Comentario sobre "Los orígenes antiguos de la activación alostérica en una Ser-Thr quinasa"
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Ver abstracta en PubMed
Resumen
Este resumen es generado por máquina.Las quinasas auroras desarrollaron la regulación alostérica a través de sustituciones de secuencias históricas. Sin embargo, este estudio revela que los hallazgos anteriores se basaron en árboles evolutivos defectuosos y datos limitados, lo que sugiere que la alostería se perdió, no se ganó, en algunos hongos.
Área De La Ciencia
- Biología evolutiva
- La bioquímica
- La genómica
Sus Antecedentes
- Las quinasas auroras son reguladores cruciales de la división celular.
- Investigaciones anteriores sugirieron que las quinasas Aurora desarrollaron regulación alosterica durante la evolución eucariota temprana.
- La reconstrucción de secuencias ancestrales es un método para inferir secuencias de proteínas ancestrales.
Objetivo Del Estudio
- Para reevaluar la historia evolutiva de la regulación alostérica en las quinasas Aurora.
- Identificar posibles inexactitudes en los métodos de reconstrucción de secuencias ancestrales anteriores.
- Para determinar si la regulación alostérica fue ganada o perdida durante la evolución.
Principales Métodos
- Análisis filogenético utilizando árboles evolutivos actualizados.
- Genómica comparativa con muestreo de secuencias expandidas.
- Reconstrucción de la secuencia ancestral.
Principales Resultados
- La filogenia utilizada por Hadzipasic et al. fue hallado inverosímil.
- El escaso muestreo de secuencias condujo a reconstrucciones ancestrales inexactas.
- El nuevo análisis indicó que la regulación alostérica probablemente se perdió en un subgrupo de hongos, no se ganó en eucariotas.
Conclusiones
- La evolución de la regulación alostérica en las quinasas Aurora requiere una reevaluación.
- Los métodos filogenéticos y de muestreo inexactos pueden conducir a inferencias evolutivas erróneas.
- La regulación alostérica en las quinasas Aurora puede representar una pérdida en ciertos linajes fúngicos en lugar de una ganancia en los eucariotas tempranos.
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