title: Purification, crystallisation and preliminary X-ray analysis of penicillin binding protein 4 from Escherichia coli, a protein related to class A beta-lactamases.
abstract: Crystals of the penicillin binding protein 4 (PBP4) from Escherichia coli have been obtained at 37 degrees C from liquid to liquid diffusion experiments in capillaries. PBP4 was dissolved in a 1.0 M ammonium sulphate solution, buffered at pH 7.2, to a concentration of 5 mg/ml, and was layered on top of a 1.6 to 2.2 M ammonium sulphate solution. Crystals appeared within four to six weeks. They belong to space group C222 with cell dimensions a = 68.5 A, b = 100.5 A and c = 137.0 A, and diffract to at least 2.8 A resolution. There is one molecule with a molecule mass of 49,568 Da in the asymmetric unit.
authors.affiliation: Department of Chemistry, University of Groningen, The Netherlands.
authors.forename: M M
authors.initials: MM
authors.lastname: Thunnissen
authors.forename: F
authors.initials: F
authors.lastname: Fusetti
authors.forename: B
authors.initials: B
authors.lastname: de Boer
authors.forename: B W
authors.initials: BW
authors.lastname: Dijkstra
mesh_terms: D000595:Amino Acid Sequence; D001426:Bacterial Proteins; D002352:Carrier Proteins / Q000737:chemistry*; D003460:Crystallization; D018360:Crystallography, X-Ray; D004926:Escherichia coli / Q000737:chemistry*; D029968:Escherichia coli Proteins; D006602:Hexosyltransferases; D008969:Molecular Sequence Data; D002267:Muramoylpentapeptide Carboxypeptidase / Q000737:chemistry*; D046915:Penicillin-Binding Proteins; D010406:Penicillins / Q000378:metabolism*; D010458:Peptidyl Transferases; D017386:Sequence Homology, Amino Acid; D046929:Serine-Type D-Ala-D-Ala Carboxypeptidase; D001618:beta-Lactamases / Q000737:chemistry
chemical_list: D001426:Bacterial Proteins; D002352:Carrier Proteins; D029968:Escherichia coli Proteins; D046915:Penicillin-Binding Proteins; D010406:Penicillins; D010458:Peptidyl Transferases; D006602:Hexosyltransferases; D046929:Serine-Type D-Ala-D-Ala Carboxypeptidase; C478706:penicillin-binding protein 4, E coli; D002267:Muramoylpentapeptide Carboxypeptidase; D001618:beta-Lactamases