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G3BP1 translocates into mitochondria to impair MCU complex function and promotes NASH progression

ABSTRACT: G3BP1 translocates into mitochondria to impair MCU complex function and promotes NASH progression

PROVIDER: PRJNA1051061 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR27177491_1.fastq.gz	Fastqsanger.gz
	SRR27177491_2.fastq.gz	Fastqsanger.gz
	SRR27177492_1.fastq.gz	Fastqsanger.gz
	SRR27177492_2.fastq.gz	Fastqsanger.gz
	SRR27177493_1.fastq.gz	Fastqsanger.gz

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G3BP1 translocates into mitochondria to impair MCU complex function and promotes NASH progression

Project description:Mitochondrial calcium signaling plays a critical role in mitochondrial homeostasis during non-alcoholic steatohepatitis (NASH) progression. Here, we report Ras‐GTPase activating protein SH3 domain‐binding protein 1 (G3BP1), a core protein of stress granule (SG), significantly upregulated in NAFLD/NASH patients, mouse models and palmitic acid-stimulated hepatocytes. Hepatocyte-specific G3BP1 deficiency attenuates NASH in two dietary mouse models. SG and the mitochondrial import protein TOM70 collaboratively mediate the translocation of G3BP1 to the mitochondria. G3BP1 interacts and stabilizes mitochondrial calcium uptake 1 (MICU1) via inhibiting YME1L1-mediated degradation of MICU1, and also impedes MCU complex activity and assembly, leading to mitochondrial calcium overload. Moreover, metabolic stress suppresses TRIM25-mediated K63-ubiquitination of G3BP1 and subsequent SG disassembly. Pharmacological inhibition of G3BP1 impairs the G3BP1-MICU1 interaction and prevents mitochondrial homeostasis imbalance and NASH progression. Collectively, we uncover the significant role of mitochondrial G3BP1 in mitochondrial homeostasis and NASH progression, which provides a potential target for therapeutic interventions.

2023-12-13 | GSE249869 | GEO

G3BP1 translocates into mitochondria to impair MCU complex function and promotes NASH progression [G3bp1-HKO and G3bp1-Flox mice with BSA or PA treatment]

2024-08-18 | GSE274650 | GEO

G3BP1 translocates into mitochondria to impair MCU complex function and promotes NASH progression [G3bp1-HKO and G3bp1-Flox mice with BSA or PA treatment]

Project description:G3BP1 translocates into mitochondria to impair MCU complex function and promotes NASH progression [G3bp1-HKO and G3bp1-Flox mice with BSA or PA treatment]

| PRJNA1147585 | ENA

mRNA Expression Changes Induced by Myocardial MCU Inhibition

Project description:Mitochondrial calcium is an important second-messenger controlling fight-or-flight responses in the heart. The molecular identity of MCU (Mitochondrial Calcium Uniporter) was recently discovered allowing us to test this hypothesis in vivo by expressing a myocardial delimited dominant negative form of MCU. We queried mRNA expression changes induced by dominant negative MCU expression in the heart. Neonatal (< 24 h) and 6 week old hearts were harvested from mice expressing the dominant negative MCU construct or wild-type littermates.

2015-06-07 | E-GEOD-62049 | biostudies-arrayexpress

MCU interactome from mitochondria proteome

Project description:The interactome of MCU was determined by AP-MS in a minaturised approach. This dataset was the test dataset to demonstrate the robustness of the method.

2022-06-23 | PXD029646 | Pride

mRNA Expression Changes Induced by Myocardial MCU Inhibition

Project description:Mitochondrial calcium is an important second-messenger controlling fight-or-flight responses in the heart. The molecular identity of MCU (Mitochondrial Calcium Uniporter) was recently discovered allowing us to test this hypothesis in vivo by expressiing a myocardial delimited dominant negative form of MCU. We queried mRNA expression changes induced by dominant negative MCU expression in the heart.

2015-06-07 | GSE62049 | GEO

G3BP1 Binds to Guanine Quadruplexes in mRNAs

Project description:we identify G3BP1 as a novel rG4-binding protein, and reveal that G3BP1 can modulate mRNA stability through its binding with rG4 structures

2021-03-16 | GSE168943 | GEO

ChIP-seq analysis of G3BP1 in KGN cells

Project description:To investigate whether G3BP1 binds to telomeric DNA, we performed the ChIP-seq analysis of G3BP1 in KGN cells.

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Paraburkholderia tropica strain:MCu-82

Project description:Paraburkholderia tropica MCu-82 genome sequencing

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G3BP1 inhibits Cul3SPOP to amplify AR signaling and promote prostate tumorigenesis

Project description:Speckle-type POZ protein (SPOP), an E3 ubiquitin ligase, acts as a tumor suppressor. We identified G3BP1 as non-substrate interactor of SPOP. G3BP1 is a well-known oncogene in many cancer types, but its role in prostate cancer (PCa) remains largely elusive. We showed that G3BP1 functions as an upstream regulator and potent endogenous inhibitor of Cul3SPOP, suggesting a distinctive Cul3SPOP inactivation independent of SPOP mutations. Transcriptomic analysis together with functional studies revealed that the G3BP1-SPOP ubiquitin signaling axis is involved in PCa progression through activating AR signaling. Further, AR upregulates G3BP1 to potentiate feed-forward amplification of signaling through G3BP1-SPOP axis. Overall, we show G3BP1high PCa tumors constitute a new subset where G3BP1 inhibits Cul3SPOP function to upregulate AR signaling, and promotes tumorigenesis.

2021-09-26 | GSE138612 | GEO

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