GEO DataSets

(Submitter supplied) Investigation of whole genome expression changes in Magnetospririllum magneticum mutants, probing the role of the CtrA regulatory pathway. The mutants are further described in a manuscript submitted for publication at J. Bacteriology. Developmental events across the prokaryotic life cycle are highly regulated at the transcriptional and post-translational levels. Key elements of a few regulatory networks are conserved among phylogenetic groups of bacteria, although the features controlled by these conserved systems are as diverse as the organisms encoding them. more...

Organism:

Paramagnetospirillum magneticum AMB-1

Type:

Expression profiling by array

Platform:

GPL15199

16 Samples

Download data: PAIR

(Submitter supplied) Iron is limiting in the environment, bacteria respond to this deprivation by activating genes required for bacterial iron homeostasis. Transcriptional regulation in response to iron in Gram-negative bacteria is largely mediated by the ferric uptake regulator protein Fur, which in the presence of iron binds to a specific sequence in the promoter regions of genes under its control and acts as a repressor. more...

Organism:

Paramagnetospirillum magneticum AMB-1

Type:

Expression profiling by array

Platform:

GPL3072

4 Samples

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(Submitter supplied) Deatails of the series are available in the publications Suzuki et al., The Journal of Bacteriology “Global gene expression analysis of iron-inducible genes in Magnetospirillum magneticum AMB-1”, accepted for the publication. The gene expression profiles were categorized into 5 patterns. Abstract of the publication: "feo, tpd and ftr which encode ferrous transporters were up-regulated under iron-rich conditions.The concomitant rapid iron uptake and magnetite formation suggest that these uptake systems serve as iron supply lines for magnetosome synthesis." Keywords: iron response

Organism:

Paramagnetospirillum magneticum AMB-1

Type:

Expression profiling by array

Dataset:

GDS2351

Platform:

GPL3072

8 Samples

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Analysis of magnetotactic bacterium strain AMB-1 grown under various initial iron-rich conditions. These bacteria have a high-iron requirement for magnetosome synthesis, several orders of magnitude greater than that for E coli. Results provide insight into specific iron uptake systems in AMB-1.

Organism:

Magnetospirillum magneticum AMB-1

Type:

Expression profiling by array, log2 ratio, 8 dose sets

Platform:

GPL3072

Series:

GSE3914

8 Samples

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(Submitter supplied) Each sequence was determined and synthesized from the 60-mer minimal homology region to other ORF sequences analyzed with BLAST program. The amino-activated oligonucleotides (40 pmol) were printed onto TaKaRa-Hubble Slide Glass coated with active ester (TaKaRa Bio Inc., Japan) using the Affymetrix 417/427 arrayer (Affymetrix, Santa Clara, CA). The microarray slides were stored in light shaded desiccators until use.

Organism:

Paramagnetospirillum magneticum AMB-1

1 DataSet

2 Series

12 Samples

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(Submitter supplied) Custom 4x72,000 gene expression microarray. NimbleGen design name 090515_Mmag_SG_exp, NimbleGen design ID 21722. Each 72k expression design contains duplicate coverage of 4350 annotated genes (60mer probes, 7 unique probes per gene). In addition, design contains 7 60mer probes per 22 unannotated ORFs, genomic coordinates of each are listed in SEQ_ID (denoted as genomic region [LDx] _ gene start of region _ gene end of region _ genomic coordinate start _ genomic coordinate end). more...

Organism:

Paramagnetospirillum magneticum AMB-1

1 Series

16 Samples

Download data: NDF, NGD