Immune-purification of a dimeric subcomplex of the respiratory NAHD-CoQ reductase of Rhodobacter capsulatus equivalent to the FP fraction of the mitochondrial complex I

  • Duborjal H
  • Dupuis A
  • Chapel A
 et al. 
  • 3


    Mendeley users who have this article in their library.
  • 11


    Citations of this article.


The Rhodobacter capsulatus genes encoding the NUOE and NUOF subunits, equivalent to the 24 kDa and 51 kDa subunits of the mammalian mitochondrial complex I, have been sequenced. According to the nucleotide sequence, the NUOE subunit is 389 amino acids long and has a molecular mass of 41.3 kDa. In comparison to the mitochondrial equivalent subunit, NUOE is extended at the C terminus by more than 150 amino acids. The NUOF subunit is 431 amino acids long and has a molecular mass of 47.1 kDa. A subcomplex containing both the NUOE and NUOF subunits was extracted by detergent treatment of R. capsulatus membranes and immune-purified. This subcomplex is homologous to the mitochondrial FP fragment. Mass spectrometry after trypsin treatment of the NUOE subunit validates the atypical primary structure deduced from the sequence of the gene.

Author-supplied keywords

  • Complex I
  • Gene sequence
  • Immunopurification
  • MALDI mass spectrometry
  • Mitochondrion
  • Rhodobacter capsulatus

Get free article suggestions today

Mendeley saves you time finding and organizing research

Sign up here
Already have an account ?Sign in

Find this document


  • Hervé Duborjal

  • Alain Dupuis

  • Agnès Chapel

  • Silvie Kieffer

  • Joël Lunardi

  • Jean Paul Issartel

Cite this document

Choose a citation style from the tabs below

Save time finding and organizing research with Mendeley

Sign up for free