ISDA: 3F87

Deposition Date 2008-11-11

Release Date 2009-07-21

Last Version Date 2023-11-15

Entry Detail

PDB ID:

3F87

Keywords:

UNKNOWN FUNCTION

Title:

An alpha/beta-Peptide Helix Bundle with a Pure beta-Amino Acid Core and a Distinctive Quarternary Structure: GCN4pLI derivative with beta residues at a and d heptad positions - higher symmetry crystal

Biological Source:

Source Organism:

Method Details:

Experimental Method:

X-RAY DIFFRACTION

Resolution:

2.40 Å

R-Value Free:

0.29

R-Value Work:

0.23

R-Value Observed:

0.23

Space Group:

P 43 21 2

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Macromolecular Entities

Polymer Type:polypeptide(L)
Molecule:GCN4pLI-betaAD
Chain IDs:A, B, C, D
Chain Length:34
Number of Molecules:4
Biological Source:

Modified Residue

Compound ID	Chain ID	Parent Comp ID	Details	2D Image
HMR	A	ARG	BETA-HOMOARGININE

Ligand Molecules

IOD

Primary Citation

An alpha/beta-peptide helix bundle with a pure beta3-amino acid core and a distinctive quaternary structure.

Giuliano, M.W, Horne, W.S, Gellman, S.H.Show

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.

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Primary Citation of related structures

Abstact

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