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Identification of RNAs associated with S. cerevisiae or N. crassa Puf3

ABSTRACT: Affinity purification of S. cerevisiae or N. crassa Puf3 from S. cerevisiae cells and identification of associated RNAs by microarray

ORGANISM(S): Saccharomyces cerevisiae

PROVIDER: GSE50996 | GEO | 2015/03/16

SECONDARY ACCESSION(S): PRJNA219495

REPOSITORIES: GEO

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Potential modulation of Puf3 chromatin association mediated by Rpb4

Project description:Gene expression involving RNA polymerase II is regulated by the concerted interplay between mRNA synthesis and degradation, a crosstalk where mRNA decay machinery impacts transcription and transcription machinery influences mRNA stability. Rpb4, and likely the dimer Rpb4/7 seem to be the central components of the RNA pol II governing these processes. Here we investigate the effect of ∆rrp4 on the potential chromatin association of the RNA binding protein Puf3 to chromatin in S. cerevisiae.

2022-11-09 | GSE152093 | GEO

Mass spectrometry data for Leishmania major proteins obtained by immunoprecipitation with anti-PUF1, anti-PUF3 or pre-immunization antibodies.

Project description:This project was aimed to the characterization of proteins interacting with the RNA binding proteins PUF1 and PUF3 of Leishmania major (Friedlin strain). For this purpose an immunoprecipitation (IP) strategy was followed. Firstly, protein extracts from L. major promastigotes were incubated with specific antibodies, raised in rabbits, against recombinant proteins PUF1 or PUF3. In parallel, a control IP using a pre-immune serum was performed. After affinity purification of the antibody-protein complexes, proteins were analyzed by Reverse phase- Liquid Chomatography/Mass spectrometry.

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Analysis of the effect of the deletion of PUF3 gene in yeast

Project description:The Puf family of RNA-binding proteins regulate gene expression by controlling protein synthesis or stimulating RNA decay. Puf3p is one of six related proteins in Saccharomyces cerevisiae characterised as targeting and regulating decay of nuclear-encoded mRNAs specifying mitochondrial proteins. Much prior work has examined how Puf3p regulates COX17 mRNA. We undertook a genome-wide approach to quantitatively assess the impact of loss of PUF3 on gene expression. Comparing transcript levels in wild-type and puf3∆ cells revealed that that only a small fraction of mRNA levels alter, suggesting Puf3p determines mRNA stability for only some target mRNAs.

2016-03-31 | E-MTAB-3407 | biostudies-arrayexpress

Schizosaccharomyces pombe Puf3 interactome

Project description:Puf3 is a RNA-binding protein, a member of the conserved Puf-protein family. Combining different functional genomics data, we have analyzed the role of Puf3 in post-transcriptional gene regulation in S. pombe. We present data on Puf3 interacting proteins and regulatory mRNA targets.

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Saccharomyces cerevisiae

Project description:Identification of RNAs associated with S. cerevisiae or N. crassa Puf3

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Puf3 participates in ribosomal biogenesis in malaria parasites

Project description:Recent studies of the Puf family of RNA-binding proteins revealed that besides their traditional roles in translational regulation of mRNAs, some Puf proteins are also involved in ribosome biogenesis by binding rRNA. In this study, we report the role of a Puf-like protein in Plasmodium falciparum (name as PfPuf3) and its ortholog PyPuf3 in Plasmodium yoelii in ribosome biogenesis. Secondary structure prediction suggested that the RNA-binding domain of Puf3 consists of 11 pumilio repeats, similar to human Puf-A/yeast Puf6, which involved in ribosome biogenesis. Neither pfpuf3 nor pypuf3 could be genetically disrupted, suggesting they may be essential for the intraerythrocytic developmental cycle (IDC). A time-course study of PfPuf3 protein indicated that PfPuf3 was expressed during the entire IDC, with peak expression in early trophozoites. Cellular fractionation of PfPuf3 revealed that it is preferentially partitioned to the nuclear than the cytoplasmic fractions, which is consistent with a nuclear localization of PfPuf3::GFP and PyPuf3::GFP as seen by immunofluorescence. Further, we found PfPuf3 co-localized with a well-known nucleolus maker, PfNop1, demonstrating that PfPuf3 is a nucleolar protein. This localization is in contrast to the cytoplasmic localization of PfPuf1 and PfPuf2, but matches the localization of human Puf-A and yeast Puf6. Affinity purification of an N-terminal PTP-tagged variant of PfPuf3 revealed an association with 32 proteins associated with the 60S ribosome, and an enrichment of 28S rRNA and ITS2. Taken together, these results demonstrate a nucleolar localization of PfPuf3 and suggest an essential function of PfPuf3 in ribosomal biogenesis.

2018-03-11 | GSE105126 | GEO

PUF3 RNAi in bloodstream-form trypanosomes

Project description:PUF3 was depleted by RNAi for 24h in bloodstream-form trypanosomes (Trypanosoma brucei). No effect was seen on the transcriptome.

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Analysis of the effect of PUF3 deletion in mRNA translation in yeast

Project description:The Puf family of RNA-binding proteins regulates gene expression by controlling protein synthesis or stimulating RNA decay. Puf3p is one of six related proteins in Saccharomyces cerevisiae characterised as targeting and regulating decay of nuclear-encoded mRNAs specifying mitochondrial proteins. Much prior work has examined how Puf3p regulates COX17 mRNA. We undertook a genome-wide approach to quantitatively assess the impact of loss of PUF3 on gene expression using polysome profiling. Our translatomic study suggests that loss of Puf3p has widespread, but modest, impact on mRNA translation.

2016-03-31 | E-MTAB-3406 | biostudies-arrayexpress

Pbp1 associates with Puf3 and promotes translation of its target mRNAs involved in mitochondrial biogenesis

Project description:Pbp1 (polyA-binding protein - binding protein 1) is a stress granule marker and polyglutamine expansions in its mammalian ortholog ataxin-2 have been linked to neurodegenerative conditions. Pbp1 was recently shown to form intracellular assemblies that function in the negative regulation of TORC1 signaling under respiratory conditions. Furthermore, it was observed that loss of Pbp1 leads to mitochondrial dysfunction. Here, we show that loss of Pbp1 leads to a specific decrease in mitochondrial proteins whose encoding mRNAs are targets of the RNA-binding protein Puf3, suggesting a functional relationship between Pbp1 and Puf3. We found that Pbp1 stabilizes and promotes the translation of Puf3-target mRNAs in respiratory conditions, such as those involved in the assembly of cytochrome c oxidase. We further show that Pbp1 and Puf3 associate through their respective low complexity domains, which is required for target mRNA stabilization and translation. Our findings reveal a key role for Pbp1-containing assemblies in enabling the translation of mRNAs critical for mitochondrial biogenesis and respiration under metabolically challenging conditions. They may further explain prior associations of Pbp1/ataxin-2 with stress granule biology and RNA metabolism.

2023-05-08 | GSE227356 | GEO

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