## Abstract Solution conformations of the cyclic pentapeptide plantβhormone malformin A, whose conformational freedom is constrained by an intramolecular disulfide bridge, are derived and presented here. The nmr and CD data of Ptak are used to place restrictions on the search for possible malformin
The conformation of malformin A
β Scribed by David Hall; Paul John Lyons; Nicola Pavitt; John A. Trezise
- Publisher
- John Wiley and Sons
- Year
- 1982
- Tongue
- English
- Weight
- 496 KB
- Volume
- 3
- Category
- Article
- ISSN
- 0192-8651
No coin nor oath required. For personal study only.
β¦ Synopsis
Abstract
The conformation of the cyclic pentapeptide malformin A has been deduced by systematically generating possible models for the molecule, and minimizing the conformation energy of each. Only one of the lowβenergy solutions is fully consistent with the reported CD and NMR spectra, and this is the proposed model. The disulfide ring linking adjacent cystine residues is highly strained, as has been predicted from the Sο£ΏS vibration frequency. The conformation of the backbone, but not that of the disulfide ring, is similar to a model previously proposed.
π SIMILAR VOLUMES
## Abstract The linkedβatomβleastβsquares (LALS) technique has been applied to generate exactly cyclized and stereochemically satisfactory conformations of the cyclic pentapeptide, malformin A, which contains an intramolecular disulfide bridge across a DβCysβDβCys linkage. Consistent with theoretic
## Abstract Malformin A is a cyclic pentapeptide with an intramolecular disulfide bridge. The conformation in solution of this molecule has been studied by NMR and CD. The 270 MHz Proton spectrum in dimethyl sulfoxide is well resolved and the peaks corresponding to the five residues have been assig
## Abstract The conformation of the depsipeptide pithomycolide has been deduced by systematically generating possible models for the molecule, and minimizing their conformation energy. Only one of lowβenergy solutions is consistent with the reported NMR data.