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Published on: November 23, 2012
Complete genome sequence of Sphingomonas sp. gentR, a high-level gentamicin-resistant bacterium
Yi Liu1, Lijing Jiang1, Jinhua Zhang1
1Jiangxi Provincial Key Laboratory for Animal Health, College of Animal Science and Technology, Jiangxi Agricultural University, Nanchang, 330045, Jiangxi, China.
We sequenced the genome of Sphingomonas sp. gentR, a strain highly resistant to the antibiotic gentamicin. This reveals key genes and genomic islands responsible for this resistance, offering insights into bacterial adaptation.
Area of Science:
- Microbiology
- Genomics
- Molecular Biology
Background:
- Sphingomonas species are known for their metabolic versatility and environmental adaptability.
- High-level resistance to antibiotics like gentamicin poses a significant challenge in clinical and environmental settings.
- Understanding the genetic underpinnings of antibiotic resistance in bacteria is crucial for developing effective countermeasures.
Purpose of the Study:
- To present the complete genome sequence of Sphingomonas sp. gentR, a strain exhibiting high-level gentamicin resistance.
- To identify genes and genomic features contributing to antibiotic resistance and adaptation in this strain.
- To provide a valuable genomic resource for research on antibiotic resistance, horizontal gene transfer, and bioremediation.
Main Methods:
- Hybrid genome sequencing using Illumina and Nanopore technologies.
- Bioinformatic assembly and gap-free genome sequence generation.
- Comprehensive functional annotation of predicted coding sequences.
Main Results:
- A complete 4.0 Mbp genome sequence comprising one chromosome and two plasmids.
- Identification of 3,692 coding sequences, including genes for antibiotic resistance, stress adaptation, and metabolic diversity.
- Co-localization of three aminoglycoside resistance genes (ANT(2″)-Ia, ANT(3″)-IIa) and Sul1 within a genomic island on plasmid B.
Conclusions:
- The genome sequence provides insight into the genetic basis of high-level aminoglycoside resistance in Sphingomonas.
- This genomic data is a valuable resource for studying horizontal gene transfer and environmental adaptation.
- The findings support the potential of Sphingomonas for bioremediation applications.
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