1E3F

Structure of human transthyretin complexed with bromophenols: a new mode of binding


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.90 Å
  • R-Value Free: 0.252 
  • R-Value Work: 0.193 
  • R-Value Observed: 0.193 

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This is version 1.3 of the entry. See complete history


Literature

Structure of Human Transthyretin Complexed with Bromophenols : A New Mode of Binding

Ghosh, M.Meerts, I.A.T.M.Cook, A.Bergman, A.Brouwer, A.Johnson, L.N.

(2000) Acta Crystallogr D Biol Crystallogr 56: 1085

  • DOI: 10.1107/s0907444900008568
  • Primary Citation of Related Structures:  
    1E3F, 1E4H, 1E5A

  • PubMed Abstract: 
  • The binding of two organohalogen substances, pentabromophenol (PBP) and 2,4,6-tribromophenol (TBP), to human transthyretin (TTR), a thyroid hormone transport protein, has been studied by in vitro competitive binding assays and by X-ray crystallography. Both compounds bind to TTR with high affinity, in competition with the natural ligand thyroxine (T(4)) ...

    The binding of two organohalogen substances, pentabromophenol (PBP) and 2,4,6-tribromophenol (TBP), to human transthyretin (TTR), a thyroid hormone transport protein, has been studied by in vitro competitive binding assays and by X-ray crystallography. Both compounds bind to TTR with high affinity, in competition with the natural ligand thyroxine (T(4)). The crystal structures of the TTR-PBP and TTR-TBP complexes show some unusual binding patterns for the ligands. They bind exclusively in the 'reversed' mode, with their hydroxyl group pointing towards the mouth of the binding channel and in planes approximately perpendicular to that adopted by the T(4) phenolic ring in a TTR-T(4) complex, a feature not observed before. The hydroxyl group in the ligands, which was previously thought to be a key ingredient for a strong binding to TTR, does not seem to play an important role in the binding of these compounds to TTR. In the TTR-PBP complex, it is primarily the halogens which interact with the TTR molecule and therefore must account for the strong affinity of binding. The interactions with the halogens are smaller in number in TTR-TBP and there is a decrease in affinity, even though the interaction with the hydroxyl group is stronger than that in the TTR-PBP complex.


    Related Citations: 
    • Multiple Modes of Binding of Thyroid Hormones and Other Iodothyronines to Human Plasma Transthyretin
      De La Paz, P., Burridge, J.M., Oatley, S.J., Blake, C.C.F.
      (1992) The Design Of Drugs To Macromolecular Targets --: 119
    • Structure of Prealbumin.Secondary,Tertiary and Quaternary Interactions Determined by Fourier Refinemrnt and Thyroxine Binding
      Blake, C.C.F., Geisow, M.J., Oatley, S.J., Rerat, C., Rerat, B.
      (1978) J Mol Biol 88: 339
    • Protein-DNA and Protein-Hormone Interactions in Prealbumin : A Model of the Thyroid Hormone Nuclear Receptor
      Blake, C.C.F., Oatley, S.J.
      (1977) Nature 268: 115

    Organizational Affiliation

    Laboratory of Molecular Biophysics, Department of Biochemistry, South Parks Road, Oxford OX1 3QU, England. mina@biop.ox.ac.uk



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
TRANSTHYRETINA, B127Homo 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
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.90 Å
  • R-Value Free: 0.252 
  • R-Value Work: 0.193 
  • R-Value Observed: 0.193 
  • Space Group: P 21 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 42.7α = 90
b = 85.4β = 90
c = 64.2γ = 90
Software Package:
Software NamePurpose
X-PLORrefinement
DENZOdata reduction
SCALEPACKdata scaling
X-PLORphasing

Structure Validation

View Full Validation Report




Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2000-08-29
    Type: Initial release
  • Version 1.1: 2011-05-08
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2017-07-05
    Changes: Data collection