Abstract
Varkud satellite ribozyme (VS ribozyme) is a class of catalytic RNA with self-cleavage activity. The wild-type VS ribozyme has structural modularity with a relatively large catalytic module (H2–H6 elements) and a small substrate module (H1 element). The two modules can be dissected physically, and the substrate H1 RNA is recognized and then cleaved by the rest of the parent ribozyme serving as catalytic RNA. We characterized the catalytic properties of a bimolecular VS ribozyme developed and employed for an in-droplet evolution experiment of the VS ribozyme. We examined the effects of polyamines and several divalent metal ions. The results obtained in this study would be useful for the optimization of laboratory evolution of the VS ribozyme.
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