ISDA

Deposition Date 2004-02-11

Release Date 2004-02-24

Last Version Date 2024-11-20

Entry Detail

PDB ID:

1SBU

Keywords:

TOXIN

Title:

NMR structure of a peptide containing a dimetylthiazolidine : an analog of delta conotoxin EVIA loop 2

Biological Source:

Source Organism:

Conus ermineus (Taxon ID: 55423)

Method Details:

Experimental Method:

SOLUTION NMR

Conformers Calculated:

Conformers Submitted:

Selection Criteria:

structures with the least restraint violations, structures with the lowest energy

Download Validation Report

Macromolecular Entities

Polymer Type:polypeptide(L)
Molecule:delta-conotoxin EVIA
Chain IDs:A
Chain Length:11
Number of Molecules:1
Biological Source:Conus ermineus

Modified Residue

Compound ID	Chain ID	Parent Comp ID	Details	2D Image
2MT	A	PRO	?

Ligand Molecules

Primary Citation

A case study of 2,2-dimethylthiazolidine as locked cis proline amide bond: synthesis, NMR and molecular modeling studies of a [small delta]-conotoxin EVIA peptide analog.

Chierici, S, Jourdan, M, Figuet, M, Dumy, P.Show

Org.Biomol.Chem. 2 2437 2441 (2004)

PMID: 15326523 DOI: 10.1039/b408325c

Abstact

The delta-conotoxin EVIA from the Conus ermineus venom, a recently characterized toxin, exhibits cis-trans isomerism of the Leu12-Pro13 bond associated with the triggering of its biological activity. In this paper we use the pseudoproline concept to target the presumed bioactive cis conformation. We report the design and the synthesis of loop 2 analogs from residue 8 to 18 containing either the cis-inducing Cys(PsiMe,MePro)13 unit or the natural proline residue. NMR studies in water and molecular modeling allowed us to identify the amide bond "locked" in a cis conformation for as in the suggested bioactive form of the natural toxin.

Legend

Protein

Chemical

Disease

Primary Citation of related structures