Concept

Métalloprotéine

Publications associées (73)

An Iron Carbonyl Pyridonate Complex Related to the Active Site of the [Fe]-Hydrogenase (Hmd)

Rosario Scopelliti, Xile Hu, Blaise Valentin Obrist, Dafa Chen

A mononuclear iron bis(carbonyl) pyridonate complex (1), which exhibits several common structural features with the active site of the iron−sulfur cluster-free [Fe]- hydrogenase, was synthesized and characterized. Spectroscopic data of 1 suggests a 2+ oxid ...

2009

Unraveling the Catalytic Pathway of Metalloenzyme Farnesyltransferase through QM/MM Computation

Matteo Dal Peraro

The protein farnesyltransferase (FTase) is a Zn2+-metalloenzyme that catalyzes the farnesylation reaction, i.e., the transfer of the 15-carbon atom farnesyl group from farnesyl diphosphate (FPP) to a specific cysteine of protein substrates. Oncogenic Ras p ...

2009

Trace Metal Speciation and Bioavailability in Surface Waters of the Black Sea Coastal Area Evaluated by HF-PLM and DGT

Trace metal speciation in seawater from the Bulgarian Black Sea coast was studied in situ by hollow fiber permeation liquid membrane (HF-PLM) and by diffusion gradients in thin-film gels (DGT). The concentrations of Cd, Cu, Ni, and Pb determined by HF-PLM ...

2009

Femtosecond XANES Study of the Light-Induced Spin Crossover Dynamics in an Iron(II) Complex

Majed Chergui, Paul Beaud, Wojciech Gawelda, Camelia Borca, Van Thai Pham, Renske Marjan van der Veen

X-ray absorption spectroscopy is a powerful probe of mol. structure, but it has previously been too slow to track the earliest dynamics after photoexcitation. We investigated the ultrafast formation of the lowest quintet state of aq. iron(II) tris(bipyridi ...

2009

Metal-organic coordination interactions in Fe-Terephthalic acid networks on Cu(100)

Klaus Kern, Giovanni Costantini

Metal-organic coordination interactions are prime candidates for the formation of self-assembled, nanometer-scale periodic networks with room-temperature structural stability. We present X-ray photoelectron spectroscopy measurements of such networks at the ...

2008

Phosphodiester Cleavage in Ribonuclease H Occurs via an Associative Two-Metal-Aided Catalytic Mechanism

Matteo Dal Peraro

Ribonuclease H (RNase H) belongs to the nucleotidyl-transferase (NT) superfamily and hydrolyzes the phosphodiester linkages that form the backbone of the RNA strand in RNA x DNA hybrids. This enzyme is implicated in replication initiation and DNA topology ...

2008

Physicochemical Properties and Theoretical Modeling of Actinide Complexes with a para-tert-Butylcalix[6]arene Bearing Phosphinoyl Pendants. Extraction Capability of the Calixarene toward f Elements

Jean-Claude Bünzli

The coordination ability of the hexaphosphinoylated p-tert-butylcalix[6]arene

B_6bL^6

toward actinides is established, as well as its good separation ability of the actinide ions

UO_2 ^{2+}

and Th(IV) over trivalent rare earths such as La(III), Eu(III) ...

2008

Lanthanide Complexes with a Calix[8]arene Bearing Phosphinoyl Pendant Arms

Jean-Claude Bünzli, Anne-Sophie Chauvin

The phosphinoyl-substituted macrocyclic receptor B8bL8, derived from p-tert-butylcalix[8]arene, was synthesized and its structure was studied in solution. According to temperaturedependent 1H and 31P NMR spectroscopic data, the calix[8]arene adopts a so-ca ...

2007

Thermal stability of thin film corundum-type solid solutions of (Al1-xCrx)2O3 synthesized under low temperature non equilibrium conditions

A novel cathodic arc evaporation process operated in pure oxygen forms corundum-type micro-crystalline structures at temperatures below 600°C. Thermally stable crystalline solid solutions of corundum-type (Al 1-xCrx)2Oy have been prepared with this method ...

2007

Ultrafast Nonadiabatic Dynamics of [FeII(bpy)3]2+ in Solution

Majed Chergui, Frank van Mourik, Andrea Cannizzo, Wojciech Gawelda, Van Thai Pham

The ultrafast relaxation of aq. Fe(II)-tris(bipyridine) upon excitation into the singlet metal-to-ligand charge-transfer band (1MLCT) was characterized by femtosecond fluorescence up-conversion and transient absorption (TA) studies. The fluorescence expt. ...

2007

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Physicochemical Properties and Theoretical Modeling of Actinide Complexes with a para-tert-Butylcalix[6]arene Bearing Phosphinoyl Pendants. Extraction Capability of the Calixarene toward f Elements

Jean-Claude Bünzli

The coordination ability of the hexaphosphinoylated p-tert-butylcalix[6]arene

B_6bL^6

toward actinides is established, as well as its good separation ability of the actinide ions

UO_2 ^{2+}

and Th(IV) over trivalent rare earths such as La(III), Eu(III) ...

2008