Towards Functional Peptide-Based Supramolecular Structures

基于功能肽的超分子结构 受天然复杂蛋白质系统的启发，我们的研究计划旨在开发以多肽为分子框架的功能性超分子结构。在下一个资助期内，我们建议在四个方面作出努力： 1.使用人工离子通道作为传感装置 我们将继续我们的发展冠醚肽为基础的离子通道的传感设备。将在N-末端位置引入几种生物识别元件以研究并最终检测特定生物标志物和细胞的存在。 2.制备氟化通道和纳米孔 我们将合成氟化螺旋肽，并研究它们在氟-氟相互作用的驱动下自组装成新型超分子结构。这样的超结构将产生氟内衬通道和纳米孔。我们打算研究这些氟化通道的膜离子转运特性，以了解离子转运所必需的结构特征。 3.开发抗菌肽纳米结构 为了开发针对耐药菌的新型有效抗菌剂，我们使用了基于简单的14残基肽的从头方法。我们建议系统地设计这种具有特定功能基团的模型肽，并研究其对重要病原体的抗菌活性。将评价末端位置和序列中的修饰对生物活性的影响。 4.水中仿生超分子催化 为了有效地催化工业相关的有机转化在水中，我们建议合成各种肽结构，可以作为超分子催化剂，从而模仿天然酶。我们将研究几个肽系统，从小的刚性环肽，构象偏向寡肽。不同的转换将作为模型反应进行研究。影响效率的因素将被确定，目标是为开发用于水中各种转化的仿生催化剂制定设计原则。

Towards Functional Peptide-Based Supramolecular Structures Inspired by natural sophisticated proteic systems, our research program aims at developing functional supramolecular structures exploiting polypeptide as molecular framework. For the next grant period, we propose to devote our efforts into four areas: 1. Use artificial ion channels as sensing devices We will pursue our development of crown ether peptide-based ion channels towards sensing devices. Several biological recognition elements will be introduced at the N-terminal position to study and eventually to detect the presence of specific biomarkers and cells. 2. Preparing fluorinated channels and nanopores We will synthesize fluorinated helical peptides and study their self-assembly into novel supramolecular architectures driven by fluorine-fluorine interactions. Such superstructures will create fluor-lined channels and nanopores. We intend to study membrane ion transport properties of those fluorinated channels to understand the structural features essential for ion translocation. 3. Developing antimicrobial peptide nanostructures Towards novel and efficient antimicrobials against resistant bacteria, we have used a de novo approach based on a simple 14 residue peptide. We propose to engineer systematically this model peptide with specific functional groups and to study their antimicrobial activities towards important pathogens. Modifications at terminal positions and in the sequence will be evaluated with respect to their impact on bioactivity. 4. Biomimetic supramolecular catalysis in water To catalyze efficiently industrially relevant organic transformations in water, we propose to synthesize a variety of peptide structures that can acts as supramolecular catalysts, hence mimicking natural enzymes. We will investigate several peptidic systems; from small rigid cyclic peptides, to conformationally biased oligopeptides. Different transformations will be studied as model reactions. Factors influencing efficiency will be identified with the goal of delineating design principles for developing biomimetic catalysts for a huge variety of transformations in water.