1ETB

THE X-RAY CRYSTAL STRUCTURE REFINEMENTS OF NORMAL HUMAN TRANSTHYRETIN AND THE AMYLOIDOGENIC VAL 30-->MET VARIANT TO 1.7 ANGSTROMS RESOLUTION


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.7 Å

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

The x-ray crystal structure refinements of normal human transthyretin and the amyloidogenic Val-30-->Met variant to 1.7-A resolution.

Hamilton, J.A.Steinrauf, L.K.Braden, B.C.Liepnieks, J.Benson, M.D.Holmgren, G.Sandgren, O.Steen, L.

(1993) J.Biol.Chem. 268: 2416-2424

  • Primary Citation of Related Structures:  1ETA, 1TTA, 1TTB, 1TTC

  • PubMed Abstract: 
  • The x-ray crystal structures of normal human transthyretin (prealbumin) and the amyloidogenic Val-30-Met variant have been refined at 1.7-A resolution to R-values of 0.168 and 0.179, respectively, for 19,882 and 20,362 reflections (Fobs > 2.0 sigma). ...

    The x-ray crystal structures of normal human transthyretin (prealbumin) and the amyloidogenic Val-30-Met variant have been refined at 1.7-A resolution to R-values of 0.168 and 0.179, respectively, for 19,882 and 20,362 reflections (Fobs > 2.0 sigma). Standard deviations for stereochemical parameters are 0.018 and 0.022 A for bond distances, 0.030 and 0.038 A for angle distances, and 0.035 and 0.070 A for planar 1-4 distances. The newly refined normal structure shows improvement over the original structure of Blake and Swan (Blake, C. C. F., and Swan, I. D. A. (1971) J. Mol. Biol. 61, 217-224) in stereochemistry and in the conformation of the loop regions. Residues Arg-103, Thr-123, Asn-124, and Pro-125 have now been resolved, and residues 1-9 and 126-127 have been modeled with the aid of simulated annealing refinement. The functional form of transthyretin is a tetramer, having a cylindrical cavity which will bind thyroxine and an exterior binding site for the complex of retinol with retinol-binding protein. The monomer is a beta barrel flattened to become more like a sandwich with residue 30 in the interior. The methionyl for valyl substitution forces the beta sheets of the monomer as much as 1 A apart, resulting in a distortion of the thyroxine-binding cavity, in agreement with the independent observations that the Met-30 variant has low affinity for thyroxine.


    Related Citations: 
    • X-Ray Crystal Structure of the Ala 109(Right Arrow)Thr Variant of Human Transthyretin which Produces Euthyroid Hyperthyroxinemia
      Steinrauf, L.K.,Hamilton, J.A.,Braden, B.C.,Murrell, J.R.,Benson, M.D.
      (1993) J.Biol.Chem. 268: 2425
    • Alteration in Molecular Structure which Results in Disease: The met 30 Variant of Human Plasma Transthyretin
      Hamilton, J.A.,Steinrauf, L.K.,Liepnieks, J.J.,Benson, M.D.,Holmgren, G.,Sandgren, O.,Steen, L.
      (1992) Biochim.Biophys.Acta 139: 9


    Organizational Affiliation

    Department of Biochemistry and Molecular Biology, Indiana University School of Medicine, Indianapolis 46202-5122.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
TRANSTHYRETIN
1, 2
127Homo sapiensGene Names: TTR (PALB)
Find proteins for P02766 (Homo sapiens)
Go to Gene View: TTR
Go to UniProtKB:  P02766
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
T44
Query on T44

Download SDF File 
Download CCD File 
1, 2
3,5,3',5'-TETRAIODO-L-THYRONINE
C15 H11 I4 N O4
XUIIKFGFIJCVMT-LBPRGKRZSA-N
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
T44IC50: 10500 nM (99) BINDINGDB
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.7 Å
  • Space Group: P 21 21 2
Unit Cell:
Length (Å)Angle (°)
a = 43.720α = 90.00
b = 86.090β = 90.00
c = 65.790γ = 90.00
Software Package:
Software NamePurpose
PROLSQrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1995-01-26
    Type: Initial release
  • Version 1.1: 2008-03-03
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance
  • Version 1.3: 2017-11-29
    Type: Derived calculations, Other