title: Crystallization and preliminary X-ray study of AMP nucleosidase.
abstract: Adenosine-5'-monophosphate nucleosidase from Escherichia coli has been crystallized in the presence of its strong competitive inhibitor formycin 5'-monophosphate and its allosteric activator adenosine 5'-triphosphate. Crystals are tetragonal bipyramids which grow to 1.2 mm in the longest dimension, are resistant to radiation damage, and diffract to a resolution of 3.5 A. The space group is P4(1)2(1)2 or P4(3)2(1)2, and the unit cell dimensions are a = 120.1 A and c = 243.7 A. The asymmetric unit is estimated to contain four subunits of 52,000 daltons. The crystals appear suitable for single crystal x-ray structure investigation.
mesh_terms: D003460:Crystallization; D004926:Escherichia coli / Q000201:enzymology*; D008970:Molecular Weight; D009699:N-Glycosyl Hydrolases / Q000302:isolation & purification*; D011487:Protein Conformation; D014961:X-Ray Diffraction
chemical_list: D009699:N-Glycosyl Hydrolases; C019699:AMP nucleosidase