Subcloning, crystallization and preliminary X-ray analysis of the signal receiver domain of ETR1, an ethylene receptor fromArabidopsis thaliana

The signal receiver domain of ETR1, an ethylene receptor from Arabidopsis thaliana, has been subcloned and expressed in E. coli and purified by affinity chromatography. Crystals of both native and a selenomethionine-substituted form of the receiver domain have been obtained. Native crystals grew in 1.6 M Li2SO4 and 0.1 M HEPES pH 7.5 and once flash-frozen diffract to 2.1 Å resolution. They belong to space group P41212 with unit-cell dimensions a = b = 48.4, c = 112.3 Å.