Tanaka N, Chakravarty AK, Maughan B, Shuman S. Novel mechanism of RNA repair by RtcB via sequential 2',3'-cyclic phosphodiesterase and 3'-Phosphate/5'-hydroxyl ligation reactions. J Biol Chem. 2011 Dec 16;286(50):43134-43. doi: 10.1074/jbc.M111.302133. Epub 2011 Oct 31. PMID: 22045815; PMCID: PMC3234866.

RTCB同时含有CPDase活性和3'-P ligase活性,意味着RTCB的底物不只是2',3'-cyclic phosphate,还包括3'-phosphate。
后面一篇Science又证实了human RtcB可以连接3'P和5'-OH.

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