Halomicrococcus

Abstract

Ha.lo.mi.cro.coc'cus. Gr. masc. n. hals , halos, salt; Gr. masc. adj. mikros, small; N.L. masc. n. coccus , (from Gr. masc. n. kokkos, grain, seed) coccus; N.L. masc. n. Halomicrococcus, halophilic small coccus. Euryarchaeota / Halobacteria / Halobacteriales / Halobacteriaceae / Halomicrococcus The genus Halomicrococcus accommodates halophilic, neutrophilic, and chemoheterotrophic archaea that can use acetate as their sole carbon and energy source. Cells are Gram‐stain‐negative, facultatively anaerobic, and nonmotile. Halomicrococcus species are capable of feeding on d ‐glucose, starch, d ‐mannose, l ‐sorbose, maltose, and lactose. They are also capable of thriving on glycerol, mannitol, sorbitol, and some amino acids including l ‐arginine, l ‐glutamate, l ‐ornithine, and some other multicarbon compounds, but citrate is not utilized. They are able to reduce nitrate to nitrite under anaerobic conditions. Mg 2+ is essential for growth. The major polar lipids are phosphatidylglycerol, phosphatidylglycerol phosphate methyl ester, and sulfated mannosyl‐glucosyl‐glycerol diether‐1. The sole isolate characterized was obtained from a salt mine. DNA G + C content (mol%) : 62.9 ( Genome ). Type species : Halomicrococcus hydrotolerans Chen et al. 2020 VP .