Biochemical analysis of the Cas6-1 RNA endonuclease associated with the subtype I-D CRISPR-Cas system in Synechocystis sp. PCC 6803.

ABSTRACT: Specialized RNA endonucleases are critical for efficient activity of the CRISPR-Cas defense mechanisms against invading DNA or RNA. Cas6-type enzymes are the RNA endonucleases in many type I and type III CRISPR-Cas systems. These enzymes are diverse and critical residues involved in the recognition and cleavage of RNA substrates are not universally conserved. Cas6 endonucleases associated with the CRISPR-Cas subtypes I-A, I-B, I-C, I-E and I-F, as well as III-B have been studied from three archaea and four bacteria thus far. However, until now information about subtype I-D specific Cas6 endonucleases has remained scarce. Here, we report the biochemical analysis of Cas6-1, which is specific for the crRNA maturation from the subtype I-D CRISPR-Cas system of Synechocystis sp. PCC 6803. Assays

SUBMITTER: Jesser R 

PROVIDER: S-EPMC6546407 | biostudies-literature | 2019 Apr

REPOSITORIES: biostudies-literature