title: Expression, crystallization and preliminary X-ray analysis of the Pyrococcus abyssi protein homologue of Saccharomyces cerevisiae Nip7p.
abstract: Saccharomyces cerevisiae Nip7p is a nucleolar protein required for accurate processing of the 27S precursor of the 25S and 5.8S ribosomal RNAs. Nip7p homologues are found in eukaryotes and archaea. The Pyrococcus abyssi homologue of Nip7p (PaNip7) was cloned, expressed in Escherichia coli and purified for crystallization. X-ray diffraction data were collected from native crystals and an iodide derivative using synchrotron radiation. PaNip7 native crystals diffract to 1.8 A and belong to space group C2, with unit-cell parameters a = 88.49, b = 90.28, c = 63.35 A, beta = 134.29 degrees. The PaNip7 structure was solved using the SIRAS method.
authors.affiliation: Center for Structural Molecular Biology, Brazilian Synchrotron Light Laboratory, LNLS CP 6192, CEP 13084-971, Campinas SP, Brazil.
authors.forename: Patrícia Pereira
authors.initials: PP
authors.lastname: Coltri
authors.forename: Beatriz Gomes
authors.initials: BG
authors.lastname: Guimarães
authors.forename: Carla Columbano
authors.initials: CC
authors.lastname: Oliveira
authors.forename: Nilson IvoTonin
authors.initials: NI
authors.lastname: Zanchin
mesh_terms: D003001:Cloning, Molecular; D003460:Crystallization; D018360:Crystallography, X-Ray / Q000379:methods*; D004926:Escherichia coli / Q000378:metabolism; D043903:Pyrococcus abyssi / Q000378:metabolism*; D012269:Ribosomal Proteins / Q000737:chemistry* / Q000235:genetics; D012441:Saccharomyces cerevisiae / Q000378:metabolism*; D029701:Saccharomyces cerevisiae Proteins / Q000737:chemistry* / Q000235:genetics; D012984:Software
chemical_list: C107936:NIP7 protein, S cerevisiae; D012269:Ribosomal Proteins; D029701:Saccharomyces cerevisiae Proteins