5TTR

LEU 55 PRO TRANSTHYRETIN CRYSTAL STRUCTURE


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.7 Å
  • R-Value Work: 0.199 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

The crystal structure of amyloidogenic Leu55 --> Pro transthyretin variant reveals a possible pathway for transthyretin polymerization into amyloid fibrils.

Sebastiao, M.P.Saraiva, M.J.Damas, A.M.

(1998) J.Biol.Chem. 273: 24715-24722


  • PubMed Abstract: 
  • The x-ray crystal structure of the amyloidogenic Leu55 --> Pro transthyretin (TTR) variant, implicated as the causative agent in early-onset familial amyloidotic polyneuropathy (Jacobson, D. R., McFarlin, D. E., Kane, I., and Buxbaum, J. N. (1992) Hu ...

    The x-ray crystal structure of the amyloidogenic Leu55 --> Pro transthyretin (TTR) variant, implicated as the causative agent in early-onset familial amyloidotic polyneuropathy (Jacobson, D. R., McFarlin, D. E., Kane, I., and Buxbaum, J. N. (1992) Hum. Genet. 89, 353-356), has been solved by molecular replacement, refined at 2.7 A to a Rcryst value of 0.190 (Fobs > 2.0sigma), and compared with wild-type transthyretin to understand the molecular mechanism(s) involved in amyloidogenesis. Leu55 --> Pro TTR crystallizes in space group C2, with eight monomers in the asymmetric unit, and the observed packing contacts are considerably different from those described for the wild-type protein. Refinement of the crystal structure shows that the proline for leucine substitution disrupts the hydrogen bonds between strands D and A, resulting in different interface contacts. Based on the assumption that the observed packing contacts may be significant for amyloidogenesis, a model for the TTR amyloid is proposed. It consists of a tubular structure with inner and outer diameters approximately of 30 and 100 A and four monomers per cross-section.


    Related Citations: 
    • Crystallization and Preliminary X-Ray Diffraction Studies of Leu55Pro Variant Transthyretin
      Sebastiao, P.,Dauter, Z.,Saraiva, M.J.,Damas, A.M.
      (1996) Acta Crystallogr.,Sect.D 52: 566
    • Transthyretin Mutation Leu-55-Pro Significantly Alters Tetramer Stability and Increases Amyloidogenicity
      Mccutchen, S.L.,Colon, W.,Kelly, J.W.
      (1993) Biochemistry 32: 12119
    • Transthyretin Pro55, a Variant Associated with Early-Onset, Aggressive, Diffuse Amyloidosis with Cardiac and Neurologic Involvement
      Jacobson, D.R.,Mcfarlin, D.E.,Kane, I.,Buxbaum, J.N.
      (1992) Hum.Genet. 89: 353


    Organizational Affiliation

    Instituto de Biologia Molecular e Celular, Rua do Campo Alegre, no. 823, 4150 Porto, Portugal.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
TRANSTHYRETIN
A, B, C, D, E, F, G, H
127Homo sapiensGene Names: TTR (PALB)
Find proteins for P02766 (Homo sapiens)
Go to Gene View: TTR
Go to UniProtKB:  P02766
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.7 Å
  • R-Value Work: 0.199 
  • Space Group: C 1 2 1
Unit Cell:
Length (Å)Angle (°)
a = 149.990α = 90.00
b = 78.740β = 100.50
c = 98.950γ = 90.00
Software Package:
Software NamePurpose
SCALEPACKdata scaling
PROLSQrefinement
DENZOdata reduction
AMoREphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1999-06-01
    Type: Initial release
  • Version 1.1: 2008-03-25
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance