Rhodopsin-mediated photoreception in cryptophyte flagellates.

  title={Rhodopsin-mediated photoreception in cryptophyte flagellates.},
  author={Oleg A. Sineshchekov and Elena G. Govorunova and K Jung and Stefan Zauner and U Maier and John L. Spudich},
  journal={Biophysical journal},
  volume={89 6},
We show that phototaxis in cryptophytes is likely mediated by a two-rhodopsin-based photosensory mechanism similar to that recently demonstrated in the green alga Chlamydomonas reinhardtii, and for the first time, to our knowledge, report spectroscopic and charge movement properties of cryptophyte algal rhodopsins. The marine cryptophyte Guillardia theta exhibits positive phototaxis with maximum sensitivity at 450 nm and a secondary band above 500 nm. Variability of the relative sensitivities… CONTINUE READING