Varughese, K. I. ; Lu, C. T. ; Kartha, G. (1981) Crystal structure and conformation of cyclo-L-cystine International Journal of Peptide and Protein Research, 18 (1). pp. 88-102. ISSN 0367-8377
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Official URL: http://onlinelibrary.wiley.com/doi/10.1111/j.1399-...
Related URL: http://dx.doi.org/10.1111/j.1399-3011.1981.tb02043.x
Abstract
X-ray crystallographic investigations on cyclo-L-cystine show that the diketo-piperazine ring is in a twisted boat form and the C-S-S-C bridge across the Cα atoms has a negative chirality with X3 angle of - 94°. The two peptides are significantly nonplanar with the ω values of - 10° and - 16°. The crystals are orthorhombic, space group P212121 with a = 11.216(4), b = 12.874(4), c = 5.978(3) and Z = 4. The structure was solved by heavy atom method and refined to an R index of 0.065.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to Munksgaard International Publishers. |
| Keywords: | Chirality; Cyclic Dipeptide; Cyclo-Cystine; Diketopiperazine; Disulfide Bridge |
| ID Code: | 28708 |
| Deposited On: | 15 Dec 2010 11:41 |
| Last Modified: | 04 Jun 2011 09:01 |
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