5A6I

V122I Transthyretin structure in complex with Tolcalpone


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.86 Å
  • R-Value Free: 0.271 
  • R-Value Work: 0.197 
  • R-Value Observed: 0.201 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Repositioning Tolcapone as a Potent Inhibitor of Transthyretin Amyloidogenesis and its Associated Cellular Toxicity

Reverter, D.Gallego, P.Santana, R.Ventura, S.

(2016) Nat Commun 7: 10787

  • DOI: 10.1038/ncomms10787
  • Structures With Same Primary Citation

  • PubMed Abstract: 
  • Transthyretin (TTR) is a plasma homotetrameric protein implicated in fatal systemic amyloidoses. TTR tetramer dissociation precedes pathological TTR aggregation. Native state stabilizers are promising drugs to treat TTR amyloidoses. Here we repurpose ...

    Transthyretin (TTR) is a plasma homotetrameric protein implicated in fatal systemic amyloidoses. TTR tetramer dissociation precedes pathological TTR aggregation. Native state stabilizers are promising drugs to treat TTR amyloidoses. Here we repurpose tolcapone, an FDA-approved molecule for Parkinson's disease, as a potent TTR aggregation inhibitor. Tolcapone binds specifically to TTR in human plasma, stabilizes the native tetramer in vivo in mice and humans and inhibits TTR cytotoxicity. Crystal structures of tolcapone bound to wild-type TTR and to the V122I cardiomyopathy-associated variant show that it docks better into the TTR T4 pocket than tafamidis, so far the only drug on the market to treat TTR amyloidoses. These data indicate that tolcapone, already in clinical trials for familial amyloid polyneuropathy, is a strong candidate for therapeutic intervention in these diseases, including those affecting the central nervous system, for which no small-molecule therapy exists.


    Organizational Affiliation

    Institut de Biotecnologia i Biomedicina and Departament de Bioquímica i Biologia Molecular, Universitat Autònoma de Barcelona, Bellaterra, Barcelona 08193, Spain.



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
TRANSTHYRETINA128Homo sapiensMutation(s): 1 
Gene Names: TTRPALB
Find proteins for P02766 (Homo sapiens)
Explore P02766 
Go to UniProtKB:  P02766
NIH Common Fund Data Resources
PHAROS  P02766
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
TCW
Query on TCW

Download CCD File 
A
Tolcapone
C14 H11 N O5
MIQPIUSUKVNLNT-UHFFFAOYSA-N
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
TCWKd:  56   nM  Binding MOAD
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.86 Å
  • R-Value Free: 0.271 
  • R-Value Work: 0.197 
  • R-Value Observed: 0.201 
  • Space Group: I 2 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 42.484α = 90
b = 62.547β = 90
c = 84.684γ = 90
Software Package:
Software NamePurpose
REFMACrefinement

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2016-02-24
    Type: Initial release
  • Version 1.1: 2016-03-02
    Changes: Database references
  • Version 1.2: 2017-08-23
    Changes: Data collection