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• W2801241717 abstract "The thesis entitled “New DNA-Targeting Small Molecules as Potential Anticancer Agents and for in vivo Specificity toward Enhanced Silk Production” encompasses design, computational calculations, and syntheses of diverse small molecular scaffolds to explicitly target duplex and higher order DNA morphologies (G-quadruplex DNA). Some of these molecules have a potential as anticancer agents. Besides, an attempt has been made elucidate the importance of novel oligopyrrole carboxamides in the enhancement of silk yield, hence proving to a boon in the field of sericulture. The work has been divided into six chapters. Chapter 1. DNA Binding Small Molecules as Anticancer Agents Figure 1. DNA targeting by small molecules. Cancer has always been a dreadful disease and continues to attract extensive research investigations. Various targets have been identified to restrain cancer. Among these DNA happens to be the most explored one. A wide variety of small molecules, often referred to as “ligands”, has been synthesized to target numerous structural features of DNA (Figure 1). The sole purpose of such molecular design has been to interfere with the transcriptional machinery in order to drive the cancer cell toward apoptosis. The mode of action of the DNA targeting ligands focuses either on the sequence-specificity by groove binding and strand cleavage, or by identifying the morphologically distinct higher order structures like that of the G-quadruplex DNA. Chapter 2. Ligand 5, 10, 15, 20-tetra(N-methyl-4-pyridyl)porphine (TMPyP4) Prefers the Parallel Propeller-type Human G-Quadruplex DNA over its other Polymorphs The binding of ligand 5, 10, 15, 20-tetra(N-methyl-4-pyridyl)porphine (TMPyP4) with telomeric and genomic G-quadruplex DNA has been extensively studied. However, a comparative study of interactions of TMPyP4 with different conformations of human telomeric G-quadruplex DNA, namely parallel propeller-type (PP), antiparallel basket-type (AB), and mixed hybrid-type (MH) G-quadruplex DNA has not been done. We considered all the possible binding sites in each of the G-quadruplex DNA structures and docked TMPyP4 to each one of them. The resultant most potent sites for binding were analyzed from the mean binding free energy of the complexes. Molecular dynamics simulations were then carried out and analysis of the binding free energy of the TMPyP4-G-quadruplex complex showed that the binding of TMPyP4 with parallel propeller-type G-quadruplex DNA is preferred over the other two G-quadruplex DNA conformations. The results obtained from the change in solvent excluded surface area (SESA) and solvent accessible surface area (SASA) also support the more pronounced binding of the ligand with the parallel propeller-type G-quadruplex DNA (Figure 2). Figure 2. Ligand TMPyP4 prefers parallel propeller-type G-quadruplex DNA morphology. Chapter 3. A Theoretical Analysis on the Selective Stabilization of Intermolecular G-quadruplex RNA with a bis-Benzimidazole Ligand EtBzEt over TMPyP4 in K+ Environment Ever since the discovery of…" @default.
• W2801241717 created "2018-05-17" @default.
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• W2801241717 date "2014-01-01" @default.
• W2801241717 modified "2023-09-27" @default.
• W2801241717 title "New DNA-Targeting Small Molecules as Potential Anticancer Agents and for in vivo Specificity toward Enhanced Silk Production" @default.
• W2801241717 hasPublicationYear "2014" @default.
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