Synthesis of the All-l Cyclopentapeptides Versicoloritides A, B, and C
摘要:
Herein we describe the first synthesis of the all-L naturally occurring cyclopentapeptides versicoloritides A, B, and C. We found that the extent of oligomerization and epimerization upon head-to-tail cyclization of the linear pentapeptide precursors could be reduced to acceptable levels by modifying the reaction conditions.
Synthesis and in vitro bone cell activity of analogues of the cyclohexapeptide dianthin G
作者:Zaid Amso、Renata Kowalczyk、Young-Eun Park、Maureen Watson、Jian-ming Lin、David S. Musson、Jillian Cornish、Margaret A. Brimble
DOI:10.1039/c6ob00983b
日期:——
Dianthin G and its dicarba analogue were both shown to increase the number of human osteoblasts without affecting bone resorption.
Dianthin G及其二碳模拟物均显示能增加人类成骨细胞的数量,而不影响骨吸收。
Synthesis and incorporation of an advanced lipid peroxidation end-product building block into collagen mimetic peptides
作者:Iman Kavianinia、Sung-Hyun Yang、Harveen Kaur、Paul W. R. Harris、Renwick C. J. Dobson、Antony J. Fairbanks、Margaret A. Brimble
DOI:10.1039/c7cc05025a
日期:——
their potential therapeutic value, there are no suitably protected ALE buildingblocks reported in the literature to enable their site-specific incorporation into synthetic peptides. The synthesis of an Fmoc-protected ALE buildingblock, Nϵ-(3-methylpyridinium)lysine (MP-lysine) and its incorporation into collagen model peptides is reported.
Synthesis and biological evaluation of the osteoblast proliferating cyclic peptides dianthins G and H
作者:Harveen Kaur、Amanda M. Heapy、Renata Kowalczyk、Zaid Amso、Maureen Watson、Jillian Cornish、Margaret A. Brimble
DOI:10.1016/j.tet.2014.04.035
日期:2014.10
The first synthesis and osteoblast proliferative activity of the naturally occurring cyclic peptides dianthins G and H is described. The greater potency of naturally occurring dianthin G over dianthin H at physiological concentrations mirrored the osteoblast proliferative activity observed for synthetic dianthins G and H. Six alanine-scan analogues of the more potent dianthin G were also synthesised and osteoblast assays revealed that four of the six residues can be further modified for improved activity. We also confirmed by variable temperature H-1 NMR spectroscopic analysis that the sets of major and minor signals observed for dianthins G and H in DMSO-d(6) are in fact due to cis-trans rotational isomers of the praline ring. (C) 2014 Elsevier Ltd. All rights reserved.
Synthesis of the All-l Cyclopentapeptides Versicoloritides A, B, and C
作者:Margaret Brimble、Harveen Kaur、Amanda Heapy
DOI:10.1055/s-0032-1316994
日期:——
Herein we describe the first synthesis of the all-L naturally occurring cyclopentapeptides versicoloritides A, B, and C. We found that the extent of oligomerization and epimerization upon head-to-tail cyclization of the linear pentapeptide precursors could be reduced to acceptable levels by modifying the reaction conditions.