8avm | pdb_00008avm

Mutant of Superoxide Dismutase sodfm2 from Bacteroides fragilis

spinqualitylabelsall models 8avm, resolution 2.00Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 8avm is a 6 chain structure with sequence from Bacteroides fragilis. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: FE Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function SODF_BACFR Destroys superoxide anion radicals which are normally produced within the cells and which are toxic to biological systems. Publication Abstract from PubMed Evolution creates functional diversity of proteins, the essential building blocks of all biological systems. However, studies of natural proteins sampled across the tree of life and evaluated in a single experimental system are lacking. Almost half of enzymes require metals, and metalloproteins tend to optimally utilize the physicochemical properties of a specific metal co-factor. Life must adapt to changes in metal bioavailability, including those during the transition from anoxic to oxic Earth or pathogens' exposure to nutritional immunity. These changes can challenge the ability of metalloenzymes to maintain activity, presumptively driving their evolution. Here we studied metal-preference evolution within the natural diversity of the iron/manganese superoxide dismutase (SodFM) family of reactive oxygen species scavengers. We identified and experimentally verified residues with conserved roles in determining metal preference that, when combined with an understanding of the protein's evolutionary history, improved prediction of metal utilization across the five SodFM subfamilies defined herein. By combining phylogenetics, biochemistry and structural biology, we demonstrate that SodFM metal utilization can be evolutionarily fine tuned by sliding along a scale between perfect manganese and iron specificities. Over the history of life, SodFM metal preference has been modulated multiple independent times within different evolutionary and ecological contexts, and can be changed within short evolutionary timeframes. An ancient metalloenzyme evolves through metal preference modulation.,Sendra KM, Barwinska-Sendra A, Mackenzie ES, Basle A, Kehl-Fie TE, Waldron KJ Nat Ecol Evol. 2023 Apr 10. doi: 10.1038/s41559-023-02012-0. PMID:37037909 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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