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Identification of Rare Bacterial Pathogens by 16S rRNA Gene Sequencing and MALDI-TOF MS
Published on: July 11, 2016
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Chryseobacterium subflavum sp. nov., isolated from soil
Delong Kong1, Yan Wang1,2, Qingqing Li2
1College of Resources and Environment, Tibet Agricultural and Animal Husbandry University, Linzhi 860000, PR China.
Summary
A novel bacterium, Chryseobacterium subflavum LAMRS1T, was discovered in Chinese soil. This research details its unique characteristics and genetic makeup, expanding the Chryseobacterium genus.
Area of Science:
- Microbiology
- Bacteriology
- Genomics
Background:
- The genus *Chryseobacterium* comprises various Gram-negative bacteria with diverse ecological roles.
- Accurate taxonomic classification is crucial for understanding bacterial diversity and function.
Purpose of the Study:
- To characterize a novel bacterial isolate from a soil sample.
- To determine the taxonomic placement of the isolate within the *Chryseobacterium* genus.
Main Methods:
- Isolation and cultivation of bacteria from soil.
- 16S rRNA gene sequence analysis for phylogenetic placement.
- Genomic analysis including average nucleotide identity (ANI) and digital DNA-DNA hybridization (dDDH).
- Analysis of major isoprenoid quinones and cellular fatty acids.
- Determination of polar lipid profiles.
Main Results:
- A novel Gram-negative, aerobic, non-motile rod, strain LAMRS1T, was isolated.
- Phylogenetic analysis showed close relatedness to *Chryseanthemum* species, with highest 16S rRNA gene sequence similarity to *Chryseanthemum soli* (97.9%).
- ANI and dDDH values were below species delineation thresholds, supporting novelty.
- The draft genome size was 4.61 Mb with a DNA G+C content of 36.2%.
- Distinctive cellular fatty acid and polar lipid profiles were identified.
Conclusions:
- Strain LAMRS1T represents a novel species within the genus *Chryseobacterium*.
- The proposed name for this new species is *Chryseobacterium subflavum* sp. nov.
- The type strain is LAMRS1T (=JCM 33868T=KCTC 72823T).
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