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Florian, V. et al.

Florian, Schlüter, Bohnensack,

A new member of the sorting nexin family interacts with the C-terminus of P-selectin.

P-selectin is a cell adhesion molecule found in platelets and endothelial cells mediating binding of leukocytes. It is stored in secretory granules and expressed at the plasma membrane after cell activation. After rapid internalisation P-selectin recycles or is degraded. The 35 amino acid cytoplasmic domain of P-selectin contains signals for sorting into secretory granules, for endocytosis and for delivery to lysosomes. To investigate protein-protein interactions, we performed two-hybrid screening using the cytoplasmic domain of P-selectin as bait. KIAA0064 was identified as a putative intracellular P-selectin binding protein. Because the protein contains a phox homology (PX) domain in the N-terminus which is a characteristic feature of the sorting nexin (SNX) family, it was named SNX17. The PX domain is not required for binding of P-selectin in the two-hybrid system. Expression of a fusion protein between SNX17 and green fluorescent protein demonstrated localisation of SNX17 in the cytosol and to membranes.[1]

References

A new member of the sorting nexin family interacts with the C-terminus of P-selectin. Florian, V., Schlüter, T., Bohnensack, R. Biochem. Biophys. Res. Commun. (2001) [Pubmed]

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