Photosensitivity in sponge due to cytochrome c oxidase?

Photochem Photobiol Sci. 2009 Jun;8(6):755-7. doi: 10.1039/b904988f. Epub 2009 Apr 6.


An action spectrum for photosensitivity in sponge larvae published by Leys et al. [J. Comp. Physiol., A, 2002, 188, 199-202] was interpreted by the authors as being due to a combination of light absorption by flavin or carotenoid in the blue region, and another pigment such as pterin in the long-wavelength region. Here we show here that their action spectrum closely matches the absorption spectrum of reduced cytochrome c oxidase that is present in sponges, and compare with other photoreactions which are thought to be due to this chromoprotein.

MeSH terms

  • Absorption
  • Amino Acid Sequence
  • Animals
  • Cattle
  • Electron Transport Complex IV / chemistry
  • Electron Transport Complex IV / metabolism*
  • Larva / enzymology
  • Larva / radiation effects
  • Light*
  • Molecular Sequence Data
  • Porifera / enzymology*
  • Porifera / radiation effects*
  • Sequence Alignment


  • Electron Transport Complex IV