4f2c

The Crystal Structure of a Human MitoNEET double mutant in which Gly 66 are Asp 67 are both Replaced with Ala Residues

spinqualitylabelsall models 4f2c, resolution 1.35Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 4f2c is a 2 chain structure with sequence from Homo sapiens. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 1.35Å Ligands: FES Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function CISD1_HUMAN Plays a key role in regulating maximal capacity for electron transport and oxidative phosphorylation (By similarity). May be involved in Fe-S cluster shuttling and/or in redox reactions. Publication Abstract from PubMed Metalloproteins (MPs) comprise one-third of all known protein structures. This diverse set of proteins contain a plethora of unique inorganic moieties capable of performing chemistry that would otherwise be impossible using only the amino acids found in nature. Most of the well-studied MPs are generally viewed as being very rigid in structure, and it is widely thought that the properties of the metal centers are primarily determined by the small fraction of amino acids that make up the local environment. Here we examine both theoretically and experimentally whether distal regions can influence the metal center in the diabetes drug target mitoNEET. We demonstrate that a loop (L2) 20 A away from the metal center exerts allosteric control over the cluster binding domain and regulates multiple properties of the metal center. Mutagenesis of L2 results in significant shifts in the redox potential of the [2Fe-2S] cluster and orders of magnitude effects on the rate of [2Fe-2S] cluster transfer to an apo-acceptor protein. These surprising effects occur in the absence of any structural changes. An examination of the native basin dynamics of the protein using all-atom simulations shows that twisting in L2 controls scissoring in the cluster binding domain and results in perturbations to one of the cluster-coordinating histidines. These allosteric effects are in agreement with previous folding simulations that predicted L2 could communicate with residues surrounding the metal center. Our findings suggest that long-range dynamical changes in the protein backbone can have a significant effect on the functional properties of MPs. Allosteric control in a metalloprotein dramatically alters function.,Baxter EL, Zuris JA, Wang C, Vo PL, Axelrod HL, Cohen AE, Paddock ML, Nechushtai R, Onuchic JN, Jennings PA Proc Natl Acad Sci U S A. 2013 Jan 15;110(3):948-53. doi:, 10.1073/pnas.1208286110. Epub 2012 Dec 27. PMID:23271805 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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