Photosystem I pp 499-513 | Cite as

Electron Transfer Between Photosystem I and Plastocyanin or Cytochrome c6

  • Michael Hippler
  • Friedel Drepper
Part of the Advances in Photosynthesis and Respiration book series (AIPH, volume 24)


Electron transfer between photosystem I (PS I) and its soluble lumenal electron donors plastocyanin (pc) or cytochrome c6 (cyt c6) is an essential reaction in photosynthetic electron transport that is required to reduce the photooxidized primary donor P700+. PS I is an integral light driven plastocyanin (cytochrome c6):ferredoxin oxidoreductase that is embedded in the thylakoid membrane, which uses light energy to transport electrons from a lumenal, soluble electron carrier across the membrane to the stromal, soluble electron acceptor ferredoxin. Two types of interactions between PS I and soluble electron transfer donors can be distinguished, namely interactions that are based on electrostatic attraction and hydrophobic contact.


Electron Transfer Donor Side Midpoint Potential Synechococcus Elongatus Redox Midpoint Potential 
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Copyright information

© Springer 2006

Authors and Affiliations

  • Michael Hippler
    • 1
  • Friedel Drepper
    • 2
  1. 1.Department of BiologyUniversity of PennsylvaniaPhiladelphiaUSA
  2. 2.Biochemie der PflanzenUniversit ät FreiburgSchänzlestrGermany

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