|Citation||Nakamura, R., Takeuchi, R., Takata, K., Shimanouchi, K., Abe, Y., Kanai, Y., Ruike, T., Ihara, A., Sakaguchi, K. (2008). TRF4 is involved in polyadenylation of snRNAs in Drosophila melanogaster. Mol. Cell. Biol. 28(21): 6620--6631. (Export to RIS)|
|Publication Type||Research paper|
|PubMed Abstract||The Saccharomyces cerevisiae poly(A) polymerases Trf4 and Trf5 are involved in an RNA quality control mechanism, where polyadenylated RNAs are degraded by the nuclear exosome. Although Trf4/5 homologue genes are distributed throughout multicellular organisms, their biological roles remain to be elucidated. We isolated here the two homologues of Trf4/5 in Drosophila melanogaster, named DmTRF4-1 and DmTRF4-2, and investigated their biological function. DmTRF4-1 displayed poly(A) polymerase activity in vitro, whereas DmTRF4-2 did not. Gene knockdown of DmTRF4-1 by RNA interference is lethal in flies, as is the case for the trf4 trf5 double mutants. In contrast, disruption of DmTRF4-2 results in viable flies. Cellular localization analysis suggested that DmTRF4-1 localizes in the nucleolus. Abnormal polyadenylation of snRNAs was observed in transgenic flies overexpressing DmTRF4-1 and was slightly increased by the suppression of DmRrp6, the 3'-5' exonuclease of the nuclear exosome. These results suggest that DmTRF4-1 and DmRrp6 are involved in the polyadenylation-mediated degradation of snRNAs in vivo.|
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|Language of Publication||English|
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|Also Published As|
|Abbreviation||Mol. Cell. Biol.|
|Title||Molecular and Cellular Biology|
|Data from Reference|
|Natural transposons (1)|