Results 71 to 80 of about 21,602 (293)

Cyanophenylalanine as an Infrared Probe for Iron–Sulfur Cluster Redox State in Multicenter Metalloenzymes

ChemBioChem, EarlyView.
The noncanonical amino acid, cyanophenylalanine, is genetically inserted close to iron–sulfur clusters of either spinach ferredoxin or iron–iron hydrogenase, and functions as an infrared spectroscopic reporter for changes in cluster redox state.
Zehui Duan, Jiaao Wei, Stephen B. Carr, Miguel Ramirez, Rhiannon M. Evans, Philip A. Ash, Patricia Rodriguez‐Macia, Amit Sachdeva, Kylie A. Vincent   +8 more
wiley   +1 more source

Electrochemical titrations and reaction time courses monitored in situ by magnetic circular dichroism spectroscopy [PDF]

, 2011
Magnetic circular dichroism (MCD) spectra, at ultraviolet–visible or near-infrared wavelengths (185–2000 nm), contain the same transitions observed in conventional absorbance spectroscopy, but their bisignate nature and more stringent selection rules ...
Abramson, Allen, Armstrong, Cheesman, Cheesman, Cheesman, Cheesman, Craft, Dooley, Duin, Farrar, Field, Fulop, Gadsby, Gamelin, Gates, George, Hadler, Horio, Hänzelmann, Johnson, Johnson, Johnson, Jones, Julea N. Butt, Justin M. Bradley, Kemp, Kobayashi, Koppenhofer, Larrabee, Male, Marritt, Marritt, Mitić, Mitou, Moir, Myles R. Cheesman, Paes de Sousa, Pauleta, Quintanar, Rasmussen, Richter, Rupnik, Simon, Solomon, Solomon, Solomon, Suharti, Thomson, Thomson, van Gelder, Vickery, Walters   +52 more
core   +1 more source

The Energetics of Electron Transfer in Redox‐DNA Layers Mimics That of Redox Proteins

Chemistry – A European Journal, EarlyView.
The electron transfer in ferrocene‐labeled DNA (Fc‐DNA) layers mimics that of redox proteins, featuring a low reorganization energy (λ). The origin of the low λ in Fc‐DNA was unveiled by high‐scan‐rate cyclic voltammetry and molecular dynamics simulations, implying Fc‐DNA as a versatile tool to open new avenues in understanding the ET in biological ...
Zhiyong Zheng, Simon Grall, Soo Hyeon Kim, Arnaud Chovin, Nicolas Clement, Christophe Demaille   +5 more
wiley   +1 more source

NMR of Paramagnetic Proteins: ¹³C Derived Paramagnetic Relaxation Enhancements Are an Additional Source of Structural Information in Solution

Magnetochemistry, 2023
In paramagnetic metalloproteins, longitudinal relaxation rates of 13C′ and 13Cα nuclei can be measured using 13C detected experiments and converted into electron spin-nuclear spin distance restraints, also known as Paramagnetic Relaxation Enhancement ...
Leonardo Querci, Inês B. Trindade, Michele Invernici, José Malanho Silva, Francesca Cantini, Ricardo O. Louro, Mario Piccioli   +6 more
doaj   +1 more source

Reactions of HNO with Metal Porphyrins: Underscoring the Biological Relevance of HNO [PDF]

, 2014
Azanone (1 HNO, nitroxyl) shows interesting yet poorly understood chemical and biological effects. HNO has some overlapping properties with nitric oxide (NO), sharing its biological reactivity toward heme proteins, thiols, and oxygen.
Bikiel, Damian Ezequiel, Doctorovich, Fabio, Marti, Marcelo Adrian, Pellegrino, Juan, Suarez, Sebastian   +4 more
core   +1 more source

The Role of Asparagine as a Gatekeeper Residue in the Selective Binding of Rare Earth Elements by Lanthanide‐Binding Peptides

Chemistry – A European Journal, EarlyView.
Lanthanide binding tags (LBTs) have been utilized as a green extractant to selectively separate rare earth elements (REEs). We reveal up from the molecular level how the N5 asparagine residue is indispensable in imparting selective complexation between lighter and heavier lanthanides by conformationally functioning as a gate.
Surabh S. KT, Baofu Qiao, Jason G. Marmorstein, Yiming Wang, Denize C. Favaro, Kathleen J. Stebe, E. James Petersson, Ravi Radhakrishnan, Cesar de la Fuente‐Nunez, Raymond S. Tu, Charles Maldarelli, Monica Olvera de la Cruz, Robert J. Messinger   +12 more
wiley   +1 more source

Rational Design of Artificial Metalloproteins and Metalloenzymes with Metal Clusters

Molecules, 2019
Metalloproteins and metalloenzymes play important roles in biological systems by using the limited metal ions, complexes, and clusters that are associated with the protein matrix.
Ying-Wu Lin
doaj   +1 more source

Zinc: Multidimensional Effects on Living Organisms

Biomedicines, 2021
Zinc is a redox-inert trace element that is second only to iron in abundance in biological systems. In cells, zinc is typically buffered and bound to metalloproteins, but it may also exist in a labile or chelatable (free ion) form.
Math P. Cuajungco, Maria Soledad Ramirez, Marcelo E. Tolmasky   +2 more
doaj   +1 more source

Nitrene Transfer Catalyzed by a Non-Heme Iron Enzyme and Enhanced by Non-Native Small-Molecule Cofactors [PDF]

, 2019
Transition-metal catalysis is a powerful tool for the construction of chemical bonds. Here we show that a non-heme iron enzyme can catalyze olefin aziridination and nitrene C–H insertion, and that these activities can be improved by directed evolution ...
Arnold, Frances H., Goldberg, Nathaniel, Knight, Anders M., Zhang, Ruijie   +3 more
core  

Metallomics in environmental and health related research: Current status and perspectives [PDF]

, 2013
Metals and metalloids play distinct roles in human health, either beneficial or toxic, depending on their concentrations and species. There is an increasing interest in metals uptake, trafficking, function, and exertion in microorganisms to maintain and ...
G.B., J, He, B, Hu, L, Sun, H, Wang, Y
core   +1 more source