Suresh, CG and Vijayan, M (1983) X-ray studies on cyrstalline complexes involving amino acids and peptides. VIII. Head-to-tail arrangement and a specific interaction in the crystal structure of L-arginine acetate. In: International Journal of Peptide & Protein Research, 21 (3). pp. 223-226.
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L-Arginine acetate crystallizes in the monoclinic space group P2(1) with a = 9.229(2), b = 5.178(3), c = 13.271(4) A and beta = 111.4(1) degrees. The crystal structure was solved by direct methods and refined to an R value of 0.058 for 1333 observed reflections. The conformation of the arginine molecules in the crystal is different from those observed in the crystals of L-arginine, its salts and complexes. The crystal structure indicates that complexation with a small carboxylic acid like acetic acid is sufficient to align arginine molecules in a head-to-tail fashion. The structure contains a specific ion-pair interaction, involving electrostatic attraction as well as two nearly parallel, N-H ... O hydrogen bonds, between the guanidyl group and the acetate ion.
| Item Type: | Journal Article |
|---|---|
| Publication: | International Journal of Peptide & Protein Research |
| Publisher: | Munksgaard International Publishers |
| Additional Information: | Copyright of this article belongs to Munksgaard International Publishers. |
| Department/Centre: | Division of Biological Sciences > Molecular Biophysics Unit |
| Date Deposited: | 16 Jun 2008 |
| Last Modified: | 27 Aug 2008 13:28 |
| URI: | http://eprints.iisc.ac.in/id/eprint/14419 |
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