An alternative oxidase monoclonal antibody recognises a highly conserved sequence among alternative oxidase subunits

FEBS Lett. 1999 Mar 19;447(1):21-4. doi: 10.1016/s0014-5793(99)00259-8.


The alternative oxidase is found in the inner mitochondrial membranes of plants and some fungi and protists. A monoclonal antibody raised against the alternative oxidase from the aroid lily Sauromatum guttatum has been used extensively to detect the enzyme in these organisms. Using an immunoblotting strategy, the antibody binding site has been localised to the sequence RADEAHHRDVNH within the soybean alternative oxidase 2 protein. Examination of sequence variants showed that A2 and residues C-terminal to H7 are required for recognition by the monoclonal antibody raised against the alternative oxidase. The recognition sequence is highly conserved among all alternative oxidase proteins and is absolutely conserved in 12 of 14 higher plant sequences, suggesting that this antibody will continue to be extremely useful in studying the expression and synthesis of the alternative oxidase.

Publication types

  • Comparative Study
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Amino Acid Sequence
  • Antibodies, Monoclonal
  • Antibody Specificity*
  • Binding Sites
  • Conserved Sequence*
  • Mitochondrial Proteins
  • Molecular Sequence Data
  • Oxidoreductases / genetics
  • Oxidoreductases / immunology*
  • Plant Proteins / genetics
  • Plant Proteins / immunology*
  • Recombinant Fusion Proteins / immunology
  • Sequence Homology, Amino Acid
  • Soybeans / enzymology*
  • Species Specificity


  • Antibodies, Monoclonal
  • Mitochondrial Proteins
  • Plant Proteins
  • Recombinant Fusion Proteins
  • Oxidoreductases
  • alternative oxidase