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ISSN: 2329-9029

Journal of Plant Biochemistry & Physiology
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Research Article

Mobility of Group 1b Remorins in Membrane Nanodomains Differs Significantly between Mesophyll Cells and Protoplasts

Blachutzik JO1,2, Ines Kreuzer1, Rainer Hedrich1 and Gregory S Harms2,3*
1Institute for Molecular Plant Physiology and Biophysics, University Würzburg, Julius-von-Sachs Platz 2; D-97082 Germany
2Microscopy Group, Rudolf Virchow Center, University of Würzburg, Josef Schneider Str. 2, D15, D-97080 Würzburg, Germany
3Departments of Biology, Engineering and Physics, Wilkes University, 84 W. South St., Wilkes-Barre, PA, 18766, USA
Corresponding Author : Gregory Harms, Assoc. Prof, Ph.D
Director of Bioengineering Departments of Biology
Engineering and Physics Wilkes University
84 W. South St. Wilkes-Barre. PA. 18766, USA
Tel: +1 570 408 4828/+49 171 127 4098
E-mail: [email protected]
Received July 13, 2015; Accepted July 31, 2015; Published August 07, 2015
Citation: Blachutzik JO, Kreuzer I, Hedrich R, Harms GS (2015) Mobility of Group 1b Remorins in Membrane Nanodomains Differs Significantly between Mesophyll Cells and Protoplasts. J Plant Biochem Physiol 3:153. doi:10.4172/2329-9029.1000153
Copyright: © 2015 Blachutzik JO, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
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Abstract

Arabidopsis plasma membrane nanodomains have been visualized in vivo using Remorin proteins of the taxonomic group 1b. The physiological role of such domains is to facilitate protein-protein interactions near the plasma membrane and to act as signal transducing platforms, routing information from the extra- to the intracellular side of the cell. Beneath sterols and sphingolipids as lipid components, group 1b Remorin proteins showed a strong tendency to accumulate in nanodomains. In contrast to sterol- and sphingolipid enriched membrane domaincounterparts in animals, individual Arabidopsis nanodomains did not exhibit any kind of lateral movement in the plane of the membrane. Since group 1b Remorins are reported to form microfilaments in vitro, assemblies of Remorin microfilaments with stable structures could have an impact on domains´ lateral stability in the plane of the membrane. To test a possible influence of cell wall components on the mobility of individual Remorin proteins resident in plasma membrane nanodomains FRAP-experiments were performed in Arabidopsis mesophyll tissue and protoplasts, using fluorescently labeled group 1b Remorins. It was revealed that the cell wall has a stabilizing effect on the mobility of individual Remorins resident in nanodomains.

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