2oze

The Crystal structure of Delta protein of pSM19035 from Streptoccocus pyogenes

spinqualitylabelsall models 2oze, resolution 1.83Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 2oze is a 1 chain structure with sequence from Streptococcus pyogenes. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 1.83Å Ligands: AGS, EPE, MG Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function Q57280_STRPY Evolutionary Conservation Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf. Publication Abstract from PubMed The accurate partitioning of Firmicute plasmid pSM19035 at cell division depends on ATP binding and hydrolysis by homodimeric ATPase delta(2) (ParA) and binding of omega(2) (ParB) to its cognate parS DNA. The 1.83 A resolution crystal structure of delta(2) in a complex with non-hydrolyzable ATPgammaS reveals a unique ParA dimer assembly that permits nucleotide exchange without requiring dissociation into monomers. In vitro, delta(2) had minimal ATPase activity in the absence of omega(2) and parS DNA. However, stoichiometric amounts of omega(2) and parS DNA stimulated the delta(2) ATPase activity and mediated plasmid pairing, whereas at high (4:1) omega(2) : delta(2) ratios, stimulation of the ATPase activity was reduced and delta(2) polymerized onto DNA. Stimulation of the delta(2) ATPase activity and its polymerization on DNA required ability of omega(2) to bind parS DNA and its N-terminus. In vivo experiments showed that delta(2) alone associated with the nucleoid, and in the presence of omega(2) and parS DNA, delta(2) oscillated between the nucleoid and the cell poles and formed spiral-like structures. Our studies indicate that the molar omega(2) : delta(2) ratio regulates the polymerization properties of (delta*ATP*Mg(2+))(2) on and depolymerization from parS DNA, thereby controlling the temporal and spatial segregation of pSM19035 before cell division. Streptococcus pyogenes pSM19035 requires dynamic assembly of ATP-bound ParA and ParB on parS DNA during plasmid segregation.,Pratto F, Cicek A, Weihofen WA, Lurz R, Saenger W, Alonso JC Nucleic Acids Res. 2008 Jun;36(11):3676-89. Epub 2008 May 13. PMID:18477635 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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