type reaction of epsilon-acetylenic beta-keto esters to form highly functionalized methylenecyclopentanes are described. The observed regio-, chemo-, and stereoselectivities support a process of cycloisomerization which controls the relative stereochemistry of two contiguous stereogenic centers. An efficient route to the basic skeleton of the phyllocladane family has been achieved via a one-pot sequence
Discovery of Potent and Selective Inhibitors against Protein-Derived Electrophilic Cofactors
作者:Xie Wang、Zongtao Lin、Katelyn A. Bustin、Nate R. McKnight、William H. Parsons、Megan L. Matthews
DOI:10.1021/jacs.1c12748
日期:2022.3.30
they have remained blind spots in traditional activity-based protein profiling (ABPP) approaches that target nucleophiles. More recently, reverse-polarity (RP)-ABPP usinghydrazineprobes identified an electrophilic N-terminal glyoxylyl (Glox) group for the first time in secernin-3 (SCRN3). The biological function(s) of both the protein and Glox as a cofactor has not yet been pharmacologically validated
Rhodium-Mediated Stereoselective Polymerization of “Carbenes”
作者:Dennis G. H. Hetterscheid、Coen Hendriksen、Wojciech I. Dzik、Jan M. M. Smits、Ernst R. H. van Eck、Alan E. Rowan、Vincenzo Busico、Michele Vacatello、Valeria Van Axel Castelli、Annalaura Segre、Erica Jellema、Tom G. Bloemberg、Bas de Bruin
DOI:10.1021/ja058722j
日期:2006.8.1
stereoselective polymerization of "carbenes" from ethyl diazoacetate (EDA) to give high molecular mass poly(ethyl 2-ylidene-acetate) is described. The mononuclear, neutral [(N,O-ligand)M(I)(cod)] (M = Rh, Ir) catalytic precursors for this reaction are characterized by (among others) single-crystal X-ray diffraction. These species mediate formation of a new type of polymers from EDA: carbon-chain polymers functionalized
A simple and effective strategy for labeling cysteine sulfenic acid in proteins by utilization of β-ketoesters as cleavable probes
作者:Jiang Qian、Revati Wani、Chananat Klomsiri、Leslie B. Poole、Allen W. Tsang、Cristina M. Furdui
DOI:10.1039/c2cc17868k
日期:——
β-ketoesters are robust probes for labeling sulfenic acid (âSOH) proteins allowing quantitative cleavage of the tag for improved analysis of the labeled peptides by MS.
δ-酮酯是标记亚硫酸(âSOH)蛋白质的强效探针,可定量裂解标签,改进质谱对标记肽的分析。
METHOD OF LABELING SULFENIC ACID-CONTAINING PROTEINS AND PEPTIDES
申请人:Wake Forest University Health Sciences
公开号:US20150346209A1
公开(公告)日:2015-12-03
A method of labeling a sulfenic acid (—SOH) group of a cysteine residue in a protein or peptide, comprises contacting said protein or peptide with a beta-ketoester to covalently couple said beta-ketoester to said cysteine residue and form a beta-ketoester-labeled cysteine residue in said protein or peptide.