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Pubmed ID :12062100
Publication Date : //

Cid13 is a cytoplasmic poly(A) polymerase that regulates ribonucleotide reductase mRNA.


Fission yeast Cid13 and budding yeast Trf4/5 are members of a newly identified nucleotidyltransferase family conserved from yeast to man. Trf4/5 are thought to be essential DNA polymerases. We report that Cid13 is a poly(A) polymerase. Unlike conventional poly(A) polymerases, which act in the nucleus and indiscriminately polyadenylate all mRNA, Cid13 is a cytoplasmic enzyme that specifically targets suc22 mRNA that encodes a subunit of ribonucleotide reductase (RNR). cid13 mutants have reduced dNTP pools and are sensitive to hydroxyurea, an RNR inhibitor. We propose that Cid13 defines a cytoplasmic form of poly(A) polymerase important for DNA replication and genome maintenance.

Authors : Saitoh Shigeaki , Chabes Andrei , McDonald W Hayes , Thelander Lars , Yates John R , Russell Paul ,

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