Abstract
A novel aerobic, Gram-negative, non-pigmented bacterium, GCM72T, was isolated from the alkaline, low-saline ikaite columns in the Ikka Fjord, SW Greenland. Strain GCM72T is a motile, non-pigmented, amylase- and protease-producing, oxidase-positive, and catalase-negative bacterium, showing optimal growth Lit pH 9.2-10.0, at 15 degrees C, and at 3% (w/v) NaCl. Major fatty acids were C12:0 3-OH (12.2 ± 0.1%), C16:00 (18.0 ± 0.1%), C18:1 ω7c (10.7 ± 0.5%), and summed feature 3 comprising C16:1ω7c and/or iso-C15:0 2-OH (36.3 ± 0.7%). Phylogenetic analysis based on 16S rRNA gene sequences showed that isolate GCM72T was most closely related to Rheinheimera baltica and Alishewanella fetalis of the γ-Proteobacteria with a 93% sequence similarity to both. The G + C content of DNA isolated from GCM72T was 49.9 mol% and DNA-DNA hybridization between GCM72T and R. baltica was 9.5%. Fatty acid analysis and G + C content supports a relationship primarily to R. baltica, but several different features, such as a negative catalase-response and optimal growth at low temperature and high pH, together with the large phylogenetic distance and low DNA similarity to its closest relatives, lead us to propose a new genus, Arsukibacterium, gen. nov., with the new species Arsukibacterium ikkense sp. nov. (type strain is GCM72T).
Original language | English |
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Journal | Systematic and Applied Microbiology |
Volume | 30 |
Issue number | 3 |
Pages (from-to) | 197-201 |
Number of pages | 5 |
ISSN | 0723-2020 |
DOIs | |
Publication status | Published - 2007 |
Externally published | Yes |
Keywords
- Applied Microbiology and Biotechnology
- Proteobacteria
- Alkaliphilic
- Arsukibacterium ikkense
- Enzyme producing
- Ikaite columns
- Psychrotolerant
- Amylase
- Bacterial DNA
- Catalase
- Fatty acid
- Oxidoreductase
- Proteinase
- Sodium chloride
- Alishewanella fetalis
- Alkalinity
- Bacterial growth
- bacterium isolation
- Cold
- Controlled study
- DNA DNA hybridization
- DNA isolation
- Enzyme synthesis
- Fatty acid analysis
- Gammaproteobacteria
- Gene sequence
- Genus
- Greenland
- Microbial activity
- Nonhuman
- Nucleotide sequence
- Phylogeny
- Priority journal
- Rheinheimera baltica
- Sequence homology
- Strain difference
- Temperature
- Aerobiosis
- DNA, Bacterial
- DNA, Ribosomal
- Hydrogen-Ion Concentration
- Molecular Sequence Data
- RNA, Ribosomal, 16S
- Seawater
- Bacteria (microorganisms)
- Negibacteria
- Cold Temperature
- γ-Proteobacteria
- Biotechnology
- Microbiology
- BIOFILM FORMATION
- Escherichia-coli
- Ikaite tufa
- Water
- Sea
- Gamma-Proteobacteria
- Greenland Nearctic region
- DNA-DNA hybridization
- optimal growth
- Phylogenetic distance
- Microorganisms (Bacteria, Eubacteria, Microorganisms) - Bacteria [05000*] Arsukibacterium ikkense common new species strain-GCM72 Rheinheimera baltica species Alishewanella fetalis species Arsukibacterium genus new genus
- 16S rRNA 16S ribosomal RNA
- Amylase 9000-92-4
- Catalase 9001-05-2
- DNA
- Oxidase 9035-73-8
- Protease 9001-92-7
- sodium chloride 7647-14-5
- 00504, General biology - Taxonomy, nomenclature and terminology
- 03502, Genetics - General
- 07502, Ecology: environmental biology - General and methods
- 10062, Biochemistry studies - Nucleic acids, purines and pyrimidines
- 10066, Biochemistry studies - Lipids
- 10802, Enzymes - General and comparative studies: coenzymes
- 30000, Bacteriology, general and systematic
- 31000, Physiology and biochemistry of bacteria
- 31500, Genetics of bacteria and viruses
- Biochemistry and Molecular Biophysics
- Population Studies
- Biogeography
- Enzymology
- Molecular Genetics
- Systematics and Taxonomy