Search Results - "BRITT, R. David"
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Trapping a cross-linked lysine–tryptophan radical in the catalytic cycle of the radical SAM enzyme SuiB
Published in Proceedings of the National Academy of Sciences - PNAS (25-05-2021)“…The radical S-adenosylmethionine (rSAM) enzyme SuiB catalyzes the formation of an unusual carbon–carbon bond between the sidechains of lysine (Lys) and…”
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Serine is the molecular source of the NH(CH 2 ) 2 bridgehead moiety of the in vitro assembled [FeFe] hydrogenase H-cluster
Published in Chemical science (Cambridge) (2020)“…The active site of [FeFe] hydrogenase, the H-cluster, consists of a canonical [4Fe–4S] H subcluster linked to a unique binuclear [2Fe] H subcluster containing…”
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3
Isolation of a triplet benzene dianion
Published in Nature chemistry (01-10-2021)“…Baird’s rule predicts that molecules with 4 n π electrons should be aromatic in the triplet state, but the realization of simple ring systems with such an…”
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Bioassembly of complex iron–sulfur enzymes: hydrogenases and nitrogenases
Published in Nature reviews. Chemistry (01-10-2020)“…Nature uses multinuclear metal clusters to catalyse a number of important multielectron redox reactions. Examples that employ complex Fe–S clusters in…”
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Mn(II) Oxidation by the Multicopper Oxidase Complex Mnx: A Coordinated Two-Stage Mn(II)/(III) and Mn(III)/(IV) Mechanism
Published in Journal of the American Chemical Society (23-08-2017)“…The bacterial manganese oxidase MnxG of the Mnx protein complex is unique among multicopper oxidases (MCOs) in carrying out a two-electron metal oxidation,…”
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Ammonia Binds to the Dangler Manganese of the Photosystem II Oxygen-Evolving Complex
Published in Journal of the American Chemical Society (15-07-2015)“…High-resolution X-ray structures of photosystem II reveal several potential substrate binding sites at the water-oxidizing/oxygen-evolving 4MnCa cluster…”
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Synthetic model of the asymmetric [Mn₃CaO₄] cubane core of the oxygen-evolving complex of photosystem II
Published in Proceedings of the National Academy of Sciences - PNAS (14-02-2012)“…The laboratory synthesis of the oxygen-evolving complex (OEC) of photosystem II has been the objective of synthetic chemists since the early 1970s. However,…”
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Structural Effects of Ammonia Binding to the Mn4CaO5 Cluster of Photosystem II
Published in The journal of physical chemistry. B (08-02-2018)“…The Mn4CaO5 oxygen-evolving complex (OEC) of photosystem II catalyzes the light-driven oxidation of two substrate waters to molecular oxygen. ELDOR-detected…”
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Identity and function of an essential nitrogen ligand of the nitrogenase cofactor biosynthesis protein NifB
Published in Nature communications (09-04-2020)“…NifB is a radical S -adenosyl-L-methionine (SAM) enzyme that is essential for nitrogenase cofactor assembly. Previously, a nitrogen ligand was shown to be…”
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Reactive high-spin iron(IV)-oxo sites through dioxygen activation in a metal–organic framework
Published in Science (American Association for the Advancement of Science) (03-11-2023)“…In nature, nonheme iron enzymes use dioxygen to generate high-spin iron(IV)=O species for a variety of oxygenation reactions. Although synthetic chemists have…”
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A protein fold switch joins the circadian oscillator to clock output in cyanobacteria
Published in Science (American Association for the Advancement of Science) (17-07-2015)“…Organisms are adapted to the relentless cycles of day and night, because they evolved timekeeping systems called circadian clocks, which regulate biological…”
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Electrochemical Reduction of N2 to NH3 at Low Potential by a Molecular Aluminum Complex
Published in Chemistry : a European journal (07-01-2019)“…Electrochemical generation of ammonia (NH3) from nitrogen (N2) using renewable electricity is a desirable alternative to current NH3 production methods, which…”
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Pulse EPR Spectroscopic Characterization of the S3 State of the Oxygen-Evolving Complex of Photosystem II Isolated from Synechocystis
Published in Biochemistry (Easton) (29-12-2020)“…The S3 state is the last semi-stable state in the water splitting reaction that is catalyzed by the Mn4O5Ca cluster that makes up the oxygen-evolving complex…”
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Electronic Structure Description of a [Co(III)3Co(IV)O4] Cluster: A Model for the Paramagnetic Intermediate in Cobalt-Catalyzed Water Oxidation
Published in Journal of the American Chemical Society (05-10-2011)“…Multifrequency electron paramagnetic resonace (EPR) spectroscopy and electronic structure calculations were performed on [Co4O4(C5H5N)4(CH3CO2)4]+ (1 + ), a…”
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A Night-Time Edge Site Intermediate in the Cyanobacterial Circadian Clock Identified by EPR Spectroscopy
Published in Journal of the American Chemical Society (12-01-2022)“…As the only circadian oscillator that can be reconstituted in vitro with its constituent proteins KaiA, KaiB, and KaiC using ATP as an energy source, the…”
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Menaquinone Biosynthesis: New Strategies to Trap Radical Intermediates in the MqnE-Catalyzed Reaction
Published in Biochemistry (Easton) (01-06-2021)“…Aminofutalosine synthase (MqnE) is a radical SAM enzyme that catalyzes the conversion of 3-((1-carboxyvinyl)oxy)benzoic acid to aminofutalosine during the…”
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A Radical Intermediate in Tyrosine Scission to the CO and CN⁻ Ligands of FeFe Hydrogenase
Published in Science (American Association for the Advancement of Science) (25-10-2013)“…The radical S-adenosylmethionine (SAM) enzyme HydG lyses free L-tyrosine to produce CO and CN⁻ for the assembly of the catalytic H cluster of FeFe hydrogenase…”
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Mn(II) Oxidation by the Multicopper Oxidase Complex Mnx: A Binuclear Activation Mechanism
Published in Journal of the American Chemical Society (23-08-2017)“…The bacterial protein complex Mnx contains a multicopper oxidase (MCO) MnxG that, unusually, catalyzes the two-electron oxidation of Mn(II) to MnO2…”
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A High-Spin Iron(IV)–Oxo Complex Supported by a Trigonal Nonheme Pyrrolide Platform
Published in Journal of the American Chemical Society (25-01-2012)“…We report the generation and characterization of a new high-spin iron(IV)–oxo complex supported by a trigonal nonheme pyrrolide platform. Oxygen-atom transfer…”
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Probing the coordination and function of Fe4S4 modules in nitrogenase assembly protein NifB
Published in Nature communications (19-07-2018)“…NifB is an essential radical S -adenosylmethionine (SAM) enzyme for nitrogenase cofactor assembly. Previous studies show that NifB couples a putative pair of…”
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