Rme-1 regulates the distribution and function of the endocytic recycling compartment in mammalian cells |
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Authors: | Lin S X Grant B Hirsh D Maxfield F R |
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Institution: | Department of Biochemistry, Weill Medical College of Cornell University, 1300 York Avenue, New York, New York 10021, USA. |
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Abstract: | RME-1 is an Eps15-homology (EH)-domain protein that was identified in a genetic screen for endocytosis genes in Caenorhabditis elegans. When expressed in a CHO cell line, the worm RME-1 protein and a mouse homologue are both associated with the endocytic recycling compartment. Here we show that expression of a dominant-negative construct with a point mutation near the EH domain results in redistribution of the endocytic recycling compartment and slowing down of transferrin receptor recycling. The delivery of a TGN38 chimaeric protein to the trans-Golgi network is also slowed down. The function of Rme-1 in endocytic recycling is evolutionarily conserved in metazoans as shown by the protein's properties in C. elegans. |
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