CONFORMATIONAL ENERGY CALCULATIONS ON ENKEPHALINS AND ENKEPHALIN ANALOGS:
- 1 September 1981
- journal article
- research article
- Published by Wiley in International Journal of Peptide and Protein Research
- Vol. 18 (3) , 256-275
- https://doi.org/10.1111/j.1399-3011.1981.tb02980.x
Abstract
Conformational energy calculations were carried out on the peptide enkephalins (ENK) and selected analogs to find those conformers of low energy. The analogs studied include [D-Ala2]Enk-NH2, [D-Ala2]Enk, [D-Met2, Pro5]Enk-NH2, [D-Ala2, D-Phe5]Enk, [D-Ala2, D-Leu5]Enk, [D-Ala2, (N-Me)Phe4, Met5] Enk-NH2 and [D-Ala2, (N-Me)Met5]Enk-NH2. When the low-energy conformers for all the analogs are compared, different allowed backbone conformations are found which orient the functional side-chains such that three classifications of structures appear. Each classification shows a unique configuration of side- chain positions in space even though different backbone conformations are found within each classification.Keywords
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