Human Transthyretin (TTR) complexed with 2-((3,5-dichloro-4-hydroxyphenyl)amino)benzoic acid

Experimental Data Snapshot

  • Resolution: 1.20 Å
  • R-Value Free: 0.171 
  • R-Value Work: 0.143 

wwPDB Validation   3D Report Full Report

This is version 1.3 of the entry. See complete history


Trapping of palindromic ligands within native transthyretin prevents amyloid formation.

Kolstoe, S.E.Mangione, P.P.Bellotti, V.Taylor, G.W.Tennent, G.A.Deroo, S.Morrison, A.J.Cobb, A.J.Coyne, A.McCammon, M.G.Warner, T.D.Mitchell, J.Gill, R.Smith, M.D.Ley, S.V.Robinson, C.V.Wood, S.P.Pepys, M.B.

(2010) Proc Natl Acad Sci U S A 107: 20483-20488

  • DOI: https://doi.org/10.1073/pnas.1008255107
  • Primary Citation of Related Structures:  
    3IPB, 3IPE, 3M1O

  • PubMed Abstract: 

    Transthyretin (TTR) amyloidosis is a fatal disease for which new therapeutic approaches are urgently needed. We have designed two palindromic ligands, 2,2'-(4,4'-(heptane-1,7-diylbis(oxy))bis(3,5-dichloro-4,1-phenylene)) bis(azanediyl)dibenzoic acid (mds84) and 2,2'-(4,4'-(undecane-1,11-diylbis(oxy))bis(3,5-dichloro-4,1-phenylene)) bis(azanediyl)dibenzoic acid (4ajm15), that are rapidly bound by native wild-type TTR in whole serum and even more avidly by amyloidogenic TTR variants. One to one stoichiometry, demonstrable in solution and by MS, was confirmed by X-ray crystallographic analysis showing simultaneous occupation of both T4 binding sites in each tetrameric TTR molecule by the pair of ligand head groups. Ligand binding by native TTR was irreversible under physiological conditions, and it stabilized the tetrameric assembly and inhibited amyloidogenic aggregation more potently than other known ligands. These superstabilizers are orally bioavailable and exhibit low inhibitory activity against cyclooxygenase (COX). They offer a promising platform for development of drugs to treat and prevent TTR amyloidosis.

  • Organizational Affiliation

    Centre for Amyloidosis and Acute Phase Proteins, Division of Medicine, Royal Free Campus, University College London Medical School, London NW3 2PF, United Kingdom.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
A, B
127Homo sapiensMutation(s): 0 
Gene Names: TTRPALB
UniProt & NIH Common Fund Data Resources
Find proteins for P02766 (Homo sapiens)
Explore P02766 
Go to UniProtKB:  P02766
PHAROS:  P02766
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP02766
Sequence Annotations
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
Query on CJZ

Download Ideal Coordinates CCD File 
C [auth A],
D [auth B]
2-[(3,5-dichloro-4-hydroxyphenyl)amino]benzoic acid
C13 H9 Cl2 N O3
Experimental Data & Validation

Experimental Data

  • Resolution: 1.20 Å
  • R-Value Free: 0.171 
  • R-Value Work: 0.143 
  • Space Group: P 21 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 42.525α = 90
b = 85.39β = 90
c = 63.625γ = 90
Software Package:
Software NamePurpose
DNAdata collection
MOSFLMdata reduction
SCALAdata scaling

Structure Validation

View Full Validation Report

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2010-11-17
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance
  • Version 1.2: 2017-11-08
    Changes: Refinement description
  • Version 1.3: 2023-09-06
    Changes: Data collection, Database references, Derived calculations, Refinement description