Ribosoma 70S

From Proteopedia

Ribosoma procariota (Thermus thermophillus)

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En la imagen de la derecha podemos observar un modelo molecular de un ribosoma procariota (70 S). Se trata de una compleja estructura supramolecular, que consta de más de 90.000 átomos repartidos en dos moléculas de RNA ribosómico de diferente tamaño, varias decenas de proteínas ribosómicas y varios centenares de grupos fosfato e iones monoatómicos de Mg y Zn. Vamos a visualizar de modo secuencial estos componentes: En primer lugar, veamos las proteínas ribosómicas, que ahora podemos apreciar desde una posición más cercana

Ahora alejémonos de nuevo para ver las moléculas de RNA ribosómico. Detengámonos en la molécula de RNA ribosómico 5S y acerquémonos para ver los esqueletos azúcar fosfato y las bases nitrogenadas, que en algunas zonas se emparejan mediante puentes de hidrógeno formando dúplex.