A pseudouridine residue in the spliceosome core is part of the filamentous growth program in yeast.
A pseudouridine residue in the spliceosome core is part of the filamentous growth program in yeast.
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DOI:
10.1016/j.celrep.2014.07.004
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发表时间:
2014-08-21
期刊:
影响因子:
8.8
通讯作者:
Query CC
中科院分区:
文献类型:
--
作者:
Basak A;Query CC
Pseudouridine nucleobases, while abundant in tRNAs, rRNAs, and snRNAs, are not known to have physiologic roles in cell differentiation. We have identified a novel pseudouridine residue (Ψ28) on spliceosomal U6 snRNA that is induced during filamentous growth of Saccharomyces cerevisiae. Pus1p catalyzes this modification and is up-regulated during filamentation. Several U6 snRNA mutants are strongly pseudouridylated at Ψ28; remarkably, these U6 mutants activate pseudo-hyphal growth, dependent upon Pus1p, arguing that U6-Ψ28 per se can initiate at least part of the filamentous growth program, a conclusion confirmed using a designer snoRNA targeting U6-U28 pseudouridylation. Conversely, mutants that block U6-U28 pseudouridylation inhibit pseudo-hyphal growth. U6-U28 pseudouridylation changes the efficiency of splicing of suboptimal introns; thus, Pus1p-dependent pseudouridylation of U6 snRNA contributes to the filamentation growth program.
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