A novel amidation strategy using electrophilic sulfonium, which is soluble and stable in aqueous conditions, was developed. The sulfoniums could activate thioacid and carboxyl acid to efficiently react with amines to afford amides. This method enables applications in amidation in both aqueous media and solid-phase peptide synthesis, peptide/protein modifications, and reactive lysines of a proteome
A Convenient Preparation of Bis(4-methoxyphenyl)methanethiol and Its Application in the Synthesis of Biotin Thioacid
作者:Tzyy-Chao Chou、Yu-Ling Hsu、Lee-Chiang Lo
DOI:10.1002/jccs.201300664
日期:2014.6
We have established a facile protocol for the preparation of bis(4‐methoxyphenyl)methanethiol (4). Thiol 4 was used to prepare biotin thioester 7 which was later subjected to acidolysis to afford biotinthioacid (1b) in high yield. Compound 1b represents a new biotinylating reagent worth exploring and its spectral data was reported for the first time.
Biomolecular Assemblies Combining Two Orthogonal Copper-Mediated Ligations in a One-Pot Reaction
作者:Adrien Grassin、Michaël Claron、Didier Boturyn
DOI:10.1002/chem.201500293
日期:2015.4.13
The access to multifunctional biomolecular compounds involves multistep reactions usually with a complicated protection scheme and lengthy separation processes. The development of a strategy combining several orthogonalligations is highly desirable. Herein, we introduce a new method that involves two orthogonal copper‐mediated ligations of azide with alkyne, and amine with thioacid. We established
Polyphenols, especially catechol-type polyphenols, exhibit lysyl oxidase-like activity and mediate oxidativedeamination of lysine residues in proteins. Previous studies have shown that polyphenol-mediated oxidativedeamination of lysine residues can be associated with altered electrical properties of proteins and increased crossreactivity with natural immunoglobulin M antibodies. This interaction
多酚,尤其是儿茶酚型多酚,表现出赖氨酰氧化酶样活性并介导蛋白质中赖氨酸残基的氧化脱氨。先前的研究表明,多酚介导的赖氨酸残基氧化脱氨基作用可能与蛋白质电特性的改变以及与天然免疫球蛋白 M 抗体的交叉反应性增加有关。这种相互作用表明氧化蛋白可以充当先天抗原并引发先天免疫反应。然而,氧化脱氨基赖氨酸残基的结构基础仍不清楚。在本研究中,为了建立赖氨酸氧化的化学过程,我们表征了通过将赖氨酸类似物 N-生物素基-5-氨基戊胺与含有赖氨酰氧化酶的蛋壳膜一起孵育而获得的氧化产物,并鉴定了平衡的独特六元环 2-哌啶醇衍生物。以开环产物(醛)为主要产物。通过监测这些醛-2-哌啶醇产物,我们评估了多酚的赖氨酰氧化酶样活性。我们还观察到,在铜离子存在下,该反应是由一些多酚,特别是邻二酚型多酚介导的。有趣的是,天然免疫球蛋白 M 单克隆抗体将这些醛-2-哌啶醇产物识别为先天表位。这些发现确立了氧化赖氨酸动态平衡的存
Macrocyclic peptides and derivatives thereof with opioid activity
申请人:University of Florida Research Foundation, Incorporated
公开号:US11325944B2
公开(公告)日:2022-05-10
The invention relates to macrocyclic peptides and pharmaceutical compositions thereof. The invention further relates to pharmaceutical compositions for modulating opioid receptor activity.