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Updated: Jan 22, 2026

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Kinetic Screening of Nuclease Activity using Nucleic Acid Probes
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Secuenciación de Sanger de Ácido Xeno-Nucleico
Yueyao Wang1, Ze Zhang2, Lekang Chen2
1School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing, Jiangsu, 210023, China.
Angewandte Chemie (International ed. in English)
|January 21, 2026
Resumen
Los investigadores desarrollaron un método de secuenciación de Sanger para XNA (ácido xeno-nucleico) utilizando un mutante de la polimerasa de ADN Bst. Esto permite la lectura directa de secuencias de XNA, avanzando la biotecnología y el almacenamiento de datos.
Área de la Ciencia:
- Biotecnología
- Biología Sintética
- Biología Molecular
Sus antecedentes:
- Los ácidos xeno-nucleicos (XNA) son polímeros genéticos sintéticos con mayor estabilidad en comparación con el ADN.
- Las tecnologías actuales de secuenciación de ADN son incompatibles con los XNA, lo que limita su aplicación.
- El desarrollo de métodos para la secuenciación de XNA es crucial para su uso en biotecnología y tecnología de la información.
Objetivo del estudio:
- Desarrollar un método de secuenciación de Sanger directo para XNA.
- Permitir la determinación precisa de la secuencia de varios tipos de XNA.
- Sentar las bases para aplicaciones basadas en XNA, como el almacenamiento de datos.
Principales métodos:
- Se utilizó un mutante F710Y de la ADN polimerasa Bst diseñado para el reconocimiento de plantillas de XNA.
- Se empleó una estrategia de terminación de cadena con triofosfatos de dideoxinucleósido (ddNTP) para la síntesis de ADN complementario.
- Se demostró la prueba de concepto de secuenciación automatizada en un analizador genético utilizando ddNTPs marcados con BigDye.
Principales resultados:
- Se logró la lectura directa de hebras de XNA de hasta 50 bases de longitud.
- El mutante Bst F710Y mostró una actividad significativamente mejorada en la incorporación de ddNTP.
- Se demostró la secuenciación precisa de XNA con diferentes químicas de backbone (por ejemplo, TNA, FANA).
Conclusiones:
- Se estableció una nueva plataforma de secuenciación de Sanger para el análisis de XNA.
- El método facilita la identificación y caracterización de novo de XNA funcionales.
- Allana el camino para aplicaciones avanzadas de XNA, incluido el almacenamiento de información genética.
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