A yellow, Gram-stain-negative, aerobic, non-spore-forming, motile, and rod-shaped bacterial strain designated M6
T was isolated from fully weathered granitic soil. The strain showing the highest 16S rRNA gene sequence similarity to M6
T was
Sandaracinobacteroides hominis SZY PN-1
T (96.3%), the only species
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A yellow, Gram-stain-negative, aerobic, non-spore-forming, motile, and rod-shaped bacterial strain designated M6
T was isolated from fully weathered granitic soil. The strain showing the highest 16S rRNA gene sequence similarity to M6
T was
Sandaracinobacteroides hominis SZY PN-1
T (96.3%), the only species in the genus
Sandaracinobacteroides. The average nucleotide identity and digital DNA-DNA hybridization value between these two strains were 72.6% and 18.0% respectively. Growth was inhibited by NaCl (≥0.1% (
w/v)). Strain M6
T contained C
18:1ω7c (33.8%), C
14:0 2-OH (16.6%), summed feature 3 (15.8%), and C
16:0 (12.6%) as the major fatty acids. The polar lipids profile consisted of phosphatidylglycerol, phosphatidylethanolamine, an unidentified glycolipid, four unidentified phospholipids, and four unidentified lipids. The genome of strain M6
T was 3.4 Mb with 67.7% GC content. Further genomic analysis revealed a biosynthetic gene cluster for zeaxanthin, the production of which was verified by a high-resolution mass spectrum. The existence of multiple genes for aromatic ring-hydroxylating dioxygenases implies the potential ability for organic pollution controlling. The morphological, physiological, chemotaxonomic, and phylogenetic analysis clearly distinguished this strain from its phylogenetic neighbors, thus strain M6
T represents a novel species of the genus
Sandaracinobacteroides, for which the name
Sandaracinobacteroides saxicola sp. nov. is proposed. The type of strain is M6
T (=CGMCC 1.19164
T=NBRC 115420
T).
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