Biological Assembly 1  

 3D View: Structure | Electron Density | Ligand Interaction

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

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

Macromolecule Content

• Total Structure Weight: 28.00 kDa 
• Atom Count: 2081 
• Residue Count: 229 
• Unique protein chains: 1

2QGE

Human transthyretin (TTR) complexed with 2-(3,5-Dimethylphenyl)benzoxazole

• DOI: 10.2210/pdb2QGE/pdb

• Classification: Hormone/Growth Factor
• Organism(s): Homo sapiens
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2007-06-28 Released: 2008-02-05 
• Deposition Author(s): Connelly, S., Wilson, I.A.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.45 Å
• R-Value Free: 0.200 
• R-Value Work: 0.164 
• R-Value Observed: 0.166 

Literature

Biochemical and structural evaluation of highly selective 2-arylbenzoxazole-based transthyretin amyloidogenesis inhibitors.

Johnson, S.M., Connelly, S., Wilson, I.A., Kelly, J.W.

(2008) J Med Chem 51: 260-270

• PubMed: 18095641 
• DOI: 10.1021/jm0708735
• Primary Citation of Related Structures:  
  2QGE, 2QGD, 2QGC, 2QGB


• PubMed Abstract: 
  

To develop potent transthyretin (TTR) amyloidogenesis inhibitors that also display high binding selectivity in blood, it proves useful to systematically optimize each of the three substructural elements that comprise a typical inhibitor: the two aryl rings and the linker joining them. In the first study, described herein, structural modifications to one aryl ring were evaluated by screening a library of 2-arylbenzoxazoles bearing thyroid hormone-like aryl substituents on the 2-aryl ring. Several potent and highly selective amyloidogenesis inhibitors were identified that exhibit minimal thyroid hormone nuclear receptor and COX-1 binding. High resolution crystal structures (1.3-1.5 A) of three inhibitors (2f, 4f, and 4d) in complex with TTR were obtained to characterize their binding orientation. Collectively, the results demonstrate that thyroid hormone-like substitution patterns on one aryl ring lead to potent and highly selective TTR amyloidogenesis inhibitors that lack undesirable thyroid hormone receptor or COX-1 binding.

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Organizational Affiliation: 

Department of Chemistry, The Scripps Research Institute, BCC 265, 10550 North Torrey Pines Road, La Jolla, California 92037, USA.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Transthyretin	A, B	127	Homo sapiens	Mutation(s): 0  Gene Names: TTR, PALB
Find proteins for P02766 (Homo sapiens) Explore P02766  Go to UniProtKB:  P02766
NIH Common Fund Data Resources
PHAROS:  P02766 GTEx:  ENSG00000118271

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
MR6	A, B	2-(3,5-DIMETHYLPHENYL)-1,3-BENZOXAZOLE C15 H13 N O BIHLSRJPJFOESJ-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.45 Å
• R-Value Free: 0.200 
• R-Value Work: 0.164 
• R-Value Observed: 0.166 
• Space Group: P 2₁ 2₁ 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 42.917	α = 90
b = 85.777	β = 90
c = 64.563	γ = 90

Software Package:

Software Name	Purpose
DENZO	data reduction
SCALEPACK	data scaling
REFMAC	refinement
PDB_EXTRACT	data extraction
HKL-2000	data collection
HKL-2000	data reduction
PHASER	phasing

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2007-06-28 
• Released Date: 2008-02-05 
Deposition Author(s): Connelly, S., Wilson, I.A.

Revision History 

• Version 1.0: 2008-02-05
  Type: Initial release
  
• Version 1.1: 2011-07-13
  Changes: Derived calculations, Version format compliance
• Version 1.2: 2017-10-18
  Changes: Refinement description