title: Expression, purification, crystallization and preliminary X-ray diffraction studies of recombinant class B non-specific acid phosphatase of Salmonella typhimurium.
abstract: The aphA gene of Salmonella enterica sv. Typhimurium strain MD6001 was cloned in the multicopy plasmid pBluescript SK(-). The recombinant AphA protein was purified to homogeneity. The protein crystallized in the orthorhombic space group P2(1)2(1)2(1), with unit-cell parameters a = 112.4, b = 130.2, c = 139.6 A. Consistent with the self-rotation function, there are two tetramers in the asymmetric unit, indicating a solvent content of approximately 54%. The crystals are composed of biologically active AphA molecules.
mesh_terms: D000135:Acid Phosphatase / Q000096:biosynthesis* / Q000737:chemistry* / Q000235:genetics; D000595:Amino Acid Sequence; D003460:Crystallization; D018360:Crystallography, X-Ray / Q000379:methods; D004926:Escherichia coli / Q000235:genetics / Q000378:metabolism; D008969:Molecular Sequence Data; D020836:Protein Structure, Quaternary; D011994:Recombinant Proteins / Q000096:biosynthesis / Q000737:chemistry / Q000235:genetics; D012486:Salmonella typhimurium / Q000201:enzymology* / Q000235:genetics; D020539:Sequence Analysis, Protein
chemical_list: D011994:Recombinant Proteins; D000135:Acid Phosphatase