5NUJ

Engineered beta-lactoglobulin: variant I56F-L39A in complex with chlorpromazine (LG-FA-CLP)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.60 Å
  • R-Value Free: 0.331 
  • R-Value Work: 0.224 
  • R-Value Observed: 0.241 

wwPDB Validation   3D Report Full Report


Ligand Structure Quality Assessment 


This is version 1.1 of the entry. See complete history


Literature

The engineered beta-lactoglobulin with complementarity to the chlorpromazine chiral conformers.

Loch, J.I.Bonarek, P.Tworzydlo, M.Lazinska, I.Szydlowska, J.Lipowska, J.Rzesikowska, K.Lewinski, K.

(2018) Int J Biol Macromol 114: 85-96

  • DOI: 10.1016/j.ijbiomac.2018.03.074
  • Primary Citation of Related Structures:  
    5NUJ, 5NUK, 5NUM, 5NUN

  • PubMed Abstract: 
  • Chlorpromazine (CPZ) is a phenothiazine acting as dopamine antagonist. Aside from application in schizophrenia therapy, chlorpromazine is found to be a putative inhibitor of proteins involved in cancers, heritable autism disorder and prion diseases. Four new β-lactoglobulin variants with double or triple substitutions: I56F/L39A, F105L/L39A, I56F/L39A/M107F or F105L/L39A/M107F changing the shape of the binding pocket were produced and their chlorpromazine binding properties have been investigated by X-ray crystallography, circular dichroism, isothermal titration calorimetry and thermophoresis ...

    Chlorpromazine (CPZ) is a phenothiazine acting as dopamine antagonist. Aside from application in schizophrenia therapy, chlorpromazine is found to be a putative inhibitor of proteins involved in cancers, heritable autism disorder and prion diseases. Four new β-lactoglobulin variants with double or triple substitutions: I56F/L39A, F105L/L39A, I56F/L39A/M107F or F105L/L39A/M107F changing the shape of the binding pocket were produced and their chlorpromazine binding properties have been investigated by X-ray crystallography, circular dichroism, isothermal titration calorimetry and thermophoresis. The CD spectra and crystal structures revealed that mutations do not affect the protein overall structure but in comparison to WT protein, variants possessing I56F substitution had lower stability while mutation F105L increased melting temperature of the protein. The new variants showed affinity to chlorpromazine in the range 4.2-15.4 × 10 3  M -1 . The CD spectra and crystal structures revealed complementarity of the binding pocket shape, to only one chlorpromazine chiral conformer. The (aR)-CPZ was bonded to variants containing I56F substitution while variants with F105L substitution preferred (aS)-CPZ.


    Organizational Affiliation

    Jagiellonian University, Faculty of Chemistry, Gronostajowa 2, 30-387 Kraków, Poland. Electronic address: lewinski@chemia.uj.edu.pl.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Beta-lactoglobulinA162Bos taurusMutation(s): 4 
Gene Names: LGB
UniProt
Find proteins for P02754 (Bos taurus)
Explore P02754 
Go to UniProtKB:  P02754
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
Z80 (Subject of Investigation/LOI)
Query on Z80

Download Ideal Coordinates CCD File 
B [auth A]3-(2-chloro-10H-phenothiazin-10-yl)-N,N-dimethylpropan-1-amine
C17 H19 Cl N2 S
ZPEIMTDSQAKGNT-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.60 Å
  • R-Value Free: 0.331 
  • R-Value Work: 0.224 
  • R-Value Observed: 0.241 
  • Space Group: P 32 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 54.012α = 90
b = 54.012β = 90
c = 111.344γ = 120
Software Package:
Software NamePurpose
REFMACrefinement
CrysalisProdata reduction
Aimlessdata scaling
PHASERphasing

Structure Validation

View Full Validation Report



Ligand Structure Quality Assessment  



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Science CentrePoland2012/05/B/ST5/00278

Revision History  (Full details and data files)

  • Version 1.0: 2018-04-04
    Type: Initial release
  • Version 1.1: 2018-04-18
    Changes: Data collection, Database references