Abstract
A novel Gram-negative and red-pinkish bacterium designated
DG5BT was isolated from a dry soil. Cells were rods that were
catalase- and oxidase-positive, and non-motile. The strain was
found to grow at temperatures from 10 to 30°C (optimum
25°C) and pH 6.0–8.0, (optimum pH 7) on R2A broth. 16S
rRNA gene sequence (1,452 bp) analysis of this strain identified
it as a member of the genus Hymenobacter that belongs
to the class Cytophagia. The highest gene sequence similarities
were with Hymenobacter arizonensis OR362-8T (98.3%),
Hymenobacter humi DG31AT (97.6%), and Hymenobacter
glaciei VUG-A130T (96.6%). Strain DG5BT exhibited <70%
DNA-DNA relatedness with H. arizonensis (34.7 ± 7.0%; reciprocally,
29.7 ± 1.2%) and H. humi (39.4 ± 4.3%; reciprocally,
39.5 ± 3.3%) as a different genomic species, and its
genomic DNA G+C content was 59.8%. Strain DG5BT had the
following chemotaxonomic characteristics: the major fatty
acids are iso-C15:0, anteiso-C15:0, C16:1 ω5c, and summed feature
3 (C16:1 ω7c / C16:1 ω6c); polar lipid profile contained phosphatidylethanolamine
(PE), unknown aminophospholipid
(APL), unknown glycolipids (GL), unknown phospholipids
(PL), and unknown polar lipids (L); the major quinone is MK-
7. The absorbance peak of pigment is at 481.0 nm. Strain
DG5BT showed low-level resistance to gamma-ray irradiation.
Phenotypic, chemotaxonomic, and genotypic properties
indicated that isolate DG5BT represents a novel species
within the genus Hymenobacter for which the name Hymenobacter
sedentarius sp. nov. is proposed. The type strain is
DG5BT (=KCTC 32524T =JCM 19636T).
Citations
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