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Trends Cell Biol. 2006 Jul;16(7):370-5.

14-3-3 proteins: regulation of endoplasmic reticulum localization and surface expression of membrane proteins.

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  • 1Department of Neuroscience and High Throughput Biology Center, School of Medicine, Johns Hopkins University, 733 North Broadway, Baltimore, MD 21205, USA.

Abstract

The density and composition of cell surface proteins are major determinants for cellular functions. Regulation of cell surface molecules occurs at several levels, including the efficiency of surface transport, and is therefore of great interest. As the major phosphoprotein-binding modules, 14-3-3 proteins are known for their crucial roles in a wide range of cellular activities, including the subcellular localization of target proteins. Accumulating evidence suggests a role for 14-3-3 in surface transport of membrane proteins, in which 14-3-3 binding reduces endoplasmic reticulum (ER) localization, thereby promoting surface expression of membrane proteins. Here, we focus on recent evidence of 14-3-3-mediated surface transport and discuss the possible molecular mechanisms.

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