Diffusion of light-harvesting complex II in the thylakoid membranes.
The light-harvesting complex II (LHCII) is the main energy absorber for photosynthesis in green plants, and its translocation between photosystems I and II is the primary means of energy redistribution between them. Using single-particle tracking, we performed the first measurement of the mobility of LHCII in the photosynthetic membranes in both the nonphosphorylated and the phosphorylated (P-LHCII) conformations. These are part of an important, reversible, energy re-equilibration process called the state transition. We found that the population of P-LHCII in unappressed membranes is more mobile than the population of non-P-LHCII from the same regions.
Consoli
Elena
E
Department of Biology and Interdisciplinary Center for Nanostructured Materials and Interfaces (CIMAINA), University of Milan, Italy.
Croce
Roberta
R
Dunlap
David D
DD
Finzi
Laura
L
D055592:Biophysical Phenomena; D001703:Biophysics; D002462:Cell Membrane / Q000378:metabolism; D002734:Chlorophyll; D002736:Chloroplasts / Q000378:metabolism; D004058:Diffusion; D008027:Light; D045342:Light-Harvesting Protein Complexes; D046911:Macromolecular Substances; D018715:Microscopy, Video; D008863:Microspheres; D008958:Models, Molecular; D015233:Models, Statistical; D010766:Phosphorylation; D045332:Photosystem II Protein Complex / Q000378:metabolism*; D018515:Plant Leaves / Q000378:metabolism; D010940:Plant Proteins / Q000378:metabolism; D011485:Protein Binding; D018724:Spinacia oleracea / Q000378:metabolism; D013696:Temperature; D020524:Thylakoids / Q000378:metabolism*; D013997:Time Factors
D045342:Light-Harvesting Protein Complexes; D046911:Macromolecular Substances; D045332:Photosystem II Protein Complex; D010940:Plant Proteins; D002734:Chlorophyll