3eix | pdb_00003eix

Crystal structure of selenomethionine labelled Staphylococcus aureus lipoprotein, HtsA

spinqualitylabelsall models 3eix, resolution 1.35Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 3eix is a 1 chain structure with sequence from Staan. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: CL NonStd Res: MSE Related: 3eiw Gene: htsA (STAAN) Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT 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 Iron is critical for virtually all forms of life. The production of high-affinity iron chelators, siderophores, and the subsequent uptake of iron-siderophore complexes are a common strategy employed by microorganisms to acquire iron. Staphylococcus aureus produces siderophores but genetic information underlying their synthesis and transport is limited. Previous work implicated the sbn operon in siderophore synthesis and the sirABC operon in uptake. Here we characterize a second siderophore biosynthetic locus in S. aureus; the locus consists of four genes (in strain Newman these open reading frames are designated NWMN_2079-2082) which, together, are responsible for the synthesis and export of staphyloferrin A, a polycarboxylate siderophore. While deletion of the NWMN_2079-2082 locus did not affect iron-restricted growth of S. aureus, strains bearing combined sbn and NWMN_2079-2082 locus deletions produced no detectable siderophore and demonstrated severely attenuated iron-restricted growth. Adjacent to NWMN_2079-2082 resides the htsABC operon, encoding an ABC transporter previously implicated in haem acquisition. We provide evidence here that HtsABC, along with the FhuC ATPase, is required for the uptake of staphyloferrin A. The crystal structure of apo-HtsA was determined and identified a large positively charged region in the substrate-binding pocket, in agreement with a role in binding of anionic staphyloferrin A. Characterization of staphyloferrin A biosynthetic and transport mutants in Staphylococcus aureus.,Beasley FC, Vines ED, Grigg JC, Zheng Q, Liu S, Lajoie GA, Murphy ME, Heinrichs DE Mol Microbiol. 2009 May;72(4):947-63. Epub 2009 Apr 14. PMID:19400778 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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