X-ray Studies On Crystalline Complexes Involving Amino-acids And Peptides .10. Head-to-tail Sequences In The Crystal-structure Of L-lysine Acetate

Content Provider	Indian Institute of Science (IISc)
Author	Suresh, C. G. Vijayan, M.
Copyright Year	1983
Abstract	l-Lysine acetate crystallises in the monoclinic space group P21 with a = 5.411 (1), b = 7.562(1), c= l2.635(2) êA and (Sb(B = 91.7(1). The crystal structure was solved by direct methods and refined to an R value of 0.049 using the full matrix least squares method. The conformation and the aggregation of lysine molecules in the structure are similar to those found in the crystal structure of l-lysine l-aspartate. A conspicuous similarity between the crystal structures of l-arginine acetate and l-lysine acetate is that in both cases the strongly basic side chain, although having the largest pK value, interacts with the weakly acidic acetate group leaving the (Sa(B-amino and the (Sa(B-carboxylate groups to take part in head-to-tail sequences. These structures thus indicate that electrostatic effects are strongly modulated by other factors so as to give rise to head-to-tail sequences which have earlier been shown to be an almost universal feature of amino acid aggregation in the solid state.
File Format	PDF
Journal	PeerReviewed
Language	English
Publisher	Munksgaard International Publications
Publisher Date	1983-01-01
Access Restriction	Authorized
Subject Keyword	Molecular Biophysics Unit
Content Type	Text
Resource Type	Article