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The intrinsically disordered region of SPIN1 regulates its function by phase separation [ChIP-seq]

ABSTRACT: The intrinsically disordered region of SPIN1 regulates its function by phase separation [ChIP-seq]

PROVIDER: PRJNA890209 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR21890982_1.fastq.gz	Fastqsanger.gz
	SRR21890982_2.fastq.gz	Fastqsanger.gz
	SRR21890983_1.fastq.gz	Fastqsanger.gz
	SRR21890983_2.fastq.gz	Fastqsanger.gz
	SRR21890984_1.fastq.gz	Fastqsanger.gz

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The intrinsically disordered region of SPIN1 regulates its function by phase separation.

Project description:The intrinsically disordered region of SPIN1 regulates its function by phase separation.

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The intrinsically disordered region of SPIN1 regulates its function by phase separation [RNA-seq]

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The intrinsically disordered region of SPIN1 regulates its function by phase separation [ChIP-seq]

Project description:As a transcriptional coactivator, SPIN1 has been reported to bind to chromatin.To assess the effect of IDR on chromatin binding, we investigated genome-wide chromatin association of SPIN1-WT or SPIN1-△IDR stably overexpressed cell lines by chromatin immunoprecipitation followed by high-throughput sequencing.

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The intrinsically disordered region of SPIN1 regulates its function by phase separation.

Project description:This SuperSeries is composed of the SubSeries listed below.

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The intrinsically disordered region of SPIN1 regulates its function by phase separation [RNA-seq]

Project description:To further assess the role for IDR in target gene regulation, we performed transcriptome analysis by RNA sequencing (RNA-seq).

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Aberrant phase separation of transcription factors in human developmental disorders

Project description:Components of the transcription machinery can undergo liquid-liquid phase separation, but the functional importance of phase-separated condensates in transcriptional control is not well understood. Here we report that disease-causing mutations in several transcription factors (TFs) alter the phase separation capacity of those TFs. We first demonstrate that the Hoxd13 TF, and its intrinsically disordered N-terminus form phase-separated condensates. Expansions of a polyalanine repeat, which cause hereditary synpolydactyly in humans, facilitate phase separation of Hoxd13, and alter the transcriptional program of several cell types in a cell-specific manner in vivo. Disease-associated expansions of aminoacid repeats in intrinsically disordered regions of other TFs were similarly found to alter phase separation. These results suggest that aberrant phase separation of transcriptional regulators may underlie a spectrum of human pathologies. The paper is available at https://doi.org/10.1016/j.cell.2020.04.018

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Replication licensing regulated by an intrinsically disordered region of origin recognition complex

Project description:Replication licensing regulated by an intrinsically disordered region of origin recognition complex

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Phase separation propensity of the intrinsically disordered AB region of human RXRβ.

Project description:RXRβ is one of three subtypes of human retinoid X receptor (RXR), a transcription factor that belongs to the nuclear receptor superfamily. Its expression can be detected in almost all tissues. In contrast to other subtypes - RXRα and RXRγ - RXRβ has the longest and unique N-terminal sequence called the AB region, which harbors a ligand-independent activation function. In contrast to the functional properties of this sequence, the molecular properties of the AB region of human RXRβ (AB_hRXRB) have not yet been characterized. Here, we present a systematic biochemical and biophysical analysis of recombinant AB_hRXRB, along with in silico examinations, which demonstrate that AB_hRXRB exhibits properties of a coil-like intrinsically disordered region. AB_hRXRB possesses a flexible structure that is able to adopt a more ordered conformation under the influence of different environmental factors. Interestingly, AB_hRXRB promotes the formation of liquid-liquid phase separation (LLPS), a phenomenon previously observed for the AB region of another human subtype of RXR - RXRγ (AB_hRXRG). Although both AB regions seem to be similar in terms of their ability to induce phase separation, they clearly differ in the sensitivity to factors driving and regulating LLPS. This distinct LLPS response to environmental factors driven by the unique amino acid compositions of AB_hRXRB and AB_hRXRG can be significant for the specific modulation of the transcriptional activation of target genes by different subtypes of RXR. Video Abstract.

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Intrinsically disordered regions regulate RhlE RNA helicase functions in bacteria

Project description:RNA helicases—central enzymes in RNA metabolism— often feature intrinsically disordered regions (IDRs) that enable phase separation and complex interactions with other proteins and/or RNA molecules. IDRs are varied and fast evolving, which makes their function hard to predict. In the bacterial pathogen Pseudomonas aeruginosa, two non-redundant RNA helicases, RhlE1 and RhlE2, share a conserved REC catalytic core but have different C-terminal extensions (CTEs) composed of IDRs of diverse length and amino acid composition. Here, we show how the IDR diversity defines RhlE RNA helicase specificity of function. Both CTEs facilitate RNA binding and phase separation in vitro, leading to the in vivo localization of proteins in clusters within the cytoplasm. However, the CTE of RhlE2 is more efficient in enhancing REC core RNA unwinding, exhibits a greater tendency for phase separation, and interacts with the RNase E endonuclease, a crucial player in mRNA degradation. Swapping CTEs results in chimeric proteins that are biochemically active but functionally distinct as compared to their native counterparts. The RECRhlE1-CTERhlE2 chimera improves cold growth of a rhlE1 mutant, gains interaction with RNase E and affects a subset of both RhlE1 and RhlE2 RNA targets. The RECRhlE2-CTERhlE1 chimera instead hampers bacterial growth at low temperatures in the absence of RhlE1, with its detrimental effect linked to aberrant RNA droplets. By showing that IDRs modulate both protein core activities and subcellular localization, our study defines the impact of IDR diversity on the functional differentiation of RNA helicases.

2024-05-30 | GSE253333 | GEO

Regulation of Src tumor activity by its N-terminal intrinsically disordered region

Project description:The membrane anchored Src tyrosine kinase is involved in numerous pathways and its deregulation is involved in human cancer. Our knowledge on Src regulation relies on crystallography, which revealed intramolecular interactions to control active Src conformations. However, Src contains a N-terminal intrinsically disordered unique domain (UD) whose function remains unclear. Using NMR, we reported that UD forms an intramolecular fuzzy complex involving a conserved region with lipid-binding capacity named Unique Lipid Binding Region (ULBR), which could modulate Src membrane anchoring. Here we show that the ULBR is essential for Src’s oncogenic capacity. ULBR inactive mutations inhibited Src transforming activity in NIH3T3 cells and in human colon cancer cells. It also reduced Src-induced tumor development in nude mice. An intact ULBR was required for MAPK signaling without affecting Src kinase activity nor sub-cellular localization. Phospho-proteomic analyses revealed that, while not impacting on the global tyrosine phospho-proteome in colon cancer cells, this region modulates phosphorylation of specific membrane-localized tyrosine kinases needed for Src oncogenic signaling, including EPHA2 and Fyn. Collectively, this study reveals an important role of this intrinsically disordered region in malignant cell transformation and suggests a novel layer of Src regulation by this unique region via membrane substrate phosphorylation.

2022-01-14 | PXD030006 | Pride

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