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Adaptation of CRISPR-Cas9 for genome-editing applications has revolutionized biomedical research. New single-component effector CRISPR systems are emerging from the bioinformatics pipeline. How can we best harness their power? Three new studies will no doubt facilitate this transition by generating the C2c1 and C2c2 structure snapshots in different functional states.
The CRISPR system is an adaptive RNA-based microbial immune system against invasive genetic elements. CasB is an essential protein component in Type I-E Cascade. Here, we characterize CasB proteins from three different organisms as non-specific nucleic acid binding proteins. The Thermobifida fusca CasB crystal structure reveals conserved positive surface charges, which we show are important for its...
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