J. Biol. Chem., Vol. 261, Issue 20, 9094-9097, Jul, 1986
Identification of the interleukin-3 receptor using an iodinatable, cleavable, photoreactive cross-linking agent
P Sorensen, NM Farber and G Krystal
Murine interleukin-3 (mIL-3) is a lymphokine that stimulates the
proliferation and differentiation of both pluripotent hemopoietic stem
cells and their committed progeny. However, very little is known about the
mechanism by which this growth factor elicits its effects on responsive
cell populations. To gain insight into early events following mIL-3
receptor interaction, we initiated studies to isolate the receptor and
study its properties. In this report, we demonstrate the use of a new
iodinatable, cleavable, photoreactive cross-linking agent,
sulfosuccinimidyl 2-(p-azidosalicylamido)-1,3'-dithiopropionate to identify
the mIL-3 receptor. These studies reveal the mIL-3 receptor to be a single
polypeptide chain with a molecular weight of 67 kDa and an isoelectric
point of approximately 6.2.