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Reductive alkylation with oxidized nucleotides. Use in affinity labeling or affinity chromatography
The Journal of Biological Chemistry
|December 15, 1985
Summary
Researchers explored reactions between oxidized ribonucleotides and amines. Using periodate-oxidized adenosine and glycine with sodium cyanoborohydride, they identified a stable adenine derivative, crucial for creating reliable affinity matrices.
Area of Science:
- Biochemistry
- Organic Chemistry
- Molecular Biology
Background:
- Nucleotide modification is key for biochemical applications.
- Understanding reactions of oxidized nucleotides is essential for developing new tools.
Purpose of the Study:
- To characterize the product of periodate-oxidized adenosine reacting with glycine.
- To evaluate the stability of affinity matrices generated from oxidized nucleotides.
Main Methods:
- Periodate oxidation of adenosine and ATP.
- Reaction with primary amines (glycine, diaminohexane).
- Purification and characterization using NMR, UV spectroscopy, and TLC.
- Affinity column generation and stability testing.
Main Results:
- A stable adenine derivative, adenine 9,2'-(4'-carboxymethyl-6'-hydroxymethylmorpholine), was synthesized and characterized.
- Sodium cyanoborohydride (NaCNBH3) treatment is critical for forming stable affinity matrices from oxidized nucleotides.
- Untreated matrices were unstable, impacting their utility as affinity labels.
Conclusions:
- The study identifies a stable product from oxidized adenosine and glycine.
- NaCNBH3 is essential for creating stable oxidized nucleotide-based affinity matrices.
- This finding helps explain variability in protein affinity labeling experiments.