Calditerricola satsumensis gen. nov., sp. nov. and Calditerricola yamamurae sp. nov., extreme thermophiles isolated from a high-temperature compost.
Two novel thermophilic micro-organisms, designated YMO81(T) and YMO722(T), were isolated from a high-temperature compost (internal temperature > 95 °C). The isolates were able to grow at 80 °C in a nutrient broth and in a synthetic medium. Cells were aerobic, Gram-negative rods (0.3 x 4.0 μm). Spore formation was not observed. Strain YMO81(T) grew at 83 °C and pH 6.9-8.9 and grew optimally at 78 °C and pH 7.5 with 2  % NaCl. For growth in a synthetic minimal medium at 70 °C, the vitamins biotin, folic acid and thiamine and the amino acids glutamine and methionine were essential for growth of both strains; at 80 °C, strain YMO81(T) also required histidine, isoleucine, leucine, lysine, phenylalanine, serine, tryptophan and valine. Cellular fatty acids of the isolates comprised mainly iso-C₁₇:₀ and anteiso-C₁₇:₀. The DNA G+C contents of strains YMO81(T) and YMO722(T) were 70 and 64 mol%, respectively. When the 16S rRNA gene sequences of the isolates were compared with those of other bacteria, highest similarity was observed with Planifilum yunnanense LA5(T) (90 % 16S rRNA gene sequence similarity). DNA-DNA relatedness between strain YMO722(T) and strain YMO81(T) was 55  %. N⁴-Aminopropylspermine was identified as a major polyamine, which suggested that the isolates were distinct from other related taxa. On the basis of phylogenetic, phenotypic and chemotaxonomic analyses, we propose a new genus, Calditerricola gen. nov., and two novel species, the type species Calditerricola satsumensis sp. nov., with type strain YMO81(T) (=ATCC BAA-1462(T) =JCM 14719(T) =DSM 45223(T)), and Calditerricola yamamurae sp. nov., with type strain YMO722(T) (=ATCC BAA-1461(T) =JCM 14720(T) =DSM 45224(T)).
Moriya
Toshiyuki
T
Institute of Environmental Microbiology, Kyowa Kako Co., 2-15-5 Tadao, Machida, Tokyo 194-0035, Japan.|School of Life Science, Tokyo University of Pharmacy and Life Science, 1432 Horinouchi, Hachiouji, Tokyo 193-0392, Japan.
Hikota
Tomohisa
T
School of Life Science, Tokyo University of Pharmacy and Life Science, 1432 Horinouchi, Hachiouji, Tokyo 193-0392, Japan.
Yumoto
Isao
I
National Institute of Advanced Industrial Science and Technology, Research Institute of Genome-based Biofactory, 2-17-2-1 Tsukisamu-Higashi, Toyohira-ku, Sapporo 062-8517, Japan.
Ito
Takashi
T
RIKEN, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan.
Terui
Yusuke
Y
Chiba Institute of Science, 15-8 Shiomi-cho, Choshi, Chiba 288-0025, Japan.
Yamagishi
Akihiko
A
School of Life Science, Tokyo University of Pharmacy and Life Science, 1432 Horinouchi, Hachiouji, Tokyo 193-0392, Japan.
Oshima
Tairo
T
Institute of Environmental Microbiology, Kyowa Kako Co., 2-15-5 Tadao, Machida, Tokyo 194-0035, Japan.|School of Life Science, Tokyo University of Pharmacy and Life Science, 1432 Horinouchi, Hachiouji, Tokyo 193-0392, Japan.
D001406:Bacillaceae / Q000145:classification* / Q000235:genetics / Q000302:isolation & purification* / Q000502:physiology; D001482:Base Composition; D016000:Cluster Analysis; D003470:Culture Media / Q000737:chemistry; D004269:DNA, Bacterial / Q000737:chemistry / Q000235:genetics; D004275:DNA, Ribosomal / Q000737:chemistry / Q000235:genetics; D005227:Fatty Acids / Q000032:analysis; D006358:Hot Temperature; D008969:Molecular Sequence Data; D009693:Nucleic Acid Hybridization; D010802:Phylogeny; D011073:Polyamines / Q000032:analysis; D012336:RNA, Ribosomal, 16S / Q000235:genetics; D017422:Sequence Analysis, DNA; D012987:Soil; D012988:Soil Microbiology
D003470:Culture Media; D004269:DNA, Bacterial; D004275:DNA, Ribosomal; D005227:Fatty Acids; D011073:Polyamines; D012336:RNA, Ribosomal, 16S; D012987:Soil