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Updated: Apr 6, 2026
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Isolation and Identification of Bacterial Strains from Skin of Terrestrial Amphibians
Published on: June 17, 2025
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Kineococcus gypseus sp. nov., isolated from saline sediment
Qinyuan Li1,2, Guiding Li1, Xiu Chen3
1Yunnan Institute of Microbiology, School of Life Sciences, Yunnan University, Kunming, 650091, PR China.
Summary
A novel actinomycete, Kineococcus gypseus sp. nov., was identified from Chinese alkaline sediment. This Gram-positive bacterium is aerobic, motile, and coccus-shaped, distinct from related Kineococcus species.
Area of Science:
- Microbiology
- Bacteriology
- Taxonomy
Background:
- Actinomycetes are a diverse group of Gram-positive bacteria with significant ecological and industrial roles.
- The genus Kineococcus comprises aerobic actinomycetes with unique cellular characteristics.
- Accurate taxonomic classification is crucial for understanding microbial diversity and function.
Purpose of the Study:
- To characterize a novel actinomycete isolate from an alkaline sediment environment.
- To determine the phylogenetic and taxonomic position of the isolate within the genus Kineococcus.
- To propose a new species designation based on polyphasic taxonomic data.
Main Methods:
- Isolation and cultivation of actinomycetes from alkaline sediment.
- Phylogenetic analysis using 16S rRNA gene sequencing.
- Detailed chemotaxonomic analyses including cell wall composition, whole-cell sugars, menaquinone, polar lipids, and fatty acids.
- Genomic DNA G+C content determination.
- DNA–DNA hybridization for relatedness studies.
Main Results:
- A novel Gram-positive, aerobic, motile, coccus-shaped actinomycete, strain YIM 121300T, was isolated.
- Phylogenetic analysis placed strain YIM 121300T within the genus Kineococcus, closely related to Kineococcus aurantiacus.
- Chemotaxonomic data (meso-diaminopimelic acid, specific sugars, MK-9(H2), fatty acids) and DNA–DNA relatedness (55%) distinguished it from known species.
- Genomic DNA G+C content was 75.1 mol%.
Conclusions:
- Strain YIM 121300T represents a novel species within the genus Kineococcus.
- The proposed name for this new species is Kineococcus gypseus sp. nov.
- The type strain is YIM 121300T (=CCTCC AA 2013232T = DSM 27627T).
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