Julea N. Butt
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Photocatalytic Biohybrid Vesicles Open
Semiartificial photosynthesis presents an attractive route to overcome limitations of natural photosynthesis for sustainable chemicals production. Synthetic materials are combined with biological molecules, forming biohybrid systems, that …
View article: Extracellular catalysis of environmental substrates by <i>Shewanella oneidensis</i><scp>MR</scp>‐1 occurs via active sites on the C‐terminal domains of <scp>MtrC</scp>
Extracellular catalysis of environmental substrates by <i>Shewanella oneidensis</i><span>MR</span>‐1 occurs via active sites on the C‐terminal domains of <span>MtrC</span> Open
The Gram‐negative Shewanellaceae family is well known for its ability to transfer catabolically derived electrons to extracellular terminal electron acceptors through electron conduits that permeate the outer membrane. The primary conduit …
View article: Semiartificial Photosynthetic Nanoreactors for H<sub>2</sub> Generation
Semiartificial Photosynthetic Nanoreactors for H<sub>2</sub> Generation Open
A relatively unexplored energy source in synthetic cells is transmembrane electron transport, which like proton and ion transport can be light driven. Here, synthetic cells, called nanoreactors, are engineered for compartmentalized, semiar…
View article: Tethered heme domains in a triheme cytochrome allow for increased electron transport distances
Tethered heme domains in a triheme cytochrome allow for increased electron transport distances Open
Decades of research describe myriad redox enzymes that contain cofactors arranged in tightly packed chains facilitating rapid and controlled intra‐protein electron transfer. Many such enzymes participate in extracellular electron transfer …
View article: Genetic Code Expansion in <i>Shewanella oneidensis</i> MR-1 Allows Site-Specific Incorporation of Bioorthogonal Functional Groups into a <i>c</i>-Type Cytochrome
Genetic Code Expansion in <i>Shewanella oneidensis</i> MR-1 Allows Site-Specific Incorporation of Bioorthogonal Functional Groups into a <i>c</i>-Type Cytochrome Open
Genetic code expansion has enabled cellular synthesis of proteins containing unique chemical functional groups to allow the understanding and modulation of biological systems and engineer new biotechnology. Here, we report the development …
View article: Do multiheme cytochromes containing close-packed heme groups have a band structure formed from the heme π and π∗ orbitals?
Do multiheme cytochromes containing close-packed heme groups have a band structure formed from the heme π and π∗ orbitals? Open
Multiheme cytochromes (MHCs) are bacterial electron-transfer proteins. We show from optical spectra and calculations that some of these cytochromes probably contain occupied and unoccupied bands formed from heme π and π* orbitals that span…
Engineering of bespoke photosensitiser–microbe interfaces for enhanced semi-artificial photosynthesis Open
To maximise performance and scalability of biohybrid systems for solar fuel generation, we emphasise the need for rational design of the biotic–abiotic interface, taking into consideration two important aspects: attachment and electron tra…
Shallow conductance decay along the <i>heme</i> array of a single tetraheme protein wire Open
Small tetraheme cytochromes (STCs) support efficient electron tunnelling suggesting tunnelling-assisted long-range charge transport in large multiheme structures.
View article: Rational Design of Covalent Multiheme Cytochrome‐Carbon Dot Biohybrids for Photoinduced Electron Transfer
Rational Design of Covalent Multiheme Cytochrome‐Carbon Dot Biohybrids for Photoinduced Electron Transfer Open
Biohybrid systems can combine inorganic light‐harvesting materials and whole‐cell biocatalysts to utilize solar energy for the production of chemicals and fuels. Whole‐cell biocatalysts have an intrinsic self‐repair ability and are able to…
View article: A Cysteine Pair Controls Flavin Reduction by Extracellular Cytochromes during Anoxic/Oxic Environmental Transitions
A Cysteine Pair Controls Flavin Reduction by Extracellular Cytochromes during Anoxic/Oxic Environmental Transitions Open
Bacteria that live at the oxic/anoxic interface have to rapidly adapt to changes in oxygen levels within their environment. The facultative anaerobe Shewanella oneidensis MR-1 can use EET to respire in the absence of oxygen, but on exposur…
View article: Liquid-Chromatography Mass Spectrometry Describes Post-Translational Modification of <i>Shewanella</i> Outer Membrane Proteins
Liquid-Chromatography Mass Spectrometry Describes Post-Translational Modification of <i>Shewanella</i> Outer Membrane Proteins Open
LC-MS data for MtrCAB complexes from Shewanella oneidensis MR-1 and Shewanella baltica OS-185.LC-MS data for a soluble form of MtrC from Shewanella oneidensis MR-1 carrying a C-terminal Strep II tag.
View article: Size-dependent activity of carbon dots for photocatalytic H<sub>2</sub> generation in combination with a molecular Ni cocatalyst
Size-dependent activity of carbon dots for photocatalytic H<sub>2</sub> generation in combination with a molecular Ni cocatalyst Open
We demonstrate that purification and size separation of polydisperse carbon dot materials unveils the real active nanoparticles and enhances the photocatalytic H 2 evolution using monodisperse carbon dots.
View article: Reaction of Thiosulfate Dehydrogenase with a Substrate Mimic Induces Dissociation of the Cysteine Heme Ligand Giving Insights into the Mechanism of Oxidative Catalysis
Reaction of Thiosulfate Dehydrogenase with a Substrate Mimic Induces Dissociation of the Cysteine Heme Ligand Giving Insights into the Mechanism of Oxidative Catalysis Open
Thiosulfate dehydrogenases are bacterial cytochromes that contribute to the oxidation of inorganic sulfur. The active sites of these enzymes contain low-spin c-type heme with Cys-/His axial ligation. However, the reduction potentials of th…
View article: Photocatalytic Removal of the Greenhouse Gas Nitrous Oxide by Liposomal Microreactors
Photocatalytic Removal of the Greenhouse Gas Nitrous Oxide by Liposomal Microreactors Open
Nitrous oxide (N 2 O) is a potent greenhouse and ozone‐reactive gas for which emissions are growing rapidly due to increasingly intensive agriculture. Synthetic catalysts for N 2 O decomposition typically contain precious metals and/or ope…
View article: Photocatalytic Removal of the Greenhouse Gas Nitrous Oxide by Liposomal Microreactors
Photocatalytic Removal of the Greenhouse Gas Nitrous Oxide by Liposomal Microreactors Open
Nitrous oxide (N 2 O) is a potent greenhouse and ozone‐reactive gas for which emissions are growing rapidly due to increasingly intensive agriculture. Synthetic catalysts for N 2 O decomposition typically contain precious metals and/or ope…
View article: Reaction of Thiosulfate Dehydrogenase with a Substrate Mimic Induces Dissociation of the Cysteine Heme Ligand Giving Insight into the Mechanism of Oxidative Catalysis
Reaction of Thiosulfate Dehydrogenase with a Substrate Mimic Induces Dissociation of the Cysteine Heme Ligand Giving Insight into the Mechanism of Oxidative Catalysis Open
Data from Mass Spectrometry, Electronic Absorbance Spectroscopy, Magnetic Circular Dichroism (MCD) Spectroscopy and Protein Film Electrochemistry (PFE) in studies of the reaction between sulfite and the diheme thiosulfate dehydrogenase fro…
View article: Photocatalytic Removal of the Greenhouse Gas Nitrous Oxide by Liposomal Microreactors Piper et al
Photocatalytic Removal of the Greenhouse Gas Nitrous Oxide by Liposomal Microreactors Piper et al Open
Data from spectroscopy and gas chromatography with corresponding plots of analyte concentration with time. Data from dynamic light scattering and mass spectrometry (LC-MS)
View article: Baseline subtracted scattering curves of soluble MtrC and MtrC C453A in 20 mM HEPES, 50 mM NaCl, pH 7.5
Baseline subtracted scattering curves of soluble MtrC and MtrC C453A in 20 mM HEPES, 50 mM NaCl, pH 7.5 Open
SAXS scattering curves of solublised MtrC and Solublised MtrC C453A
View article: Nanosecond heme-to-heme electron transfer rates in a multiheme cytochrome nanowire reported by a spectrally unique His/Met-ligated heme
Nanosecond heme-to-heme electron transfer rates in a multiheme cytochrome nanowire reported by a spectrally unique His/Met-ligated heme Open
Significance Multiheme cytochromes have been identified as essential proteins for electron exchange between bacterial enzymes and redox substrates outside of the cell. In microbiology, these proteins contribute to efficient energy storage …
View article: Bespoke Biomolecular Wires for Transmembrane Electron Transfer: Spontaneous Assembly of a Functionalized Multiheme Electron Conduit
Bespoke Biomolecular Wires for Transmembrane Electron Transfer: Spontaneous Assembly of a Functionalized Multiheme Electron Conduit Open
Shewanella oneidensis exchanges electrons between cellular metabolism and external redox partners in a process that attracts much attention for production of green electricity (microbial fuel cells) and chemicals (microbial electrosynthesi…
The flavodoxin FldA activates the class Ia ribonucleotide reductase of <i>Campylobacter jejuni</i> Open
Campylobacter jejuni is a microaerophilic zoonotic pathogen with an atypical respiratory Complex I that oxidizes a flavodoxin (FldA) instead of NADH. FldA is essential for viability and is reduced via pyruvate and 2‐oxoglutarate oxidoreduc…
View article: Nanosecond heme-to-heme electron transfer rates in a multiheme cytochrome nanowire reported by a spectrally unique His/Met-ligated heme using pump-probe spectroscopy.
Nanosecond heme-to-heme electron transfer rates in a multiheme cytochrome nanowire reported by a spectrally unique His/Met-ligated heme using pump-probe spectroscopy. Open
Data from spectroscopic, electrochemical, voltammetric and computational studies as presented in van Wonderen et al 'Nanosecond heme-to-heme electron transfer rates in a multiheme cytochrome nanowire reported by a spectrally unique His/Met…
View article: Nanosecond heme-to-heme electron transfer rates in a multiheme cytochrome nanowire reported by a spectrally unique His/Met-ligated heme using pump-probe spectroscopy. van Wonderen et al
Nanosecond heme-to-heme electron transfer rates in a multiheme cytochrome nanowire reported by a spectrally unique His/Met-ligated heme using pump-probe spectroscopy. van Wonderen et al Open
Spectroscopic, electrochemical and voltammetric data desribing properties of photosensitized MtrC proteins. The data are presented as figures in van Wonderen et al 'Nanosecond heme-to-heme electron transfer rates in a spectrally unique His…
View article: Coherent Electron Transport across a 3 nm Bioelectronic Junction Made of Multi-Heme Proteins
Coherent Electron Transport across a 3 nm Bioelectronic Junction Made of Multi-Heme Proteins Open
Multi-heme cytochromes (MHCs) are fascinating proteins used by bacterial organisms to shuttle electrons within, between, and out of their cells. When placed in solid-state electronic junctions, MHCs support temperature-independent currents…
View article: Off-resonant coherent electron transport over three nanometers in multi-heme protein bioelectronic junctions
Off-resonant coherent electron transport over three nanometers in multi-heme protein bioelectronic junctions Open
Multi-heme cytochromes (MHC) are fascinating proteins used by bacterial organisms to shuttle electrons within and between their cells. When placed in a solid state electronic junction, they support temperature-independent currents over sev…
View article: His/Met heme ligation in the PioA outer membrane cytochrome enabling light-driven extracellular electron transfer by Rhodopseudomonas palustris TIE-1
His/Met heme ligation in the PioA outer membrane cytochrome enabling light-driven extracellular electron transfer by Rhodopseudomonas palustris TIE-1 Open
A growing number of bacterial species are known to move electrons across their cell envelopes. Naturally this occurs in support of energy conservation and carbon-fixation. For biotechnology it allows electron exchange between bacteria and …
The Crystal Structure of a Biological Insulated Transmembrane Molecular Wire Open
A growing number of bacteria are recognized to conduct electrons across their cell envelope, and yet molecular details of the mechanisms supporting this process remain unknown. Here, we report the atomic structure of an outer membrane span…
Quantum dot interactions with and toxicity to Shewanella oneidensis MR-1 Open
Combining abiotic photosensitisers such as quantum dots (QDs) with non-photosynthetic bacteria presents an intriguing concept into the design of artificial photosynthetic organisms and solar-driven fuel production. Shewanella oneidensis MR…