Self-Assembly Can Direct Dynamic Covalent Bond Formation toward Diversity or Specificity
摘要:
With the advent of reversible covalent chemistry the study of the interplay between covalent bond formation and noncovalent interactions has become increasingly relevant. Here we report that the interplay between reversible disulfide chemistry and self-assembly can give rise either to molecular diversity, i.e., the emergence of a unprecedentedly large range of macrocycles or to molecular specificity, i.e., the autocatalytic emergence of a single species. The two phenomena are the result of two different modes of self-assembly, demonstrating that control over self-assembly pathways can enable control over covalent bond formation.
[EN] SYNTHETIC RECEPTOR COMPOUNDS FOR DETECTION OF MODIFIED AMINO ACIDS IN PEPTIDES AND PROTEINS [FR] COMPOSÉS RÉCEPTEURS SYNTHÉTIQUES POUR LA DÉTECTION D'ACIDES AMINÉS MODIFIÉS DANS DES PEPTIDES ET DES PROTÉINES
Spontaneous Emergence of Self-Replicating Molecules Containing Nucleobases and Amino Acids
作者:Bin Liu、Charalampos G. Pappas、Jim Ottelé、Gaël Schaeffer、Christoph Jurissek、Priscilla F. Pieters、Meniz Altay、Ivana Marić、Marc C. A. Stuart、Sijbren Otto
DOI:10.1021/jacs.9b10796
日期:2020.3.4
suggests that the current close relationship between amino acids and nucleobases may well have extended to the origin of life. We now show how the interplay between these compound classes can give rise to new self-replicating molecules using a dynamiccombinatorialapproach. We report two strategies for the fabrication of chimeric amino acid/nucleobase self-replicating macrocycles capable of exponential
Photo-induced molecular-recognition-mediated adhesion of giant vesicles
作者:Friederike M. Mansfeld、Guoqiang Feng、Sijbren Otto
DOI:10.1039/b910197g
日期:——
Few methods currently exist for controlling vesicle–vesicle adhesion. We now report a new system, based upon a multivalent guest and an amphiphilic receptor with a photo-isomerisable anchor that can be incorporated into lipid vesicles of different sizes. Large unilamellar vesicles containing our receptor were found to aggregate upon addition of the multivalent guest, independently of photoswitching between the two conformations of the anchor. However, for giant vesicles immobilised on a platinum wire, guest-mediated adhesion only occurred upon photo-isomerisation of the anchor. This behaviour was attributed to the dynamics introduced into the system through the conformational changes caused by irradiation.
Complex Molecules That Fold Like Proteins Can Emerge Spontaneously
作者:Bin Liu、Charalampos G. Pappas、Ennio Zangrando、Nicola Demitri、Piotr J. Chmielewski、Sijbren Otto
DOI:10.1021/jacs.8b11698
日期:2019.1.30
proteins. Until now complex folded molecules are the product either of evolution or of an elaborate process of design and synthesis. We now show that molecules that fold in a well-defined architecture of substantial complexity can emerge autonomously and selectively from a simple precursor. Specifically, we have identified a self-synthesizing macrocyclic foldamer with a complex and unprecedented secondary
折叠可以赋予大分子各种特性,这从自然界的蛋白质中可以明显看出。到目前为止,复杂的折叠分子是进化或精心设计和合成过程的产物。我们现在表明,折叠成具有实质性复杂性的明确定义的结构的分子可以从简单的前体中自主和选择性地出现。具体来说,我们已经确定了一种自合成的大环折叠体,它具有复杂且前所未有的二级和三级结构,可使用动态组合化学方法从 15 个相同的肽-核碱基亚基中高度选择性地构建自身。在一步过程中,结构的折叠促使其从不同环大小的互变分子的混合物中以 95% 的产率合成。单晶 X 射线晶体学和 NMR 揭示了一种折叠模式,该模式基于复杂的非共价相互作用网络,涉及在线性序列中间隔很远的残基。这些结果确立了动态组合化学作为一种强大的方法来开发具有复杂性的折叠基序的合成分子,其复杂性远远超出了当前设计方法所能达到的范围。这些分子可以自主形成的事实意味着它们可能在比以前认为的更早的阶段在生命起源中发挥了作
Template-promoted self-replication in dynamic combinatorial libraries made from a simple building block
作者:B. Bartolec、M. Altay、S. Otto
DOI:10.1039/c8cc06253f
日期:——
We report dynamiccombinatoriallibraries made from a simple building block that is on the verge of enabling self-assembly driven self-replication. Adding a template provides a sufficient additional push yielding self-replication. Self-assembly and self-replication can emerge with building blocks that are considerably smaller than those reported thus far.
(Re-)Directing Oligomerization of a Single Building Block into Two Specific Dynamic Covalent Foldamers through pH
作者:Yulong Jin、Pradeep K. Mandal、Juntian Wu、Niklas Böcher、Ivan Huc、Sijbren Otto
DOI:10.1021/jacs.2c09325
日期:2023.2.8
oligomerization of the same buildingblock to yet other rings sizes (including a 12mer and a 13mer, accompanied by a minor amount of 14mer). This brings the total number of discrete foldamers that can be accessed from a single buildingblock to five. For a single buildingblock system to exhibit such highly diverse structure space is unique and sets this system of foldamers apart from proteins. Furthermore