Work

Sorting Nexin 17 Accelerates Internalization Yet Retards Degradation of P-selectin

Year: 2004

Type: article

Abstract: The transient appearance of P-selectin on the surface of endothelial cells helps recruit leukocytes into sites of inflammation. The tight control of cell surface P-selectin on these cells depends on regulated exocytosis of Weibel-Palade bodies where the protein is stored and on its rapid endocytosis. After endocytosis, P-selectin is either sorted via endosomes and the Golgi apparatus for storage in Weibel-Palade bodies or targeted to lysosomes for degradation. A potential player in this complex endocytic itinerary is SNX17, a member of the sorting nexin family, which has been shown in a yeast two-hybrid assay to bind P-selectin. Here, we show that overexpression of SNX17 in mammalian cells can influence two key steps in the endocytic trafficking of P-selectin. First, it promotes the endocytosis of P-selectin from the plasma membrane. Second, it inhibits the movement of P-selectin into lysosomes, thereby reducing its degradation.

Source: Molecular Biology of the Cell

DOI: 10.1091/mbc.e04-02-0143

Authors: Ross Williams, Thomas Schlüter, Marnie S. Roberts, Peter Knauth, Ralf Bohnensack, Daniel F. Cutler

Institutions: MRC Laboratory for Molecular Cell Biology, University College London, Otto-von-Guericke-Universität Magdeburg

Language: English

Topic: Cellular transport and secretion

Subfield: Cell Biology

Field: Biochemistry, Genetics and Molecular Biology

Domain: Life Sciences

SDG: Good health and well-being

Open Access status: green

Funder: Medical Research Council