Candidatus Nanosalinicola

Abstract

Abstract Na.no.sa.li.ni'co.la. Gr. masc. n. nanos dwarf; L. fem. pl. n. salinae saltworks; L. suff. –cola (from L. masc. or fem. n. incola ) inhabitant, dweller; N.L. masc. n. Nanosalinicola a dwarf‐sized organism inhabiting saltworks. Nanohaloarchaeota / “Incertae sedis” / “Incertae sedis” / “Incertae sedis” / Candidatus Nanosalinicola The genus Candidatus Nanosalinicola corrig., originally described as Candidatus Nanosalinarum, was established based on a sequence from a metagenome recovered from the hypersaline Lake Tyrrell in Victoria, Australia. Ca . Nanosalinicola is phylogenetically affiliated with members of the Candidatus Nanohaloarchaeota branch ( Candidatus Nanosalina, Candidatus Nanopetraeus corrig., and Candidatus Haloredivivus) of the archaeal DPANN superphylum. On the basis of fluorescence in situ hybridization, cells are ∼0.6 μm in diameter. Analysis of the ∼1.22 Mb genome of Ca . Nanosalinicola J07AB56 with 56% DNA G + C suggests that the organism is an aerobic photoheterotroph. The high proportion of acidic amino acids of the predicted proteins suggests a “salt‐in” strategy for osmotic balance. Gene sequences affiliated with Ca . Nanosalinicola have also been recovered from coastal salterns in Australia and California, USA. DNA G + C content (mol%) : 56 (genome sequence). Type species : Not assigned. Genome sequence : AEIX00000000.