3lnn

Crystal structure of ZneB from Cupriavidus metallidurans

spinqualitylabelsall models 3lnn, resolution 2.80Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 3lnn is a 2 chain structure with sequence from Cupmc. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: ZN Gene: Rmet_5330, ZneB (CUPMC) 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 Resistance nodulation cell division (RND)-based efflux complexes mediate multidrug and heavy-metal resistance in many Gram-negative bacteria. Efflux of toxic compounds is driven by membrane proton/substrate antiporters (RND protein) in the plasma membrane, linked by a membrane fusion protein (MFP) to an outer-membrane protein. The three-component complex forms an efflux system that spans the entire cell envelope. The MFP is required for the assembly of this complex and is proposed to play an important active role in substrate efflux. To better understand the role of MFPs in RND-driven efflux systems, we chose ZneB, the MFP component of the ZneCAB heavy-metal efflux system from Cupriavidus metallidurans CH34. ZneB is shown to be highly specific for Zn(2+) alone. The crystal structure of ZneB to 2.8 A resolution defines the basis for metal ion binding in the coordination site at a flexible interface between the beta-barrel and membrane proximal domains. The conformational differences observed between the crystal structures of metal-bound and apo forms are monitored in solution by spectroscopy and chromatography. The structural rearrangements between the two states suggest an active role in substrate efflux through metal binding and release. Metal-induced conformational changes in ZneB suggest an active role of membrane fusion proteins in efflux resistance systems.,De Angelis F, Lee JK, O'Connell JD 3rd, Miercke LJ, Verschueren KH, Srinivasan V, Bauvois C, Govaerts C, Robbins RA, Ruysschaert JM, Stroud RM, Vandenbussche G Proc Natl Acad Sci U S A. 2010 Jun 15;107(24):11038-43. Epub 2010 Jun 1. PMID:20534468 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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