ISDA

Entry Detail

PDB ID:

5V65

Keywords:

DE NOVO PROTEIN

Title:

Crystal structure of macrocycles containing Abeta 17-23 (LV(PHI)FAED) and Abeta 30-36 (AII(SAR)L(ORN)V)

Biological Source:

Source Organism:

synthetic construct

PDB Version:

Deposition Date:

2017-03-15

Release Date:

2017-06-28

Method Details:

Experimental Method:

X-RAY DIFFRACTION

Resolution:

2.52 Å

R-Value Free:

0.28

R-Value Work:

0.22

R-Value Observed:

0.22

Space Group:

H 3

Download Validation Report

Macromolecular Entities

Polymer Type:polypeptide(L)
Description:ORN-LEU-VAL-PHI-PHE-ALA-GLU-ASP-ORN-ALA-ILE-ILE-SAR-LEU-MET-VAL
Chain IDs:A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P
Chain Length:16
Number of Molecules:16
Biological Source:synthetic construct

Primary Citation

X-ray Crystallographic Structure of a Compact Dodecamer from a Peptide Derived from A beta 16-36.

Salveson, P.J, Spencer, R.K, Kreutzer, A.G, Nowick, J.S.Show

Org. Lett. 19 3462 3465 (2017)

PMID: 28683555 DOI: 10.1021/acs.orglett.7b01445

Abstact

The assembly of the β-amyloid peptide, Aβ, into soluble oligomers is associated with neurodegeneration in Alzheimer's disease. The Aβ oligomers are thought to be composed of β-hairpins. Here, the effect of shifting the residue pairing of the β-hairpins on the structures of the oligomers that form is explored through X-ray crystallography. Three residue pairings were investigated using constrained macrocyclic β-hairpins in which Aβ30-36 is juxtaposed with Aβ17-23, Aβ16-22, and Aβ15-21. The Aβ16-22-Aβ30-36 pairing forms a compact ball-shaped dodecamer composed of fused triangular trimers. This dodecamer may help explain the structures of the trimers and dodecamers formed by full-length Aβ.

Legend

Protein

Chemical

Disease

Primary Citation of related structures