3F86 image
Deposition Date 2008-11-11
Release Date 2009-07-21
Last Version Date 2023-11-15
Entry Detail
PDB ID:
3F86
Keywords:
UNKNOWN FUNCTION
Title:
An alpha/beta-Peptide Helix Bundle with a Pure beta-Amino Acid Core and a Distinctive Quaternary Structure: GCN4pLI derivative with beta residues at a and d heptad positions
Biological Source:
Source Organism:
Method Details:
Experimental Method:
X-RAY DIFFRACTION
Resolution:
2.00 Å
R-Value Free:
0.26
R-Value Work:
0.20
R-Value Observed:
0.20
Space Group:
P 1 21 1
3F86 validation report
Macromolecular Entities
Polymer Type:polypeptide(L)
Molecule:GCN4pLI-betaAD
Chain IDs:A, B, C, D, E, F, G, H
Chain Length:34
Number of Molecules:8
Biological Source:
Modified Residue
Compound ID Chain ID Parent Comp ID Details 2D Image
HMR A ARG BETA-HOMOARGININE
Primary Citation
An alpha/beta-peptide helix bundle with a pure beta3-amino acid core and a distinctive quaternary structure.
J.Am.Chem.Soc. 131 9860 9861 (2009)
PMID: 19580264 DOI: 10.1021/ja8099294

Abstact

Helix bundles are among the most widely studied tertiary and quaternary structural motifs in proteins. Here we present the crystal structure of an alpha/beta-peptide foldamer that adopts a tetrameric helix-bundle quaternary structure with a hydrophobic core composed solely of beta-amino acids. The structure displays features that are unprecedented among all known helix bundles composed of either alpha-peptides or peptidic foldamers. The tetramer is characterized by an asymmetry of interaction between neighboring helices, and the side-chain packing within the hydrophobic core differs fundamentally from the knobs-into-holes arrangement typical of most helix bundles.

Legend

Protein

Chemical

Disease

Primary Citation of related structures
2OXK
2OXJ
1GCL
2ZTA
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