2exw

Crystal structure of a EcClC-Fab complex in the absence of bound ions

spinqualitylabelsall models 2exw, resolution 3.20Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 2exw is a 6 chain structure with sequence from "bacillus_coli"_migula_1895 "bacillus coli" migula 1895 and Mus musculus. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Related: 1ots, 2exy, 2ez0 Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function [CLCA_ECOLI] Proton-coupled chloride transporter. Functions as antiport system and exchanges two chloride ions for 1 proton. Probably acts as an electrical shunt for an outwardly-directed proton pump that is linked to amino acid decarboxylation, as part of the extreme acid resistance (XAR) response. 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 ClC channels are members of a large protein family of chloride (Cl-) channels and secondary active Cl- transporters. Despite their diverse functions, the transmembrane architecture within the family is conserved. Here we present a crystallographic study on the ion-binding properties of the ClC selectivity filter in the close homolog from Escherichia coli (EcClC). The ClC selectivity filter contains three ion-binding sites that bridge the extra- and intracellular solutions. The sites bind Cl- ions with mM affinity. Despite their close proximity within the filter, the three sites can be occupied simultaneously. The ion-binding properties are found conserved from the bacterial transporter EcClC to the human Cl- channel ClC-1, suggesting a close functional link between ion permeation in the channels and active transport in the transporters. In resemblance to K+ channels, ions permeate the ClC channel in a single file, with mutual repulsion between the ions fostering rapid conduction. Ion-binding properties of the ClC chloride selectivity filter.,Lobet S, Dutzler R EMBO J. 2006 Jan 11;25(1):24-33. Epub 2005 Dec 8. PMID:16341087 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Monoclonal Antibodies 3D structures

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