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 1.1 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: 10.1038/nchem.2043
  • Primary Citation of Related Structures:  
    4OS1, 4OS2, 4OS4, 4OS5, 4OS6, 4OS7, 2MOA

  • 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 ...

    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.


    Related Citations: 
    • Solution structure of alpha-conotoxin ImI by 1H nuclear magnetic resonance.
      Gehrmann, J., Daly, N.L., Alewood, P.F., Craik, D.J.
      (1999) J Med Chem 42: 2364
    • NMR spatial structure of alpha-conotoxin ImI reveals a common scaffold in snail and snake toxins recognizing neuronal nicotinic acetylcholine receptors.
      Maslennikov, I.V., Shenkarev, Z.O., Zhmak, M.N., Ivanov, V.T., Methfessel, C., Tsetlin, V.I., Arseniev, A.S.
      (1999) FEBS Lett 444: 275
    • NMR solution structure of alpha-conotoxin ImI and comparison to other conotoxins specific for neuronal nicotinic acetylcholine receptors.
      Rogers, J.P., Luginbuhl, P., Shen, G.S., McCabe, R.T., Stevens, R.C., Wemmer, D.E.
      (1999) Biochemistry 38: 3874
    • Minimal conformation of the alpha-conotoxin ImI for the alpha7 neuronal nicotinic acetylcholine receptor recognition: correlated CD, NMR and binding studies.
      Lamthanh, H., Jegou-Matheron, C., Servent, D., Menez, A., Lancelin, J.M.
      (1999) FEBS Lett 454: 293
    • Structural determinants of selective alpha-conotoxin binding to a nicotinic acetylcholine receptor homolog AChBP.
      Ulens, C., Hogg, R.C., Celie, P.H., Bertrand, D., Tsetlin, V., Smit, A.B., Sixma, T.K.
      (2006) Proc Natl Acad Sci U S A 103: 3615

    Organizational Affiliation

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



Macromolecules
  • Find similar proteins by:  Sequence   |   Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Alpha-conotoxin ImIA13Conus imperialisMutation(s): 3 
UniProt
Find proteins for P50983 (Conus imperialis)
Explore P50983 
Go to UniProtKB:  P50983
Protein Feature View
Expand
  • Reference Sequence
Biologically Interesting Molecules (External Reference) 1 Unique
Entity ID: 1
IDChainsNameType/Class2D Diagram3D Interactions
PRD_001232
Query on PRD_001232
AAlpha-conotoxin ImI mutantCyclic peptide /  Toxin Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 50 
  • Conformers Submitted: 20 
  • Selection Criteria: target function 
  • OLDERADO: 2MOA Olderado

Structure Validation

View Full Validation Report




Entry History 

Deposition Data

  • Deposited Date: 2014-04-24 
  • Released Date: 2014-09-24 
  • Deposition Author(s): Heinis, C., Chen, S.

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