2B14 image
Entry Detail
PDB ID:
2B14
Title:
The crystal structure of 2,4-dinitrophenol in complex with the amyloidogenic variant Transthyretin Leu 55 Pro
Biological Source:
Source Organism:
Host Organism:
PDB Version:
Deposition Date:
2005-09-15
Release Date:
2006-07-18
Method Details:
Experimental Method:
Resolution:
2.00 Å
R-Value Free:
0.23
R-Value Work:
0.20
R-Value Observed:
0.20
Space Group:
P 21 21 2
Macromolecular Entities
Polymer Type:polypeptide(L)
Description:Transthyretin
Mutations:L55P
Chain IDs:A, B
Chain Length:127
Number of Molecules:2
Biological Source:Homo sapiens
Ligand Molecules
Primary Citation
The binding of 2,4-dinitrophenol to wild-type and amyloidogenic transthyretin
ACTA CRYSTALLOGR.,SECT.D 62 512 519 (2006)
PMID: 16627944 DOI: 10.1107/S0907444906006962

Abstact

Systemic deposition of transthyretin (TTR) amyloid fibrils is always observed in familial amyloidotic polyneuropathy, senile systemic amyloidosis and familial amyloidotic cardiomyopathy patients. Destabilization of the molecule leads to a cascade of events which result in fibril formation. The destabilization of a native protein with consequent conformational changes appears to be a common link in several human amyloid diseases. Intensive research has been directed towards finding small molecules that could work as therapeutic agents for the prevention/inhibition of amyloid diseases through stabilization of the native fold of the potentially amyloidogenic protein. This work provides insight into the structural determinants of the highly stabilizing effects of 2,4-dinitrophenol on wild-type TTR. It is also shown that similar interactions are established between this molecule and two highly amyloidogenic TTR variants: TTR L55P and TTR Y78F. In the three crystal complexes, 2,4-dinitrophenol occupies the two hormone-binding sites of the TTR tetramer. As a result of 2,4-dinitrophenol binding, the two dimers in the TTR tetramer become closer, increasing the stability of the protein. The three-dimensional structures now determined allow a comprehensive description of key interactions between transthyretin and 2,4-dinitrophenol, a small compound that holds promise as a template for the design of a therapeutical drug for amyloid diseases.

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Primary Citation of related structures