Abstract
Studies on the Thz, Thn and Oxn containing cyclic peptides, lissoclinamides 9 (9) and 10 (10) isolated from the Indo-Pacific ascidian (seasquirt) Lissoclinum patella have delineated their metal binding selectivity. MS and CD competition studies show that lissoclinamide 10 (10) shows selectivity for Cu2+ in the presence of an excess of Zn2+ whereas lissoclinamide 9 (9) is less selective for Cu2+. Comparison of the solution state conformations derived from nOe restrained molecular dynamics and additional Monte-Carlo conformational searches suggested binding environments for the Cu2+ which confirmed the MS measurements and suggested a reason for the selectivity in the case of lissoclinamides 9 and 10. (C) 2001 Elsevier Science Ltd. All rights reserved.
Original language | English |
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Pages (from-to) | 3199-3207 |
Number of pages | 8 |
Journal | Tetrahedron |
Volume | 57 |
Issue number | 15 |
DOIs | |
Publication status | Published - 2001 |
Keywords
- complexation
- natural products
- circular dichroism
- mass spectrometry
- CYCLIC-PEPTIDES