1F86

TRANSTHYRETIN THR119MET PROTEIN STABILISATION


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.10 Å
  • R-Value Free: 0.177 
  • R-Value Work: 0.147 
  • R-Value Observed: 0.140 

wwPDB Validation   3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

Transthyretin stability as a key factor in amyloidogenesis: X-ray analysis at atomic resolution.

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

(2001) J Mol Biol 306: 733-744

  • DOI: 10.1006/jmbi.2000.4415
  • Primary Citation of Related Structures:  
    1F86, 1FH2, 1FHN

  • PubMed Abstract: 
  • Transthyretin (TTR) amyloidosis is a conformational disturbance, which, like other amyloidoses, represents a life threat. Here, we report a TTR variant, TTR Thr119Met, that has been shown to have a protective role in the development of clinical symptoms in carriers of TTR Val30Met, one of the most frequent variants among TTR amyloidosis patients ...

    Transthyretin (TTR) amyloidosis is a conformational disturbance, which, like other amyloidoses, represents a life threat. Here, we report a TTR variant, TTR Thr119Met, that has been shown to have a protective role in the development of clinical symptoms in carriers of TTR Val30Met, one of the most frequent variants among TTR amyloidosis patients. In order to understand this effect, we have determined the structures of the TTR Val30Met/Thr119Met double mutant isolated from the serum of one patient and of both the native and thyroxine complex of TTR Thr119Met. Major conclusions are: (i) new H-bonds within each monomer and monomer-monomer inter-subunit contacts, e.g. Ser117-Ser117 and Met119-Tyr114, increase protein stability, possibly leading to the protective effect of the TTR Val30Met/Thr119Met variant when compared to the single variant TTR Val30Met. (ii) The mutated residue (Met119) extends across the thyroxine binding channel inducing conformational changes that lead to closer contacts between different dimers within the tetramer. The data, at atomic resolution, were essential to detect, for the first time, the subtle changes in the inter-subunit contacts of TTR, and explain the non-amyloidogenic potential of the TTR Thr119Met variant, improving considerably current research on the TTR amyloid fibril formation pathway.


    Organizational Affiliation

    Unidade de Estrutura Molecular and



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
TRANSTHYRETIN THR119MET VARIANTA, B115Homo sapiensMutation(s): 1 
Gene Names: TTRPALB
UniProt & NIH Common Fund Data Resources
Find proteins for P02766 (Homo sapiens)
Explore P02766 
Go to UniProtKB:  P02766
PHAROS:  P02766
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP02766
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
T44
Query on T44

Download Ideal Coordinates CCD File 
C [auth A],
D [auth B]
3,5,3',5'-TETRAIODO-L-THYRONINE
C15 H11 I4 N O4
XUIIKFGFIJCVMT-LBPRGKRZSA-N
 Ligand Interaction
Binding Affinity Annotations 
IDSourceBinding Affinity
T44 BindingDB:  1F86 IC50: min: 2188, max: 1.05e+4 (nM) from 3 assay(s)
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.10 Å
  • R-Value Free: 0.177 
  • R-Value Work: 0.147 
  • R-Value Observed: 0.140 
  • Space Group: P 21 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 42.68α = 90
b = 85.77β = 90
c = 63.69γ = 90
Software Package:
Software NamePurpose
X-PLORmodel building
SHELXL-97refinement
DENZOdata reduction
SCALEPACKdata scaling
X-PLORphasing

Structure Validation

View Full Validation Report




Entry History 

Deposition Data

  • Deposited Date: 2000-06-29 
  • Released Date: 2001-06-29 
  • Deposition Author(s): Sebastiao, M.P.

Revision History  (Full details and data files)

  • Version 1.0: 2001-06-29
    Type: Initial release
  • Version 1.1: 2008-04-27
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2021-11-03
    Changes: Data collection, Database references, Derived calculations