Abstract
The phase transitional behaviour of bilayers of the phospholipid l-α-ditridecanoylphos-phatidylcholine is studied as a function of protein content for the reaction center (RC) and an antenna protein (LHCP) of the bacterial photosynthetic apparatus. As membrane and protein are structurally well characterized the experimental results can be quantitatively compared with those of calculations based upon elastic models within the Landaude Gennes-theory. Agreement between theory and experiment demonstrates that dominant elastic forces result from a mismatch of hydrophobic regions of membrane and protein. The data also indicate that RC are present in a monomeric form and LHCP in a highly aggregated form. In addition, the latter protein responds to changes in the lipid environment.
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Peschke, J., Riegler, J. & Möhwald, H. Quantitative analysis of membrane distortions induced by mismatch of protein and lipid hydrophobic thickness. Eur Biophys J 14, 385–391 (1987). https://doi.org/10.1007/BF00254861
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DOI: https://doi.org/10.1007/BF00254861