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69 results for “sigma factor”
Data from: Insights into the origin and evolution of plant sigma factors
Plant sigma factors (SIGs) are key regulators of chloroplast gene expression and chloroplast differentiation. Despite their functional importance, the evolutionary history of these factors remains unclear. Using newly available genomic and transcriptomic data, we conducted a detailed and comprehensive phylogenetic analysis of SIG homologues from land plants and algae. Our results reveal that plants have acquired sigma factors from ancestor cyanobacteria via endosymbiotic gene transfers, forming four major clades, namely, super-SIG2 (SIG2/3/4/6/SIG2-like), SIG1, SIG5 and SIGX. The super-SIG2 clade was confirmed to have evolved from cyanobacterial SIGA factors, and a novel clade (SIGX) specific to non-angiosperms was revealed here. Gene duplications (mainly whole genome duplications) within lineages and species have contributed to the expansion of sigma factors in plants, especially flowering plants. We hypothesize that plant sigma factors originated from different endosymbiotic ancestors and evolved diverse functions. This not only sheds new light on the evolution of plant SIG genes but also paves the way for understanding the functional diversification of these genes.
Data from: Insights into the origin and evolution of plant sigma factors
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Role of an extracytoplasmic function sigma factor, PGN_0319, in hemin utilization by Porphyromonas gingivalis
GEO Series GSE78048. Porphyromonas gingivalis ATCC 33277; Porphyromonas gingivalis. 4 samples. Type: Expression profiling by array.
Streptomyces griseus transcriptome analysis in delta sigD, encoding an ECF-sigma factor
GEO Series GSE27426. Streptomyces griseus. 1 samples. Type: Expression profiling by array.
Role of the extracytoplasmic-function sigma Factor sigmaH in Mycobacterium tuberculosis global gene expression
GEO Series GSE8689. Mycobacterium tuberculosis. 15 samples. Type: Expression profiling by array.
Translational activation by an alternative sigma factor in Bacillus subtilis
GEO Series GSE168393. Bacillus subtilis subsp. subtilis str. 168. 4 samples. Type: Other.
Promoter-independent gene activation by Sigma factor-associated Cas12f proteins
GEO Series GSE293889. Escherichia coli; Flagellimonas taeanensis. 129 samples. Type: Genome binding/occupancy profiling by high throughput sequencing; Other; Expression profiling by high throughput sequencing.
Phage-encoded sigma factors alter bacterial dormancy
GEO Series GSE187004. Bacillus subtilis. 42 samples. Type: Expression profiling by high throughput sequencing.
Gene expression changes in group 2 sigma factor mutant, ΔsigCDE, in standard growth conditions and after high-light treatment
GEO Series GSE50060. Synechocystis sp. PCC 6803. 13 samples. Type: Expression profiling by array.
Identification of an ECF sigma factor that facilitates electroactive biofilm formation by Shewanella oneidensis MR-1
GEO Series GSE142643. Shewanella oneidensis; Shewanella oneidensis MR-1. 16 samples. Type: Expression profiling by array.
ChIP-seq study of sigma factors in Pseudomonas aeruginosa
GEO Series GSE54997. Pseudomonas aeruginosa. 34 samples. Type: Genome binding/occupancy profiling by high throughput sequencing.
Genome-scale reconstruction of the sigma factor network in E. coli
GEO Series GSE46737. Escherichia coli str. K-12 substr. MG1655. 6 samples. Type: Expression profiling by high throughput sequencing.
Response of ECF sigma factor deletion mutants of Cupriavidus metallidurans to mixed metal ions (Co, Cu, Cd, Zn, Ni, 30 µM each)
GEO Series GSE115771. Cupriavidus metallidurans; Cupriavidus metallidurans CH34. 16 samples. Type: Expression profiling by array.
Sigma factor WhiGch positively regulates natamycin production in Streptomyces chattanoogensis L10
GEO Series GSE58995. Streptomyces chattanoogensis. 6 samples. Type: Expression profiling by array.
Identification of an ECF sigma factor that facilitates electroactive biofilm formation by Shewanella oneidensis MR-1: Experiment 2
GEO Series GSE142642. Shewanella oneidensis; Shewanella oneidensis MR-1. 8 samples. Type: Expression profiling by array.
Group 2 Sigma Factors Are Central Regulators of Oxidative Stress Acclimation in Cyanobacteria
GEO Series GSE117478. Synechocystis sp. PCC 6803. 19 samples. Type: Expression profiling by array.
SCO4117 ECF sigma factor pleiotropically controls secondary metabolism and morphogenesis in Streptomyces coelicolor
GEO Series GSE107661. Streptomyces coelicolor. 4 samples. Type: Expression profiling by high throughput sequencing.
Identification of the alternative sigma factor SigX regulon and its implications for Pseudomonas aeruginosa pathogenicity
GEO Series GSE50937. Pseudomonas aeruginosa UCBPP-PA14. 12 samples. Type: Expression profiling by high throughput sequencing; Genome binding/occupancy profiling by high throughput sequencing.
Global transcriptional control by the alternative sigma factor SigB in Clostridium difficile
GEO Series GSE85981. Clostridioides difficile. 4 samples. Type: Expression profiling by array.
Analysis of sigma factor-dependent gene expression in Pseudomonas aeruginosa by RNA sequencing
GEO Series GSE54998. Pseudomonas aeruginosa. 70 samples. Type: Expression profiling by high throughput sequencing.
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Allen Brain Atlas
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DANDI Archive for NWB datasets
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International Brain Laboratory public data
The International Brain Laboratory public data releases expose standardized mouse decision-making experiments, including Neuropixels recordings, widefield calcium imaging, behavior, and session metadata accessed through the ONE API.
OpenNeuro
OpenNeuro is a free, open platform for sharing neuroimaging datasets, with public search, dataset pages, and download paths for web, S3, DataLad, and the OpenNeuro CLI.