Quantitative Chiroptical Sensing of Free Amino Acids, Biothiols, Amines, and Amino Alcohols with an Aryl Fluoride Probe
作者:F. Yushra Thanzeel、Archita Sripada、Christian Wolf
DOI:10.1021/jacs.9b07588
日期:2019.10.16
present a small molecular probe that smoothly reacts with amino acids and biothiols in aqueous solution and thereby generates distinct chiroptical responses to accomplish this task. The achiral sensor is readily available, inexpensive and suitable for chiroptical analysis of each of the 19 standard amino acids, biothiols, aliphatic and aromatic amines and ami-no alcohols. The sensing method is operationally
A platinum Chugaev complex was synthesised and fully characterized by multinuclear NMR spectroscopy and X-ray crystallography. This cis bis acyclic diamino carbene complex acts as a cytotoxic compound and behaves as a cisplatin equivalent by interacting with supercoiled DNA and thiols. Stability of the ligand is also discussed.
我们合成了一种铂 Chugaev 复合物,并通过多核核磁共振光谱和 X 射线晶体学对其进行了全面鉴定。这种顺式双无环二氨基碳络合物是一种细胞毒性化合物,通过与超螺旋 DNA 和硫醇相互作用,表现出与顺铂等效的作用。此外,还讨论了配体的稳定性。
β-Carbonyl sulfonium enables cysteine-specific bioconjugation for activity-based protein profiling in live cells
labeling methods for proteins are highly researched. Herein, we introduced β-carbonyl sulfonium compounds for selective cysteine modification in proteins within biological systems. Structural tuning led to sulfonium-based probes with high reactivity and selectivity. These probes show excellent biocompatibility, cell uptake, and specificity towards cysteine profiling in live cells.
Indoleamine 2,3-Dioxygenase Is the Anticancer Target for a Novel Series of Potent Naphthoquinone-Based Inhibitors
作者:Sanjeev Kumar、William P. Malachowski、James B. DuHadaway、Judith M. LaLonde、Patrick J. Carroll、Daniel Jaller、Richard Metz、George C. Prendergast、Alexander J. Muller
DOI:10.1021/jm7014155
日期:2008.3.1
Indoleamine 2,3-dioxygenase (IDO) is emerging as an important new therapeutic target for the treatment of cancer, chronic viral infections, and other diseases characterized by pathological immune suppression. While small molecule inhibitors of IDO exist, there remains a dearth of high-potency compounds offering in vivo efficacy and clinical translational potential. In this study, we address this gap by defining a new class of naphthoquinone-based IDO inhibitors exemplified by the natural product menadione, which is shown in mouse tumor models to have similar antitumor activity to previously characterized IDO inhibitors. Genetic validation that IDO is the critical in vivo target is demonstrated using IDO-null mice. Elaboration of menadione to a pyranonaphthoquinone has yielded low nanomolar potency inhibitors, including new compounds which are the most potent reported to date (K-i = 61-70 nM). Synthetic accessibility of this class will facilitate preclinical chemical-genetic studies as well as further optimization of pharmacological parameters for clinical translation.
Determination of plasma levels of the active thiol form of the direct-acting PrC-210 ROS-scavenger using a fluorescence-based assay