Biological Assembly 1  

 3D View: Structure | Electron Density

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Global Symmetry: Dihedral - D2  (3D View)
Global Stoichiometry: Homo 4-mer - A4 

Biological assembly 1 assigned by authors and generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 27522.63 
• Atom Count: 1894 
• Residue Count: 254 
• Unique protein chains: 1

3DJZ

Crystal structure of transthyretin variant L55P at neutral pH

• DOI: 10.2210/pdb3DJZ/pdb

• Classification: TRANSPORT PROTEIN
• Organism(s): Homo sapiens
• Expression System: Escherichia coli
• Mutation(s): 1 


• Deposited: 2008-06-24 Released: 2009-07-14 
• Deposition Author(s): Cendron, L., Zanotti, G., Folli, C., Berni, R.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.82 Å
• R-Value Free: 0.219 
• R-Value Work: 0.196 

Literature

Amyloidogenic potential of transthyretin variants: insights from structural and computational analyses.

Cendron, L., Trovato, A., Seno, F., Folli, C., Alfieri, B., Zanotti, G., Berni, R.

(2009) J.Biol.Chem. 284: 25832-25841

• PubMed: 19602727 
• DOI: 10.1074/jbc.M109.017657
• Primary Citation of Related Structures:  
  3DK2, 3DK0, 3DJT, 3DJS, 3DJR
• Also Cited By: 4I89, 4I87, 4I85


• PubMed Abstract: 
  

Human transthyretin (TTR) is an amyloidogenic protein whose mild amyloidogenicity is enhanced by many point mutations affecting considerably the amyloid disease phenotype. To ascertain whether the high amyloidogenic potential of TTR variants may be explained on the basis of the conformational change hypothesis, an aim of this work was to determine structural alterations for five amyloidogenic TTR variants crystallized under native and/or destabilizing (moderately acidic pH) conditions. While at acidic pH structural changes may be more significant because of a higher local protein flexibility, only limited alterations, possibly representing early events associated with protein destabilization, are generally induced by mutations. This study was also aimed at establishing to what extent wild-type TTR and its amyloidogenic variants are intrinsically prone to beta-aggregation. We report the results of a computational analysis predicting that wild-type TTR possesses a very high intrinsic beta-aggregation propensity which is on average not enhanced by amyloidogenic mutations. However, when located in beta-strands, most of these mutations are predicted to destabilize the native beta-structure. The analysis also shows that rat and murine TTR have a lower intrinsic beta-aggregation propensity and a similar native beta-structure stability compared with human TTR. This result is consistent with the lack of in vitro amyloidogenicity found for both murine and rat TTR. Collectively, the results of this study support the notion that the high amyloidogenic potential of human pathogenic TTR variants is determined by the destabilization of their native structures, rather than by a higher intrinsic beta-aggregation propensity.

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Related Citations: 

• A Comparative Analysis of 23 Structures of the Amyloidogenic Protein Transthyretin.
  Eneqvist, T.,Olofsson, A.,Lundgren, E.,Sauer-Eriksson, A.E.
  (2000) J.Mol.Biol. 302: 649
• Acidic Ph-Induced Conformational Changes in Amyloidogenic Mutant Transthyretin.
  Pasquato, N.,Berni, R.,Folli, C.,Alfieri, B.,Cendron, L.,Zanotti, G.
  (2007) J.Mol.Biol. 366: 711




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Organizational Affiliation: 

Department of Biological Chemistry, University of Padua, and Istituto di Chimica Biomolecolare, Section of Padua, Viale G. Colombo 3, 35121 Padua, Italy.

Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
Transthyretin	A, B	127	Homo sapiens	Mutation(s): 1  Gene 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: 1.82 Å
• R-Value Free: 0.219 
• R-Value Work: 0.196 
• Space Group: P 2₁ 2₁ 2

Unit Cell:

Length (Å)	Angle (°)
a = 42.729	α = 90.00
b = 83.628	β = 90.00
c = 66.598	γ = 90.00

Software Package:

Software Name	Purpose
REFMAC	refinement
SCALA	data scaling
ADSC	data collection
PHASER	phasing
MOSFLM	data reduction

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2008-06-24 
• Released Date: 2009-07-14 
• Deposition Author(s): Cendron, L., Zanotti, G., Folli, C., Berni, R.

Revision History 

• Version 1.0: 2009-07-14
  Type: Initial release
• Version 1.1: 2011-07-13
  Type: Version format compliance
• Version 1.2: 2014-03-05
  Type: Database references