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Criptocromos: receptores de luz azul para plantas y animales
A R Cashmore1, J A Jarillo, Y J Wu
1Plant Science Institute, Department of Biology, University of Pennsylvania, Philadelphia, PA 19104-6018, USA. cashmore@upenn.sas.edu
Science (New York, N.Y.)
|April 30, 1999
Resumen
Los criptocromos, fotorreceptores de luz azul que se encuentran ampliamente en las plantas, regulan los ritmos circadianos. Los criptocromos vegetales y animales evolucionaron por separado, y las versiones animales aparecieron más recientemente junto con relojes circadianos modificados.
Área de la Ciencia:
- La bioquímica es la bioquímica.
- Biología Molecular Biología Molecular
- Biología evolutiva Biología evolutiva.
Sus antecedentes:
- Los criptocromos son fotorreceptores de luz azul, ultravioleta y A.
- Son flavoproteínas evolutivamente relacionadas con las fotoliasas.
- Los criptocromos se encuentran ubicuamente en las plantas, desde algas hasta Arabidopsis.
Objetivo del estudio:
- Para investigar la historia evolutiva y la función de los criptocromos.
- Para comparar las familias de criptocromo de plantas y animales.
- Comprender el papel de los criptocromos en el arrastre del ritmo circadiano.
Principales métodos:
- Comparación de secuencias de criptocromos vegetales y animales.
- Análisis de la función del criptocromo en organismos modelo como Arabidopsis y Drosophila.
- Investigando la relación entre los criptocromos y las proteínas del reloj circadiano.
Principales resultados:
- Las familias criptocromáticas de plantas y animales poseen distintas historias evolutivas.
- Los criptocromos vegetales son de origen antiguo, mientras que los criptocromos animales evolucionaron más recientemente.
- Los criptocromos median las respuestas a la luz, incluida la captura del ritmo circadiano en diversas especies.
Conclusiones:
- Los criptocromos juegan un papel crucial en la percepción de la luz y la regulación circadiana en todos los reinos.
- La evolución independiente de los criptocromos vegetales y animales pone de relieve la evolución convergente.
- La evolución reciente de los criptocromos animales puede estar relacionada con la aparición de nuevos mecanismos de reloj circadiano.
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