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  • Title: Transcript profiles of Nitrosomonas europaea during growth and upon deprivation of ammonia and carbonate.
    Author: Wei X, Yan T, Hommes NG, Liu X, Wu L, McAlvin C, Klotz MG, Sayavedra-Soto LA, Zhou J, Arp DJ.
    Journal: FEMS Microbiol Lett; 2006 Apr; 257(1):76-83. PubMed ID: 16553835.
    Abstract:
    The transcriptome of Nitrosomonas europaea was analyzed with whole-genome microarrays. Growing cells were compared to cells deprived of (NH4)2SO4 and Na2CO3. Hybridization signals were detected for 76% of the genes represented on the array under either or both conditions. Transcript levels for 68% of the genes were at least twofold higher in growing cells than in deprived cells, while only 0.42% of the genes were present at more than twofold higher levels in deprived cells. Transcript levels for the remaining 7% of the genes did not change significantly with the treatments. These trends were confirmed for selected genes by Northern hybridizations and quantitative RT-PCR. Compared to heterotrophic bacteria, N. europaea downregulates a greater proportion of its genes and fewer genes appear to be associated with the adaptation to starvation.
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