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RNAseq analysis of the N. punctiforme transcriptome during hormogonium development

ABSTRACT: Change in gene expression for wild-type Nostoc punctiforme ATCC 29133 over the time course of hormogonium development

ORGANISM(S): Nostoc punctiforme PCC 73102

PROVIDER: GSE94020 | GEO | 2017/01/25

SECONDARY ACCESSION(S): PRJNA363067

REPOSITORIES: GEO

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RNAseq analysis of the N. punctiforme transcriptome during hormogonium development in wild type, and three sigma-factor deletion strains

Project description:Change in gene expression for wild-type Nostoc punctiforme ATCC 29133, or three derivative strains with sigma factors deleted, over the time course of hormogonium development

2019-01-12 | GSE124969 | GEO

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

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

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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

Nostoc punctiforme PCC 73102

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Project description:HILIC runs (separate LC-MS) of mixed proteome from closely related cyanobacterium Nostoc punctiforme ATCC 29133 and Nostoc sp. PCC 7120. Quantitative comparisons across species can only be made using orthologous peptides. All other peptides are used to assess biological variation and MS/MS co-elution study.

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