430-Cas12a3 cleaves tRNA tails to execute bacterial immunity
This research explores a newly discovered bacterial defense mechanism where the CRISPR–Cas12a3 system provides immunity by specifically targeting and cleaving tRNA tails. While many immune systems disable viral replication by destroying viral genomes, this variant is unique because it preferentially inactivates host tRNAs after recognizing a viral target. By removing the essential 3′ CCA tail of tRNAs not currently engaged in translation, the nuclease triggers a global translational shutdown that halts cellular growth to stop the infection. Structural analysis reveals that Cas12a3 has evolved…
The skinny
The skinny isn't ready yet — notes appear once the transcript is processed.