Video Experimental Relacionado
Updated: Oct 17, 2025

15:22
Nucleoside Triphosphates - From Synthesis to Biochemical Characterization
Published on: April 3, 2014
17.3K
Síntesis y reconocimiento por polimerasa de los trifosfatos de ácido nucleico treosa dotados de diversas
Journal of the American Chemical Society
|October 12, 2021
Resumen
Los investigadores sintetizaron nuevos polímeros genéticos no naturales (XNA) con diversos grupos funcionales para mejorar la estabilidad terapéutica del aptamer y la afinidad de unión. Una polimerasa desarrollada en el laboratorio reconoció estos nucleósidos trifosfatados modificados, expandiendo las capacidades de la biología sintética.
Área de la Ciencia:
- Biología sintética
- La bioquímica
- Química medicinal
Sus antecedentes:
- Los polímeros genéticos no naturales (XNA) ofrecen un potencial terapéutico debido a su mayor estabilidad.
- La expansión de la diversidad química de XNA es crucial para el desarrollo de aptameros de alta afinidad.
- Los métodos actuales para la síntesis de XNA requieren una mayor diversificación química.
Objetivo del estudio:
- Síntesis y caracterización de nuevos análogos de trifosfato nucleósido de α-l-treofuranosil uridina (tUTP) con diversos grupos funcionales C-5.
- Evaluar el reconocimiento de la polimerasa y la incorporación de estos tUTP modificados en polímeros XNA.
- Aclarar la base estructural para el reconocimiento de la polimerasa de sustratos XNA modificados.
Principales métodos:
- Síntesis química de 10 análogos distintos de tUTP modificados con C5.
- Evaluación del reconocimiento del sustrato por la polimerasa Kod-RSGA desarrollada en laboratorio.
- Determinación de la estructura cristalina de rayos X de alta resolución del complejo poscatalítico Kod-RSGA.
Principales resultados:
- Síntesis exitosa de 10 sustratos modificados químicamente con C-5.
- Reconocimiento universal y polimerización eficiente de todos los análogos de tUTP probados por Kod-RSGA.
- La cristalografía de rayos X reveló una gran cavidad del sitio activo de la enzima que acomoda diversas cadenas laterales C-5.
Conclusiones:
- El estudio proporciona una ruta sintética para expandir el espacio químico de los sistemas XNA evolutivos.
- Se puede lograr una modificación uniforme con grupos funcionales que mejoren la diversidad.
- Estos hallazgos allanan el camino para nuevos aptámeros terapéuticos con mejor unión y estabilidad.
Videos de Conceptos Relacionados
Nucleic Acid Structure
7.6K
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...
DNA Structure
DNA...
7.6K
ATP and Macromolecule Synthesis
6.3K
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.
Conversion of...
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.
Conversion of...
6.3K
Phosphodiester Linkages
105.4K
Overview
Phosphodiester bond forms when a phosphoric acid molecule (H3PO4) links with two hydroxyl groups (–OH) of two other molecules, forming two ester bonds. Two water molecules are released in this process. The phosphodiester bond is commonly found in nucleic acids (DNA and RNA) and plays a critical role in their structure and function.
Phosphodiester Bonds Link Nucleotides Together
DNA and RNA are polynucleotides or long chains of nucleotides that are linked together. A nucleotide is...
Phosphodiester bond forms when a phosphoric acid molecule (H3PO4) links with two hydroxyl groups (–OH) of two other molecules, forming two ester bonds. Two water molecules are released in this process. The phosphodiester bond is commonly found in nucleic acids (DNA and RNA) and plays a critical role in their structure and function.
Phosphodiester Bonds Link Nucleotides Together
DNA and RNA are polynucleotides or long chains of nucleotides that are linked together. A nucleotide is...
105.4K
Transfer RNA Synthesis
12.4K
One of the unique features of tRNA is the presence of modified bases. In some tRNAs, modified bases account for nearly 20% of the total bases in the molecule. Altogether, these unusual bases protect the tRNA from enzymatic degradation by RNases.
Each of these chemical modifications is carried by a specific enzyme, post-transcription. All of these enzymes have unique base and site-specificity. Methylation, the most common chemical modification, is carried by at least nine different enzymes, with...
Each of these chemical modifications is carried by a specific enzyme, post-transcription. All of these enzymes have unique base and site-specificity. Methylation, the most common chemical modification, is carried by at least nine different enzymes, with...
12.4K
Biosynthesis of Nucleic Acids
328
Nucleic acid biosynthesis is a fundamental biochemical process that produces the purine and pyrimidine nucleotides essential for DNA and RNA synthesis. This pathway maintains a balanced nucleotide pool, preventing imbalances that could jeopardize genetic integrity and cellular function. Given the crucial role of nucleotides, their synthesis is tightly regulated to ensure proper cellular homeostasis.Purine BiosynthesisThe biosynthesis of purine nucleotides begins with ribose-5-phosphate, a...
328
Nucleic Acids
46.9K
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,...
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,...
46.9K

