The monomeric photosystem I-complex of the diatom Phaeodactylum tricornutum binds specific fucoxanthin chlorophyll proteins (FCPs) as light-harvesting complexes.

A photosystem I (PSI)-fucoxanthin chlorophyll protein (FCP) complex with a chlorophyll a/P700 ratio of approximately 200:1 was isolated from the diatom Phaeodactylum tricornutum. Spectroscopic analysis proved that the more tightly bound FCP functions as a light-harvesting complex, actively transferring light energy from its accessory pigments chlorophyll c and fucoxanthin to the PSI core. Using an antibody against all FCP polypeptides of Cyclotella cryptica it could be shown that the polypeptides of the major FCP fraction differ from the FCPs found in the PSI fraction. Since these FCPs are tightly bound to PSI, active in energy transfer, and not found in the main FCP fraction, we suppose them to be PSI specific. Blue Native-PAGE, gel filtration and first electron microscopy studies of the PSI-FCP sample revealed a monomeric complex comparable in size and shape to the PSI-LHCI complex of green algae.

• Publication year

  2007

• Venue

  Biochimica et Biophysica Acta

• Publication date

  2007-12-01

• Fields of study

  Biology, Medicine, Chemistry, Environmental Science

• Identifiers
  DOI 10.1016/J.BBABIO.2007.09.004PMID 18028870
• External record

  Open on Semantic Scholar

• Source metadata

  Semantic Scholar, PubMed

• No claims are published for this paper.

• No concepts are published for this paper.

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