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TRAP from CA1 pyramidal neurons and cerebellar granule cells in Fmr1 KO and wildtype mice

ABSTRACT: TRAP from CA1 pyramidal neurons and cerebellar granule cells in Fmr1 KO and wildtype mice

PROVIDER: PRJNA525640 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR8669190_1.fastq.gz	Fastqsanger.gz
	SRR8669190_2.fastq.gz	Fastqsanger.gz
	SRR8669200_1.fastq.gz	Fastqsanger.gz
	SRR8669200_2.fastq.gz	Fastqsanger.gz
	SRR8669191_1.fastq.gz	Fastqsanger.gz

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TRAP from CA1 pyramidal neurons and cerebellar granule cells in Fmr1 KO and wildtype mice

Project description:TRAP (translating ribosome affinity purification) from CA1 pyramidal neurons and cerebellar granule cells in wildtype and Fmr1 KO littermate pairs. These data show a global downregulation of FMRP targets in Fmr1 KO mice in these cell types.

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Zbtb20-mediated repression of genes in developing CA1 pyramidal neurons

Project description:The transcriptional repressor Zbtb20 is essential for specification of hippocampal CA1 pyramidal neurons. Moreover, ectopic expression of Zbtb20 is sufficient to transform subicular and retrosplenial areas of D6/Zbtb20S mice to CA1. We used microarrays to identify genes that are repressed by Zbtb20 in developing CA1 pyramidal neurons in the CA1-transformed cortex of D6/Zbtb20S mice. For RNA extraction and hybridization on Affymetrix microarrays, we isolated the CA1-transformed subiculum and retrosplenial cortex from postnatal day 1 D6/Zbtb20S mice, as well as corresponding areas from their wildtype littermates. Total RNA was extracted using the RNeasy Lipid Tissue Mini Kit (Qiagen). Each RNA sample represents a pool of RNA obtained from dissected tissues of seven animals.

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RNA-Seq from CA1 pyramidal neurons

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Project description:Comparing WT mice to a mouse model of mental retardation, this work identifies genes which display differences in ribosome-bound mRNAs, in hippocampus CA1 pyramidal cells. These genes products are potent functional components of neuronal plasticity and hippocampus-dependent memory.

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Project description:Maternal RNA degradation is critical for embryogenesis and is tightly controlled by maternal RNA-binding proteins. Fragile X mental-retardation protein (FMR1) binds target mRNAs to form ribonucleoprotein (RNP) complexes/granules that control various biological processes, including early embryogenesis. However, how FMR1 recognizes target mRNAs and how FMR1-RNP granule assembly/disassembly regulates FMR1-associated mRNAs remain elusive. Here we show that Drosophila FMR1 preferentially binds mRNAs containing m6A-marked “AGACU” motif with high affinity to contributes to maternal RNA degradation. The high-affinity binding largely depends on a hydrophobic network within FMR1 KH2 domain. Importantly, this binding greatly induces FMR1 granule condensation to efficiently recruit unmodified mRNAs. The degradation of maternal mRNAs then causes granule de-condensation, allowing normal embryogenesis. Our findings reveal that sequence-specific mRNAs instruct FMR1-RNP granules to undergo a dynamic phase-switch, thus contributes to maternal mRNA decay. This mechanism may represent a general principle that regulated RNP-granules control RNA processing and normal development.

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