Biological Assembly 1  

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

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 28167.38 
• Atom Count: 1998 
• Residue Count: 254 
• Unique protein chains: 1

4HIQ

The Structure of V122I Mutant Transthyretin in Complex with AG10

• DOI: 10.2210/pdb4HIQ/pdb

• Classification: HORMONE BINDING PROTEIN/INHIBITOR
• Organism(s): Homo sapiens
• Expression System: Escherichia coli
• Mutation(s): 1 


• Deposited: 2012-10-11 Released: 2013-06-05 
• Deposition Author(s): Connelly, S., Alhamadsheh, M., Graef, I., Wilson, I.A.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.18 Å
• R-Value Free: 0.186 
• R-Value Work: 0.160 

Literature

AG10 inhibits amyloidogenesis and cellular toxicity of the familial amyloid cardiomyopathy-associated V122I transthyretin.

Penchala, S.C., Connelly, S., Wang, Y., Park, M.S., Zhao, L., Baranczak, A., Rappley, I., Vogel, H., Liedtke, M., Witteles, R.M., Powers, E.T., Reixach, N., Chan, W.K., Wilson, I.A., Kelly, J.W., Graef, I.A., Alhamadsheh, M.M.

(2013) Proc.Natl.Acad.Sci.USA 110: 9992-9997

• PubMed: 23716704 
• DOI: 10.1073/pnas.1300761110
• Primary Citation of Related Structures:  
  4HIS


• PubMed Abstract: 
  

The misassembly of soluble proteins into toxic aggregates, including amyloid fibrils, underlies a large number of human degenerative diseases. Cardiac amyloidoses, which are most commonly caused by aggregation of Ig light chains or transthyretin (TTR) in the cardiac interstitium and conducting system, represent an important and often underdiagnosed cause of heart failure. Two types of TTR-associated amyloid cardiomyopathies are clinically important. The Val122Ile (V122I) mutation, which alters the kinetic stability of TTR and affects 3% to 4% of African American subjects, can lead to development of familial amyloid cardiomyopathy. In addition, aggregation of WT TTR in individuals older than age 65 y causes senile systemic amyloidosis. TTR-mediated amyloid cardiomyopathies are chronic and progressive conditions that lead to arrhythmias, biventricular heart failure, and death. As no Food and Drug Administration-approved drugs are currently available for treatment of these diseases, the development of therapeutic agents that prevent TTR-mediated cardiotoxicity is desired. Here, we report the development of AG10, a potent and selective kinetic stabilizer of TTR. AG10 prevents dissociation of V122I-TTR in serum samples obtained from patients with familial amyloid cardiomyopathy. In contrast to other TTR stabilizers currently in clinical trials, AG10 stabilizes V122I- and WT-TTR equally well and also exceeds their efficacy to stabilize WT and mutant TTR in whole serum. Crystallographic studies of AG10 bound to V122I-TTR give valuable insights into how AG10 achieves such effective kinetic stabilization of TTR, which will also aid in designing better TTR stabilizers. The oral bioavailability of AG10, combined with additional desirable drug-like features, makes it a very promising candidate to treat TTR amyloid cardiomyopathy.

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Organizational Affiliation: 

Department of Pharmaceutics and Medicinal Chemistry, University of the Pacific, Stockton, CA 95211, USA.

Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
Transthyretin	A, B	127	Homo sapiens	Mutations: V122I Gene Names: TTR (PALB)
Find proteins for P02766 (Homo sapiens) Go to Gene View: TTR Go to UniProtKB:  P02766

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram & Interactions
16V	A, B	3-[3-(3,5-dimethyl-1H-pyrazol-4-yl)propoxy]-4-fluorobenzoic acid C15 H17 F N2 O3 WBFUHHBPNXWNCC-UHFFFAOYSA-N

External Ligand Annotations
ID	Binding Affinity (Sequence Identity %)
16V	Kd: 193 nM BINDINGMOAD
16V	Kd: 6.2 nM PDBBIND

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.18 Å
• R-Value Free: 0.186 
• R-Value Work: 0.160 
• Space Group: P 2₁ 2₁ 2

Unit Cell:

Length (Å)	Angle (°)
a = 42.727	α = 90.00
b = 84.839	β = 90.00
c = 63.910	γ = 90.00

Software Package:

Software Name	Purpose
PDB_EXTRACT	data extraction
PHASER	phasing
REFMAC	refinement
Blu-Ice	data collection
autoXDS	data reduction
autoXDS	data scaling

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2012-10-11 
• Released Date: 2013-06-05 
• Deposition Author(s): Connelly, S., Alhamadsheh, M., Graef, I., Wilson, I.A.

Revision History 

• Version 1.0: 2013-06-05
  Type: Initial release
• Version 1.1: 2013-07-10
  Type: Database references