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Mitochondrial 2-hydroxyglutarate metabolism.

Martin K M Engqvist1, Christian Eßer2, Alexander Maier3

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|February 25, 2014
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Summary
This summary is machine-generated.

Plants possess distinct metabolic pathways for D- and L-2-hydroxyglutarate (2-HG). These compounds are processed in plant mitochondria by stereospecific dehydrogenases, with implications for understanding human metabolic disorders.

Keywords:
2-HydroxyglutarateLysine metabolismMetabolite repaird-2-Hydroxyacid dehydrogenasel-2-Hydroxyacid dehydrogenase

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Area of Science:

  • Biochemistry
  • Plant Metabolism
  • Molecular Biology

Background:

  • 2-Hydroxyglutarate (2-HG) is a chiral dicarboxylic acid.
  • Mitochondrial D- and L-2HG metabolism is known in eukaryotes, but plant pathways are not fully understood.
  • L-2HG may require metabolic repair, while D-2HG is part of intermediary metabolism.

Purpose of the Study:

  • Elucidate plant D- and L-2-hydroxyglutarate (2-HG) metabolic pathways.
  • Relate plant 2-HG metabolism to other organisms.
  • Investigate mitochondrial catabolic steps and enzyme phylogeny.

Main Methods:

  • Review of current data on plant 2-HG metabolism.
  • Analysis of mitochondrial catabolic pathways.
  • Phylogenetic analysis of 2-hydroxyacid dehydrogenases.

Main Results:

  • D- and L-2-HG are oxidized to 2-ketoglutarate in plant mitochondria by stereospecific dehydrogenases.
  • Plants tolerate high D-2HG concentrations, unlike humans with metabolic deficiencies.
  • Phylogenetic relationships of dehydrogenases provide evolutionary insights.

Conclusions:

  • Plant mitochondrial D- and L-2-hydroxyglutarate (2-HG) metabolism involves stereospecific dehydrogenases.
  • Understanding plant 2-HG pathways offers comparative insights into eukaryotic metabolism.
  • Further research can illuminate the roles and regulation of these pathways.