Crystallization and X-ray crystallographic studies of an inhibitor from rye (Secale cereale) active against Acanthoscelides obtectus and Zabrotes subfasciatus alpha-amylases

Crystals of a new inhibitor present in rye seeds active against alpha-amylases from crop pests Acanthoscelides obtectus and Zabrotes subfasciatus have been obtained. A native dataset was collected at 2.21 A resolution with 99.3% completeness at CPr beamline at LNLS. The crystals belong to the trigonal system, space group P3(1)21 with a=b=78.21 A, and c=59.61 A. The crystal calculated solvent content is compatible with one dimer per asymmetric unit.