title: Crystallization and preliminary X-ray diffraction analysis of the arginine repressor of the hyperthermophile Thermotoga neapolitana.
abstract: The arginine repressor of Thermotoga neapolitana (ArgRTnp) is a member of the family of multifunctional bacterial arginine repressors involved in the regulation of arginine metabolism. This hyperthermophilic repressor shows unique DNA-binding features that distinguish it from its homologues. ArgRTnp exists as a homotrimeric protein that assembles into hexamers at higher protein concentrations and/or in the presence of arginine. ArgRTnp was crystallized with and without its corepressor arginine using the hanging-drop vapour-diffusion method. Crystals of the aporepressor diffracted to a resolution of 2.1 A and belong to the orthorhombic P2(1)2(1)2(1) space group, with unit-cell parameters a = 117.73, b = 134.15, c = 139.31 A. Crystals of the repressor in the presence of its corepressor arginine diffracted to a resolution of 2.4 A and belong to the same space group, with similar unit-cell parameters.
authors.affiliation: Laboratorium voor Erfelijkheidsleer en Microbiologie, Vrije Universiteit Brussel, Pleinlaan 2, B-1050 Brussels, Belgium. jan.massant@vub.ac.be
authors.forename: Jan
authors.initials: J
authors.lastname: Massant
authors.forename: Eveline
authors.initials: E
authors.lastname: Peeters
authors.forename: Daniel
authors.initials: D
authors.lastname: Charlier
authors.forename: Dominique
authors.initials: D
authors.lastname: Maes
mesh_terms: D001120:Arginine / Q000737:chemistry / Q000378:metabolism; D001426:Bacterial Proteins / Q000737:chemistry* / Q000235:genetics / Q000302:isolation & purification / Q000502:physiology; D003460:Crystallization; D018360:Crystallography, X-Ray; D004269:DNA, Bacterial / Q000737:chemistry; D004268:DNA-Binding Proteins / Q000737:chemistry; D012097:Repressor Proteins / Q000737:chemistry* / Q000235:genetics / Q000302:isolation & purification / Q000502:physiology; D046949:Thermotoga neapolitana / Q000737:chemistry* / Q000235:genetics
chemical_list: C087018:ArgR protein, Bacteria; D001426:Bacterial Proteins; D004269:DNA, Bacterial; D004268:DNA-Binding Proteins; D012097:Repressor Proteins; D001120:Arginine