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Analysis of RNA coimmunoprecipitated with 3xFLAG-tagged peptide peTrpL from Sinorhizobium meliloti

ABSTRACT: We show that specific RNAs are coimmunoprecipitated in a tetracycline-dependent manner with the Flag-tagged peptide peTrpL of S. meliloti

ORGANISM(S): Sinorhizobium meliloti

PROVIDER: GSE118688 | GEO | 2020/05/18

REPOSITORIES: GEO

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Analysis of RNA coimmunoprecipitated with 3xFLAG-tagged peptide peTrpL from Sinorhizobium meliloti

Project description:Analysis of RNA coimmunoprecipitated with 3xFLAG-tagged peptide peTrpL from Sinorhizobium meliloti

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RNA-seq of S. meliloti strain ectopically overexpressing trpL and RIP-seq with 3xFLAG-tagged peptide peTrpL from S. meliloti

Project description:RNA-seq of S. meliloti strain ectopically overexpressing trpL and RIP-seq with 3xFLAG-tagged peptide peTrpL from S. meliloti

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Transcriptome analysis of Sinorhizobium meliloti strain ectopically overexpressing trpL

Project description:We show that the RNA leves of many genes in the S. meliloti overexpressing strain (OE) 2011 (pRK-RcsR1) are more similar to the levels of in wild type (WT) strain 2011 than in the empty vector control (EVC) strain 2011(pRK4352). Since the plasmid-containing strains were grown in the presence of 10 µg/ml tetracycline (Tc), while the WT was grown without Tc, the results suggest that the intrecellular Tc concentration in the OE strain are lower than in the EVC. This is explained by an increased efflux pump activity in the OE strain.

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Host plant peptides elicit a transcriptional response to control the Sinorhizobium meliloti cell cycle during symbiosis

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Project description:Sinorhizobium meliloti, a facultative microsymbiont of alfalfa, should fine-tune its cellular processes to live saprophytically in soils characterized with limited nutrients and diverse stresses. In this study, TiO2 enrichment and LC-MS/MS were used to uncover the site-specific Ser/Thr/Tyr phosphoproteome of S. meliloti in minimum medium at stationary phase. There are a total of 96 unique phosphorylated sites, with a Ser/Thr/Tyr distribution of 65:32:5, in 78 proteins. Phosphoproteins identified in S. meliloti showed a wide distribution pattern regarding to functional categories, such as replication, transcription, translation, posttranslational modification, transport and metabolism of amino acids, carbohydrate, inorganic ion, succinoglycan etc. Ser/Thr/Tyr phosphosites identified within the conserved motif in proteins of key cellular function indicate a crucial role of phosphorylation in modulating cellular physiology. Moreover, phosphorylation events potentially involved in rhizobial adaptation to diverse stresses were also discussed, such as those identified in SMa0114 and PhaP2 (polyhydroxybutyrate synthesis), ActR (pH stress and microaerobic adaption), SupA (potassium stress), chaperonin GroEL2 (viability and potentially symbiosis), and ExoP (succinoglycan synthesis and secretion). These Ser/Thr/Tyr phosphosites identified herein would be helpful for our further investigation and understanding of the role of phosphorylation in rhizobial physiology.

2015-10-05 | PXD002064 | Pride

Dual RpoH sigma factors in Sinorhizobium meliloti

Project description:Sinorhizobium meliloti can live as a soil saprophyte, and can engage in a nitrogen fixing symbiosis with plant roots. To succeed in such diverse environments, the bacteria must continually adjust gene expression. Transcriptional plasticity in eubacteria is often mediated by alternative sigma factors interacting with core RNA polymerase. The S. meliloti genome encodes 14 of these alternative sigmas, including two putative RpoH (heat shock) sigmas. We used custom Affymetrix Symbiosis Chips to characterize the global transcriptional response of S. meliloti rpoH1, rpoH2 and rpoH1 rpoH2 mutants during heat shock and stationary phase growth. Under these conditions, expression of over 300 genes is dependent on rpoH1 and rpoH2.

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FLAG-tagged FOXM1A Plasmid

Project description:FLAG-tagged FOXM1A Plasmid

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Identification of RpoE2 target genes in Sinorhizobium meliloti

Project description:Sinorhizobium meliloti lives as a soil saprophyte, and engages in a nitrogen fixing symbiosis with plant roots. To succeed in such diverse environments, the bacteria must continually adjust gene expression. Transcriptional plasticity in eubacteria is often mediated by alternative sigma factors interacting with core RNA polymerase. The S. meliloti genome encodes 14 of these alternative sigmas, including 11 extracytoplasmic function (ECF) sigmas. We used custom Affymetrix Symbiosis Chips to characterize the global transcriptional response of S. meliloti overexpressing the ECF sigma factor, RpoE2. Our work identifies over 200 genes whose expression is dependent on RpoE2.

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Host plant peptides elicit a transcriptional response to control the Sinorhizobium meliloti cell cycle during symbiosis

Project description:We profiled gene expression in synchronized cultures of Sinorhizobium meliloti treated with or without the nodule-specific cysteine-rich peptide 247. We compared gene expression between the two conditions at 5 timepoints (15, 30, 60, 90, 120) following the addition of the peptide A population of synchronized Sinorhizobium meliloti was subjected to two treatments (no treatment and treated with sublethal levels of the NCR247 peptide). A series of timepoints was taken to profile the gene expression in both populations.

2014-01-21 | E-GEOD-54244 | biostudies-arrayexpress

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Project description:The Alphaproteobacterium Sinorhizobium meliloti lives in soil and is capable of fixing molecular nitrogen in symbiosis with legume plants. In this work, the small proteome of S. meliloti strain 2011 was studied to uncover translation of both annotated and novel small open reading frame (sORF)-encoded proteins (SEPs).

2023-03-13 | PXD034931 | Pride

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