particular conformational sub-states on a free-energy landscape. Experimentally characterizing these sub-states is challenging, which has limited our understand ...

    The proper function of enzymes often depends upon their efficient interconversion between particular conformational sub-states on a free-energy landscape. Experimentally characterizing these sub-states is challenging, which has limited our understanding of the role of protein dynamics in many enzymes. Here, we have used a combination of kinetic crystallography and detailed analysis of crystallographic protein ensembles to map the accessible conformational landscape of an insect carboxylesterase (LcαE7) as it traverses all steps in its catalytic cycle. LcαE7 is of special interest because of its evolving role in organophosphate insecticide resistance. Our results reveal that a dynamically coupled network of residues extends from the substrate-binding site to a surface loop. Interestingly, the coupling of this network that is apparent in the apoenzyme appears to be reduced in the phosphorylated enzyme intermediate. Altogether, the results of this work highlight the importance of protein dynamics to enzyme function and the evolution of new activity.


    Organizational Affiliation

    Research School of Chemistry, Australian National University, Canberra, ACT 0200, Australia.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Carboxylic ester hydrolase
A
577Lucilia cuprinaMutation(s): 7 
Gene Names: LcaE7
EC: 3.1.1.-
Find proteins for Q25252 (Lucilia cuprina)
Go to UniProtKB:  Q25252
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
DPF
Query on DPF

Download SDF File 
Download CCD File 
A
DIETHYL HYDROGEN PHOSPHATE
C4 H11 O4 P
UCQFCFPECQILOL-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.53 Å
  • R-Value Free: 0.238 
  • R-Value Work: 0.198 
  • Space Group: C 2 2 21
Unit Cell:
Length (Å)Angle (°)
a = 51.816α = 90.00
b = 101.254β = 90.00
c = 225.818γ = 90.00
Software Package:
Software NamePurpose
REFMACrefinement
PHASERphasing
Aimlessdata scaling
XDSdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2016-06-15
    Type: Initial release
  • Version 1.1: 2016-06-22
    Type: Database references