Efficient synthesis of longer Aβ peptides via removable backbone modification
作者:Chao Zuo、Shan Tang、Yan-Yan Si、Zhipeng A. Wang、Chang-Lin Tian、Ji-Shen Zheng
DOI:10.1039/c6ob00712k
日期:——
Longer amyloid-beta (Aβ) peptides (43 to 49 amino acids) play essential roles in the pathology of Alzheimer's disease (AD). The difficulty in the preparation of longer Aβ peptides is still an obstacle to elucidate their roles in AD. Herein we report a robust and efficient strategy for the chemical synthesis of longer Aβ peptides (Aβ48 and Aβ49). A key feature of this method is the installation of removable
Design and synthesis of novel dual-cyclic RGD peptides for αvβ3 integrin targeting
作者:Junjie Liu、Xiaozhong Cheng、Xiaobo Tian、Dongliang Guan、Jiwei Ao、Zhimeng Wu、Wei Huang、Zhiping Le
DOI:10.1016/j.bmcl.2019.01.043
日期:2019.4
The specific binding of RGDcyclicpeptide with integrinαvβ3 attracts great research interest for tumor-targeting drug delivery. Herein, we designed and synthesized a series of dual-ring RGD-peptide derivatives as a drug carrier for αvβ3 targeting. Three novel peptides showed excellent cell adhesion inhibition effect, in which, P3 exhibited 7-fold enhancement in IC50 compared with cyclo(RGDfK). Drug-loaded
Convergent Chemical Synthesis of Proteins by Ligation of Peptide Hydrazides
作者:Ge-Min Fang、Jia-Xing Wang、Lei Liu
DOI:10.1002/anie.201203843
日期:2012.10.8
together: A generally applicable strategy for convergent chemicalsynthesis of proteins from multiple peptide segments is developed on the basis of the ligation of peptidehydrazides. The peptidehydrazide intermediates can be made at low cost and the new strategy is used in the synthesis of the 142 residue model protein RpS25 from six peptide segments. PG=protecting group.
Metabolic Profiling of Bacteria by Unnatural C-terminated<scp>D</scp>-Amino Acids
作者:Sean E. Pidgeon、Jonathan M. Fura、William Leon、Morgan Birabaharan、Dmitri Vezenov、Marcos M. Pires
DOI:10.1002/anie.201409927
日期:2015.5.18
Bacterialpeptidoglycan is a mesh‐like network comprised of sugars and oligopeptides. Transpeptidases cross‐link peptidoglycan oligopeptides to provide vital cellwall rigidity and structural support. It was recently discovered that the same transpeptidases catalyze the metabolic incorporation of exogenous D‐amino acids onto bacterialcell surfaces with vast promiscuity for the side‐chain identity
Dissecting mechanism of coupled folding and binding of an intrinsically disordered protein by chemical synthesis of conformationally constrained analogues
Non-canonical α-methyl amino acids were incorporated at various sites in the sequence of intrinsically disordered activation domain from the p160 transcriptional co-activator (ACTR) to facilitate the formation of α-helical structures. Kinetic and thermodynamic data confirm the induced fit mechanism of complex formation between the synthesized ACTR variants and the nuclear co-activator binding domain