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Genome-wide CRISPR-Cas9 interrogation of splicing networks reveals a mechanism for recognition of autism-misregulated neuronal microexons [RNA-seq]

ABSTRACT: Genome-wide CRISPR-Cas9 interrogation of splicing networks reveals a mechanism for recognition of autism-misregulated neuronal microexons [RNA-seq]

PROVIDER: PRJNA448433 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR6927123.fastq.gz	Fastqsanger.gz
	SRR6927123_1.fastq.gz	Fastqsanger.gz
	SRR6927123_2.fastq.gz	Fastqsanger.gz
	SRR6927124.fastq.gz	Fastqsanger.gz
	SRR6927124_1.fastq.gz	Fastqsanger.gz

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Genome-wide CRISPR-Cas9 interrogation of splicing networks reveals a mechanism for recognition of autism-misregulated neuronal microexons

Project description:Genome-wide CRISPR-Cas9 interrogation of splicing networks reveals a mechanism for recognition of autism-misregulated neuronal microexons

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Genome-wide CRISPR-Cas9 interrogation of splicing networks reveals a mechanism for recognition of autism-misregulated neuronal microexons [SPAR-seq]

Project description:Alternative splicing has critical roles in diverse cellular, developmental and pathological processes. However, the full repertoires of factors that control individual splicing events are not known. We describe a CRISPR-based screening strategy for the systematic identification of genes that control 3-27 nt microexons with functions in nervous system development and that are commonly disrupted in autism. Besides known regulators including nSR100/Srrm4, Rbfox and Ptbp1, approximately 200 additional genes impact microexon splicing. These genes are enriched in genetic links to autism. Two of the screen hits, Srsf11 and Rnps1, preferentially regulate Srrm4-dependent microexons relative to other exons. These factors form mutually stabilizing interactions with Srrm4 that bridge upstream intronic enhancer elements and exonic sequences to activate microexon splicing. Our study thus presents a system for the genome-wide definition of splicing regulatory networks and further reveals a mechanism for the recognition of microexons with critical roles in nervous system development and disorders.

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Genome-wide CRISPR-Cas9 interrogation of splicing networks reveals a mechanism for recognition of autism-misregulated neuronal microexons [RNA-seq]

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Genome-wide CRISPR-Cas9 interrogation of splicing networks reveals a mechanism for recognition of autism-misregulated neuronal microexons [CRISPR screen]

Project description:Genome-wide CRISPR-Cas9 interrogation of splicing networks reveals a mechanism for recognition of autism-misregulated neuronal microexons [CRISPR screen]

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Genome-wide CRISPR-Cas9 interrogation of splicing networks reveals a mechanism for recognition of autism-misregulated neuronal microexons [CLIP-seq]

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Autism-misregulated eIF4G microexons control synaptic translation and higher-order cognitive functions [Ribo-Seq]

Project description:Microexons represent the most highly conserved class of alternative splicing, yet their functions are poorly understood. Here, we focus on closely related neuronal microexons overlapping prion-like domains in the translation initiation factors, eIF4G1 and eIF4G3, the splicing of which is activity-dependent and frequently disrupted in autism. CRISPR-Cas9 deletion of these microexons selectively up-regulates synaptic proteins that control neuronal activity and plasticity and further triggers a gene expression program mirroring that of activated neurons. Mice lacking the Eif4g1 microexon display social behavior, learning and memory deficits, as well as alterations in hippocampal synaptic plasticity. The eIF4G microexons appear to reduce synaptic protein synthesis by causing ribosome stalling, through a mechanism whereby they promote the coalescence of cytoplasmic granule components associated with translation repression, including the Fragile X mental retardation protein, FMRP. The results thus reveal an autism-disrupted mechanism by which alternative splicing specializes translation to control higher-order cognitive functioning.

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