In a TARA metagenomes reconstruction exercise,
Delmont et al., Nature Microbio 2018 report the discovery of nitrogen fixing in Planctomycetes. This is the first report of such diazotrophes in this exciting phylum.
In addition, they report that the proportion of genes of unknown function was 27.6% (±2.63%) for the proteobacterial HBDs and 49.3% (±0.5%) as compared to for the 27.6% (±2.63%) for the proteobacterial, highlight the fact that we still poorly understand the functioning of these bacteria.
Also, the set of nitrogen fixation genes were very divergent, suggesting that they were not the result of a lateral gene transfer from more classical diazotrphes.
Looking forward to more discovery in this field.
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