Biological Assembly 1  

 3D View: Structure | Electron Density | Ligand Interaction

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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: 26359.39 
• Atom Count: 1834 
• Residue Count: 232 
• Unique protein chains: 1

5CR1

Crystal structure of TTR/resveratrol/T4 complex

• DOI: 10.2210/pdb5CR1/pdb

• Classification: TRANSPORT PROTEIN
• Organism(s): Homo sapiens
• Expression System: Escherichia coli BL21(DE3)


• Deposited: 2015-07-22 Released: 2015-10-21 
• Deposition Author(s): Zanotti, G., Florio, P., Folli, C., Cianci, M., Del Rio, D., Berni, R.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.545 Å
• R-Value Free: 0.193 
• R-Value Work: 0.166 

Literature

Transthyretin Binding Heterogeneity and Anti-amyloidogenic Activity of Natural Polyphenols and Their Metabolites.

Florio, P., Folli, C., Cianci, M., Del Rio, D., Zanotti, G., Berni, R.

(2015) J.Biol.Chem. 290: 29769-29780

• PubMed: 26468275 
• DOI: 10.1074/jbc.M115.690172
• Primary Citation of Related Structures:  
  5AL8, 5AKV, 5AKT, 5AKS, 5AL0


• PubMed Abstract: 
  

Transthyretin (TTR) is an amyloidogenic protein, the amyloidogenic potential of which is enhanced by a number of specific point mutations. The ability to inhibit TTR fibrillogenesis is known for several classes of compounds, including natural polyphenols, which protect the native state of TTR by specifically interacting with its thyroxine binding sites. Comparative analyses of the interaction and of the ability to protect the TTR native state for polyphenols, both stilbenoids and flavonoids, and some of their main metabolites have been carried out. A main finding of this investigation was the highly preferential binding of resveratrol and thyroxine, both characterized by negative binding cooperativity, to distinct sites in TTR, consistent with the data of x-ray analysis of TTR in complex with both ligands. Although revealing the ability of the two thyroxine binding sites of TTR to discriminate between different ligands, this feature has allowed us to evaluate the interactions of polyphenols with both resveratrol and thyroxine preferential binding sites, by using resveratrol and radiolabeled T4 as probes. Among flavonoids, genistein and apigenin were able to effectively displace resveratrol from its preferential binding site, whereas genistein also showed the ability to interact, albeit weakly, with the preferential thyroxine binding site. Several glucuronidated polyphenol metabolites did not exhibit significant competition for resveratrol and thyroxine preferential binding sites and lacked the ability to stabilize TTR. However, resveratrol-3-O-sulfate was able to significantly protect the protein native state. A rationale for the in vitro properties found for polyphenol metabolites was provided by x-ray analysis of their complexes with TTR.

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Organizational Affiliation: 

From the Department of Life Sciences, University of Parma, 43124 Parma, Italy.

Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
Transthyretin	A, B	116	Homo sapiens	Mutation(s): 0  Gene Names: TTR (PALB)
Find proteins for P02766 (Homo sapiens) Go to Gene View: TTR Go to UniProtKB:  P02766

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram & Interactions
STL	B	RESVERATROL C14 H12 O3 LUKBXSAWLPMMSZ-OWOJBTEDSA-N
T44	A	3,5,3',5'-TETRAIODO-L-THYRONINE C15 H11 I4 N O4 XUIIKFGFIJCVMT-LBPRGKRZSA-N

External Ligand Annotations
ID	Binding Affinity (Sequence Identity %)
T44	IC50: 10500 nM (99) BINDINGDB

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.545 Å
• R-Value Free: 0.193 
• R-Value Work: 0.166 
• Space Group: P 2₁ 2₁ 2

Unit Cell:

Length (Å)	Angle (°)
a = 42.536	α = 90.00
b = 85.633	β = 90.00
c = 63.826	γ = 90.00

Software Package:

Software Name	Purpose
PHENIX	refinement
SCALA	data scaling
XDS	data reduction
PHENIX	phasing

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2015-07-22 
• Released Date: 2015-10-21 
• Deposition Author(s): Zanotti, G., Florio, P., Folli, C., Cianci, M., Del Rio, D., Berni, R.

Revision History 

• Version 1.0: 2015-10-21
  Type: Initial release
• Version 1.1: 2015-10-28
  Type: Database references
• Version 1.2: 2015-12-23
  Type: Database references