2MOA

Solution NMR structure of peptide ImI1 (peak 2)


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 50 
  • Conformers Submitted: 20 
  • Selection Criteria: target function 

wwPDB Validation   3D Report Full Report


This is version 2.0 of the entry. See complete history


Literature

Dithiol amino acids can structurally shape and enhance the ligand-binding properties of polypeptides.

Chen, S.Gopalakrishnan, R.Schaer, T.Marger, F.Hovius, R.Bertrand, D.Pojer, F.Heinis, C.

(2014) Nat Chem 6: 1009-1016

  • DOI: https://doi.org/10.1038/nchem.2043
  • Primary Citation of Related Structures:  
    2MOA, 4OS1, 4OS2, 4OS4, 4OS5, 4OS6, 4OS7

  • PubMed Abstract: 

    The disulfide bonds that form between two cysteine residues are important in defining and rigidifying the structures of proteins and peptides. In polypeptides containing multiple cysteine residues, disulfide isomerization can lead to multiple products with different biological activities. Here, we describe the development of a dithiol amino acid (Dtaa) that can form two disulfide bridges at a single amino acid site. Application of Dtaas to a serine protease inhibitor and a nicotinic acetylcholine receptor inhibitor that contain disulfide constraints enhanced their inhibitory activities 40- and 7.6-fold, respectively. X-ray crystallographic and NMR structure analysis show that the peptide ligands containing Dtaas have retained their native tertiary structures. We furthermore show that replacement of two cysteines by Dtaas can avoid the formation of disulfide bond isomers. With these properties, Dtaas are likely to have broad application in the rational design or directed evolution of peptides and proteins with high activity and stability.


  • Organizational Affiliation

    Institute of Chemical Sciences and Engineering, Ecole Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland.


Macromolecules

Find similar proteins by:  Sequence   |   3D Structure  

Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Alpha-conotoxin ImI13Conus imperialisMutation(s): 3 
UniProt
Find proteins for P50983 (Conus imperialis)
Explore P50983 
Go to UniProtKB:  P50983
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP50983
Sequence Annotations
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  • Reference Sequence
Biologically Interesting Molecules (External Reference) 1 Unique
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 50 
  • Conformers Submitted: 20 
  • Selection Criteria: target function 

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2014-09-24
    Type: Initial release
  • Version 1.1: 2014-11-05
    Changes: Database references
  • Version 1.2: 2023-06-14
    Changes: Data collection, Database references, Derived calculations, Other
  • Version 2.0: 2023-11-15
    Changes: Atomic model, Data collection