Excitation energy trapping in photosystem I complexes depleted in Lhca1 and Lhca4
Copyright policy )Excitation energy trapping in photosystem I complexes depleted in Lhca1 and Lhca4
We report a time‐resolved fluorescence spectroscopy characterization of photosystem I (PSI) particles prepared from Arabidopsis lines with knock‐out mutations against the peripheral antenna proteins of Lhca1 or Lhca4. The first mutant retains Lhca2 and Lhca3 while the second retains one other light‐harvesting protein of photosystem I (Lhca) protein, probably Lhca5. The results indicate that Lhca2/3 and Lhca1/4 each provides about equally effective energy transfer routes to the PSI core complex, and that Lhca5 provides a less effective energy transfer route. We suggest that the specific location of each Lhca protein within the PSI–LHCI supercomplex is more important than the presence of so‐called red chlorophylls in the Lhca proteins.
- Umeå University Sweden
- Vrije Universiteit Amsterdam Netherlands
- Vrije Universiteit Amsterdam - Department of Physics and Astronomy Netherlands
- Umeå Plant Science Centre Sweden
Light-harvesting, Light, Photosystem I Protein Complex, Arabidopsis Proteins, Arabidopsis, Light-Harvesting Protein Complexes, Excitation energy trapping, Spectrometry, Fluorescence, Mutation, Photosynthesis, Chlorophyll Binding Proteins, Oxidation-Reduction, Plant Proteins
Light-harvesting, Light, Photosystem I Protein Complex, Arabidopsis Proteins, Arabidopsis, Light-Harvesting Protein Complexes, Excitation energy trapping, Spectrometry, Fluorescence, Mutation, Photosynthesis, Chlorophyll Binding Proteins, Oxidation-Reduction, Plant Proteins
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