Water mediated tube in tetrapeptide cyclo(Phe-Pro-Leu-Aha) trihydrate and crystal structure of cyclo(d-Phe-Pro-Leu-Aha) anhydrate
Water mediated tube in tetrapeptide cyclo(Phe-Pro-Leu-Aha) trihydrate and crystal structure of cyclo(d-Phe-Pro-Leu-Aha) anhydrate
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Date
2007-10-12
Authors
Rajesh, B. M.
Iqbal, Javed
Babu, N. Jagadeesh
Nangia, Ashwini
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Abstract
Water molecules connect 6.5 × 4.5 Å diameter rings in the X-ray crystal structure of 16-member tetrapeptide cyclo(Phe-Pro-Leu-Aha) (1) trihydrate. However, stereoisomer cyclo(d-Phe-Pro-Leu-Aha) (2) crystallized in anhydrate form. Structural differences in l- to d-amino acid exchanged cyclic peptides are analyzed. © The Royal Society of Chemistry.
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CrystEngComm. v.9(10)