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Una comparación de dos genes de beta-globina de ratón clonado y sus secuencias circundantes e intermedias
Cell
|June 1, 1978
Resumen
Los ratones BALB/c poseen dos genes de beta-globina con estructuras similares, incluidas las secuencias de ADN intermedias. Existe una homología limitada fuera de las regiones de codificación, lo que podría explicar la expresión génica coordinada.
Área de la Ciencia:
- Genética La genética.
- Biología Molecular Biología Molecular
Sus antecedentes:
- Los ratones BALB/c tienen dos genes de beta-globina no aleloides.
- Un fragmento de gen fue clonado previamente y se encontró que contenía secuencias de ADN intermedias.
Objetivo del estudio:
- Para clonar y caracterizar el segundo fragmento de ADN que contiene el gen beta-globina.
- Para comparar la estructura de los dos genes beta-globina para entender su expresión de coordenadas.
Principales métodos:
- Clonación y caracterización del ADN genómico.
- Análisis de restricción de la endonucleasa.
- Visualización de la estructura heterodúplex.
Principales resultados:
- El segundo fragmento del gen beta-globina fue clonado y caracterizado.
- Este gen también es interrumpido por una secuencia de ADN que interviene en una posición similar a la del primer gen.
- Se encontró una homología limitada (algunos cientos de pares de bases) fuera de las secuencias de codificación, principalmente flanqueando las regiones de codificación y adyacentes a las secuencias intermedias.
Conclusiones:
- Los dos genes de beta-globina en los ratones BALB/c comparten similitudes estructurales, incluidas las secuencias intermedias.
- La homología de secuencias limitada fuera de las regiones de codificación puede desempeñar un papel en su expresión de coordenadas y eliminación de secuencias intermedias.
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