Israel Journal of Chemistry最新文献

The cover picture shows a cyclic voltammogram and catalytically active intermediates, highlighting the importance of a rationale for innovations in the rapidly evolving field of molecular electrosynthesis. Also, as a product structure, a C7 substituted indole, derived through electrocatalysis, is depicted.

Nucleic acids are considered as fundamental molecules of living systems, which serve as universal genetic information messengers and repositories. To uncover the multifaceted aspects of nucleic acid function and metabolism within cells, labeling has become indispensable. This labeling technique enables the visualization, isolation, characterization, and even quantification of specific nucleic acid species. This review delves into cellular metabolic approaches for nucleic acid labeling, wherein enzymatic steps are employed to introduce nucleic acid modifications before conjugation with a label for detection or isolation. The discussion begins with metabolic labeling for DNA, RNA with various reactive groups and post-transcriptional RNA labeling for RNA methylation and acetylation sites, emphasizing recent advancements in the field and then, we spotlighted pertinent applications for cellular imaging and sequencing. of labeling.

The complexity of eukaryotic organisms is intricately tied to transcriptome-level processes, notably alternative splicing and the precise modulation of gene expression through a sophisticated interplay involving RNA-binding protein (RBP) networks and their RNA targets. Recent advances in our understanding of the molecular pathways responsible for this control have paved the way for the development of tools capable of steering and managing RNA regulation and gene expression. The fusion between a rapidly developing understanding of endogenous RNA regulation and the burgeoning capabilities of CRISPR-Cas and other programmable RBP platforms has given rise to an exciting frontier in engineered RNA regulators. This review offers an overview of the existing toolkit for constructing synthetic RNA regulators using programmable RBPs and effector domains, capable of altering RNA sequence composition or fate, and explores their diverse applications in both basic research and therapeutic contexts.

The biological role of the fat mass and obesity-associated protein (FTO) in the initiation and progress of acute myeloid leukemia (AML) has been elucidated, and several representative FTO inhibitors can markedly suppress the proliferation of AML cells. We previously developed FTO inhibitors including FB23. In this study, we adopted bioisosteric replacement of the intramolecular hydrogen bond in FB23 with a sulfur-oxygen interaction to generate a series of 2-(arylthio)benzoic acid FTO inhibitors and established their structure-activity relationships. Compound 8c was the most potent 2-(arylthio)benzoic acid FTO inhibitor with an IC₅₀ value of 0.3±0.1 μM, which was comparable with that of FB23 in vitro. To enhance the antiproliferative effects in AML cell lines, we applied a prodrug strategy and prepared some esters. 7l, the methyl ester of 8l, exerted a superior inhibitory effect on a panel of AML cancer cell lines. Additionally, 7l treatment notably increased global m⁶A abundance in AML cells. Collectively, our data suggest that 2-(arylthio)benzoic acid may be a new lead compound for inhibition of FTO, and the prodrug analog exhibit potential in the treatment of AML.

The widespread involvement of 5-formylcytosine f⁵C RNA in gene function regulation and its impact on crucial life processes like cell differentiation, embryonic development, and disease development underscores the significance of detecting this specific base modification. This detection holds great importance for basic epigenetics research and the early diagnosis and pathogenesis research of various diseases. This review aims to summarize recent research progress in f⁵C detection methods using selective chemical labeling, with the hope of aiding future research endeavors.

Sequencing for RNA modifications with the nanopore direct RNA sequencing platform provides ionic current levels, helicase dwell times, and base call data that differentiate the modifications from the canonical form. Herein, model RNAs were synthesized with site-specific uridine (U) base modifications that enable the study of increasing an alkyl group size, halogen identity, or a change in base acidity to impact the nanopore data. The analysis concluded that increases in alkyl size trend with greater current blockage but a similar change in base-call error was not found. The addition of a halogen series to C5 of U revealed that the current levels recorded a trend with the water-octanol partition coefficient of the base, as well as the base call error. Studies with U modifications that are deprotonated (i. e., anionic) under the sequencing conditions gave broad current levels that influenced the base call error. Some modifications led to helicase dwell time changes. These insights provide design parameters for modification-specific chemical reagents that can shift nanopore signatures to minimize false positive reads, a known issue with this sequencing approach.