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A Deep-sequencing-assisted, Spontaneous Suppressor Screen in the Fission Yeast Schizosaccharomyces pombe
Published on: March 7, 2019
El gen para el ARN nuclear pequeño U6 en la levadura de fisión tiene un intrón
Nature
|January 5, 1989
Resumen
Los investigadores descubrieron un intrón dentro del gen Schizosaccharomyces pombe U6 de ARN nuclear pequeño (ARNn), una primicia para los genes de ARNn. Este intrón se elimina con precisión, lo que sugiere que el ARN U6 puede actuar como un sustrato de empalme, además de su papel en el empalme pre-ARNm.
Área de la Ciencia:
- Biología Molecular Biología Molecular
- Genética La genética.
- ARN Biología Biología ARN
Sus antecedentes:
- Los pequeños ARN nucleares (ARN sn) son cruciales para el empalme pre-ARNm en las células eucariotas.
- Las células de los mamíferos utilizan los snRNA U1-U6, formando pequeñas partículas de ribonucleoproteína nuclear (snRNP).
- Los snRNP U1, U2, U4, U5 y U6 son componentes integrales del espliceosoma.
Objetivo del estudio:
- Para caracterizar el gen que codifica Schizosaccharomyces pombe U6 snRNA.
- Para investigar la estructura y el procesamiento del snRNA U6 en esta especie de levadura.
Principales métodos:
- Técnicas de caracterización de genes.
- Análisis de la mancha del norte.
- Secuenciación de ARN. secuenciación de ARN.
Principales resultados:
- El gen Schizosaccharomyces pombe U6 snRNA contiene inesperadamente una secuencia de 50 pares de bases de tipo intrónico.
- La secuenciación de la mancha del norte y del ARN confirmó la eliminación precisa de este intrón de la transcripción.
- El ARN U6 de Schizosaccharomyces pombe maduro comparte una homología de secuencia del 77% con el ARN U6 de los mamíferos.
Conclusiones:
- Este es el primer caso reportado de un intrón dentro de un pequeño gen de ARN nuclear.
- Los hallazgos sugieren que el ARN U6 en Schizosaccharomyces pombe podría funcionar como un sustrato de empalme, además de su papel en el empalme pre-ARNm.
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