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Transcriptome analysis of V336Y mutant mitochondrial ribosomal protein in human HEK293 cell line

ABSTRACT: Transcriptome analysis of V336Y mutant mitochondrial ribosomal protein in human HEK293 cell line

PROVIDER: PRJNA394695 | ENA |

REPOSITORIES: ENA

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Transcriptome analysis of V336Y mutant mitochondrial ribosomal protein in human HEK293 cell line

Project description:Analysis of HEK293 cells lines expressing V336Y mutant mitochondrial ribosomal protein.

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Transcriptome analysis of V338Y mutant mitochondrial ribosomal protein in mouse brain tissue.

Project description:Analysis of brain from C57BL/6 mice expressing V338Y mutant mitochondrial ribosomal protein.

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Ribosomal mistranslation leads to silencing of the unfolded protein response and increased mitochondrial biogenesis

Project description:Translation fidelity is the limiting factor in the accuracy of gene expression. With an estimated frequency of 10-4, errors in mRNA decoding occur in a mostly stochastic manner. Little is known about the response of higher eukaryotes to chronic loss of ribosomal accuracy as per an increase in the random error rate of mRNA decoding. Here, we present a global and comprehensive picture of the cellular changes in response to translational accuracy in mammalian ribosomes impaired by genetic manipulation. In addition to affecting established protein quality control pathways, such as elevated transcript levels for cytosolic chaperones, activation of the ubiquitin-proteasome system, and translational slowdown, ribosomal mistranslation led to unexpected responses. In particular, we observed increased mitochondrial biogenesis associated with import of misfolded proteins into the mitochondria and silencing of the unfolded protein response in the endoplasmic reticulum. This study describes the metabolomic analysis of HEK293 cells lines expressing mutant ribosomal protein RPS2 (human A226Y). RPS2 A226Y mutation has been shown to cause misreading and readthrough. Results provide insight into the response to chronic mistranslation in mammalian cells.

2019-09-17 | MTBLS106 | MetaboLights

Transcriptome analysis of V338Y mutant mitochondrial ribosomal protein in mouse brain tissue.

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Transcriptome analysis of V338Y mutant mitochondrial ribosomal protein in mouse muscle tissue

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KDM5-mediated transcriptional activation of ribosomal protein genes alters translation efficiency to regulate mitochondrial metabolism.

Project description:Genes encoding the KDM5 family of transcriptional regulators are disrupted in individuals with intellectual disability (ID). To understand the link between KDM5 and ID, we generated five Drosophila strains harboring missense alleles analogous to those observed in patients. These alleles showed effects on neuroanatomical development, cognition, and other behaviors, in addition to a transcriptional signature that included the downregulation of many ribosomal protein genes. A similar transcriptional profile was observed in KDM5C knockout human glutamatergic neurons derived from induced pluripotent stem cells (iPSCs), suggesting a conserved role for KDM5 proteins in regulating ribosomal protein genes. Loss of ribosomal protein gene expression resulted in changes to neuronal ribosome composition. Moreover, we find that the translation efficiency of mRNAs required for mitochondrial metabolism was particularly affected upon reduction KDM5 in Drosophila neurons. Altered mitochondrial activity was confirmed through metabolomic studies that revealed decreased citric acid cycle activity. KDM5 therefore plays a key role in maintaining mitochondrial function that, when altered, could contribute to cognitive and behavioral phenotypes.

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KDM5-mediated transcriptional activation of ribosomal protein genes alters translation efficiency to regulate mitochondrial metabolism II.

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HEK293 stably expressing Autoimmune regulator protein

Project description:Auto Immune REgulator (AIRE) protein expression in HEK293 cells Three cell-lines where used in the study: HEK293-NC; control cell-line expressing yellow fluorescent protein (YFP) HEK-AIRE1, HEK-AIRE2; two different clone-derived Autoimmune regulator protein expressing cell-lines HEK-AIRE-D312A; cell line expressing Autoimmune regulator protein with D312A mutation in the first PHD finger With all cell-lines three independent experiments were performed.

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