Heparin Binding Epidermal Growth Factor Like Growth Factor (HBEGF)
HB-EGF; DTR; DTS; DTSF; HEGFL; Diphtheria Toxin Receptor
Diphtheria toxin inhibits protein synthesis in eukaryotic cells by catalyzing inactivation of elongation factor-2 (EF2). Entry of toxin into cells is dependent on binding to the cell surface.
Mice and rats are resistant to diphtheria toxin, and the resistance extends to cultured cells. Mouse-human hybrid cells are sensitive to diphtheria toxin. Creagan et al. (1975) showed that sensitivity is determined by human chromosome 5, which presumably carries a gene for a receptor for toxin.