Purification, crystallization and preliminary data analysis of ligand–receptor complexes of growth and differentiation factor 5 (GDF5) and BMP receptor IB (BRIB)
August 19th, 2009 Posted by: admin
The ligand[ndash]receptor complex of GDF5 bound to its type I and type II receptors BRIB and ActRIIB was produced and crystallized. Crystals of the GDF5[ndash]BRIB complex could only be obtained if a ternary complex comprising GDF5, BRIB and the extracellular domain of the type II receptor ActRIIB was used in crystallization; however, the type II receptor ActRIIB was lost during crystallization. Crystals of this complex belonged to the tetragonal space group P42212, with unit-cell parameters a = b = 76.46, c = 82.78 Ã . Small changes in the crystallization condition resulted in crystals with a different morphology. These crystals consisted of the full ternary complex GDF5[ndash]BRIB[ndash]ActRIIB, but only diffracted to low resolu
