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Aptamers that bind to the antibiotic moenomycin A
H Schürer1, K Stembera, D Knoll
1Universität Leipzig, Institut für Biochemie, Talstr. 33, D-04103, Leipzig, Germany.
Bioorganic & Medicinal Chemistry
|September 15, 2001
Summary
Nuclease-resistant aptamers were developed to bind moenomycin, a key component in bacterial cell wall synthesis. These aptamers can identify moenomycin precursors, enabling new diagnostic tools.
Area of Science:
- Biochemistry
- Molecular Biology
- Synthetic Biology
Background:
- Moenomycin is a phosphoglycolipid antibiotic crucial for bacterial cell wall synthesis.
- Developing selective assays for moenomycin and its precursors is important for understanding biosynthesis and potential therapeutic applications.
Purpose of the Study:
- To select and characterize nuclease-resistant aptamers capable of binding moenomycin.
- To investigate the specificity of these aptamers for moenomycin and its analogues.
- To explore the potential of these aptamers in developing diagnostic assays.
Main Methods:
- Systematic Evolution of Ligands by Exponential Enrichment (SELEX) was used to select aptamers.
- Nuclease resistance assays were performed to ensure aptamer stability.
- Dissociation constant (Kd) measurements determined binding affinity.
- Competition binding experiments were conducted to assess specificity.
Main Results:
- Nuclease-resistant aptamers with dissociation constants in the 300–400 nM range were successfully selected.
- Competition experiments confirmed that the selected aptamers specifically recognize a disaccharide analogue of moenomycin.
- The findings indicate high specificity for a moenomycin precursor structure.
Conclusions:
- The selected aptamers demonstrate high affinity and specificity for moenomycin precursors.
- These aptamers provide a foundation for developing novel, selective, and sensitive assays for moenomycin biosynthesis.
- This work opens avenues for improved diagnostics and research into moenomycin-related pathways.