None of these genes were homologous to genes implicated in nitrogen metabolism in other systems.
In addition, several other genes, including an ammonium transporter (amtB, SCO5583) and a signal transduction protein PII (glnK, SCO5584) are implicated in nitrogen assimilation [ 30, 31].
Genes implicated in nitrogen metabolism are also among the genes showing significant variation in expression among natural isolates of S. cerevisiae (Carreto et al. 2011).
The A. amazonense species has several genes implicated in nitrogen metabolism, which encode transporters, enzymes and regulatory proteins (Additional file 1).
Subsequent deletion includes the enzymes implicated in nitrogen assimilation, which takes place just after the broad deletion of EAAs biosynthetic enzymes (since except metazoans, other eukaryotic clades lack biosynthetic pathways and contains a nitrogen assimilative enzyme), as observed in more derived metazoans, but not Cnidaria.
GPR-5 and GPR-6 are similar to Stm1p, a PQ-loop family protein originally implicated in nitrogen sensing upstream of the Gα protein Gpa2 in S. pombe (Chung et al. 2001), with more recent evidence suggesting that the S. cerevisiae homolog YPQ1 may function as a vacuolar amino acid transporter (Sekito et al. 2014).
On the other hand, RhbA is implicated on nitrogen-dependent nutrient sensing and acquisition [ 48].
Using nitrogen-limited continuous culture we identified the nitrogen-responsive transcriptome of M. smegmatis, including a number of small non-coding RNAs implicated in controlling nitrogen-regulated gene expression.
This new property may make them highly useful for detecting oxygen as well as toxic exhaust gases like ammonia and nitrogen dioxide, implicated in greenhouse warming and acid rain.
Many of these bacteria might be of high physiological relevance for carp as these groups have been implicated in vitamin production, nitrogen cycling and (cellulose) fermentation.
