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- W2106838809 abstract "Small nucleolar and small Cajal body RNAs (snoRNAs and scaRNAs) of the H/ACA box and C/D box type are generated by exonucleolytic shortening of longer precursors. Removal of the last few nucleotides at the 3' end is known to be a distinct step. We report that, in human cells, knock-down of the poly(A) specific ribonuclease (PARN), previously implicated only in mRNA metabolism, causes the accumulation of oligoadenylated processing intermediates of H/ACA box but not C/D box RNAs. In agreement with a role of PARN in snoRNA and scaRNA processing, the enzyme is concentrated in nucleoli and Cajal bodies. Oligo(A) tails are attached to a short stub of intron sequence remaining beyond the mature 3' end of the snoRNAs. The noncanonical poly(A) polymerase PAPD5 is responsible for addition of the oligo(A) tails. We suggest that deadenylation is coupled to clean 3' end trimming, which might serve to enhance snoRNA stability." @default.
- W2106838809 created "2016-06-24" @default.
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- W2106838809 date "2012-03-22" @default.
- W2106838809 modified "2023-10-09" @default.
- W2106838809 title "Maturation of mammalian H/ACA box snoRNAs: PAPD5-dependent adenylation and PARN-dependent trimming" @default.
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- W2106838809 doi "https://doi.org/10.1261/rna.032292.112" @default.
- W2106838809 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/4105758" @default.
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- W2106838809 hasPublicationYear "2012" @default.
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