Can selenenyl sulfides be a substrate of glutathione reductase enzyme? A theoretical insight.

Glutathione reductase (GR) catalyzes the reduction of glutathione disulfide (GSSG) to glutathione. As selenium is a congener of sulfur, the possibility of reducing selenenyl sulfide (RSeSG) at the catalytic site of GR has been investigated using density functional theory. Calculations on the redox potential and the Se-S bond strength of some studied RSeSG compounds with a phenyl selenide backbone suggested that the unsubstituted and amine-based selenenyl sulfide intermediates could have a promising tendency to be reduced at the catalytic site of GR.

Combined theoretical and experimental insights on DNA and BSA binding interactions of Cu(ii) and Ni(ii) complexes along with the DPPH method of antioxidant assay and cytotoxicity studies.

This present study delineates the syntheses, detailed characterization and anti-proliferative potential against SiHa (cervical cancer cell) of two mononuclear complexes of Cu(ii) and Ni(ii) using a Schiff base ligand (L) derived from 2-hydroxybenzaldehyde and -methyl-propane 1,3-diamine. The crystallographic results show the centro-symmetric space group of orthorhombic nature () for Cu(ii) complex (1) where the central Cu(ii) has an inversion center symmetry with six co-ordinations resulting in a distorted octahedral geometry. Whereas, in complex (2), the two independent Ni(ii) atoms present in the special position within version symmetry and form a distorted geometry of octahedral nature with six coordinations.

Revisiting salicylidene-based anion receptors.

Several salicylidene-based colorimetric and fluorimetric anion sensors are known in the literature. However, our H-NMR experimental results (in DMSO-d) showed hydrolysis of imine (-N[double bond, length as m-dash]CH-) bonds in salicylidene-based receptors (SL, CL1 and CL2) in the presence of quaternary ammonium salts (-BuN) of halides (Cl and Br) and oxo-anions (HPO , HSO and CHCOO). The mono-salicylidene compound CL1 showed the most extensive -N[double bond, length as m-dash]CH- bond hydrolysis in the presence of anions.

Tetraphenylethene Derivatives Modulate the RNA Hairpin-G-Quadruplex Conformational Equilibria in Proto-oncogenes.

RNA G-quadruplex (GQs) sequences in 5'-UTRs of certain proto-oncogenes co-localize with hairpin (Hp) forming sequences resulting in intramolecular Hp-GQ conformational equilibria, which is suggested to regulate cancer development and progression. Thus, regulation of Hp-GQ equilibria with small molecules is an attractive but less explored therapeutic approach. Herein, two tetraphenylethene (TPE) derivatives, TPE-Py and TPE-MePy, were synthesized and their effect on Hp-GQ equilibrium was explored.

The curious case of salicylidene-based fluoride sensors: chemosensors or chemodosimeters or none of them.

Fluoride-ion induced hydrolysis of imine (C[double bond, length as m-dash]N) bonds has not been documented in the literature, in spite of the numerous salicylidene-based fluoride sensors studied over the years. Herein, we have proposed a mechanism for fluoride-ion induced hydrolysis of salicylidene compounds (SL and CL1-3) based on H-NMR, F-NMR, LC-MS and UV-vis spectroscopy experiments.

The Supramolecular Self-Assembly of Aminoglycoside Antibiotics and their Applications.

Aminoglycosides, a class of antibiotics that includes gentamicin, kanamycin, neomycin, streptomycin, tobramycin and apramycin, are derived from various species. Despite the significant increase in the antibacterial resistant pathogens, aminoglycosides remain an important class of antimicrobial drugs due to their unique chemical structure which offers a broad spectrum of activity. The modification of antibiotics and their subsequent use in supramolecular chemistry is rarely reported.

Meet the Board of : Sheshanath V. Bhosale.

Sheshanath V. Bhoslae received his PhD from Freie University Berlin (Germany) in supramolecular chemistry under the supervision of Prof. J.

Functionalized Quinoxaline for Chromogenic and Fluorogenic Anion Sensing.

This Review article provides a comprehensive analysis of recent examples reported in the field of quinoxaline-based chromogenic and fluorogenic chemosensors for inorganic anions such as fluoride, cyanide, acetate, and phosphate, as well as their utility in biomolecular science. It commences with a discussion of the various structural motifs such as quinoxaline-based oligopyrroles, polymers, sulfonamides, cationic receptors, and miscellaneous receptors bearing mixed recognition sites in the same receptor. Advances are discussed in depth, where the focus of this review is to tackle mainly solution state anion sensing utilizing quinoxaline-based receptors using different spectroscopic techniques with reference to anion selectivity by colorimetric and fluorescence response.

Co-selection of multi-antibiotic resistance in bacterial pathogens in metal and microplastic contaminated environments: An emerging health threat.

Misuse/over use of antibiotics increases the threats to human health since this is a main reason behind evolution of antibiotic resistant bacterial pathogens. However, metals such as mercury, lead, zinc, copper and cadmium are accumulating to critical concentration in the environment and triggering co-selection of antibiotic resistance in bacteria. The co-selection of metal driven antibiotic resistance in bacteria is achieved through co-resistance or cross resistance.

Characterization of a new virulent phage ϕMC1 specific to Microbulbifer strain CMC-5.

Microbulbifer strain CMC-5, isolated from decomposing seaweeds degrades agar, alginate, carrageenan, chitin, carboxymethyl cellulose and xylan. Using bacterial strain CMC-5 as host, a novel virulent phage, designated ϕMC1 was isolated from the coast of Goa, India. Although ϕMC1 demonstrated cross infectivity with type species of Microbulbifer such as M.

Halophilic Aspergillus penicillioides from athalassohaline, thalassohaline, and polyhaline environments.

Aspergillus penicillioides is a true halophile, present in diverse econiches - from the hypersaline athalassohaline, and thalassohaline environments, to polyhaline systems, and in different geographical locations. Twenty seven isolates from these environments, were seen to be moderate halophiles, euryhaline in nature. They had an obligate need of a low aw and were unable to grow on a regular defined medium such as Czapek Dox Agar, as well as on varied nutrient rich agar media such as Malt Extract, Potato Dextrose and Sabouraud Agar; however, growth was obtained on all these media when amended with 10% solar salt.