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Plant secretome — From cellular process to biological activity
Authors:Cornelia Krause,Sandra RichterChristian Knö  ll,Gerd Jü  rgens
Affiliation:Center for Plant Molecular Biology (ZMBP), University of Tübingen, Auf der Morgenstelle 3, 72076 Tübingen, Germany
Abstract:Recent studies suggest that plants secrete a large number of proteins and peptides into the extracellular space. Secreted proteins play a crucial role in stress response, communication and development of organisms. Here we review the current knowledge of the secretome of more than ten plant species, studied in natural conditions or during (a)biotic stress. This review not only deals with the classical secretory route via endoplasmic reticulum and Golgi followed by proteins containing a known N-terminal signal peptide, but also covers new findings about unconventional secretion of leaderless proteins. We describe alternative secretion pathways and the involved compartments like the recently discovered EXPO. The well characterized secreted peptides that function as ligands of receptor proteins exemplify the biological significance and activity of the secretome. This article is part of a Special Issue entitled: An Updated Secretome.
Keywords:Secretion   Signaling   Peptide   Arabidopsis   Development   Interaction
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