4TUN

Crystal structure of Chicken egg white lysozyme adduct with Organophosphorus pesticide Monochrotophos


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.925 Å
  • R-Value Free: 0.229 
  • R-Value Work: 0.172 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Biophysical aspects of lysozyme adduct with monocrotophos.

Amaraneni, S.R.Kumar, S.Gourinath, S.

(2014) Anal Bioanal Chem 406: 5477-5485

  • DOI: 10.1007/s00216-014-7953-y

  • PubMed Abstract: 
  • The present study on in vitro formation and characterization of lysozyme adduct with monocrotophos (MP) evaluates the potential of lysozyme to be used as a sensitive biomarker to monitor exposure levels to the commonly used organophosphorus pesticide ...

    The present study on in vitro formation and characterization of lysozyme adduct with monocrotophos (MP) evaluates the potential of lysozyme to be used as a sensitive biomarker to monitor exposure levels to the commonly used organophosphorus pesticide monocrotophos. Crystallization of lysozyme protein adduct with monocrotophos was also undertaken to understand the adduct formation mechanism at a molecular level. The binding of organophosphorus pesticides to lysozyme is one of the key steps in their mutagenicity. The formation and structural characterization of lysozyme adduct with monocrotophos was done using MALDI-TOFMS, fluorescence, UV/Vis spectroscopy, circular dichroism, and X-ray diffraction studies. We report the crystal structure of lysozyme adduct with monocrotophos at 1.9 Å. It crystallized in the P43 space group with two monomers in one asymmetric unit having one molecule of monocrotophos bound to each protein chain. The results proved that the fluorescence quenching of lysozyme by monocrotophos is due to binding of monocrotophos with a tryptophan residue of lysozyme. Monocrotophos interacts most strongly with the Trp-108 and Asp-52 of lysozyme. The interactions of the monocrotophos molecule with the lysozyme suggest the formation of a stable adduct. In addition, the alteration of lysozyme secondary structure in the presence of monocrotophos was confirmed by circular dichroism and fluorescence inhibition of lysozyme by increasing monocrotophos and UV/Vis spectrophotometry. The formation of lysozyme adduct with monocrotophos was confirmed by MALDI-TOFMS.


    Organizational Affiliation

    Department of Chemistry, Alliance College of Engineering and Design, Alliance University, Bangalore, 562106, India, sramaraneni@yahoo.com.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Lysozyme C
A, B
129Gallus gallusGene Names: LYZ
EC: 3.2.1.17
Find proteins for P00698 (Gallus gallus)
Go to Gene View: LYZ
Go to UniProtKB:  P00698
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ACT
Query on ACT

Download SDF File 
Download CCD File 
B
ACETATE ION
C2 H3 O2
QTBSBXVTEAMEQO-UHFFFAOYSA-M
 Ligand Interaction
MVH
Query on MVH

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Download CCD File 
A, B
methyl [4-(methylamino)-4-oxidanylidene-but-2-en-2-yl] hydrogen phosphate
C6 H12 N O5 P
SBZAFHSOQLENTI-SNAWJCMRSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.925 Å
  • R-Value Free: 0.229 
  • R-Value Work: 0.172 
  • Space Group: P 43
Unit Cell:
Length (Å)Angle (°)
a = 78.720α = 90.00
b = 78.720β = 90.00
c = 37.020γ = 90.00
Software Package:
Software NamePurpose
REFMACrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2014-07-09
    Type: Initial release
  • Version 1.1: 2014-10-01
    Type: Database references
  • Version 1.2: 2017-08-09
    Type: Derived calculations, Other, Source and taxonomy