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

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

PROVIDER: PRJNA890202 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR21890973_1.fastq.gz	Fastqsanger.gz
	SRR21890973_2.fastq.gz	Fastqsanger.gz
	SRR21890985_1.fastq.gz	Fastqsanger.gz
	SRR21890985_2.fastq.gz	Fastqsanger.gz

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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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