3NEO

Wild type human transthyretin (TTR) complexed with GC-24 (TTRwt:GC-24)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.00 Å
  • R-Value Free: 0.220 
  • R-Value Work: 0.183 
  • R-Value Observed: 0.185 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

The binding of synthetic triiodo l-thyronine analogs to human transthyretin: molecular basis of cooperative and non-cooperative ligand recognition.

Trivella, D.B.Sairre, M.I.Foguel, D.Lima, L.M.Polikarpov, I.

(2011) J Struct Biol 173: 323-332

  • DOI: 10.1016/j.jsb.2010.10.003
  • Structures With Same Primary Citation

  • PubMed Abstract: 
  • Transthyretin (TTR) is a tetrameric β-sheet-rich transporter protein directly involved in human amyloid diseases. Several classes of small molecules can bind to TTR delaying its amyloid fibril formation, thus being promising drug candidates to treat ...

    Transthyretin (TTR) is a tetrameric β-sheet-rich transporter protein directly involved in human amyloid diseases. Several classes of small molecules can bind to TTR delaying its amyloid fibril formation, thus being promising drug candidates to treat TTR amyloidoses. In the present study, we characterized the interactions of the synthetic triiodo L-thyronine analogs and thyroid hormone nuclear receptor TRβ-selective agonists GC-1 and GC-24 with the wild type and V30M variant of human transthyretin (TTR). To achieve this aim, we conducted in vitro TTR acid-mediated aggregation and isothermal titration calorimetry experiments and determined the TTR:GC-1 and TTR:GC-24 crystal structures. Our data indicate that both GC-1 and GC-24 bind to TTR in a non-cooperative manner and are good inhibitors of TTR aggregation, with dissociation constants for both hormone binding sites (HBS) in the low micromolar range. Analysis of the crystal structures of TTRwt:GC-1(24) complexes and their comparison with the TTRwt X-ray structure bound to its natural ligand thyroxine (T4) suggests, at the molecular level, the basis for the cooperative process displayed by T4 and the non-cooperative process provoked by both GC-1 and GC-24 during binding to TTR.


    Related Citations: 
    • Conformational differences between the wild type and V30M mutant transthyretin modulate its binding to genistein: implications to tetramer stability and ligand-binding.
      Bleicher, L., Montanari, C.A., Foguel, D., Trivella, D.B., Wiggers, H.J., Lima, L.M.
      (2010) J Struct Biol 170: 522

    Organizational Affiliation

    Instituto de Física de São Carlos-Universidade de São Paulo, São Carlos, SP, Brazil.



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Transthyretin
A, B
116Homo sapiensMutation(s): 0 
Gene Names: PALBTTR
Find proteins for P02766 (Homo sapiens)
Go to UniProtKB:  P02766
NIH Common Fund Data Resources
PHAROS  P02766
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
G24
Query on G24

Download CCD File 
A, B
[4-(3-BENZYL-4-HYDROXYBENZYL)-3,5-DIMETHYLPHENOXY]ACETIC ACID
C24 H24 O4
JYHIGYLGYNCMGI-UHFFFAOYSA-N
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
G24Kd:  1200   nM  PDBBind
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.00 Å
  • R-Value Free: 0.220 
  • R-Value Work: 0.183 
  • R-Value Observed: 0.185 
  • Space Group: P 21 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 42.77α = 90
b = 84.91β = 90
c = 64.44γ = 90
Software Package:
Software NamePurpose
SCALAdata scaling
PHASERphasing
REFMACrefinement
PDB_EXTRACTdata extraction
MAR345dtbdata collection
MOSFLMdata reduction

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2010-11-24
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance