Activation and self-inactivation mechanisms of the cyclic oligoadenylate-dependent CRISPR ribonuclease Csm6

Upon target RNA recognition, type III CRISPR-Cas systems produce cyclic oligoadenylates that activate effectors such as Csm6 ribonucleases. Here, Garcia-Doval et al. show that Enteroccocus italicus Csm6 degrades its cyclic hexa-AMP activator, and report the crystal structure of the protein bound to...

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Autores principales: Carmela Garcia-Doval, Frank Schwede, Christian Berk, Jakob T. Rostøl, Ole Niewoehner, Oliver Tejero, Jonathan Hall, Luciano A. Marraffini, Martin Jinek
Formato: article
Lenguaje:EN
Publicado: Nature Portfolio 2020
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Acceso en línea:https://doaj.org/article/72db17b42bde4a3aab3bcb1de11e229a
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Sumario:Upon target RNA recognition, type III CRISPR-Cas systems produce cyclic oligoadenylates that activate effectors such as Csm6 ribonucleases. Here, Garcia-Doval et al. show that Enteroccocus italicus Csm6 degrades its cyclic hexa-AMP activator, and report the crystal structure of the protein bound to an activator mimic.