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Author Gershlick, David C. ♦ Lousa, Carine de Marcos ♦ Foresti, Ombretta ♦ Lee, Andrew J. ♦ Pereira, Estela A. ♦ Dasilva, Luis L. P. ♦ Bottanelli, Francesca ♦ Denecke, Jurgen
Source World Health Organization (WHO)-Global Index Medicus
Content type Text
Publisher American Society of Plant Biologists
File Format HTM / HTML
Language English
Difficulty Level Medium
Subject Domain (in DDC) Computer science, information & general works ♦ Library & information sciences ♦ Natural sciences & mathematics ♦ Chemistry & allied sciences ♦ Life sciences; biology ♦ Physiology & related subjects ♦ Biochemistry ♦ Natural history of organisms ♦ Technology ♦ Medicine & health ♦ Human anatomy, cytology, histology ♦ Human physiology ♦ Pharmacology and therapeutics
Subject Domain (in MeSH) Cells ♦ Anatomy ♦ Eukaryota ♦ Organisms ♦ Amino Acids, Peptides, and Proteins ♦ Chemicals and Drugs ♦ Chemical Phenomena ♦ Metabolism ♦ Biological Sciences ♦ Information Science ♦ Information Science
Subject Keyword Discipline Botany ♦ Golgi Apparatus ♦ Metabolism ♦ Plant Proteins ♦ Tobacco ♦ Vacuoles ♦ Amino Acid Sequence ♦ Endoplasmic Reticulum ♦ Molecular Sequence Data ♦ Chemistry ♦ Protein Binding ♦ Protein Transport ♦ Journal Article ♦ Research Support, Non-u.s. Gov't
Abstract The cycling of vacuolar sorting receptors (VSRs) between early and late secretory pathway compartments is regulated by signals in the cytosolic tail, but the exact pathway is controversial. Here, we show that receptor targeting in tobacco (Nicotiana tabacum) initially involves a canonical coat protein complex II-dependent endoplasmic reticulum-to-Golgi bulk flow route and that VSR-ligand interactions in the cis-Golgi play an important role in vacuolar sorting. We also show that a conserved Glu is required but not sufficient for rate-limiting YXX-mediated receptor trafficking. Protein-protein interaction studies show that the VSR tail interacts with the µ-subunits of plant or mammalian clathrin adaptor complex AP1 and plant AP4 but not that of plant and mammalian AP2. Mutants causing a detour of full-length receptors via the cell surface invariantly cause the secretion of VSR ligands. Therefore, we propose that cycling via the plasma membrane is unlikely to play a role in biosynthetic vacuolar sorting under normal physiological conditions and that the conserved Ile-Met motif is mainly used to recover mistargeted receptors. This occurs via a fundamentally different pathway from the prevacuolar compartment that does not mediate recycling. The role of clathrin and clathrin-independent pathways in vacuolar targeting is discussed.
Description Country affiliation: United kingdom
Author Affiliation: Gershlick DC ( Centre for Plant Sciences, School of Biology, Faculty of Biological Sciences, University of Leeds, Leeds LS2 9JT, United Kingdom.)
ISSN 10404651
Educational Role Student ♦ Teacher
Age Range above 22 year
Educational Use Reading ♦ Research ♦ Self Learning
Interactivity Type Expositive
Education Level UG and PG
Learning Resource Type Article
Publisher Date 2014-03-01
Publisher Place United States
e-ISSN 1531298X
Journal THE PLANT CELL ONLINE
Volume Number 26
Issue Number 3


Source: WHO-Global Index Medicus