This Week in Nature

In a paper published online in advance in Nature this week, an international team led by investigators at Umeå University in Sweden describes a "novel pathway of small guide RNA maturation and the first example of a host factor — RNase III — required for bacterial RNA-mediated immunity against invaders." Using RNA-seq on Streptococcus pyrogenes, the team identified a "trans-encoded small RNA with 24-nucleotide complementarity to the repeat regions of crRNA precursor

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