Structure of a bacterial photosynthetic membrane
AUTOR(ES)
Miller, Kenneth R.
RESUMO
The internal photosynthetic membranes of a photosynthetic bacterium, Rhodopseudomonas viridis, have been studied with a variety of electron microscope techniques. The membranes are composed of a sheet of apparently identical subunits arranged in a hexagonal fashion. The individual subunits repeat at a distance of 110 Å. Optical transforms have been used to enhance micrographs of this ordered membrane, and the images synthesized in this way show details of each subunit. The individual subunits are asymmetric, differing slightly in appearance at the outer and inner surfaces of the membrane, and these surface patterns seem to be combined in the image of the thylakoid membrane in negative stain. These studies fix a maximum size for the photosynthetic unit of R. viridis and suggest the suitability of this membrane for further diffraction analysis.
ACESSO AO ARTIGO
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=411875Documentos Relacionados
- Projection structure and molecular architecture of OxlT, a bacterial membrane transporter
- Review of Breton and Verméglio, The Photosynthetic Bacterial Reaction Center II: Structure, Spectroscopy, and Dynamics
- Discovery of a protein required for photosynthetic membrane assembly
- The long-range organization of a native photosynthetic membrane
- Gene expression of pigment-binding proteins of the bacterial photosynthetic apparatus: Transcription and assembly in the membrane of Rhodopseudomonas capsulata