Abstract

Base J replaces 1% of thymine in most kinetoplastid flagellates, and is implicated in transcription regulation. Base J is synthesized in two steps: first, a thymine base in DNA is converted to 5-hydroxymethyluracil by J-binding proteins (JBP1, JBP2); secondly, a glucosyl transferase glycosylates the 5-hydroxymethyluracil to form base J. Here, we present a highly sensitive and selective LC-MS/MS method to quantify the in vitro JBP1 activity on synthetic oligonucleotide substrates. The method demonstrated successful to support biochemical studies of JBPs and can be used as a template for additional JBP activity studies or for inhibitor screening in the future.

Original languageEnglish
Article number113930
Number of pages4
JournalAnalytical Biochemistry
Volume610
DOIs
Publication statusPublished - 1 Dec 2020

Keywords

  • JBP1/2
  • LC-MS/MS
  • 5-hydroxymethyl-2′ -deoxyuridine
  • Base J

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