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
- PubMed: 25343607
- DOI: 10.1038/nchem.2043
- Primary Citation of Related Structures:
- PubMed Abstract:
- 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.USA 103: 3615
- 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
- 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
- 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
- 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
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 product ...
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.
Institute of Chemical Sciences and Engineering, Ecole Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland.