Search Results - "Biaso, Frédéric"
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Discovery of fungal oligosaccharide-oxidising flavo-enzymes with previously unknown substrates, redox-activity profiles and interplay with LPMOs
Published in Nature communications (09-04-2021)“…Oxidative plant cell-wall processing enzymes are of great importance in biology and biotechnology. Yet, our insight into the functional interplay amongst such…”
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Mutations in the coordination spheres of T1 Cu affect Cu2+-activation of the laccase from Thermus thermophilus
Published in Biochimie (01-03-2021)“…Thermus thermophilus laccase belongs to the sub-class of multicopper oxidases that is activated by the extra binding of copper to a methionine-rich domain…”
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Single-domain flavoenzymes trigger lytic polysaccharide monooxygenases for oxidative degradation of cellulose
Published in Scientific reports (17-06-2016)“…The enzymatic conversion of plant biomass has been recently revolutionized by the discovery of lytic polysaccharide monooxygenases (LPMOs) that carry out…”
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Spectroscopic and Structural Characterization of Reduced Desulfovibrio vulgaris Hildenborough W‑FdhAB Reveals Stable Metal Coordination during Catalysis
Published in ACS chemical biology (15-07-2022)“…Metal-dependent formate dehydrogenases are important enzymes due to their activity of CO2 reduction to formate. The tungsten-containing FdhAB formate…”
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Gating of Substrate Access and Long-Range Proton Transfer in Escherichia coli Nitrate Reductase A: The Essential Role of a Remote Glutamate Residue
Published in ACS catalysis (03-12-2021)“…The Mo/W-bisPGD enzyme superfamily comprises a vast number of mononuclear molybdenum and tungsten enzymes that catalyze a great diversity of vital reactions in…”
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Copper Complexes as Bioinspired Models for Lytic Polysaccharide Monooxygenases
Published in Inorganic chemistry (06-02-2017)“…We report here two copper complexes as first functional models for lytic polysaccharide monooxygenases, mononuclear copper-containing enzymes involved in…”
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Structural insights into the semiquinone form of human Cytochrome P450 reductase by DEER distance measurements between a native flavin and a spin labelled non-canonical amino acid
Published in Chemistry : a European journal (02-04-2024)“…The flavoprotein Cytochrome P450 reductase (CPR) is the unique electron pathway from NADPH to Cytochrome P450 (CYPs). The conformational dynamics of human CPR…”
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DFT Investigation of the Molybdenum Cofactor in Periplasmic Nitrate Reductases: Structure of the Mo(V) EPR-Active Species
Published in Inorganic chemistry (19-03-2012)“…The periplasmic nitrate reductase NAP belongs to the DMSO reductase family that regroups molybdoenzymes housing a bis-molybdopterin cofactor as the active…”
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9
Membrane-Bound Flavocytochrome MsrQ Is a Substrate of the Flavin Reductase Fre in Escherichia coli
Published in ACS chemical biology (19-11-2021)“…MsrPQ is a new type of methionine sulfoxide reductase (Msr) system found in bacteria. It is specifically involved in the repair of periplasmic methionine…”
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Tuning the redox properties of a [4Fe-4S] center to modulate the activity of Mo-bisPGD periplasmic nitrate reductase
Published in Biochimica et biophysica acta. Bioenergetics (01-05-2019)“…Molybdoenzymes are ubiquitous in living organisms and catalyze, for most of them, oxidation-reduction reactions using a large range of substrates. Periplasmic…”
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Structural evidence for a reaction intermediate mimic in the active site of a sulfite dehydrogenase
Published in Chemical communications (Cambridge, England) (25-08-2020)“…By combining X-ray crystallography, electron paramagnetic resonance techniques and density functional theory-based modelling, we provide evidence for a direct…”
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12
Substrate-dependent oxidative inactivation of a W-dependent formate dehydrogenase involving selenocysteine displacement
Published in Chemical science (Cambridge) (14-08-2024)“…Metal-dependent formate dehydrogenases are very promising targets for enzyme optimization and design of bio-inspired catalysts for CO reduction, towards…”
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13
Beyond the coupled distortion model: structural analysis of the single domain cupredoxin AcoP, a green mononuclear copper centre with original features
Published in Dalton transactions : an international journal of inorganic chemistry (23-01-2024)“…Cupredoxins are widely occurring copper-binding proteins with a typical Greek-key beta barrel fold. They are generally described as electron carriers that rely…”
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Spectroscopic characterization of a green copper site in a single-domain cupredoxin
Published in PloS one (16-06-2014)“…Cupredoxins are widespread copper-binding proteins, mainly involved in electron transfer pathways. They display a typical rigid greek key motif consisting of…”
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Detrimental effect of the 6 His C-terminal tag on YedY enzymatic activity and influence of the TAT signal sequence on YedY synthesis
Published in BMC biochemistry (01-11-2013)“…YedY, a molybdoenzyme belonging to the sulfite oxidase family, is found in most Gram-negative bacteria. It contains a twin-arginine signal sequence that is…”
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Impact of copper ligand mutations on a cupredoxin with a green copper center
Published in Biochimica et biophysica acta. Bioenergetics (01-05-2017)“…Mononuclear cupredoxins contain a type 1 copper center with a trigonal or tetragonal geometry usually maintained by four ligands, a cystein, two histidines and…”
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Elucidating the Structures of the Low- and High-pH Mo(V) Species in Respiratory Nitrate Reductase: A Combined EPR, 14,15N HYSCORE, and DFT Study
Published in Inorganic chemistry (17-04-2017)“…Respiratory nitrate reductases (Nars), members of the prokaryotic Mo/W-bis Pyranopterin Guanosine dinucleotide (Mo/W-bisPGD) enzyme superfamily, are key…”
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Reductive activation in periplasmic nitrate reductase involves chemical modifications of the Mo-cofactor beyond the first coordination sphere of the metal ion
Published in Biochimica et biophysica acta (01-02-2014)“…In Rhodobacter sphaeroides periplasmic nitrate reductase NapAB, the major Mo(V) form (the “high g” species) in air-purified samples is inactive and requires…”
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Probing the Menasemiquinone Binding Mode to Nitrate Reductase A by Selective 2H and 15N Labeling, HYSCORE Spectroscopy, and DFT Modeling
Published in Chemphyschem (06-10-2017)“…In vivo specific isotope labeling at the residue or substituent level is used to probe menasemiquinone (MSK) binding to the quinol oxidation site of…”
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New Trends in the Chemistry of Iron(III) Citrate Complexes: Correlations between X-ray Structures and Solution Species Probed by Electrospray Mass Spectrometry and Kinetics of Iron Uptake from Citrate by Iron Chelators
Published in Chemistry : a European journal (18-03-2005)“…Despite the crucial role of “iron(III) citrate systems” in the iron metabolism of living organisms (bacteria as well as plants or mammals), the coordination…”
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