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Nucleic Acid Structure01:25

Nucleic Acid Structure

The pentose sugar in DNA is deoxyribose, while in RNA the pentose sugar is ribose. The difference between the sugars is the presence of the hydroxyl group on the ribose's second carbon and a hydrogen on the deoxyribose's second carbon. The phosphate residue attaches to the hydroxyl group of the 5′ carbon of one sugar and the hydroxyl group of the 3′ carbon of the sugar of the next nucleotide, which forms  a 5′ to 3′ phosphodiester linkage.
DNA Structure
DNA has a double-helix structure. The...
Nucleic Acids02:43

Nucleic Acids

Nucleic acids are the most important macromolecules for the continuity of life. They carry the cell's genetic blueprint and carry instructions for its functioning.
DNA and RNA
The two main types of nucleic acids are deoxyribonucleic acid (DNA) and ribonucleic acid (RNA). DNA is the genetic material in all living organisms, ranging from single-celled bacteria to multicellular mammals. It is in the nucleus of eukaryotes and in the organelles, chloroplasts, and mitochondria. In prokaryotes, the...
Nucleic acids02:43

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Nucleic acids are the most important macromolecules for the continuity of life. They carry the cell's genetic blueprint and carry instructions for its functioning.
DNA and RNA
The two main types of nucleic acids are deoxyribonucleic acid (DNA) and ribonucleic acid (RNA). DNA is the genetic material in all living organisms, ranging from single-celled bacteria to multicellular mammals. It is in the nucleus of eukaryotes and in the organelles, chloroplasts, and mitochondria. In prokaryotes, the...
Anionic Chain-Growth Polymerization: Overview01:20

Anionic Chain-Growth Polymerization: Overview

The polymerization process that involves carbanion as an intermediate is called anionic polymerization. It is also a type of addition or chain-growth polymerization. Anionic polymerization gets initiated by a strong nucleophile such as an organolithium or a Grignard reagent. The most commonly used initiator for anionic polymerization is butyl lithium. Monomers involved in anionic polymerization must possess a vinyl group bonded to one or two electron-withdrawing groups. For instance,...
Nucleic Acids and Nucleotides01:20

Nucleic Acids and Nucleotides

Nucleic acids are the most important macromolecules for the continuity of life. They carry the cell's genetic blueprint and have instructions for its functioning. The two main types of nucleic acids are deoxyribonucleic acid (DNA) and ribonucleic acid (RNA).
Deoxyribonucleic Acid (DNA)
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ATP and Macromolecule Synthesis01:28

ATP and Macromolecule Synthesis

Biological macromolecules are organic compounds, predominantly composed of carbon atoms. The carbon atoms are covalently bonded with hydrogen, oxygen, nitrogen, and other minor elements. There are four major biological macromolecule classes: carbohydrates, lipids, proteins, and nucleic acids.
Most macromolecules are composed of single subunits, or building blocks, called monomers. The monomers combine with each other using covalent bonds to form larger molecules known as polymers.
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Protocol for the Solid-phase Synthesis of Oligomers of RNA Containing a 2'-O-thiophenylmethyl Modification and Characterization via Circular Dichroism
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Published on: July 28, 2017

Oligopirenotidos: oligómeros abióticos, polianiónicos con propiedades estructurales similares a las del ácido

Robert Häner1, Florian Garo, Daniel Wenger

  • 1Department of Chemistry and Biochemistry, University of Bern, Freiestrasse 3, CH-3012 Bern, Switzerland. robert.haener@ioc.unibe.ch

Journal of the American Chemical Society
|May 13, 2010
PubMed
Resumen

Los oligopirenotidos, nuevos imitadores de ácido nucleico abiótico, forman híbridos estables a través del apilamiento de pireno, reflejando el comportamiento del ADN y el ARN. Estos compuestos ofrecen potencial para el diseño de sistemas de auto-replicación artificial.

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Área de la Ciencia:

  • * Química supramolecular * Química supramolecular * Química supramolecular *
  • * Biología Sintética.
  • * Astrobiología * Astrobiología

Sus antecedentes:

  • * Los ácidos nucleicos (ADN y ARN) son fundamentales para la vida, almacenando y transmitiendo información genética.
  • * Los sistemas artificiales que imitan las funciones del ácido nucleico son cruciales para comprender los orígenes de la vida y desarrollar nuevas tecnologías.
  • * Diseñar moléculas abióticas con propiedades similares al ácido nucleico es un desafío clave en la biología sintética.

Objetivo del estudio:

  • * Describir la síntesis y propiedades de los oligopirenotidos, una nueva clase de oligómeros abióticos.
  • * Investigar las analogías estructurales entre los oligopirenotidos y los ácidos nucleicos naturales.
  • * Evaluar el potencial de los oligopirenotidos como sistemas modelo para sistemas de autorreplicación artificial.

Principales métodos:

  • * Síntesis de bloques de construcción de pireno ligados al fosfodiéster con una unidad quiral de 1,2-diaminociclohexano.
  • * Estudios de hibridación en solución acuosa para evaluar las interacciones de los oligómeros.
  • * Experimentos de desnaturalización y renaturación térmica para analizar la estabilidad de la hibridación.
  • * Investigación del polimorfismo estructural dependiente de la concentración de sal.

Principales resultados:

  • * Los oligopirenotidos fueron sintetizados con éxito, exhibiendo analogías estructurales con los ácidos nucleicos.
  • * Se formaron híbridos estables en solución acuosa, impulsados por las interacciones de apilamiento de pireno.
  • * Los oligopirenotidos mostraron un comportamiento de desnaturalización/renaturación térmica similar al del ADN y el ARN.
  • * La concentración de sal influyó en el polimorfismo estructural de los oligopirenotidos.

Conclusiones:

  • * Los oligopirenotidos representan una nueva clase de moléculas abióticas con similitudes estructurales y funcionales significativas con los ácidos nucleicos.
  • * Su hibridación y comportamientos polimórficos los convierten en excelentes sistemas modelo para el estudio de los principios del ácido nucleico.
  • * Estos hallazgos abren caminos para el diseño de sistemas de autorreplicación artificial y formas de vida sintéticas.