title: Preliminary X-ray crystallographic studies and molecular symmetry of the PII regulatory protein from Escherichia coli.
abstract: The PII regulatory protein (tetramer, Mr = 44,000) plays an important role in the regulation of glutamine synthetase in enteric bacteria. The unmodified form (PIIA) of the PII protein from Escherichia coli has been crystallized in the cubic space group I23. The unit cell dimension is a = 88.8 (+/-0.1) A, with six molecules in the unit cell (i.e. 1 subunit/asymmetric unit). The molecule has symmetry 222.
mesh_terms: D001426:Bacterial Proteins; D004926:Escherichia coli / Q000032:analysis*; D005974:Glutamate-Ammonia Ligase / Q000378:metabolism; D008970:Molecular Weight; D051922:PII Nitrogen Regulatory Proteins; D014961:X-Ray Diffraction; D014965:X-Rays
chemical_list: D001426:Bacterial Proteins; D051922:PII Nitrogen Regulatory Proteins; C404143:PIID regulatory protein, Bacteria; D005974:Glutamate-Ammonia Ligase