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Traffic. 2010 Sep;11(9):1119-28. doi: 10.1111/j.1600-0854.2010.01098.x. Epub 2010 Jul 1.

The emerging role of VHS domain-containing Tom1, Tom1L1 and Tom1L2 in membrane trafficking.

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1
Institute for Biomedical Research, Xiamen University, Xiamen, Fujian 361005, the People's Republic of China.

Abstract

The maintenance of cellular homeostasis and execution of regulatory mechanisms to dynamically govern various cellular processes require the correct delivery of proteins to their target subcellular compartments. It is estimated that over 30% of the proteins encoded by the human genome, projected to encode about 25 000 proteins and other macromolecules, are delivered to the secretory and endocytic pathways where movement of proteins between various compartments is primarily mediated by vesicles/carriers budding from one compartment for delivery to another. Sorting of cargo proteins into budding vesicles/carriers is mediated by adaptors that link the cargo proteins to the coat proteins. The adaptor function of VHS domain proteins, GGA proteins, STAM proteins and Hrs is well-established and is evolutionarily conserved from yeast to humans. Recent studies suggest that Tom1, Tom1L1 and Tom1L2 subfamily of VHS domain proteins, which do not exist in yeast, are emerging as novel regulators for post-Golgi trafficking and signaling.

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