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Nostoc punctiforme

ABSTRACT: Molecular characterization of genes involved in heterocyst differentiation in Nostoc strain

PROVIDER: PRJNA1102940 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR28976515_1.fastq.gz	Fastqsanger.gz
	SRR28976515_2.fastq.gz	Fastqsanger.gz
	SRR28976516_1.fastq.gz	Fastqsanger.gz
	SRR28976516_2.fastq.gz	Fastqsanger.gz
	SRR28974872_1.fastq.gz	Fastqsanger.gz

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Nostoc punctiforme

Project description:Molecular characterization of genes involved in heterocyst differentiation in Nostoc strain

| PRJNA1227693 | ENA

Comparative transcriptomics of wild-type (Nostoc punctiforme ATCC 29133) and hmpD-deletion strains (UCD 543) of Nostoc punctiforme ATCC 29133

Project description:Change in gene expression for a wild-type (Nostoc punctiforme ATCC 29133) and hmpD-deletion strain (UCD 543) of Nostoc punctiforme ATCC 29133 over the time course of hormogonium development This study is further descirbed in Risser, D.D. and Meeks, J.C. 2013. Comparative transcriptomics with a motility deficient mutant leads to identification of a novel polysaccharide secretion system in Nostoc punctiforme. Molecular Microbiology

2013-01-01 | GSE42859 | GEO

Comparative transcriptomics of wild-type (UCD 153) and patN-deletion strains (UCD 524) of Nostoc punctiforme ATCC 29133

Project description:Heterocysts, cells specialized for nitrogen fixation in certain filamentous cyanobacteria, appear singly in a nonrandom spacing pattern along the chain of vegetative cells. A two-stage, biased initiation and competitive resolution model has been proposed to explain the establishment of this spacing pattern. There is substantial evidence that competitive resolution of a subset of cells initiating differentiation occurs by interactions between a self enhancing activator, HetR, and a diffusible inhibitor PatS-5 (RGSGR). Results presented here show that the absence of a unique membrane protein, PatN, in Nostoc punctiforme strain ATCC 29133 leads to a threefold increase in heterocyst frequency and a fourfold decrease in the vegetative cell interval between heterocysts. A PatN-GFP translational fusion shows a pattern of biased inheritance in daughter vegetative cells of ammonium-grown cultures. Inactivation of another heterocyst patterning gene, patA, is epistatic to inactivation of patN, and transcription of patA increases in a patN- deletion strain, implying that patN may function by modulating levels of patA. The presence of PatN is hypothesized to decrease the competency of a vegetative cell to initiate heterocyst differentiation, and the cellular concentration of PatN is dependent on cell division that results in cells transiently depleted of PatN. We suggest that biased inheritance of cell-fate determinants is a phylogenetic domain- spanning paradigm in the development of biological patterns. Change in gene expression for a wild-type (UCD 153) and patN-deletion strain, (UCD 524) of Nostoc punctiforme ATCC 29133 over the time course of heterocyst developments. Total RNA from 3 biological replicates at each time point from 0 to 120 hours after removal of combined nitrogen (Nitrogen step-down) was converted to cDNA, dye-labled and hybridized to nimblegen 12x135k array slides.

2012-10-01 | E-GEOD-40250 | biostudies-arrayexpress

Comparative transcriptomics of wild-type (Nostoc punctiforme ATCC 29133) and hmpD-deletion strains (UCD 543) of Nostoc punctiforme ATCC 29133

2013-01-01 | E-GEOD-42859 | biostudies-arrayexpress

Comparative transcriptomics of wild-type (UCD 153) and patN-deletion strains (UCD 524) of Nostoc punctiforme ATCC 29133

2012-10-01 | GSE40250 | GEO

Nostoc punctiforme

Project description:Benefits of Nostoc microbiome on the host cyanobacterium

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The cyanobacterium, Nostoc punctiforme can protect against programmed cell death and induce defence genes in Arabidopsis thaliana.

Project description:Many cyanobacteria can form nitrogen-fixing symbioses with a broad range of plant species. Unlike other plant-bacteria symbioses, little is understood about the immunological responses induced by plant cyanobionts (symbiotic cyanobacteria). Here, we used Arabidopsis thaliana suspension cell cultures as a model system to demonstrate that the model plant-symbiotic cyanobacteria, Nostoc punctiforme is capable of protecting against plant programmed cell death (PCD). We also profiled the early transcriptomic changes that were induced in response to conditioned medium (CM) from N. punctiforme cell cultures. Interestingly, the PCD reduction was preceded by the induction of genes associated with defence and immunity, the most striking of which were a number of WRKY-family transcription factors. Down-regulated included genes involved in the regulation of cell growth and differentiation. This work is the first to show that a cyanobacteria can regulate plant PCD and provides a useful transcriptome resource for studying early plant cell responses to symbiotic cyanobacteria.

2020-12-10 | GSE155980 | GEO

Nostoc punctiforme PCC 73102

Project description:Nostoc punctiforme + PKS1 compounds Raw sequence reads

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Nostoc punctiforme PCC 73102

Project description:Nostoc punctiforme PCC 73102 Raw sequence reads

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Nostoc punctiforme PCC 73102

Project description:Nostoc punctiforme PCC 73102 Genome sequencing and assembly

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