RRC ID 27634
Author Yamauchi Y, Minegishi H, Echigo A, Shimane Y, Kamekura M, Itoh T, Ohkuma M, Doukyu N, Inoue A, Usami R.
Title Halarchaeum rubridurum sp. nov., a moderately acidophilic haloarchaeon isolated from commercial sea salt samples.
Journal Int. J. Syst. Evol. Microbiol.
Abstract Six halo-acidophilic archaeal strains were isolated from four commercial salt samples obtained from seawater in the Philippines, Indonesia (Bali) and Japan (Okinawa) on agar plates at pH 4.5. Cells of the six strains were pleomorphic, and stained Gram-negative. Two strains were pink-red pigmented, while four other strains were orange-pink pigmented. Strain MH1-16-3(T) was able to grow at 9-30% (w/v) NaCl [with optimum at 18% (w/v) NaCl], at pH 4.5-6.8 (optimum, pH 5.5) and at 20-50 °C (optimum, 42 °C). The five other strains grew at slightly different ranges. The six strains required at least 1 mM Mg(2+) for growth. The 16S rRNA gene sequences of the six strains were almost identical, sharing 99.9 (1-2 nt differences) to 100% similarity. The closest relatives were Halarchaeum acidiphilum MH1-52-1(T) and Halarchaeum salinum MH1-34-1(T) with 97.7% similarity. The DNA G+C contents of the six strains were 63.2-63.7 mol%. Levels of DNA-DNA relatedness amongst the six strains were 79-86%, while those between MH1-16-3(T) and H. acidiphilum MH1-52-1(T) and H. salinum MH1-34-1(T) were both 43 and 45% (reciprocally), respectively. Based on the phenotypic, genotypic and phylogenetic analyses, it is proposed that the six isolates represent a novel species of the genus Halarchaeum, for which the name Halarchaeum rubridurum sp. nov. is proposed. The type strain is MH1-16-3(T) ( =JCM 16108(T) =CECT 7535(T)).
Volume 63(Pt 9)
Pages 3143-7
Published 2013-9
DOI 10.1099/ijs.0.049262-0
PII ijs.0.049262-0
PMID 23435243
MeSH Base Composition DNA, Archaeal / genetics Halobacteriaceae / classification* Halobacteriaceae / genetics Halobacteriaceae / isolation & purification Indonesia Japan Lipids / analysis Molecular Sequence Data Nucleic Acid Hybridization Philippines Phylogeny* RNA, Ribosomal, 16S / genetics Seawater / microbiology* Sequence Analysis, DNA Sodium Chloride
IF 1.932
Times Cited 6
General Microbes JCM 16108