title: Crystallization and preliminary X-ray diffraction studies on the N-utilizing substance-B (NusB) from Mycobacterium tuberculosis.
abstract: N-utilizing substance B (NusB) is a protein which forms part of a complex assembly in transcriptional antitermination in Mycobacterium tuberculosis. It forms a heterodimer with the product of the NusE gene (identical to the ribosomal protein S10) and mediates the process of transcriptional antitermination by forming the core complex with the nut site of the ribosomal RNA along with other protein factors. NusB has been cloned and overexpressed in Escherichia coli and crystallized using the hanging-drop vapour-diffusion method. The space group is P2(1)2(1)2(1), with unit-cell parameters a = 46.6, b = 64.2, c = 90.1 A. A native data set complete to 1.6 A resolution has been collected from a single crystal.
authors.affiliation: Division of Protein Structure, The National Institute for Medical Research, The Ridgeway, Mill Hill, London NW7 1AA, England.
authors.forename: B
authors.initials: B
authors.lastname: Gopal
authors.forename: R A
authors.initials: RA
authors.lastname: Cox
authors.forename: M J
authors.initials: MJ
authors.lastname: Colston
authors.forename: G G
authors.initials: GG
authors.lastname: Dodson
authors.forename: S J
authors.initials: SJ
authors.lastname: Smerdon
authors.forename: L F
authors.initials: LF
authors.lastname: Haire
mesh_terms: D000595:Amino Acid Sequence; D001426:Bacterial Proteins / Q000737:chemistry* / Q000235:genetics / Q000302:isolation & purification*; D001483:Base Sequence; D003460:Crystallization; D018360:Crystallography, X-Ray; D017931:DNA Primers / Q000235:genetics; D004926:Escherichia coli / Q000235:genetics; D029968:Escherichia coli Proteins; D008969:Molecular Sequence Data; D009169:Mycobacterium tuberculosis / Q000737:chemistry* / Q000235:genetics; D011994:Recombinant Proteins / Q000737:chemistry / Q000235:genetics / Q000302:isolation & purification; D017386:Sequence Homology, Amino Acid; D014157:Transcription Factors / Q000737:chemistry* / Q000235:genetics / Q000302:isolation & purification*
chemical_list: D001426:Bacterial Proteins; D017931:DNA Primers; D029968:Escherichia coli Proteins; C074952:NusB protein, E coli; D011994:Recombinant Proteins; D014157:Transcription Factors