2B16

The crystal structure of 2,4-dinitrophenol in complex with the amyloidogenic variant Transthyretin Tyr78Phe


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.75 Å
  • R-Value Free: 0.236 
  • R-Value Work: 0.190 
  • R-Value Observed: 0.191 

Starting Model: experimental
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This is version 1.4 of the entry. See complete history


Literature

The binding of 2,4-dinitrophenol to wild-type and amyloidogenic transthyretin

Morais-de-Sa, E.Neto-Silva, R.M.Pereira, P.J.Saraiva, M.J.Damas, A.M.

(2006) Acta Crystallogr D Biol Crystallogr 62: 512-519

  • DOI: https://doi.org/10.1107/S0907444906006962
  • Primary Citation of Related Structures:  
    2B14, 2B15, 2B16

  • PubMed Abstract: 

    Systemic deposition of transthyretin (TTR) amyloid fibrils is always observed in familial amyloidotic polyneuropathy, senile systemic amyloidosis and familial amyloidotic cardiomyopathy patients. Destabilization of the molecule leads to a cascade of events which result in fibril formation. The destabilization of a native protein with consequent conformational changes appears to be a common link in several human amyloid diseases. Intensive research has been directed towards finding small molecules that could work as therapeutic agents for the prevention/inhibition of amyloid diseases through stabilization of the native fold of the potentially amyloidogenic protein. This work provides insight into the structural determinants of the highly stabilizing effects of 2,4-dinitrophenol on wild-type TTR. It is also shown that similar interactions are established between this molecule and two highly amyloidogenic TTR variants: TTR L55P and TTR Y78F. In the three crystal complexes, 2,4-dinitrophenol occupies the two hormone-binding sites of the TTR tetramer. As a result of 2,4-dinitrophenol binding, the two dimers in the TTR tetramer become closer, increasing the stability of the protein. The three-dimensional structures now determined allow a comprehensive description of key interactions between transthyretin and 2,4-dinitrophenol, a small compound that holds promise as a template for the design of a therapeutical drug for amyloid diseases.


  • Organizational Affiliation

    Instituto de Biologia Molecular e Celular-IBMC, Rua do Campo Alegre 823, 4150-180 Porto, Portugal.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Transthyretin
A, B
127Homo sapiensMutation(s): 1 
UniProt & NIH Common Fund Data Resources
Find proteins for P02766 (Homo sapiens)
Explore P02766 
Go to UniProtKB:  P02766
PHAROS:  P02766
GTEx:  ENSG00000118271 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP02766
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.75 Å
  • R-Value Free: 0.236 
  • R-Value Work: 0.190 
  • R-Value Observed: 0.191 
  • Space Group: P 21 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 42.542α = 90
b = 85.869β = 90
c = 63.603γ = 90
Software Package:
Software NamePurpose
MOSFLMdata reduction
SCALAdata scaling
AMoREphasing
ARP/wARPmodel building
CCP4data scaling

Structure Validation

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Ligand Structure Quality Assessment 


Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2006-07-18
    Type: Initial release
  • Version 1.1: 2008-05-01
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Derived calculations, Version format compliance
  • Version 1.3: 2021-11-10
    Changes: Database references, Derived calculations
  • Version 1.4: 2023-10-25
    Changes: Data collection, Refinement description