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The RNA binding protein HNRNPA2B1 regulates RNA abundance and motor protein activity in neurites

ABSTRACT: The RNA binding protein HNRNPA2B1 regulates RNA abundance and motor protein activity in neurites

PROVIDER: PRJNA1149810 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR30298800_1.fastq.gz	Fastqsanger.gz
	SRR30298800_2.fastq.gz	Fastqsanger.gz
	SRR30298801_1.fastq.gz	Fastqsanger.gz
	SRR30298801_2.fastq.gz	Fastqsanger.gz
	SRR30298802_1.fastq.gz	Fastqsanger.gz

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The RNA binding protein HNRNPA2B1 regulates RNA abundance and motor protein activity in neurites

Project description:RNA molecules are localized to subcellular regions through interactions between localization-regulatory cis-elements and trans-acting RNA binding proteins (RBPs). However, the identities of RNAs whose localization is regulated by a specific RBP as well as the impacts of that RNA localization on cell function have generally remained unknown. Here, we demonstrate that the RBP HNRNPA2B1 acts to keep specific RNAs out of neuronal projections. Using subcellular fractionation, high-throughput sequencing, and single molecule RNA FISH, we find that hundreds of RNAs demonstrate markedly increased abundance in neurites in HNRNPA2B1 knockout cells. These RNAs often encode motor proteins and are enriched for known HNRNPA2B1 binding sites and motifs in their 3′ UTRs. The speed and processivity of microtubule-based transport is impaired in these cells, specifically in their neurites. HNRNPA2B1 point mutations that increase its cytoplasmic abundance relative to wildtype lead to stronger suppression of both RNA mislocalization and transport defects than seen with wildtype HNRNPA2B1. We further find that the subcellular localizations of HNRNPA2B1 target RNAs are sensitive to perturbations of RNA decay machinery, suggesting that it is HNRNPA2B1’s known role in regulating RNA stability that may explain these observations. These findings establish HNRNPA2B1 as a negative regulator of neurite RNA abundance and link the subcellular activities of motor proteins with the subcellular abundance of the RNAs that encode them.

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Nuclear HNRNPA2B1 HITS-CLIP and RNA-seq

Project description:To identify HNRNPA2B1 binding sites on endogenous nuclear RNAs, we performed HITS-CLIP for endogenous HNRNPA2B1 and RNA-seq to analyze the nuclear RNA under either METTL3 or HNRNPA2B1 depletion. Wild type MDA-MB-231 cells were subjected to the HITS-CLIP procedure on immunoprecipitated HNRNPA2B1 associated RNA obtained from the nuclear fraction (Licatalosi D, et al. 2008, Nature 456:464-U22). For RNA-seq, nuclear RNA was extracted from MDA-MB-231 or Hela cells knocked down for METTL3 or HNRNPA2B1.

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The RNA binding protein HNRNPA2B1 regulates IFNG signaling in macrophages

Project description:Heterogeneous nuclear ribonucleoprotein A2B1 (HNRNPA2B1) is a well known RNA binding protein but the mechanisms by which it contributes to innate immune gene regulation is poorly understood. Here we report that HNRNPA2B1 functions in macrophages to regulate IFNG signaling through alternative splicing of the IFNG receptor. Specific deletion of HNRNPA2B1 in macrophages using our newly developed conditional mice crossed to LysMCre resulted in altered cytokine responses in both an endotoxic shock model and following Salmonella infection. Interestingly, while HNRNPA2B1 can function as a viability gene, we observed increased macrophage and neutrophil numbers in the KO mice following LPS induced endotoxic shock. HNRNPA2B1 KO mice were more susceptible to Salmonella and Mycobacterium Tuberculosis infections and failed to effectively clear the pathogens. Mechanistically, loss of HNRNPA2B1 resulted in an increase in No-GO transcripts of the IFNG receptor (Ifngr) leading to lower expression of the receptor at the cell surface impacting the downstream IFNG signaling cascade. Collectively, our data highlights an important role for HNRNPA2B1 in regulating IFNG signaling in macrophages.

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