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Synthetic polynucleotide templates for characterizing sequence-selective small molecule/nucleic acid interactions
1Department of Chemistry, Florida State University, Tallahassee 32306-3006, USA. hecker@vision eri.harvard.edu
Analytical Biochemistry
|January 1, 1997
Summary
Researchers developed a synthetic polynucleotide target for drug-nucleic acid binding assays. This high-information content sequence overcomes limitations of natural DNA in footprinting experiments.
Area of Science:
- Molecular Biology
- Drug Discovery
- Biochemistry
Background:
- Characterizing sequence-selective binding of small molecules to nucleic acids is crucial for drug discovery.
- Natural DNA sequences present challenges in footprinting assays due to unequal base quartet representation and secondary structure formation.
Purpose of the Study:
- To develop a synthetic, minimal-length polynucleotide target for sequence-selective binding assays.
- To create a versatile target for footprinting and related experiments, overcoming limitations of natural DNA.
Main Methods:
- Chemical synthesis of polynucleotide strands and complementary strand generation using DNA polymerase.
- Cloning of double-stranded sequences into pGEM-3Zf(+/-) vectors.
- Utilizing plasmid vector features for expression as single-stranded DNA/RNA or duplexes.
Main Results:
- A 144-nucleotide minimal-length synthetic target sequence was developed and cloned.
- The cloned sequence can be used in double-stranded DNA form or expressed as single-stranded DNA/RNA or duplexes.
- The synthetic target provides comprehensive representation of base quartet recognition sites.
Conclusions:
- The developed synthetic polynucleotide target offers a high-information content solution for studying drug-nucleic acid interactions.
- This approach enhances the utility of footprinting and related assays by overcoming natural DNA limitations.
- The versatile expression options facilitate diverse applications in molecular biology and drug development.