Solution structure of the cyclotide cycloviolacin O2 with Glu6 methylated (cyO2Me)
(2S)-2-amino-5-methoxy-5-oxopentanoic acid
The conserved glu in the cyclotide cycloviolacin O2 has a key structural role.
NMR structure of the cyclotide cycloviolacin O2 in which the side chain carboxyl group of Glu6 has been chemically modified in the form of a methylation.
NMR structure of the native unmodified peptide.
Structures were generated using torsion angle dynamics within the program CNS and refined and energy minimised using Cartesian dynamics in explicit water.
1-2 mM cycloviolacin O2(Me), 90% H2O/10% D2O
Brunger, Adams, Clore, Gros, Nilges and Read
cyclotide, cyclic cystine knot, circular protein, methylation, Cytolysis, Disulfide bond, Hemolysis, Knottin, Plant defense, PLANT PROTEIN