8fum

AibH1H2 metalated with Fe in the presence of Tris

spinqualitylabelsall models 8fum, resolution 1.48Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 8fum is a 8 chain structure with sequence from Rhodococcus wratislaviensis NBRC 100605. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 1.48Å Ligands: CSO, FE, MG, PEG, PG4, TRS Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function A0A402C2V4_RHOWR Publication Abstract from PubMed The aerobic oxidation of carbon-hydrogen (C-H) bonds in biology is currently known to be accomplished by a limited set of cofactors that typically include heme, nonheme iron, and copper. While manganese cofactors perform difficult oxidation reactions, including water oxidation within Photosystem II, they are generally not known to be used for C-H bond activation, and those that do catalyze this important reaction display limited intrinsic reactivity. Here we report that the 2-aminoisobutyric acid hydroxylase from Rhodococcus wratislaviensis, AibH1H2, requires manganese to functionalize a strong, aliphatic C-H bond (BDE = 100 kcal/mol). Structural and spectroscopic studies of this enzyme reveal a redox-active, heterobimetallic manganese-iron active site at the locus of O(2) activation and substrate coordination. This result expands the known reactivity of biological manganese-iron cofactors, which was previously restricted to single-electron transfer or stoichiometric protein oxidation. Furthermore, the AibH1H2 cofactor is supported by a protein fold distinct from typical bimetallic oxygenases, and bioinformatic analyses identify related proteins abundant in microorganisms. This suggests that many uncharacterized monooxygenases may similarly require manganese to perform oxidative biochemical tasks. Enzymatic Hydroxylation of Aliphatic C-H Bonds by a Mn/Fe Cofactor.,Powell MM, Rao G, Britt RD, Rittle J J Am Chem Soc. 2023 Aug 2;145(30):16526-16537. doi: 10.1021/jacs.3c03419. Epub , 2023 Jul 20. PMID:37471626 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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