Danxiaibacter flavus gen. nov., sp. nov., a novel bacterium of the family Chitinophagaceae isolated from forest soil on Danxia Mountain

A Gram-stain-negative, aerobic, short rod-shaped, yellow bacterium, designated SYSU DXS3180 T , was isolated from forest soil of Danxia Mountain in PR China. Growth occurred at 15–37 °C (optimum, 28–30 °C), pH 6.0–10.0 (optimum, pH 7.0–8.0) and with 0–2.0 % NaCl (optimum, 0–0.5 %, w/v). Strain SYSU DXS3180 T was positive for hydrolysis of Tween 20, Tween 60, Tween 80 and starch, but negative for urease, H 2 S production, nitrate reduction, Tween 40 and gelatin. Phylogenetic analysis based on 16S rRNA gene and genome sequences showed that SYSU DXS3180 T belonged to the family Chitinophagaceae . The closely related members were Foetidibacter luteolus YG09 T (94.2 %), Limnovirga soli KCS-6 T (93.9 %) and Filimonas endophytica SR 2-06 T (93.7 %). The genome of strain SYSU DXS3180 T was 7287640 bp with 5782 protein-coding genes, and the genomic DNA G+C content was 41.4 mol%. The main respiratory quinone was MK-7 and the major fatty acids (>10 %) were iso-C 15 : 0 , iso-C 17 : 0 3-OH and iso-C 15 : 1 G. The major polar lipids consisted of phosphatidylethanolamine, two unidentified aminolipids and two unidentified polar lipids. Based on the phylogenetic, phenotypic and chemotaxonomic characteristics, strain SYSU DXS3180 T is proposed to represent a novel species of a novel genus named Danxiaibacter flavus gen. nov., sp. nov., within the family Chitinophagaceae . The type strain is SYSU DXS3180 T (=KCTC 92895 T =GDMCC 1.3825 T ).