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MRNA interactome in mouse macrophages

ABSTRACT: Proteins interacting with mRNA in mouse macrophages were identified by crosslinking and oligodT capture. Differential interaction was investigated in macrophages before and after treatment with LPS.

INSTRUMENT(S): LTQ Orbitrap Velos

ORGANISM(S): Mus Musculus (mouse)

TISSUE(S): Macrophage

SUBMITTER: Sophia Foehr

LAB HEAD: Jeroen Krijgsveld

PROVIDER: PXD002890 | Pride | 2016-06-13

REPOSITORIES: Pride

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			Action	DRS
	120930_SF_M1_10_10.raw	Raw
	120930_SF_M1_11_10.raw	Raw
	120930_SF_M1_12_10.raw	Raw
	120930_SF_M1_1_10.raw	Raw
	120930_SF_M1_2_10.raw	Raw

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1 - 5 of 25

Publications

Identification of RNA-binding Proteins in Macrophages by Interactome Capture.

Liepelt Anke A Naarmann-de Vries Isabel S IS Simons Nadine N Eichelbaum Katrin K Föhr Sophia S Archer Stuart K SK Castello Alfredo A Usadel Björn B Krijgsveld Jeroen J Preiss Thomas T Marx Gernot G Hentze Matthias W MW Ostareck Dirk H DH Ostareck-Lederer Antje A

Molecular & cellular proteomics : MCP 20160608 8

Pathogen components, such as lipopolysaccharides of Gram-negative bacteria that activate Toll-like receptor 4, induce mitogen activated protein kinases and NFκB through different downstream pathways to stimulate pro- and anti-inflammatory cytokine expression. Importantly, post-transcriptional control of the expression of Toll-like receptor 4 downstream signaling molecules contributes to the tight regulation of inflammatory cytokine synthesis in macrophages. Emerging evidence highlights the role ...[more]

PMID: 27281784

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mRNA binding - Insights into RNA biology from an atlas of mammalian mRNA-binding proteins

Project description:RNA-binding proteins (RBPs) determine RNA fate from synthesis to decay. Employing two complementary protocols for covalent UV crosslinking of RBPs to RNA, we describe a systematic, unbiased, and comprehensive approach, termed "interactome capture," to define the mRNA interactome of proliferating human HeLa cells. We identify 860 proteins that qualify as RBPs by biochemical and statistical criteria, adding more than 300 RBPs to those previously known and shedding light on RBPs in disease, RNA-binding enzymes of intermediary metabolism, RNA-binding kinases, and RNA-binding architectures. Unexpectedly, we find that many proteins of the HeLa mRNA interactome are highly intrinsically disordered and enriched in short repetitive amino acid motifs. Interactome capture is broadly applicable to study mRNA interactome composition and dynamics in varied biological settings.

2015-09-11 | PXD002880 | Pride

Transcriptome-wide Identification of Single-stranded RNA Binding Proteins

Project description:sinle-stranded RNA binding proteins were identified using DIA MS with the asist of RNA seconderay structure specific probe

2023-05-10 | PXD038757 | Pride

Protein-RNA interaction dynamics downstream of KRAS activation reveals key regulators of oncogenic KRAS driven cancers.

Project description:Oncogenic KRAS mutations rewires cellular signaling, leading to significant alterations in gene expression. RNA-binding proteins (RBPs) play a pivotal role in gene expression regulation by post-transcriptionally controlling various aspects of RNA metabolism. It becomes clear that interactions between RBPs and RNA are frequently dysregulated in numerous cancers. However, how the oncogenic KRAS mutations reshape the post-transcriptional regulatory network mediated by RBPs remain poorly understood. In this study, we have systematically dissected oncogenic KRAS driven alternation of RNA-RBP networks. We identified several cancer-associated RBPs with either increased or decreased RNA binding upon oncogenic KRAS, including PDCD11, which is essential for the viability of KRAS mutant cancers, and ELAVL2, which regulates SNAIL and affects cell migration in KRAS mutant lung cancers. Our study serves as a crucial resource for elucidating RBP regulatory networks in KRAS mutant cancers and may provide new avenues for therapeutic strategies targeting KRAS mutant malignancies.

2025-05-07 | PXD053310 | Pride

mRNA-binding proteins of Leishmania donovani LC-MSMS

Project description:Leishmania are unicellular eukaryotes responsible for leishmaniasis in humans. Like other trypanosomatids, leishmania regulate protein coding gene expression almost exclusively at the post-transcriptional level with the help of RNA binding proteins (RBPs). Due to the presence of polycystronic transcription units, leishmania do not regulate RNA polymerase II-dependent transcription initiation. Recent evidence suggests that the main control points in gene expression are mRNA degradation and translation. Protein-RNA interactions are involved in every aspect of RNA biology, such as mRNA splicing, polyadenylation, localization, degradation, and translation. A detailed picture of these interactions would likely prove to be highly informative in understanding leishmania biology and virulence. We developed a strategy involving covalent UV cross-linking of RBPs to mRNA in vivo, followed by interactome capture using oligo(dT) magnetic beads to define comprehensively the mRNA interactome of growing L. donovani amastigotes. The protein mass spectrometry analysis of captured proteins identified 81 mRNA interacting proteins which withstood very stringent washing conditions. Strikingly, we found that 49 of these mRNA interacting proteins had no orthologs or homologs in the human genome. Consequently, these may represent high quality candidates for selective drug targeting leading to novel therapeutics. These results show that this unbiased, systematic strategy has the promise to be applicable to study the mRNA interactome during various biological settings such as metabolic changes, stress (low pH environment, oxidative stress and nutrient deprivation) or drug treatment.

