4QWM

KINETIC CRYSTALLOGRAPHY of ALPHA_E7-CARBOXYLESTERSE FROM LUCILLA CUPRINA - ABSORBED X-RAY DOSE 1.85 MGy


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.17 Å
  • R-Value Free: 0.234 
  • R-Value Work: 0.177 
  • R-Value Observed: 0.180 

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 

  • DOI: 10.1016/j.str.2016.04.009
  • Primary Citation of Related Structures:  
    4W1P, 4W1Q, 4W1R, 4W1S, 5IVD, 5IVI, 5IVH, 4QWM, 5CH3, 5CH5

  • 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 understanding of the role of protein dynamics in many enzymes ...

    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. Electronic address: colin.jackson@anu.edu.au.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
E3A570Lucilia cuprinaMutation(s): 6 
Gene Names: LcaE7
EC: 3.1.1
UniProt
Find proteins for Q25252 (Lucilia cuprina)
Explore Q25252 
Go to UniProtKB:  Q25252
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
DPF
Query on DPF

Download Ideal Coordinates CCD File 
B [auth A]DIETHYL HYDROGEN PHOSPHATE
C4 H11 O4 P
UCQFCFPECQILOL-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.17 Å
  • R-Value Free: 0.234 
  • R-Value Work: 0.177 
  • R-Value Observed: 0.180 
  • Space Group: C 2 2 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 48.49α = 90
b = 101β = 90
c = 222.059γ = 90
Software Package:
Software NamePurpose
ADSCdata collection
PHASERphasing
PHENIXrefinement
XDSdata reduction
SCALAdata scaling

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2015-07-22
    Type: Initial release
  • Version 1.1: 2016-06-15
    Changes: Database references