A Sco homologue plays a role in defence against oxidative stress in pathogenic Neisseria

FEBS Lett. 2003 Jul 10;546(2-3):411-5. doi: 10.1016/s0014-5793(03)00632-x.


Sco proteins are found in mitochondria and in a variety of oxidase positive bacteria. Although Sco is required for the formation of the Cu(A) centre in a cytochrome oxidase of the aa(3) type, it was observed that oxidases with a Cu(A) centre are not present in many bacteria that contain a Sco homologue. Two bacteria of this type are the pathogens Neisseria meningitidis and Neisseria gonorrhoeae. The sco genes of N. gonorrhoeae strain 1291 and N. meningitidis strain MC58 were cloned, inactivated by inserting a kanamycin resistance cassette and used to make knockout mutants by allelic exchange. Both N. gonorrhoeae and N. meningitidis sco mutants were highly sensitive to oxidative killing by paraquat, indicating that Sco is involved in protection against oxidative stress in these bacteria.

Publication types

  • Research Support, Non-U.S. Gov't
  • Research Support, U.S. Gov't, P.H.S.

MeSH terms

  • Amino Acid Sequence
  • Bacterial Proteins / chemistry
  • Bacterial Proteins / physiology*
  • Base Sequence
  • DNA Primers
  • Electron Transport Complex IV / metabolism
  • Molecular Sequence Data
  • Neisseria gonorrhoeae / enzymology
  • Neisseria gonorrhoeae / physiology*
  • Neisseria meningitidis / enzymology
  • Neisseria meningitidis / physiology*
  • Oxidative Stress*
  • Sequence Homology, Amino Acid


  • Bacterial Proteins
  • DNA Primers
  • Electron Transport Complex IV