- Novel bacterial molybdenum and tungsten enzymes: three-dimensional structure, spectroscopy, and reaction mechanism.
Novel bacterial molybdenum and tungsten enzymes: three-dimensional structure, spectroscopy, and reaction mechanism.
Biological chemistry (2005-10-13)
Matthias Boll, Bernhard Schink, Albrecht Messerschmidt, Peter M H Kroneck
PMID16218872
ABSTRACT
The molybdenum enzymes 4-hydroxybenzoyl-CoA reductase and pyrogallol-phloroglucinol transhydroxylase and the tungsten enzyme acetylene hydratase catalyze reductive dehydroxylation reactions, i.e., transhydroxylation between phenolic residues and the addition of water to a triple bond. Such activities are unusual for this class of enzymes, which carry either a mononuclear Mo or W center. Crystallization and subsequent structural analysis by high-resolution X-ray crystallography has helped to resolve the reaction centers of these enzymes to a degree that allows us to understand the interaction of the enzyme and the respective substrate(s) in detail, and to develop a concept for the respective reaction mechanism, at least in two cases.
MATERIALS
Product Number
Brand
Product Description
Tungsten, foil, light tested, 25x25mm, thickness 0.025mm, as rolled, 99.95%
Tungsten, insulated wire, 5m, conductor diameter 0.0125mm, insulation thickness 0.0035mm, polyimide insulation, 99.9%
Tungsten, insulated wire, 0.2m, conductor diameter 0.015mm, insulation thickness 0.002mm, polyimide insulation, 99.9%
Tungsten, foil, light tested, 150x150mm, thickness 0.075mm, as rolled, 99.95%
Tungsten, insulated wire, 20m, conductor diameter 0.05mm, insulation thickness 0.008mm, polyimide insulation, 99.9%
Tungsten, foil, 5m coil, thickness 0.05mm, coil width .51mm, as rolled, 99.95%
Tungsten, foil, 5m coil, thickness 0.10mm, coil width .9mm, as rolled, 99.95%
Tungsten, foil, 5m coil, thickness 0.1mm, coil width 1.5mm, as rolled, 99.95%
Tungsten, insulated wire, 0.5m, conductor diameter 0.015mm, insulation thickness 0.002mm, polyimide insulation, 99.9%
Tungsten, foil, not light tested, 25x25mm, thickness 0.004mm, 99.95%
Tungsten, foil, 5m coil, thickness 0.035mm, coil width .5mm, as rolled, 99.95%
Tungsten, insulated wire, 2m, conductor diameter 0.0125mm, insulation thickness 0.0035mm, polyimide insulation, 99.9%
Tungsten, foil, 5m coil, thickness 0.025mm, coil width 1mm, as rolled, 99.95%
Tungsten, foil, light tested, 150x150mm, thickness 0.025mm, as rolled, 99.95%
Tungsten, microfoil, disks, 10mm, thinness 0.1μm, specific density 182μg/cm2, permanent mylar 3.5μm support, 99.95%
Tungsten, insulated wire, 2m, conductor diameter 0.015mm, insulation thickness 0.002mm, polyimide insulation, 99.9%
Tungsten, insulated wire, 0.2m, conductor diameter 0.0125mm, insulation thickness 0.0035mm, polyimide insulation, 99.9%
Tungsten, foil, light tested, 150x150mm, thickness 0.05mm, as rolled, 99.95%
Tungsten, microfoil, disks, 10mm, thinness 0.05μm, specific density 96μg/cm2, permanent mylar 3.5μm support, 99.95%
Tungsten, insulated wire, 5m, conductor diameter 0.075mm, insulation thickness 0.02mm, PTFE (polytetrafluoroethylene) insulation, 99.9%
Tungsten, insulated wire, 10m, conductor diameter 0.05mm, insulation thickness 0.008mm, polyimide insulation, 99.9%
Tungsten, foil, not light tested, 25x25mm, thickness 0.006mm, 99.95%
Tungsten, microfoil, disks, 10mm, thinness 0.25μm, specific density 474μg/cm2, permanent mylar 3.5μm support, 99.95%
Tungsten, insulated wire, 2m, conductor diameter 0.025mm, insulation thickness 0.005mm, polyimide insulation, 99.9%
Tungsten, foil, not light tested, 100x100mm, thickness 0.0125mm, 99.95%
Tungsten, lump, 100g, max. size 5mm
Tungsten, insulated wire, 10m, conductor diameter 0.075mm, insulation thickness 0.02mm, PTFE (polytetrafluoroethylene) insulation, 99.9%
Tungsten, insulated wire, 5m, conductor diameter 0.05mm, insulation thickness 0.008mm, polyimide insulation, 99.9%
Tungsten, foil, light tested, 25x25mm, thickness 0.015mm, 99.95%
Tungsten, foil, not light tested, 50x50mm, thickness 0.004mm, 99.95%