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New erm Gene in Staphylococcus aureus clinical isolates.
Mayumi Matsuoka1, Matsuhisa Inoue, Yoshinori Nakajima
1Division of Microbiology, Hokkaido College of Pharmacy, Otaru, Hokkaido 047-0264, Japan. matsuoka@hokuyakudai.ac.jp
Antimicrobial Agents and Chemotherapy
|December 26, 2001
Summary
A novel Staphylococcus aureus gene class, erm(Y), was identified. This gene exhibits significant sequence similarity to erm(T), suggesting a shared lineage and potential functional roles in antibiotic resistance.
Area of Science:
- Microbiology
- Molecular Biology
- Genetics
Background:
- Staphylococcus aureus is a significant human pathogen.
- Antibiotic resistance in S. aureus poses a major public health threat.
- Understanding novel resistance mechanisms is crucial for developing new treatments.
Purpose of the Study:
- To identify and characterize novel antibiotic resistance genes in Staphylococcus aureus.
- To investigate the genetic context and relatedness of newly identified resistance genes.
Main Methods:
- Plasmid isolation and sequencing from a clinical isolate of Staphylococcus aureus.
- Sequence analysis and comparison of the novel erm(Y) gene with known erm genes.
- Bioinformatic analysis of nucleotide and deduced amino acid sequences.
Main Results:
- Identification of a novel gene class, erm(Y), in S. aureus.
- The erm(Y) gene was found on a plasmid alongside msr(A) and mph(C) genes.
- erm(Y) showed 81% nucleotide and 76% amino acid identity to erm(T).
Conclusions:
- erm(Y) represents a new class of macrolide resistance genes.
- The genetic linkage with msr(A) and mph(C) suggests co-selection or co-regulation.
- The high sequence similarity to erm(T) implies a common evolutionary origin.