Lipid Raft, Regulator of Plasmodesmal Callose HomeostasisReport as inadecuate


Lipid Raft, Regulator of Plasmodesmal Callose Homeostasis


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Division of Applied Life Science BK21 Plus program, Plant Molecular Biology and Biotechnology Research Center, Gyeongsang National University, Jinju 660-701, Korea





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Academic Editor: Milan Stankovic

Abstract Abstract: The specialized plasma membrane microdomains known as lipid rafts are enriched by sterols and sphingolipids. Lipid rafts facilitate cellular signal transduction by controlling the assembly of signaling molecules and membrane protein trafficking. Another specialized compartment of plant cells, the plasmodesmata PD, which regulates the symplasmic intercellular movement of certain molecules between adjacent cells, also contains a phospholipid bilayer membrane. The dynamic permeability of plasmodesmata PDs is highly controlled by plasmodesmata callose PDC, which is synthesized by callose synthases CalS and degraded by β-1,3-glucanases BGs. In recent studies, remarkable observations regarding the correlation between lipid raft formation and symplasmic intracellular trafficking have been reported, and the PDC has been suggested to be the regulator of the size exclusion limit of PDs. It has been suggested that the alteration of lipid raft substances impairs PDC homeostasis, subsequently affecting PD functions. In this review, we discuss the substantial role of membrane lipid rafts in PDC homeostasis and provide avenues for understanding the fundamental behavior of the lipid raft–processed PDC. View Full-Text

Keywords: lipid raft; sterol; sphingolipid; plasmodesmata; plasmodesmata callose lipid raft; sterol; sphingolipid; plasmodesmata; plasmodesmata callose





Author: Arya Bagus Boedi Iswanto and Jae-Yean Kim *

Source: http://mdpi.com/



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