Excitation energy trapping in photosystem I complexes depleted in Lhca1 and Lhca4.
2005 (English)In: FEBS Letters, ISSN 0014-5793, Vol. 579, no 21, 4787-91 p.Article in journal (Refereed) Published
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.
Place, publisher, year, edition, pages
2005. Vol. 579, no 21, 4787-91 p.
Arabidopsis/genetics/*physiology, Arabidopsis Proteins/genetics/*metabolism, Light, Light-Harvesting Protein Complexes/genetics/*metabolism, Mutation, Oxidation-Reduction, Photosystem I Protein Complex/genetics/*metabolism, Plant Proteins/genetics/metabolism, Spectrometry; Fluorescence
IdentifiersURN: urn:nbn:se:umu:diva-14226DOI: doi:10.1016/j.febslet.2005.06.091PubMedID: 16098971OAI: oai:DiVA.org:umu-14226DiVA: diva2:153897