Protein retention and localization in the endoplasmic reticulum and the Golgi apparatus

Protein transport along the secretory pathway is supported by a noria of ve sicles that bud and fuse, load and unload their cargo from one compartment into the other. However, despite this constant flow-through of proteins and lipids the various compartments of the secretory pathway are able to maint ain their own specific composition. Here, we discuss recent insights into m echanisms of protein retention and localization that are necessary for the maintenance of endoplasmic reticulum (ER)- and Golgi-associated typical fun ctions such as protein folding and glycosylation in plant cells. (C) Societ e francaise de biochimie et biologie moleculaire / Elsevier, Paris.