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Vertebrate UDP-glucuronosyltransferases: functional and evolutionary aspects.

Karl Walter Bock1

  • 1Department of Toxicology, Institute of Pharmacology and Toxicology, University of Tübingen, Tübingen, Germany. bock@uni-tuebingen.de

Biochemical Pharmacology
|September 2, 2003
PubMed
Summary

UDP-glucuronosyltransferases (UGTs) are key drug-metabolizing enzymes. This commentary explores the evolution of the glycosyltransferase superfamily, focusing on UGTs

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Area of Science:

  • Biochemistry
  • Evolutionary Biology
  • Pharmacology

Background:

  • UDP-glucuronosyltransferases (UGTs) are crucial phase II drug-metabolizing enzymes.
  • UGTs belong to a larger superfamily of UDP-glycosyltransferases with diverse functions.
  • Understanding UGT evolution is key to comprehending xenobiotic metabolism.

Purpose of the Study:

  • To discuss the evolutionary aspects of the glycosyltransferase superfamily.
  • To emphasize functionally related members involved in detoxication and elimination.
  • To explore the origins and co-regulation of UGTs.

Main Methods:

  • Review and commentary on existing literature.
  • Comparative analysis of UGT families across species.
  • Discussion of evolutionary pressures, such as 'animal-plant warfare'.

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Main Results:

  • Human UGT families likely evolved in vertebrates to combat toxic plant compounds.
  • Co-regulation of UGTs with other drug-metabolizing enzymes may stem from ancient ecological conflicts.
  • Related UDP-glucosyltransferases have evolved independently in insects, plants, and bacteria.

Conclusions:

  • The glycosyltransferase superfamily exhibits diverse evolutionary paths.
  • UGTs play a vital role in detoxification across various organisms.
  • Functional relationships within the superfamily highlight conserved metabolic strategies.