Chemical Labeling Method for DNA 3'-Phosphoglycolate Termini

A novel chemical labeling method achieves approximately 50% efficiency in selectively conjugating biotin to 3'-phosphoglycolate (3'-PG) termini on synthetic oligonucleotides. This direct tagging approach, using EDC·HCl and NHS activation, provides a foundation for visualizing and quantifying a problematic DNA lesion caused by radiation and genotoxins. The dataset likely contains experimental results demonstrating the specificity of the reaction, which does not modify 3'-phosphate ends.

Use Cases

• Validating a direct labeling protocol for 3'-PG termini based on the described carbodiimide-mediated chemistry.
• Comparing labeling specificity against 3'-phosphate ends using the reported reaction conditions.
• Optimizing biotin conjugation efficiency for future in vitro or cellular detection assays.
• Developing downstream analytical methods (e.g., visualization, pull-down) for 3'-PG lesions in complex samples.

Strengths

• Dataset is openly licensed under CC-BY-4.0, permitting reuse with attribution.
• Method demonstrates high specificity for a single lesion type (3'-PG) without modifying similar 3'-phosphate ends.
• Cross-platform presence on figshare suggests established sharing and potential for community verification.

Limitations

• Column names and a precise row count are not provided, limiting immediate understanding of the data structure.
• The dataset scale (3.4 MB file size) suggests it is a focused proof-of-concept rather than a large-scale experimental survey.
• Data is synthetic (in vitro oligonucleotides), so applicability to complex biological systems is not yet demonstrated.

Provenance

Source

Ryosuke Morozumi

Collection Method

Chemical synthesis and conjugation experiments on synthetic oligonucleotides.

Freshness

Last updated 2026-03-20.