title: Structure of Rv1848 (UreA), the Mycobacterium tuberculosis urease gamma subunit.
abstract: The crystal structure of the urease gamma subunit (UreA) from Mycobacterium tuberculosis, Rv1848, has been determined at 1.8 A resolution. The asymmetric unit contains three copies of Rv1848 arranged into a homotrimer that is similar to the UreA trimer in the structure of urease from Klebsiella aerogenes. Small-angle X-ray scattering experiments indicate that the Rv1848 protein also forms trimers in solution. The observed homotrimer and the organization of urease genes within the M. tuberculosis genome suggest that M. tuberculosis urease has the (alphabetagamma)(3) composition observed for other bacterial ureases. The gamma subunit may be of primary importance for the formation of the urease quaternary structure.
authors.affiliation: Physical Biosciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA.
authors.forename: Jeff E
authors.initials: JE
authors.lastname: Habel
authors.forename: Evan H
authors.initials: EH
authors.lastname: Bursey
authors.forename: Beom Seop
authors.initials: BS
authors.lastname: Rho
authors.forename: Chang Yub
authors.initials: CY
authors.lastname: Kim
authors.forename: Brent W
authors.initials: BW
authors.lastname: Segelke
authors.forename: Bernhard
authors.initials: B
authors.lastname: Rupp
authors.forename: Min S
authors.initials: MS
authors.lastname: Park
authors.forename: Thomas C
authors.initials: TC
authors.lastname: Terwilliger
authors.forename: Li Wei
authors.initials: LW
authors.lastname: Hung
mesh_terms: D000595:Amino Acid Sequence; D018360:Crystallography, X-Ray; D008958:Models, Molecular; D008969:Molecular Sequence Data; D009169:Mycobacterium tuberculosis / Q000201:enzymology*; D020836:Protein Structure, Quaternary; D017434:Protein Structure, Tertiary; D021122:Protein Subunits / Q000737:chemistry; D016415:Sequence Alignment; D017386:Sequence Homology, Amino Acid; D014510:Urease / Q000737:chemistry*
chemical_list: D021122:Protein Subunits; D014510:Urease