A potent seryl tRNA synthetase inhibitor SB-217452 isolated from a Streptomyces species
- PMID: 11217799
- DOI: 10.7164/antibiotics.53.1346
A potent seryl tRNA synthetase inhibitor SB-217452 isolated from a Streptomyces species
Abstract
A potent inhibitor of seryl tRNA synthetase, designated SB-217452 has been isolated from Streptomyces sp. ATCC 700974. The fermentation, isolation, structure elucidation and some properties are described. SB-217452 showed inhibitory activity against both Staphylococcus aureus and rat seryl tRNA synthetases, with similar IC50 values of approximately 8 nM. The inhibitor is the serine linked nucleoside moiety of the antibiotic albomycin delta2. In contrast to albomycin delta2, SB-217452 showed only very weak antibacterial activity against a limited range of microorganisms. The compound has not been previously reported as a naturally occurring metabolite. In addition to SB-217452, albomycin delta2 Fe3+ complex and the novel Al3+ complex were isolated from the fermentation. These complexes had no seryl tRNA synthetase inhibitory activity.
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