The nuclear RNA polymerase II surveillance system targets polymerase III transcripts

Tollervey lab paper featured in EMBO Journal.

Image
Image from Tollervey paper, EMBO Journal 2011

Authors

Wlotzka W, Kudla G, Granneman S, Tollervey D.

Summary

(A) The Nrd1-Nab3 heterodimer was previously known to interact with the mRNA cap-binding complex (CBC) and with RNA Polymerase II. Nrd1-Nab3 initiate transcription termination following recognition of consensus binding sites, which are present in genes encoding small nuclear and small nucleolar RNAs and a variety of long ncRNAs (CUTs and SUTs). They subsequently recruit TRAMP and exosome complexes for oligoadenylation and degradation or processing of the target RNA.

(B) Nrd1-Nab3 are now shown to also interact post transcriptionally with aberrant Pol III transcripts, including precursors to tRNA and the RNA component of RNase P, recognizing consensus binding motifs and/or structural abnormalities in the RNA. They subsequently recruit TRAMP and exosome complexes for oligoadenylation and degradation.

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