NCIt definition : Fractalkine (397 aa, 42 kDa) is encoded by the human CX3CL1 gene. This protein is
involved in chemotaxis of T-cells and monocytes.;
NCIt note : Unlike other known chemokines, fractalkine is a type 1 membrane protein with a signal
peptide, a chemokine domain, a stalk region containing 17 degenerate mucin-like repeats,
a transmembrane segment and a cytoplasmic domain. The extracellular domain of fractalkine
is released into the supernatants of transfected cells as a 95 kDa glycoprotein, possibly
by proteolysis at the dibasic cleavage site proximal to the membrane, to generate
soluble fractalkine.;