Correction to “Display Selection of Exotic Macrocyclic Peptides Expressed Under a Radically Reprogrammed 23 Amino Acid Genetic Code”
作者:Toby Passioura、Wenyu Liu、Daniel Dunkelmann、Takashi Higuchi、Hiroaki Suga
DOI:10.1021/jacs.9b06806
日期:2019.7.24
macrocyclic peptides, which was screened for affinity to IL6R. (c and d) αIL6R-2 and αIL6R-2 were synthesized by solidphasepeptidesynthesis as shown. Noncanonical structural features are highlighted in red. Association rate (ka) dissociation rate (kd) and dissociation constant (KD) for the interaction of each peptide with IL6R are reported as mean ± standard deviation. The Supporting Information
Page 11553.发布后,我们意识到图2面板c和d中的多个立体中心在图像生成过程中已经颠倒了,并且在图形摘要中也再现了相同的错误。下面修订的图形显示了正确的立体化学。同样,在“支持信息”中的图S3中,错误地描绘了多个立体中心。现在,此处提供了更新的支持信息文件中的正确数字。图2.核糖体合成和极高多样性的极性降低的大环肽文库的筛选,用于IL6R的配体。(a)使用规范化大肠杆菌进行重编程翻译的密码子表(仅NNS密码子,N = U,A,C或G; S = C或G)密码子表(左)进行比较。颜色编码指示相对于Gly的疏水性(ΔmiLogP)。非蛋白氨基酸结构如图1c所示。CLAC-酪氨酸= Ñ -chloroacetyl-升-酪氨酸,*表示CLAC-酪氨酸仅翻译为起始的N端残基。(b)翻译由AUG起始密码子(重新编程为CLAc-Tyr的8或9 NNS密码子序列,编码UGC密码子的Cys和(Gly-
Display Selection of Exotic Macrocyclic Peptides Expressed under a Radically Reprogrammed 23 Amino Acid Genetic Code
作者:Toby Passioura、Wenyu Liu、Daniel Dunkelmann、Takashi Higuchi、Hiroaki Suga
DOI:10.1021/jacs.8b03367
日期:2018.9.19
standard geneticcode. In the present study, we have demonstrated ribosomal expression of exoticmacrocyclicpeptidesunder a radicallyreprogrammed, relatively hydrophobic, geneticcode, comprising 12 proteinogenic and 11 nonproteinogenic aminoacids. Screening of this library for affinity to the interleukin-6 receptor (IL6R) as a case study successfully identified exoticmacrocyclicpeptide ligands
<i>N</i>‐Boc‐Protected α‐Amino Acids by 1,3‐Migratory Nitrene C(sp<sup>3</sup>)−H Insertion
作者:Bing Zhou、Chen‐Xi Ye、Eric Meggers
DOI:10.1002/ejoc.202300296
日期:2023.7.8
Abstract
N‐Boc‐protected α‐amino acids are synthesized in two steps from linear or branched carboxylic acid feedstocks. In the first step, the carboxylic acid is coupled with tert‐butyl aminocarbonate (BocNHOH) to generate azanyl ester (acyloxycarbamate) RCO2NHBoc. In the second step, this azanyl ester undergoes a stereocontrolled iron‐catalyzed 1,3‐nitrogen migration to generate the N‐Boc‐protected non‐racemic α‐amino acid. This straightforward protocol is applicable to the catalytic asymmetric synthesis of α‐monosubstituted α‐amino acids with aryl, alkenyl, and alkyl side chains. Furthermore, α,α‐disubstituted α‐amino acids are accessible in an enantioconvergent fashion from racemic carboxylic acids. The new method is also advantageous for the synthesis of α‐deuterated α‐amino acids. N‐Boc‐protected α‐amino acids synthesized using this two‐step protocol are ready‐to‐use building blocks.
Enhancement of drug affinity for cell membranes by conjugation with lipoamino acids. I. Synthesis and biological evaluation of lipophilic conjugates of tranylcypromine
作者:Rosario Pignatello、Antonina Puleo、Salvatore Guccione、Giuseppina Raciti、Rosaria Acquaviva、Agatina Campisi、Cinzia A. Ventura、Giovanni Puglisi
DOI:10.1016/j.ejmech.2005.05.009
日期:2005.11
Conjugation with lipoamino acids (LAAs) increases the lipophilicity of drug molecules. Because of their amphipatic nature, they also provide the conjugated drugs a 'membrane-like character', capable to facilitate their interaction with and penetration through cell membranes and biological barriers. To study such a feature, our aim is to collect experimental and computational data using a novel series of lipophilic conjugates between a model drug (tranylcypromine (TCP)) and LAA residues containing a short, a medium or a long alkyl side chain (C-4 to C-16), to provide a wide range of lipophilicity. For comparison, a corresponding set of amides of TCP with alkanoic or fatty acids was prepared and characterized. Their in vitro monoamine oxidase inhibitory activity also tested. (c) 2005 Elsevier SAS. All rights reserved.
Disclosing New Inhibitors by Finding Similarities in Three-Dimensional Active-Site Architectures of Polynuclear Zinc Phospholipases and Aminopeptidases