1RVS

STRUCTURE OF TRANSTHYRETIN IN AMYLOID FIBRILS DETERMINED BY SOLID-STATE MAGIC ANGLE SPINNING NMR

DOI: 10.2210/pdb1RVS/pdb

Classification: DE NOVO PROTEIN
Mutation(s): No

Deposited: 2003-12-14 Released: 2004-01-20
Deposition Author(s): Jaroniec, C.P., Macphee, C.E., Bajaj, V.S., Mcmahon, M.T., Dobson, C.M., Griffin, R.G.

Experimental Data Snapshot

Method: SOLID-STATE NMR
Conformers Calculated: 20
Conformers Submitted: 20
Selection Criteria: structures with the least restraint violations

wwPDB Validation 3D Report Full Report

This is version 1.2 of the entry. See complete history.

Literature

High-resolution molecular structure of a peptide in an amyloid fibril determined by magic angle spinning NMR spectroscopy

Jaroniec, C.P., MacPhee, C.E., Bajaj, V.S., McMahon, M.T., Dobson, C.M., Griffin, R.G.

(2004) Proc Natl Acad Sci U S A 101: 711-716

PubMed: 14715898 Search on PubMedSearch on PubMed Central
DOI: 10.1073/pnas.0304849101
Primary Citation of Related Structures:
1RVS

PubMed Abstract:

Amyloid fibrils are self-assembled filamentous structures associated with protein deposition conditions including Alzheimer's disease and the transmissible spongiform encephalopathies. Despite the immense medical importance of amyloid fibrils, no atomic-resolution structures are available for these materials, because the intact fibrils are insoluble and do not form diffraction-quality 3D crystals. Here we report the high-resolution structure of a peptide fragment of the amyloidogenic protein transthyretin, TTR(105-115), in its fibrillar form, determined by magic angle spinning NMR spectroscopy. The structure resolves not only the backbone fold but also the precise conformation of the side chains. Nearly complete (13)C and (15)N resonance assignments for TTR(105-115) formed the basis for the extraction of a set of distance and dihedral angle restraints. A total of 76 self-consistent experimental measurements, including 41 restraints on 19 backbone dihedral angles and 35 (13)C-(15)N distances between 3 and 6 A were obtained from 2D and 3D NMR spectra recorded on three fibril samples uniformly (13)C, (15)N-labeled in consecutive stretches of four amino acids and used to calculate an ensemble of peptide structures. Our results indicate that TTR(105-115) adopts an extended beta-strand conformation in the amyloid fibrils such that both the main- and side-chain torsion angles are close to their optimal values. Moreover, the structure of this peptide in the fibrillar form has a degree of long-range order that is generally associated only with crystalline materials. These findings provide an explanation of the unusual stability and characteristic properties of this form of polypeptide assembly.

Related Citations:

Molecular Conformation of a Peptide Fragment of Transthyretin in an Amyloid Fibril
Jaroniec, C.P., MacPhee, C.E., Astrof, N.S., Dobson, C.M., Griffin, R.G.
(2002) Proc Natl Acad Sci U S A 99: 16748

Organizational Affiliation:

Department of Chemistry and Center for Magnetic Resonance, Francis Bitter Magnet Laboratory, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.

Macromolecules

Find similar proteins by: Sequence | Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Transthyretin	A	11	N/A	Mutation(s): 0
UniProt
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Reference Sequence