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- W2033295584 abstract "Protein arginine methylation, one of the most abundant and important posttranslational modifications, is involved in a multitude of biological processes in eukaryotes, such as transcriptional regulation and RNA processing. Symmetric arginine dimethylation is required for snRNP biogenesis and is assumed to be essential for pre-mRNA splicing; however, except for in vitro evidence, whether it affects splicing in vivo remains elusive. Mutation in an Arabidopsis symmetric arginine dimethyltransferase, AtPRMT5, causes pleiotropic developmental defects, including late flowering, but the underlying molecular mechanism is largely unknown. Here we show that AtPRMT5 methylates a wide spectrum of substrates, including some RNA binding or processing factors and U snRNP AtSmD1, D3, and AtLSm4 proteins, which are involved in RNA metabolism. RNA-seq analyses reveal that AtPRMT5 deficiency causes splicing defects in hundreds of genes involved in multiple biological processes. The splicing defects are identified in transcripts of several RNA processing factors involved in regulating flowering time. In particular, splicing defects at the flowering regulator flowering locus KH domain (FLK) in atprmt5 mutants reduce its functional transcript and protein levels, resulting in the up-regulation of a flowering repressor flowering locus C (FLC) and consequently late flowering. Taken together, our findings uncover an essential role for arginine methylation in proper pre-mRNA splicing that impacts diverse developmental processes." @default.
- W2033295584 created "2016-06-24" @default.
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- W2033295584 date "2010-10-18" @default.
- W2033295584 modified "2023-10-14" @default.
- W2033295584 title "Arginine methylation mediated by the <i>Arabidopsis</i> homolog of PRMT5 is essential for proper pre-mRNA splicing" @default.
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- W2033295584 doi "https://doi.org/10.1073/pnas.1009669107" @default.
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