6R68

Crystal structure of transthyretin in complex with CHF4795, a flurbiprofen analogue


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.45 Å
  • R-Value Free: 0.198 
  • R-Value Work: 0.178 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Structure-activity relationships of flurbiprofen analogues as stabilizers of the amyloidogenic protein transthyretin.

Loconte, V.Menozzi, I.Ferrari, A.Folli, C.Imbimbo, B.P.Zanotti, G.Berni, R.

(2019) J.Struct.Biol. 208: 165-173

  • DOI: 10.1016/j.jsb.2019.08.011
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • The inherent amyloidogenic potentialof wild type transthyretin (TTR) is enhanced by a large number of point mutations, which destabilize the TTR tetramer, thereby promoting its disassembly and pathological aggregation responsible for TTR-related amyl ...

    The inherent amyloidogenic potentialof wild type transthyretin (TTR) is enhanced by a large number of point mutations, which destabilize the TTR tetramer, thereby promoting its disassembly and pathological aggregation responsible for TTR-related amyloidosis. TTR stabilizers are able to interact with the thyroxine-binding sites of TTR, stabilizing its tetrameric native state and inhibiting amyloidogenesis. Herein, we report on in vitro, ex vivo, and X-ray analyses to assess the TTR structural stabilization by analogues of flurbiprofen, a non-steroidal anti-inflammatory drug (NSAID). Overall, considering together binding selectivity and protective effects on TTR native structure by flurbiprofen analogues in the presence of plasma proteins, as determined by Western Blot,the aforementioned properties of analyzed compounds appear to be better (CHF5075 and CHF4802) or similar (CHF4795) or worse (CHF5074, also known as CSP-1103) as compared to those of diflunisal, used as a reference TTR stabilizer. Molecular details of the determinants affecting the interactionsof CHF5075, CHF4802, and CHF4795 with wild type TTRand of CHF5074 withtheamyloidogenic A25TTTR variant havebeen elucidated by X-ray analysis. Distinct interactions with TTR appear to characterize flurbiprofen analogues and the NSAID diflunisal and its analogues as TTR stabilizers. Relationships between stabilizing effect on TTR by flurbiprofen analogues determined experimentally and molecular details of their interactions with TTR have been established, providing the rationale for their protective effects on the native protein structure.


    Organizational Affiliation

    Department of Chemistry, Life Sciences and Environmental Sustainability, University of Parma, 43124 Parma, Italy. Electronic address: rodolfo.berni@unipr.it.,Department of Chemistry, Life Sciences and Environmental Sustainability, University of Parma, 43124 Parma, Italy.,Department of Biomedical Sciences, University of Padua, 35131 Padua, Italy.,Department of Biomedical Sciences, University of Padua, 35131 Padua, Italy. Electronic address: giuseppe.zanotti@unipd.it.,Research and Development, Chiesi Farmaceutici, 43122 Parma, Italy.,Department of Food and Drug, University of Parma, 43124 Parma, Italy.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Transthyretin
A, B
147Homo sapiensMutation(s): 0 
Gene Names: TTR (PALB)
Find proteins for P02766 (Homo sapiens)
Go to Gene View: TTR
Go to UniProtKB:  P02766
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
JTK
Query on JTK

Download SDF File 
Download CCD File 
A, B
(2~{R})-2-[4-[3,5-bis(chloranyl)phenyl]-3-fluoranyl-phenyl]propanoic acid
C15 H11 Cl2 F O2
WFTMOACTNNIYQO-MRVPVSSYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.45 Å
  • R-Value Free: 0.198 
  • R-Value Work: 0.178 
  • Space Group: P 21 21 2
Unit Cell:
Length (Å)Angle (°)
a = 42.582α = 90.00
b = 85.072β = 90.00
c = 64.947γ = 90.00
Software Package:
Software NamePurpose
REFMACrefinement
PHASERphasing
SCALAdata scaling
XDSdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2019-09-11
    Type: Initial release
  • Version 1.1: 2019-11-06
    Type: Data collection, Database references