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Lipid function in plant cell polarity |
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| Authors: | Fischer Urs Men Shuzhen Grebe Markus |
| Institution: | Ume? Plant Science Centre, Department of Forest Genetics and Plant Physiology, Swedish University of Agricultural Sciences, 90183 Ume?, Sweden. |
| Abstract: | The establishment and maintenance of cell polarity play pivotal roles during plant development. During the past five years, proteins that are required for different aspects of plant cell polarity have been identified. However, the functions of lipids and their interactions with proteins that mediate polarity remained largely unaddressed. Recent genetic studies have discovered cell and tissue polarity mutants that have defects in sterol composition, glycosylphosphatidylinositol-anchored proteins, glycosylphosphatidylinositol biosynthesis and phospholipid signalling. Analyses of the affected gene products have provided a first glance at the roles of lipids in cell polarity signalling, as well as in the trafficking and anchoring of polar proteins. |
| Keywords: | Abbreviations: AGC cAMP/cGMP-dependent kinase/protein kinase C family kinase AGP arabinogalactan protein AtPDK1 Arabidopsis thaliana 3′-PHOSPHOINOSITIDE KINASE1 AUX1 AUXIN-RESISTANT1 CVP1 COTYLEDON VASCULAR PATTERN1 DAG diacylglycerol ERG6 ERGOSTEROL-DEFICIENT6 GAP GPI-anchored protein GFP green fluorescent protein GPI glycosylphosphatidylinositol Ins[1 4 5]P3 inositol 1 4 5-trisphosphate nod factor nodulation factor PA phosphatidic acid PIN2 PIN-FORMED2 PL phospholipase PLDζ1 phospholipase Dζ1 PM plasma membrane sku5 skewed5 SMT STEROL METHYLTRANSFERASE sos5 salt-overly-sensitive 5 |
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