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• W2007783008 endingPage "e1002258" @default.
• W2007783008 startingPage "e1002258" @default.
• W2007783008 abstract "Elongator complex is required for formation of the side chains at position 5 of modified nucleosides 5-carbamoylmethyluridine (ncm5U34), 5-methoxycarbonylmethyluridine (mcm5U34), and 5-methoxycarbonylmethyl-2-thiouridine (mcm5s2U34) at wobble position in tRNA. These modified nucleosides are important for efficient decoding during translation. In a recent publication, Elongator complex was implicated to participate in telomeric gene silencing and DNA damage response by interacting with proliferating cell nuclear antigen (PCNA). Here we show that elevated levels of tRNALyss2UUU, tRNAGlns2UUG, and tRNAGlus2UUC, which in a wild-type background contain the mcm5s2U nucleoside at position 34, suppress the defects in telomeric gene silencing and DNA damage response observed in the Elongator mutants. We also found that the reported differences in telomeric gene silencing and DNA damage response of various elp3 alleles correlated with the levels of modified nucleosides at U34. Defects in telomeric gene silencing and DNA damage response are also observed in strains with the tuc2Δ mutation, which abolish the formation of the 2-thio group of the mcm5s2U nucleoside in tRNALysmcm5s2UUU, tRNAGlnmcm5s2UUG, and tRNAGlumcm5s2UUC. These observations show that Elongator complex does not directly participate in telomeric gene silencing and DNA damage response, but rather that modified nucleosides at U34 are important for efficient expression of gene products involved in these processes. Consistent with this notion, we found that expression of Sir4, a silent information regulator required for assembly of silent chromatin at telomeres, was decreased in the elp3Δ mutants." @default.
• W2007783008 created "2016-06-24" @default.
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• W2007783008 date "2011-09-01" @default.
• W2007783008 modified "2023-10-18" @default.
• W2007783008 title "Elongator Complex Influences Telomeric Gene Silencing and DNA Damage Response by Its Role in Wobble Uridine tRNA Modification" @default.
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• W2007783008 doi "https://doi.org/10.1371/journal.pgen.1002258" @default.
• W2007783008 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/3164696" @default.
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