Metal-Peptide Torus Knots from Flexible Short Peptides
作者:Yuuki Inomata、Tomohisa Sawada、Makoto Fujita
DOI:10.1016/j.chempr.2019.12.009
日期:2020.1
peptide-mimic structures created through folding and assembly of silver(I) ions and a triglycine ligand (L). The highly flexible triglycine strand assembled into a septafoil knot ([Ag⋅L]7) and its eight-crossing link analog ([Ag⋅L]8), both of which were formed for the first time by chemical synthesis. The two structures result from circular oligomerization of the same 1-crossing Ag⋅L motif. We also obtained poly[n]catenane
字符串经常在宏观上遇到缠结,但很少用于纳米级构造中。在这里,我们报告高度折叠的肽模拟结构,通过折叠和组装银(I)离子和三甘氨酸配体(L)产生。高柔性的三甘氨酸链组装成七叶形结([Ag⋅L] 7)和它的八个交叉连接类似物([Ag⋅L] 8),两者都是通过化学合成首次形成的。这两个结构是由相同的1个交联的Ag⋅L基序的圆形低聚产生的。我们还获得了聚[ n ] catenane [Ag⋅L] n来自拓扑异构的2交点基序。我们的观察结果表明,短肽的动态键合使得易于进入打结的结构,而这种结构由于长肽链中自穿线过程的熵(和/或动力学)劣势而在蛋白质结构中受到限制,并且在自身结构中具有显着的立体选择性。组装过程。
Metal–Peptide Nonafoil Knots and Decafoil Supercoils
作者:Yuuki Inomata、Tomohisa Sawada、Makoto Fujita
DOI:10.1021/jacs.1c08094
日期:2021.10.13
structures, the latent potential of peptide strands to form entangled structures is rarely discussed in peptide chemistry. Here we report the construction of highly entangled molecular topologies from Ag(I) ions and tripeptide ligands. The efficient entanglement of metal–peptide strands and the wide scope for design of the amino acid side chains in these ligands enabled the construction of metal–peptide
Interaction of CYP3A4 with Rationally Designed Ritonavir Analogues: Impact of Steric Constraints Imposed on the Heme-Ligating Group and the End-Pyridine Attachment
作者:Eric R. Samuels、Irina F. Sevrioukova
DOI:10.3390/ijms23137291
日期:——
improved via a rational structure-based design. This study investigated eight (series VI) inhibitors differing in head- and end-moieties and their respective linkers. SAR analysis revealed the multifactorial regulation of inhibitory strength, with steric constraints imposed on the tethered heme-ligating moiety being a key factor. Minimization of these constraints by changing the linkers’ length/flexibility