CRISPR (clustered regularly interspaced short palindromic repeats) systems have been established as valuable genome-editing tools. Controlling CRISPR systems has high biological significance and this field has garnered intense interest. There is a considerable need for simple approaches with no need for protein engineering. The CRISPR systems usually require a guide RNA (gRNA) moiety to recruit and direct the nuclease complexes. In this respect, the ninhydrin (1,2,3-indantrione monohydrate) seems to have considerable potential, as yet unexploited, for modifying gRNA. In this study, ninhydrin chemistry is explored for reversible postsynthetic modification of gRNA molecules. It is further shown that ninhydrin chemistry is efficient in modulating two important CRISPR systems. Thus, ninhydrin chemistry exhibits potential applications in future chemical biology studies.
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http://dx.doi.org/10.1002/advs.201903770 | DOI Listing |
Int J Mol Sci
December 2024
Department of Chemistry and Biochemistry, Loyola University Chicago, 1032 West Sheridan Road, Chicago, IL 60660, USA.
Based on the inhibitory potencies from earlier reported tetrazole thioether analogs, we now describe the synthesis and inhibition of pyrazole-based inhibitors of -succinyl-l,l-2,6-diaminopimelic acid desuccinylase (DapE) from (DapE). The most potent pyrazole analog bears an aminopyridine amide with an IC of 17.9 ± 8.
View Article and Find Full Text PDFChem Asian J
December 2024
Organic and Bio-Organic Chemistry laboratory, CSIR-Central Leather Research Institute (CSIR-CLRI), Chennai, 600020, India.
The efficient pentaflurophenol-catalyzed Pictet-Spengler cyclization was carried out which led to the formation of spirobenzazepinoindole. This article examines the methods and modifications of Pictet-Spengler cyclization in the synthesis of intricate organic compounds, emphasizing its significance in drug discovery and development. This reaction generally entails the condensation of an amine with an aldehyde or ketone, succeeded by an intramolecular cyclization step catalyzed by pentafluorophenol, an alternate for metal-mediated catalysts due to its facile characteristics which render it an invaluable asset in organic synthesis and catalysis.
View Article and Find Full Text PDFOrg Biomol Chem
January 2025
Department of Chemistry, University of Calcutta, 92, A. P. C. Road, Kolkata 700009, India.
Room temperature stirring of a mixture of chalcogenated arylhydrazones and ninhydrin in dichloromethane (DCM) in the presence of acid leads to the formation of pyrazole-fused isocoumarins, substituted with a diarylsulphide/diarylselenide moiety. On the other hand, refluxing the same mixture in the protic polar solvent ethanol with acid produces diarylsulphide/diarylselenide containing ninhydrin hydrazones. Further study reveals that, like ninhydrin, isatin can also generate the corresponding chalcogenated hydrazones at the C-3 position under similar reaction conditions.
View Article and Find Full Text PDFAquat Toxicol
December 2024
Department of Chemistry, Faculty of Agriculture and Forestry, University of Warmia and Mazury in Olsztyn, Pl. Łódzki 4,10-727 Olsztyn, Poland.
Chemical substances such as drugs pose a threat to the environment. One of the substances recorded in soil and water is chlortetracycline, an antibiotic used in veterinary medicine. Plants exposed to such xenobiotics show changes in the content of biogenic amines.
View Article and Find Full Text PDFBiomed Chromatogr
December 2024
Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee, India.
The synthesis of optically active compounds requires determination of ee, er, and enantiomeric purity. The aim of the present paper is to review the synthesis of several chiral derivatizing reagents (CDRs) in a rational manner, which were successful for the separation and isolation of enantiomers of a variety of active pharmaceutical ingredients and other important and useful racemates. Besides, the application of (i) certain enantiomerically pure amines, either directly or by incorporating each of them as chiral auxiliary in difluorodinitrobenzene or cyanuric chloride moieties to construct the CDR, (ii) (S)-ketoprofen and (S)-levofloxacin as chiral platforms, and (iii) a few isothiocyanates, have been suitably included.
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