Preliminary molecular characterization and crystallization of mitochondrial respiratory complex II from porcine heart

FEBS J. 2007 Mar;274(6):1524-9. doi: 10.1111/j.1742-4658.2007.05698.x.

Abstract

The mitochondrial respiratory complex II, or succinate:ubiquinone oxidoreductase, is an integral membrane protein complex in both the tricarboxylic acid cycle (Krebs cycle) and aerobic respiration. The gene sequences of each complex II subunit were measured by RT-PCR. N-terminal sequencing work was performed to identify the mitochondrial targeting signal peptide of each subunit. Complex II was extracted from porcine heart and purified by the ammonium sulfate precipitation method. The sample was solubilized by 0.5% (w/v) sugar detergent n-decyl-beta-D-maltoside, stabilized by 200 mM sucrose, and crystallized with 5% (w/v) poly(ethylene glycol) 4000. Important factors for the extraction, purification and crystallization of mitochondrial respiratory complex II are discussed.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Amino Acid Sequence
  • Animals
  • Base Sequence
  • Crystallization
  • DNA Primers
  • Electron Transport Complex II / chemistry
  • Electron Transport Complex II / genetics
  • Electron Transport Complex II / isolation & purification
  • Electron Transport Complex II / metabolism*
  • Electrophoresis, Polyacrylamide Gel
  • Molecular Sequence Data
  • Myocardium / metabolism*
  • Polymerase Chain Reaction
  • Swine
  • Transcription, Genetic

Substances

  • DNA Primers
  • Electron Transport Complex II