2z6m

Crystal structure of Human Ferritin H8 as biotemplate for noble metal nanoparticle synthesis

spinqualitylabelsall models 2z6m, resolution 2.72Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 2z6m is a 12 chain structure with sequence from Human. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: CA, MPD, ZN Related: 2fha Activity: Ferroxidase, with EC number 1.16.3.1 Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function [FRIH_HUMAN] Stores iron in a soluble, non-toxic, readily available form. Important for iron homeostasis. Has ferroxidase activity. Iron is taken up in the ferrous form and deposited as ferric hydroxides after oxidation. Also plays a role in delivery of iron to cells. Mediates iron uptake in capsule cells of the developing kidney (By similarity). 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 Human H ferritin (HuHF) assembles from 24 four-helix bundles to form an approximately 500 kDa protein with an 8 nm internal cavity. HuHF provides a useful model for studying the transport of metal ions in solution to buried reaction sites in proteins. In this study, HuHF was redesigned to facilitate noble metal ion (Au(3+), Ag(+)) binding, reduction, and nanoparticle formation within the cavity. Computationally determined amino acid substitutions were targeted at four external and four internal surface sites. A variant with a total of 96 cysteines and histidines removed from the exterior surface and 96 non-native cysteines added to the interior surface retained wild-type stability and structure, as confirmed by X-ray crystallography, and promoted the formation of silver or gold nanoparticles within the protein cavity. Crystallographic studies with HuHF variants provide insight into how ferritins control access of metal ions to interior residues that perform chemistry. Directing noble metal ion chemistry within a designed ferritin protein.,Butts CA, Swift J, Kang SG, Di Costanzo L, Christianson DW, Saven JG, Dmochowski IJ Biochemistry. 2008 Dec 2;47(48):12729-39. PMID:18991401 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Ferritin 3D structures

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