Browse
Submit Data
Databases
API
Help

Unknown,Transcriptomics,Genomics,Proteomics

Dataset Information

0 Views

0 Connections

0 Citations

0 Reanalyses

0 Downloads

Omics score: 0

Expression data from Sinorhizobium meliloti strains Rm8530 and Rm8530 mucR.

ABSTRACT: We used microarrays to analyze the effects of the disruption of mucR in planktonic S. meliloti strain Rm8530. S. meliloti were grown in minimal low-phosphate media to OD600 = 1.2 for RNA extraction and hybridization on Affymetrix microarrays.

ORGANISM(S): Sinorhizobium meliloti

SUBMITTER: Juan González

PROVIDER: E-GEOD-23721 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

ACCESS DATA

Json Xml

Similar Datasets

The small proteome of the nitrogen-fixing plant symbiont Sinorhizobium meliloti

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

Sinorhizobium meliloti Ser/Thr/Tyr phosphoproteome

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

Directional RNA sequencing of mRNA from Sinorhizobium meliloti cells grown with limiting phosphate and with excess phosphate.

Project description:Analysis of the RNA-seq reads confirmed that transcription of many of the previously identified Pho-regulon genes of Sinorhizobium meliloti was regulated by the availability of inorganic phosphate in the media. The transcriptional start sites of many of the Pho-regulon genes as determined by RNA-seq reads were found to correspond to those determined from primer extension analysis. mRNA from S. meliloti RmP110 grown in MOPS + 2 mM Pi and MOPS + 20 M-BM-5M Pi M-bM-^@M-^S directional RNA-seq via Illumina sequencing

2013-06-01 | E-GEOD-43558 | biostudies-arrayexpress

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.

2012-10-02 | GSE36186 | GEO

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.

2013-07-22 | GSE40391 | GEO

Expression data of Medicago truncatula skl1-1 roots treated with S. meliloti wild-type or auxin transport inhibitors

Project description:Rhizobium and allied bacteria form symbiotic nitrogen-fixing nodules on legume roots. Plant hormones appear to play a role in nodule formation. We treated Medicago truncatula roots with auxin transport inhibitors (ATIs) N-(1-naphthyl)phthalamic acid (NPA) and 2,3,5-triiodobenzoic acid (TIBA) to induce the formation of pseudonodules. We compared the transcriptional responses of M. truncatula roots treated with ATIs to roots inoculated with Sinorhizobium meliloti. The transcriptional response of M. truncatula roots 1 and 7 days after ATI treatment were opposite to roots treated with S. meliloti. Three independent biological replicates were performed for each treatment (buffer, ATI and wild-type bacteria) at 21 days after treatment.

2011-03-25 | E-GEOD-28172 | biostudies-arrayexpress

Transcription profiling of S. meliloti tolC mutant

Project description:Effect of the deletion of tolC on S. meliloti physiology under free-living conditions

2010-07-01 | E-MEXP-2561 | biostudies-arrayexpress

Single-nucleotide variant and marker frequency analysis of Sinorhizobium meliloti strains with rearranged genomic DNA

Project description:S. meliloti strains with a bi- and monopartite genome configuration were constructed by consecutive Cre/lox-mediated site-specific fusions of the secondary replicons. Beside the correct genomic arrangements, these strains and precursors were tested for variations in the nucleotide sequence. Futher, a marker fequency analysis was performed to test if replication is initiated at all origins and to determine the replication termination regions of the triple replicon fusion molecule. To gain the sequence data for these analyses, respective strains were applied to whole genome sequencing using an Illumina MiSeq-System and Oxford Nanopore (MinION) sequencing technology.

2024-09-30 | E-MTAB-11878 | biostudies-arrayexpress

Overexpression of Sinorhizobium meliloti ECF sigma factors.

Project description:We characterized transcriptomes for strains overexpressing each of the Sinorhizobium meliloti ECF sigma factors the via a plasmid-borne, melibiose-inducible promoter plasmid (PmelA; pCAP11: Pinedo et al. 2008 J Bacteriol 190:2947-2956) compared to control strains carrying the empty vector.

2018-09-05 | GSE116665 | GEO

Novel genes and regulators for cell surface of Sinorhizobium meliloti.

Project description:We characterized the transcriptome of a Sinorhizobium meliloti emmA insertion mutant strain.

2017-11-30 | GSE100707 | GEO