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In Vitro Biochemical Assays using Biotin Labels to Study Protein-Nucleic Acid Interactions
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Published on: July 17, 2019

Biotin requirements for DNA damage prevention.

Janos Zempleni1, Daniel Camara Teixeira, Toshinobu Kuroishi

  • 1Department of Nutrition and Health Sciences, University of Nebraska-Lincoln, 316 Ruth Leverton Hall, Lincoln, NE 68583-0806, USA. jzempleni2@unl.edu

Mutation Research
|August 30, 2011
PubMed
Summary

Biotin deficiency may impair genome stability by affecting gene repression mechanisms. Holocarboxylase synthetase plays a key role in this process, potentially explaining birth defects in deficient models.

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Area of Science:

  • Biochemistry
  • Molecular Biology
  • Genetics

Background:

  • Biotin is a coenzyme for carboxylases and is attached to histones.
  • Holocarboxylase synthetase catalyzes biotinylation of both carboxylases and histones.
  • Current biotin intake recommendations are estimations and do not consider genome stability effects.

Purpose of the Study:

  • To investigate the role of biotin in maintaining genome stability.
  • To explore the mechanisms by which biotin deficiency impacts gene expression and chromatin structure.
  • To understand the potential link between biotin deficiency and birth defects.

Main Methods:

  • Review of recent studies on biotin metabolism and genome regulation.
  • Analysis of proposed mechanisms involving holocarboxylase synthetase, biotinylated histones, and epigenetic modifications.
  • Correlation of findings with observations in biotin-deficient animal models.

Main Results:

  • Biotin deficiency may lead to genome instability through de-repression of long terminal repeats.
  • Holocarboxylase synthetase's role in chromatin complex formation is crucial for gene repression.
  • Evidence suggests interactions between holocarboxylase synthetase, methyl-CpG-binding domain protein 2, and histone methyl transferases.

Conclusions:

  • Biotin is essential for maintaining genome stability beyond its role as a coenzyme.
  • Holocarboxylase synthetase mediates epigenetic interactions crucial for gene repression.
  • These mechanisms may explain certain birth defects observed in biotin deficiency.