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Identification of mRNAs associated with NAT10 in mouse hearts

ABSTRACT: Identification of mRNAs associated with NAT10 in mouse hearts

PROVIDER: PRJNA1144455 | ENA |

REPOSITORIES: ENA

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Identification of mRNAs associated with NAT10 in mouse hearts

Project description:The goal of this study is to identify mRNAs associated with NAT10 in mouse hearts.

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Identification of ribosome-protected mRNA fragments (RPFs) associated with NAT10 in mouse hearts

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Project description:Massive numbers of modified bases in mRNAs sculpt the epitranscriptome and play vital roles in RNA metabolism. The only known acetylated RNA modification, N-4-acetylcytidine (ac4C), is highly conserved across cell types and among species. Although the GCN5-related acetyltransferase 10 (NAT10) functions as an ac4C writer, the mechanism underlying the acetylation process is largely unknown. In this study, we identified the NAT10/PCBP/TDP43 complex as an mRNA ac4C writer in mammalian cells. We identified RNA-binding proteins (RBPs) affiliated with two different families, PCBP1/2 (poly(rC)-binding protein 1/2) and TDP43 (TAR DNA binding protein 43), as NAT10 adaptors for mRNA tethering and substrate selection. Knockdown of the adaptors resulted in decreased mRNA acetylation abundance in HEK293T cells, with globally reduced density in 5`-untranslated region (UTR) and coding sequence (CDS) and ablated cytidine-rich ac4C motifs. The adaptors also affect the ac4C sites by recruiting NAT10 to their binding sequences. The presence of the NAT10/PCBP/TDP43 complex in mouse testes highlights its potential physiological functions in vivo. These findings reveal the composition of the mRNA ac4C writer complex in mammalian cells and expand our knowledge of mRNA acetylation and ac4C site preferences.

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NAT10 inhibition improves cellular phenotypes of Hutchinson-Gilford progeria syndrome by restoring the Transportin-1 pathway

Project description:In this experiment, we aim to examine the role of NAT10 inhibition in Hutchinson-Gilford progeria syndrome (HGPS), a rare but devastating premature ageing syndrome caused by a mutation in the LMNA gene. NAT10 inhibition improves HGPS cellular phenotypes by releasing Transportin-1 (TNPO1) from the cytoplasm, restoring the TNPO1 pathway and allowing hnRNPA1 and NUP153 nuclear import, TPR anchorage at the nuclear pore complexes and RanGTP gradient re-balancing. We have promoted NAT10 inhibition by two ways in normal or patient derived primary skin fibroblasts; the NAT10 inhibitor Remodelin, and an siRNA directly targeting NAT10 (siNAT10). In addition, we have also used an siRNA against TNPO1 and a combined siTNPO1 and siNAT10 treatment. This is a 2-factor design, with treatment (Remodelin vs untreated, or siNAT10 vs siCT) and condition (HGPS vs normal fibroblasts) as the two conditions. Transcriptional profiling was performed using HumanHT-12 v4 Expression BeadChip microarrays, and all conditions were run in triplicate.

2018-06-25 | E-MTAB-6651 | biostudies-arrayexpress

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