5fjd

APO-CSP1 (COPPER STORAGE PROTEIN 1) FROM METHYLOSINUS TRICHOSPORIUM OB3B

spinqualitylabelsall models 5fjd, resolution 1.50Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 5fjd is a 4 chain structure with sequence from Methylosinus trichosporium ob3b. This structure supersedes the now removed PDB entry 5aje. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Related: 5fje Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Publication Abstract from PubMed Methane-oxidizing bacteria (methanotrophs) require large quantities of copper for the membrane-bound (particulate) methane monooxygenase. Certain methanotrophs are also able to switch to using the iron-containing soluble methane monooxygenase to catalyse methane oxidation, with this switchover regulated by copper. Methane monooxygenases are nature's primary biological mechanism for suppressing atmospheric levels of methane, a potent greenhouse gas. Furthermore, methanotrophs and methane monooxygenases have enormous potential in bioremediation and for biotransformations producing bulk and fine chemicals, and in bioenergy, particularly considering increased methane availability from renewable sources and hydraulic fracturing of shale rock. Here we discover and characterize a novel copper storage protein (Csp1) from the methanotroph Methylosinus trichosporium OB3b that is exported from the cytosol, and stores copper for particulate methane monooxygenase. Csp1 is a tetramer of four-helix bundles with each monomer binding up to 13 Cu(I) ions in a previously unseen manner via mainly Cys residues that point into the core of the bundle. Csp1 is the first example of a protein that stores a metal within an established protein-folding motif. This work provides a detailed insight into how methanotrophs accumulate copper for the oxidation of methane. Understanding this process is essential if the wide-ranging biotechnological applications of methanotrophs are to be realized. Cytosolic homologues of Csp1 are present in diverse bacteria, thus challenging the dogma that such organisms do not use copper in this location. A four-helix bundle stores copper for methane oxidation.,Vita N, Platsaki S, Basle A, Allen SJ, Paterson NG, Crombie AT, Murrell JC, Waldron KJ, Dennison C Nature. 2015 Sep 3;525(7567):140-3. doi: 10.1038/nature14854. Epub 2015 Aug 26. PMID:26308900 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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