Nitrosomonas supralitoralis sp. nov., an ammonia-oxidizing bacterium from beach sand in a supralittoral zone

Arch Microbiol. 2022 Aug 17;204(9):560. doi: 10.1007/s00203-022-03173-5.


A betaproteobacterial chemolithotrophic ammonia-oxidizing bacterium designated APG5T was isolated from supralittoral sand of the Edmonds City Beach, WA, USA. Growth was observed at 10-35 °C (optimum, 30 °C), pH 5-9 (optimum, pH 8) and ammonia concentrations as high as 100 mM (optimum, 1-30 mM NH4Cl). The strain grows optimally in a freshwater medium but tolerates up to 400 mM NaCl. It is most closely related to 'Nitrosomonas ureae' (96.7% 16S rRNA and 92.4% amoA sequence identity). The 3.75-Mbp of AGP5T draft genome contained a single rRNA operon and all necessary tRNA genes and has the lowest G+C content (43.5%) when compared to the previously reported genomes of reference strains in cluster 6 Nitrosomonas. Based on an average nucleotide identity of 82% with its closest relative ('N. ureae' Nm10T) and the suggested species boundary of 95-96%, a new species Nitrosomonas supralitoralis sp. nov. is proposed. The type strain of Nitrosomonas supralitoralis is APG5T (= NCIMB 14870T = ATCC TSD-116T).

Keywords: AOB; Ammonia-oxidizing bacteria; Beach; Brackish; Nitrosomonas; Sand.

MeSH terms

  • Ammonia*
  • DNA, Bacterial / chemistry
  • DNA, Bacterial / genetics
  • Nitrosomonas / genetics
  • Oxidation-Reduction
  • Phylogeny
  • RNA, Ribosomal, 16S / genetics
  • Sand*
  • Sequence Analysis, DNA


  • DNA, Bacterial
  • RNA, Ribosomal, 16S
  • Sand
  • Ammonia