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Charged tRNA profiling of mcf10a, HCC1806 cells, polysome profiling, RNA-Seq and Ribo-Seq in 4T07 cells upon LARS knockdown by shRNA, and RNA-Seq of ribosome-associated RNAs in Lars depleted PyMT tumors

ABSTRACT: Charged tRNA profiling of mcf10a, HCC1806 cells, polysome profiling, RNA-Seq and Ribo-Seq in 4T07 cells upon LARS knockdown by shRNA, and RNA-Seq of ribosome-associated RNAs in Lars depleted PyMT tumors

PROVIDER: PRJNA734953 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR14722521.fastq.gz	Fastqsanger.gz
	SRR14722522.fastq.gz	Fastqsanger.gz
	SRR14722523.fastq.gz	Fastqsanger.gz
	SRR14722524.fastq.gz	Fastqsanger.gz
	SRR14722525.fastq.gz	Fastqsanger.gz

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Charged tRNA profiling of mcf10a, HCC1806 cells, polysome profiling, RNA-Seq and Ribo-Seq in 4T07 cells upon LARS knockdown by shRNA, and RNA-Seq of ribosome-associated RNAs in Lars depleted PyMT tumors

Project description:In this study, we identify leucyl-tRNA synthetase (LARS) as a breast tumor suppressor. To identify the mechanism underlying LARS-mediated breast tumor suppression, we first conducted charged tRNA profiling to assess charged and total tRNA-Leu expression in cell lines with high and low LARS expression. Expression of select charged and total tRNA-Leu isoacceptors were reduced in cell lines with lower LARS expression. We then conducted RNA-Seq and translation profiling including ribosome profiling (Ribo-Seq), polysome profiling in LARS-depleted cell lines. To test our hypothesis in vivo, we also performed RNA-Seq of ribosome-associated RNAs in Lars depleted PyMT tumors within RiboTag mice. The analyses implicate LARS as a regulator of leucine-rich translation.

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Ribo-seq of HEK293T overexpressing WT and G240R GARS

Project description:Charcot-Marie-Tooth (CMT) disease can be caused by mutations in Aminoacyl-tRNA-Synthetases, including G240R mutation in Glycyl-tRNA-Synthetase (GARS). Ribo-seq generates snapshots of translating ribosomes on mRNA and therefore allows analysis of ribosome pausing mRNA. Here we performed Ribo-seq on lysates of HEK293T cells overexpressing GARS, WT or G240R, to dissect mechanism of CMT linked with translation. We found that GARS G240R causes pausing of ribosomes with glycine codons in A-site. The effect is specific for 21 nt ribosome-protected fragments, produced by ribosomes with empty A-sites, suggestive of the deficit of charged Glycyl-tRNA in GARS G240R-CMT.

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