Solid-Phase Staudinger Ligation from a Novel Core-Shell-Type Resin: A Tool for Facile Condensation of Small Peptide Fragments
作者:Hanyoung Kim、Jin Ku Cho、Saburo Aimoto、Yoon-Sik Lee
DOI:10.1021/ol0530629
日期:2006.3.1
[reaction: see text] Solid-phase Staudinger ligation of small peptides was performed on a novel core-shell-type resin. Solid-phase Staudinger ligation was mediated by synthetic solid-supported phosphinothiol, which was readily prepared by a straightforward synthetic route. This protocol afforded final peptide products in excellent yields and purities and thus could provide the opportunity to facilitate
[GRAPHICS]Pure alpha -azido acids were prepared using an efficient diazo transfer method followed by buffered workup, These building blocks were used to prepare small peptides on Wang resin by two approaches, Peptides prone to diketopiperazine formation were prepared in good yields by coupling acids to resin bound iminophosphoranes during Fmoc-Wang synthesis, The iminophosphoranes can also be hydrolyzed under neutral conditions to provide unprotected amines ready for further coupling.
On-resin cyclization of peptide ligands of the Vascular Endothelial Growth Factor Receptor 1 by copper(I)-catalyzed 1,3-dipolar azide–alkyne cycloaddition
Cyclic peptides were obtained, on-resin, by the copper (1) catalysed 1,3-dipolar cycloaddition of azides and alkynes. The reaction led exclusively to the formation of the expected cyclomonomeric products which acted as ligands of the Vascular Endothelial Growth Factor receptor 1. (c) 2007 Elsevier Ltd. All rights reserved.
Applying Small Molecule Microarrays and Resulting Affinity Probe Cocktails for Proteome Profiling of Mammalian Cell Lysates
作者:Haibin Shi、Mahesh Uttamchandani、Shao Q. Yao
DOI:10.1002/asia.201100523
日期:2011.10.4
present in the sample. The brightest microarray hits were converted to affinity‐based probes (AfBPs) using convenient, 1‐step “click” chemistry with benzophenone from the relevant building blocks. Pull‐down/mass spectrometric analysis with these probes (individuals or cocktail) yielded putative protein targets that include well‐known aspartic proteases, such as cathepsin D which is a clear marker for
Secondarystructures tend to be recognizable because they have repeating structural motifs, but mimicry of these does not have to follow such well‐defined patterns. Bioinformatics studies to match side‐chain orientations of a novel hydantoin triazole chemotype (1 ) to protein‐protein interfaces revealed it tends to align well across parallel and antiparallel sheets, like rungs on a ladder. One set