Project description:Investigation of whole genome gene expression level changes in a Nitrosomonas europaea (ATCC 19718) wildtype and pFur::Kan mutant [kanamycin resistance cassette insertion in the promoter region of the fur gene (NE0616)] strains grown in Fe-replete and Fe-limited media. The Nitrosomonas europaea (ATCC 19718) wiltype cells grown in Fe-limited media were compared to cells grown in Fe-replete media to gain a better understanding of the metabolic changes occurring in response to iron stress. The Nitrosomonas europaea (ATCC 19718) pFur::Kan mutant strain grown in Fe-replete & Fe-limited media were compared to wildtype cells grown in Fe=replete & Fe-limited media to gain a better understanding of the role Fur (NE0616) plays in iron homeostasis control. A 4-plex 3 chip study using total RNA recovered from three separate wild-type cultures each of N. europaea grown in Fe-replete media and Fe-limited media and three seperate cultures each of N. europaea pFur::Kan mutant strain grown in Fe-replete and Fe-limited media. Each chip measures the expression level of 2368 genes from Nitrosomonas europaea (ATCC19718) with 4 X 72,000 60-mer 14 probe pairs per gene, with two-fold technical redundancy.

2010-06-20 | E-GEOD-18709 | biostudies-arrayexpress

Nitrospira nitrosa

Project description:Nitrospira nitrosa Raw sequence reads

| PRJNA1173316 | ENA

Global Transcriptional Response of Nitrosomonas europaea to Cyanide

Project description:Pure cultures of ammonia oxidizing bacterium, Nitrosomonas europaea, are exposed to cyanide in pseudo-steady state batch reactor in presence of ammonia. Nitrosomonas europaea are generally regarded as the most sensitive organism to various inhibitors commonly encountered in the wastewater treatment plants (WWTP). To find stress genes of Nitrosomonas europaea to cyanide known as inhibitor of respiratory process, whole-genome transcript response to cyanide was determined in this research using microarray and qRT-PCR. When 1 uM NaCN inhibits nitrification about 50 %, transcript levels of 35 genes were increased while transcript levels of 29 genes were decreased, showing more than 2-fold in total 2460 genes. moeZ (NE2353), homologue with rhodanases related to detoxification of CN-, showed 7-fold up regulation and gene cluster including moeZ also showed significant up regulation. Keywords: cyanide, stress response, moeZ

2008-06-21 | GSE10664 | GEO

Comparative proteomics of three species of ammonia-oxidizing bacteria under ammonia starved and ammonia replete conditions

Project description:In this experiment, we used advanced proteomics techniques to discern differences in energy allocation between three strains of ammonia oxidizing bacteria: Nitrosomonas europaea, Nitrosomonas ureae, and Nitrosospira multiformis, during ammonia starved and ammonia replete conditions. Replicate cultures in late log phase from the three strains were starved of ammonia for 24 hours and compared to replicate control cultures grown for the same period. All three species were grown with three biological replicates for each condition and species with the exception of two replicates from the N. ureae starved cultures due to sample processing loss. This study has, to our knowledge, produced the first complete proteomes of Nitrosospira multiformis and Nitrosomonas ureae.

2018-05-16 | PXD008954 | Pride

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