1R9V image
Deposition Date 2003-10-31
Release Date 2003-12-02
Last Version Date 2023-11-15
Entry Detail
PDB ID:
1R9V
Keywords:
DE NOVO PROTEIN
Title:
NMR Structure of a D,L-Alternating Dodecamer of Norleucine
Biological Source:
Source Organism:
(Taxon ID: )
Method Details:
Experimental Method:
SOLUTION NMR
Conformers Calculated:
25
Conformers Submitted:
5
Selection Criteria:
structures with the lowest energy
1R9V validation report
Macromolecular Entities
Polymer Type:polypeptide(L)
Molecule:BOC-(D-NLE-L-NLE)4-D-NLE(METHYL)-L-NLE-D-NLE-L-NLE METHYL ESTER
Chain IDs:A
Chain Length:13
Number of Molecules:1
Biological Source:
Modified Residue
Compound ID Chain ID Parent Comp ID Details 2D Image
NLE A LEU NORLEUCINE
NLO A LEU O-METHYL-L-NORLEUCINE
Ligand Molecules
NA
Peptide-like Molecules
PRD_000106
Primary Citation
Solution NMR Structure of a D,L-Alternating Oligonorleucine as a Model of Beta-Helix
Biopolymers 59 110 119 (2001)
PMID: 11373724 DOI: 10.1002/1097-0282(200108)59:2<110::AID-BIP1010>3.3.CO;2-J

Abstact

beta-Helix structures are of particular interest due to their capacity to form transmembrane channels with different transport properties. However, the relatively large number of beta-helices configurations does not allow a direct conformational analysis of beta-helical oligopeptides. A synthetic alternating D,L-oligopeptide with twelve norleucines (XIIMe) has been used as a model to get insight in the conformational features of beta-helix structures. The spatial configuration of XIIMe in solution has been determined by NMR. An extensive set of distances (nuclear Overhauser effect) and dihedral (J coupling constants) constraints have been included in molecular dynamics calculations. The NMR experimental data and theoretical calculations clearly indicate that the XIIMe adopts a single beta(4.4)-helix-type conformation in nonpolar solvents.

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Primary Citation of related structures
1R9V