1g1o
From Proteopedia
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| , resolution 2.3Å | |||||||
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CRYSTAL STRUCTURE OF THE HIGHLY AMYLOIDOGENIC TRANSTHYRETIN MUTANT TTR G53S/E54D/L55S
Contents |
Overview
Transthyretin is a tetrameric plasma protein associated with two forms of amyloid disease. The structure of the highly amyloidogenic transthyretin triple mutant TTRG53S/E54D/L55S determined at 2.3 A resolution reveals a novel conformation: the beta-slip. A three-residue shift in beta strand D places Leu-58 at the position normally occupied by Leu-55 now mutated to serine. The beta-slip is best defined in two of the four monomers, where it makes new protein-protein interactions to an area normally involved in complex formation with retinol-binding protein. This interaction creates unique packing arrangements, where two protein helices combine to form a double helix in agreement with fiber diffraction and electron microscopy data. Based on these findings, a novel model for transthyretin amyloid formation is presented.
Disease
Known diseases associated with this structure: Amyloid neuropathy, familial, several allelic types OMIM:[176300], Amyloidosis, senile systemic OMIM:[176300], Carpal tunnel syndrome, familial OMIM:[176300], Dystransthyretinemic hyperthyroxinemia OMIM:[176300]
About this Structure
1G1O is a Single protein structure of sequence from Homo sapiens. Full crystallographic information is available from OCA.
Reference
The beta-slip: a novel concept in transthyretin amyloidosis., Eneqvist T, Andersson K, Olofsson A, Lundgren E, Sauer-Eriksson AE, Mol Cell. 2000 Nov;6(5):1207-18. PMID:11106758
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