The cell wall regulates dynamics and size of plasma-membrane nanodomains in Arabidopsis.
Proc Natl Acad Sci U S A
; 116(26): 12857-12862, 2019 06 25.
Article
em En
| MEDLINE
| ID: mdl-31182605
ABSTRACT
Plant plasma-membrane (PM) proteins are involved in several vital processes, such as detection of pathogens, solute transport, and cellular signaling. For these proteins to function effectively there needs to be structure within the PM allowing, for example, proteins in the same signaling cascade to be spatially organized. Here we demonstrate that several proteins with divergent functions are located in clusters of differing size in the membrane using subdiffraction-limited Airyscan confocal microscopy. Single particle tracking reveals that these proteins move at different rates within the membrane. Actin and microtubule cytoskeletons appear to significantly regulate the mobility of one of these proteins (the pathogen receptor FLS2) and we further demonstrate that the cell wall is critical for the regulation of cluster size by quantifying single particle dynamics of proteins with key roles in morphogenesis (PIN3) and pathogen perception (FLS2). We propose a model in which the cell wall and cytoskeleton are pivotal for regulation of protein cluster size and dynamics, thereby contributing to the formation and functionality of membrane nanodomains.
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Base de dados:
MEDLINE
Assunto principal:
Parede Celular
/
Microdomínios da Membrana
Idioma:
En
Ano de publicação:
2019
Tipo de documento:
Article