Candidatus Nanosalina

Abstract

Abstract Na.no.sa.li'na. Gr. masc. n. nanos dwarf; N.L. masc. adj. salinus salty; N.L. fem. n. Nanosalina a dwarf‐size salty organism. Nanohaloarchaeota / “Incertae sedis” / “Incertae sedis” / “Incertae sedis” / Candidatus Nanosalina The genus Candidatus Nanosalina was established based on a sequence from a metagenome recovered from the hypersaline Lake Tyrrell in Victoria, Australia. Ca . Nanosalina is phylogenetically affiliated with members of the Candidatus Nanohaloarchaeota branch ( Candidatus Nanosalinicola corrig., 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 ∼1.23 Mb genome of Ca . Nanosalina J07AB43 with 43.5% DNA G + C suggests that the organism possesses an aerobic, photoheterotrophic lifestyle. The high proportion of acidic amino acids of the predicted proteins suggests a “salt‐in” strategy for osmotic balance. Gene sequences affiliated with Ca . Nanosalina have been recovered from coastal salterns in Australia and California, USA. DNA G + C content (mol%) : 43.5 (genome sequence). Type species : Not assigned.