2017-02-08 | PXD005601 | Pride

Global analysis of differential polyadenylation of mRNAs during mitotic cell cycle: S phase versus G2/M phase.

Project description:We compared the poly(A) tail length status of mRNAs of HeLa cells between two phases of the mitotic cell cycle: S and G2/M phases. Hundreds of mRNAs were found to be regulated by changes in their poly(A) tail length during mitotic cell cycle in a phase specific manner. Many of these differentially polyadenylated mRNAs encode proteins related to cell death, cell cycle and cellular growth and proliferation. HeLa cells were synchronized with double thymidine blockade (12 hours with 2 mM thymidine, 12 hours release, and 12 hours with 2 mM thymidine), and samples were taken after 2 hours release (S phase) and 8 hours release (G2/M phase). For each condition total RNA was purified by two different procedures: poly(U) chromatography and oligo(dT)-chromatography. Poly(U)-chromatography (Jacobson, 1987): 100 Î¼g of total RNA were bound to poly(U)-sepharose (Sigma) and eluted at 35ÂºC to isolate mRNAs with short poly(A) tail (<30As, SHORT fraction). Oligo(dT) chromatography: mRNAs were purified independently of their poly(A) tail length with Ambion Poly(A)Purist kit from 20 Î¼g total RNA (ALL fraction). Jacobson, A. Purification and fractionation of poly(A)+ RNA. Methods in Enzymology (1987) 152: 254-261. Keywords: time course Comparison of ALL fraction mRNAs and SHORT fraction mRNAs measured after 2 hours (S phase) and 8 hours release (G2/M) from double thymidine blockade; 3 biological replicates at each of the two time points; two technical replicates with dye swapping per comparison.

2010-05-07 | E-GEOD-15399 | biostudies-arrayexpress

Transcription profiling of mouse Pac1+/+ versus Pac1-/- TG-macrophages treated with LPS - 6h

Project description:LPS-stimulated macrophages from Pac1+/+ and Pac1-/- mice were compared to assess gene expression changes in the absence of PAC-1 (also known as Dual specificity phosphatase 2). Experiment Overall Design: Age matched Pac1+/+ and Pac1-/- littermates were used to obtain equal numbers of thiolycollate-elicited macrophages. Pure populations of macrophages were stimulated with 100 ng/ml of LPS for 6 hours. 6 hours was chosen to assess mainly inflammatory gene expression.

2008-06-12 | E-GEOD-3993 | biostudies-arrayexpress

Serial interactome capture of the human cell nucleus

Project description:Novel RNA-guided cellular functions are paralleled by an increasing number of RNA binding proteins (RBPs). We present “serial interactome capture” (serIC), a multiple purification procedure of UV-crosslinked poly(A)-RNA-protein complexes that enables global RBP detection with maximal specificity. We apply serIC to nuclei of proliferating K562 cells to obtain the first human nuclear interactome. The domain composition of the 382 identified nuclear RBPs markedly differs from previous IC experiments, including fewer factors without known RNA binding domains that are in better agreement with computationally predicted RNA binding. serIC extends the number of DNA-RNA binding proteins (DRBPs), and reveals a network of RBPs involved in p53 signaling and double strand break repair. serIC is an effective tool to couple global RBP capture with additional selection or labelling steps for specific detection of highly purified RBPs. The nuclear interactome presented here is a stepping-stone towards deciphering of the functional RNA-protein network in the mammalian nucleus.

2016-03-31 | PXD003664 | Pride

RNA binding proteins modification by drought stress

Project description:RNA-binding proteins are increasingly recognized as regulatory component of post-transcriptional gene expression. RBPs interact with mRNAs via RNA-binding domains and these interactions affect RNA availability for translation, RNA stability and turn-over thus affecting both RNA and protein expression essential for developmental and stimulus specific responses. Here we investigate the effect of severe drought stress on the RNA-binding proteome to gain insights into the mechanisms that govern drought stress responses at the systems level

2020-05-27 | PXD016883 | Pride

TMT MS RAPIDASH of Mouse macrophages.

Project description:Here we are using TMT-based proteomic analysis to characterize changes in the protein content of ribosomal complexes in LPS or poly(I:C) treated vs naive murine macrophages.

2025-01-13 | PXD055155 | Pride

Transcription profiling of mouse naive and tolerant macrophages stimulated with LPS

Project description:The inflammatory response initiated by microbial products signaling through Toll-like receptors (TLRs) of the innate immune system is essential for host defense against infection. Because inflammation can be harmful to host tissues, the innate response is highly regulated. Negative regulation of TLR4, the receptor for bacterial lipopolysaccharide (LPS), results in LPS tolerance, defined as hyporesponsiveness to repeated stimulation with LPS. LPS tolerance is thought to protect the host from excessive inflammation by turning off TLR4 signal, which then shuts down TLR-induced genes. However, TLR signaling induces hundreds of genes with very different functions. We reasoned that genes with different functions should have different requirements for regulation. Specifically, genes encoding proinflammatory mediators should be transiently inactivated to limit tissue damage, while genes encoding antimicrobial effectors, which directly target pathogens, should remain inducible in tolerant cells to protect the host from infection. Using an in vitro system of LPS tolerance in macrophages, here we show that TLR-induced genes may indeed be divided into two distinct categories based on their functions and regulatory requirements. Further, we show these distinct groups are regulated by gene-specific, and not signal-specific mechanisms. Experiment Overall Design: We examined gene expression using affymetrix genechips in 3 groups of murine bone-marrow derived macrophages: Naive (untreated), Naive stimulated with LPS, and Tolerant stimulated with LPS. Two biological replicates were performed for each group.

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