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Journal Article

Structure of the light harvesting antenna from Rhodospirillum molischianum studied by electron microscopy

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Germeroth,  Lothar
Department of Molecular Membrane Biology, Max Planck Institute of Biophysics, Max Planck Society;

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Citation

Boonstra, A. F., Germeroth, L., & Boekema, E. J. (1994). Structure of the light harvesting antenna from Rhodospirillum molischianum studied by electron microscopy. Biochimica et Biophysica Acta, Bioenergetics, 1184(2-3), 227-234. doi:10.1016/0005-2728(94)90227-5.


Cite as: https://hdl.handle.net/21.11116/0000-0007-D2D8-8
Abstract
The structure of two types of isolated light-harvesting antenna complexes from Rhodospirillum molischianum was studied by electron microscopy and image analysis. The B870 reaction center complex forms an almost circular particle with a diameter in the plane of the membrane of about 10.7–11.2 nm. A complex consists of a reaction center surrounded most likely by 12 B870 antennae units. An asymmetrical protrusion, consisting of the cytochrome subunit, gives the reaction center a height of 11.5 nm. The peripheral B800–820 complex is cylindrical, with a diameter of 5.3 nm and a small central indentation. At low resolution, it is structurally very similar to the B800–850 complex of Rhodobacter sphaeroides and is considered to be most likely of the α6β6 type.