Structural Insights into the Hydrogen-Bonding and Folding Pattern in Ant-Ant-Pro-Gly Tetrapeptides
作者:Sachin B. Baravkar、Amol S. Kotmale、Samir R. Shaikh、Rajesh G. Gonnade、Gangadhar J. Sanjayan
DOI:10.1002/ejoc.201700181
日期:2017.5.26
and folding pattern in Ant-Ant-Pro-Gly tetrapeptides (Ant: anthranilic acid; Pro: proline; and Gly: glycine). Comparison of the C-terminal esters and their amide analogs revealed strikingly different H-bonding networks. Whereas the esteranalogs displayed an open structure without terminal H-bonding interactions, the amide analogs showed a completely folded structure. Structural details were revealed
在本文中,我们提供了对 Ant-Ant-Pro-Gly 四肽(Ant:邻氨基苯甲酸;Pro:脯氨酸;和 Gly:甘氨酸)中氢键和折叠模式的结构见解。C 端酯和它们的酰胺类似物的比较揭示了截然不同的 H 键网络。酯类似物显示出没有末端 H 键相互作用的开放结构,而酰胺类似物显示出完全折叠的结构。通过结合使用 X 射线晶体结构研究和基于 NOE 的分子动力学 (MD) 模拟研究,揭示了结构细节。
Synthesis of peptides containing a sulfinamide or a sulfonamide transition-state isostere
作者:Wilna J. Moree、Liesbeth C. van Gent、Gijs A. van der Marel、Rob M.J. Liskamp
DOI:10.1016/s0040-4020(01)86293-1
日期:1993.1
A versatile synthesis of peptides incorporating the sulfonamide or sulfonamide transition-state analogue is described. Apart from the easily accessible Gly-Xxx isosteres used as haptens to elicit catalytic antibodies, other amino acids than Gly can be prepared by alpha-alkylation of the sulfonamide containing peptides. This is illustrated with the synthesis of a potential HIV-protease inhibitor 27.
Peptides containing the novel methylphosphinamide transition-state isostere
作者:Wilna J. Moree、Gijs A. van der Marel、Jacques H. van Boom、Rob M.J. Liskamp
DOI:10.1016/s0040-4020(01)80258-1
日期:1993.1
A convenient route towards the synthesis of peptides containing the methylphosphinamide moiety as a novel transition-state isostere of the amide bond hydrolysis is described. The key step being the coupling of a methylphosphinic chloride with an amino acid or peptide protected at the C-terminus. A proper choice of the amino protecting group appeared to be essential.