title: Crystallization and preliminary X-ray crystallographic analysis of yeast arginyl-tRNA synthetase-yeast tRNAArg complexes.
abstract: Three different crystal forms of complexes between arginyl-tRNA synthetase from the yeast Saccharomyces cerevisae (yArgRS) and the yeast second major tRNA(Arg) (tRNA(Arg)(ICG)) isoacceptor have been crystallized by the hanging-drop vapour-diffusion method in the presence of ammonium sulfate. Crystal form II, which diffracts beyond 2.2 A resolution at the European Synchrotron Radiation Facility ID14-4 beamline, belongs to the orthorhombic space group P2(1)2(1)2, with unit-cell parameters a = 129.64, b = 107.47, c = 71. 38 A. This crystal form presents the highest resolution obtained for an active form of an aminoacyl-tRNA synthetase-tRNA complex. The estimated V(m) of 2.6 A(3) Da(-1) indicates one molecule of complex in the asymmetric unit. The three crystal forms were solved by the molecular-replacement method using the coordinates of the free yArgRS.
authors.affiliation: UPR 9004 Biologie Structurale, Institut de Génétique et de Biologie Moléculaire et Cellulaire, CNRS/INSERM/ULP, BP 163, 67404 Illkirch CEDEX, France.
authors.forename: B
authors.initials: B
authors.lastname: Delagoutte
authors.forename: G
authors.initials: G
authors.lastname: Keith
authors.forename: D
authors.initials: D
authors.lastname: Moras
authors.forename: J
authors.initials: J
authors.lastname: Cavarelli
mesh_terms: D001126:Arginine-tRNA Ligase / Q000737:chemistry* / Q000302:isolation & purification / Q000378:metabolism*; D003460:Crystallization; D018360:Crystallography, X-Ray; D012331:RNA, Fungal / Q000737:chemistry / Q000302:isolation & purification / Q000378:metabolism; D012347:RNA, Transfer, Arg / Q000737:chemistry* / Q000302:isolation & purification / Q000378:metabolism*; D012441:Saccharomyces cerevisiae / Q000201:enzymology / Q000235:genetics
chemical_list: D012331:RNA, Fungal; D012347:RNA, Transfer, Arg; D001126:Arginine-tRNA Ligase