Halocatena

Abstract

Abstract Ha.lo.ca.te'na. Gr. masc. n. hals , halos salt; L. fem. n. catena , chain; N.L. fem. n. Halocatena , a salty chain. Euryarchaeota / Halobacteria / Halobacteriales / Halobacteriaceae / Halocatena The archaeal genus Halocatena ( Hct .), belonging to the family Halobacteriaceae within the class Halobacteria, comprises only a single species that is extremely halophilic. The 16S rRNA gene and whole genome‐based phylogenetics revealed robust but distant relatedness with members of the genus Halomarina ( Hmr ). Cells are aerobic, Gram‐stain‐negative, pleomorphic in shape and size, have the ability to grow in absence of Mg 2+ ions, and remain intact in distilled water, unlike the majority of the family Halobacteriaceae . Acid production from most of the sugars is negative. Diethyl derivatives of phosphatidylglycerol (C20, C20, and C25, C20), phosphatidylglycerol phosphate methyl ester (C25, C20), sulfated glycosyl‐mannosyl‐glucosyl diether, two glycosyl‐mannosyl‐glucosyl diether lipids, and a glycolipid are the major polar lipid constituents. DNA G + C content (mol%) : 57.1 (genomic). Type species : Halocatena pleomorpha Verma et al. 2020 VP .