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Systematic analysis of IL-17 receptor signalosome reveals a robust regulatory feedback loop

ABSTRACT: Systematic analysis of IL-17 receptor signalosome reveals a robust regulatory feedback loop

PROVIDER: PRJNA631997 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR11778478_1.fastq.gz	Fastqsanger.gz
	SRR11778478_2.fastq.gz	Fastqsanger.gz
	SRR11778479_1.fastq.gz	Fastqsanger.gz
	SRR11778479_2.fastq.gz	Fastqsanger.gz
	SRR11778480_1.fastq.gz	Fastqsanger.gz

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Systematic analysis of IL-17 receptor signalosome reveals a robust regulatory feedback loop

Project description:IL-17 mediates immune protection from fungi and bacteria as well as it promotes autoimmune pathologies. However, the regulation of the signal transduction from the IL-17 receptor (IL-17R) remained elusive. We developed a novel mass spectrometry-based approach to identify components of the IL-17R complex followed by analysis of their roles using reverse genetics. Besides the identification of LUBAC as an important signal transducing component of IL-17R, we established that IL-17 signaling is regulated by a robust negative feedback loop mediated by TBK1 and IKKε. These kinases terminate IL-17 signaling by phosphorylating the adaptor ACT1 leading to the release of the essential ubiquitin ligase TRAF6 from the complex. NEMO recruits both kinases to the IL-17R complex, documenting that NEMO has an unprecedented negative function in IL-17 signaling, distinct from its role in NF-κB activation. Our study provides a comprehensive view of the molecular events of the IL-17 signal transduction and its regulation.

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Systematic analysis of IL-17 receptor signalosome reveals a robust regulatory feedback loop

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Systematic analysis of IL-17 receptor signalosome reveals a robust regulatory feedback loop

Project description:IL-17 mediates immune protection from fungi and bacteria as well as it promotes autoimmune pathologies. However, the regulation of the signal transduction from the IL-17 receptor (IL-17R) remained elusive. We developed a novel mass spectrometry-based approach to identify components of the IL-17R complex followed by analysis of their roles using reverse genetics. Besides the identification of linear ubiquitin chain assembly complex (LUBAC) as an important signal transducing component of IL-17R, we established that IL-17 signaling is regulated by a robust negative feedback loop mediated by TBK1 and IKK?. These kinases terminate IL-17 signaling by phosphorylating the adaptor ACT1 leading to the release of the essential ubiquitin ligase TRAF6 from the complex. NEMO recruits both kinases to the IL-17R complex, documenting that NEMO has an unprecedented negative function in IL-17 signaling, distinct from its role in NF-?B activation. Our study provides a comprehensive view of the molecular events of the IL-17 signal transduction and its regulation.

| S-SCDT-EMBOJ-2019-104202 | biostudies-other

Systematic analysis of the IL-17 receptor signalosome reveals a robust regulatory feedback loop.

Project description:IL-17 mediates immune protection from fungi and bacteria, as well as it promotes autoimmune pathologies. However, the regulation of the signal transduction from the IL-17 receptor (IL-17R) remained elusive. We developed a novel mass spectrometry-based approach to identify components of the IL-17R complex followed by analysis of their roles using reverse genetics. Besides the identification of linear ubiquitin chain assembly complex (LUBAC) as an important signal transducing component of IL-17R, we established that IL-17 signaling is regulated by a robust negative feedback loop mediated by TBK1 and IKKε. These kinases terminate IL-17 signaling by phosphorylating the adaptor ACT1 leading to the release of the essential ubiquitin ligase TRAF6 from the complex. NEMO recruits both kinases to the IL-17R complex, documenting that NEMO has an unprecedented negative function in IL-17 signaling, distinct from its role in NF-κB activation. Our study provides a comprehensive view of the molecular events of the IL-17 signal transduction and its regulation.

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Project description:Keratinocyte skin cancer, comprising cutaneous squamous (cSCC) and basal cell carcinoma, is the most common malignancy in the UK. P53 is frequently mutated in cSCC. iASPP is a key inhibitor of p53 and NF-kB signalling pathways and has been documented as highly expressed in several types of human cancer. We have previously identified an autoregulatory feedback loop between iASPP and p63, which is critical in epidermal homeostasis. We hypothesised a potential role for dysregulation of this axis in the pathogenesis of keratinocyte malignancies. Immunostaining of 116 cSCC clinical samples revealed increased iASPP and ΔNp63 expression but also highlighted a significant alteration of iASPP cellular localisation, with consequent deregulation of its function. Expression patterns, functionality, gene and microRNA expression analysis were further investigated in 10 cSCC cell lines. Our data suggest that whilst direct effects of iASPP and p63 upon each other’s expression are maintained in cSCC, epigenetic dysregulation of the feedback loop occurs at the microRNA level by a novel mechanism controlling p63 expression. We demonstrate that this autoregulatory feedback loop controls cell migration in cSCC by blocking EMT and promoting proliferation, and provides future directions for clinical biomarker and therapeutic target discovery in cutaneous SCC.

2019-11-20 | GSE123189 | GEO

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