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A two-dimensional many-body system with competing interactions as a model for segregation of photosystems in thylakoids of green plants
Umeå University, Faculty of Science and Technology, Department of Plant Physiology. Umeå University, Faculty of Science and Technology, Umeå Plant Science Centre (UPSC).
2000 (English)In: European Biophysics Journal, ISSN 0175-7571, E-ISSN 1432-1017, Vol. 29, no 3, 214-220 p.Article in journal (Refereed) Published
Abstract [en]

We address the segregation of photosystems I (PSI) and II (PSII) in thylakoid membranes by means of a molecular dynamics method. We assume a two-dimensional (in-plane) problem with PSI and PSII being represented by particles with different values of negative charge. The pair interactions between particles include a screened Coulomb repulsive part and am exponentially decaying attractive part. Our modeling results suggest that the system may have a complicated phase behavior, including a quasi-crystalline phase at low ionic screenmg, a disordered phase and: in addition, a possible "clotting" agglomerate phase at high screening where the photosystems tend to clot together. The relevance of the observed phenomena to the stacking of thylakoid membranes is discussed.

Place, publisher, year, edition, pages
2000. Vol. 29, no 3, 214-220 p.
Keyword [en]
lipid-protein interactions, photosystem I, photosystem II, thylakoid membranes
URN: urn:nbn:se:umu:diva-44776ISI: 000088497300007OAI: diva2:423075
Available from: 2011-06-14 Created: 2011-06-09 Last updated: 2011-06-14

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Oquist, Gunnar
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Department of Plant PhysiologyUmeå Plant Science Centre (UPSC)
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