Biochemistry, Genetics and Molecular Biology
8 years ago

New discovery sheds light on how bacteria harness solar power efficiently.

Biochimica et Biophysica Acta (BBA) - Bioenergetics
Separation of Photosystems I and II from the oxychlorobacterium (prochlorophyte) Prochlorothrix hollandica and association of chlorophyll b binding antennae with Photosystem II
Georg W.M. van der Staay, Annet Brouwer, Robert L. Baard, Frank van Mourik, Hans C. P. Matthijs

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Photosystem I and Photosystem II were separated from a type of bacteria called Prochlorothrix hollandica, along with chlorophyll a/b-protein complexes. This was done by using a detergent and centrifugation. The chlorophyll a/b antennae were found to be located near Photosystem II. The antennae contained four different proteins and had a ratio of about 4 parts chlorophyll a to 1 part chlorophyll b. Unlike plants and green algae, Prochlorothrix does not have a separate chlorophyll b-containing antenna for Photosystem I.