NUCLEIC ACIDS Nucleic acids are the repository of genetic information for life forms on planet Earth. They consist of linear molecules containing repeat units of: sugar (ribose or deoxyribose) - base
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XNA marks the spot
The new field of synthetic genetics has made significant advances during the past four years, both to create artificial and modified nucleic acids, and to investigate their structural and functional properties. This rapid progress promises to improve our understanding of the origins and fundamental basis of life, and to enhance the application of this knowledge in the search for new therapeutic...
متن کاملInfluence of nucleotide modifications at the C2’ position on the Hoogsteen base-paired parallel-stranded duplex of poly(A) RNA
Polyadenylate (poly(A)) has the ability to form a parallel duplex with Hoogsteen adenine:adenine base pairs at low pH or in the presence of ammonium ions. In order to evaluate the potential of this structural motif for nucleic acid-based nanodevices, we characterized the effects on duplex stability of substitutions of the ribose sugar with 2'-deoxyribose, 2'-O-methyl-ribose, 2'-deoxy-2'-fluoro-...
متن کاملNucleic Acids
The first isolation of what we now refer to as DNA was accomplished by Johann Friedrich Miescher circa 1870. He reported finding a weakly acidic substance of unknown function in the nuclei of human white blood cells, and named this material "nuclein". A few years later, Miescher separated nuclein into protein and nucleic acid components. In the 1920's nucleic acids were found to be major compon...
متن کاملCooperativity in biological systems
Living organisms can sense and respond to external and internal stimuli. Response isdemonstrated in many forms including modulation of gene expression profiles, motility,secretion, cell death, etc. Nevertheless, all forms share a basic property: they depend on sensingsmall changes in the concentration of an effector molecule or subtle conformational changes ina protein and invoking the appropri...
متن کاملCellular Morphology and Immunologic Properties of Escherichia coli Treated With Antimicrobial Antisense Peptide Nucleic Acid
Background & Objectives: Antisense peptide nucleic acids (PNA) that target growth essential genes show potent bactericidal properties without cell lysis. We considered the possibility that whether PNA treatment influence the bacteria total nucleic acids content and apply approach to develop a new delivery system to Dendritic cells (DCs). DCs are the most potent antigen presenting cells in th...
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