1eb0
From Proteopedia
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CRYSTAL STRUCTURE OF BACILLUS PASTEURII UREE AT 1.85 A, PHASED BY SIRAS. TYPE I CRYSTAL FORM.
Overview
Bacillus pasteurii UreE (BpUreE) is a putative chaperone assisting the, insertion of Ni(2+) ions in the active site of urease. The x-ray structure, of the protein has been determined for two crystal forms, at 1.7 and 1.85, A resolution, using SIRAS phases derived from a Hg(2+)-derivative. BpUreE, is composed of distinct N- and C-terminal domains, connected by a short, flexible linker. The structure reveals the topology of an elongated, homodimer, formed by interaction of the two C-terminal domains through, hydrophobic interactions. A single Zn(2+) ion bound to four conserved, His-100 residues, one from each monomer, connects two dimers resulting in, a tetrameric BpUreE known to be formed in concentrated solutions. The, Zn(2+) ion can be replaced by Ni(2+) as shown by anomalous difference maps, obtained on a crystal of BpUreE soaked in a solution containing NiCl(2). A, large hydrophobic patch surrounding the metal ion site is surface-exposed, in the biologically relevant dimer. The BpUreE structure represents the, first for this class of proteins and suggests a possible role for UreE in, the urease nickel-center assembly.
About this Structure
1EB0 is a Single protein structure of sequence from Sporosarcina pasteurii with ZN as ligand. Known structural/functional Site: . Full crystallographic information is available from OCA.
Reference
Structural basis for Ni(2+) transport and assembly of the urease active site by the metallochaperone UreE from Bacillus pasteurii., Remaut H, Safarov N, Ciurli S, Van Beeumen J, J Biol Chem. 2001 Dec 28;276(52):49365-70. Epub 2001 Oct 15. PMID:11602602
Page seeded by OCA on Tue Dec 18 15:08:38 2007
