Results 111 to 120 of about 642,898 (140)

Molybdenum and tungsten enzymes: a crystallographic and mechanistic overview

Dalton Transactions, 2009
Molybdenum and tungsten enzymes which contain the pyranopterin cofactor are ubiquitous in Nature and perform a wide variety of biological functions. They catalyze a diversity of mostly two-electron oxidation-reduction reactions crucial in the metabolism of nitrogen, sulfur and carbon. These enzymes share common structural features, but reveal different
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[Kinetic method of tungsten analysis in tungsten-containing enzymes].

Prikladnaia biokhimiia i mikrobiologiia, 2002
A highly sensitive method for tungsten detection in proteins based on the ability of this metal to catalyze the oxidation of with hydrogen peroxide is described. The method allows determining tungsten in protein samples in the concentration range of -0.05 to -0.4 microgram/ml. Molybdenum, at a concentration lower than half the concentration of tungsten,
A N, Nosikov, E V, Chichikalo, N P, L'vov   +2 more
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CHAPTER 5. Electrochemistry of Molybdenum and Tungsten Enzymes

2016
As nearly all Mo- and W-dependent enzymes catalyze oxidation and reduction reactions, electrochemistry is an ideal physical method to be applied in the study of the reactivity of these systems. Electrochemical communication between the enzyme and an electrode is of paramount importance and many experimental approaches can be taken to achieve this goal.
Palraj Kalimuthu, Paul V. Bernhardt
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New Pyranopterin Chemistry Related to Molybdenum and Tungsten Enzymes

2002
A large group of molybdo- and tungstoenzymes utilizes “molybdopterin,” a hydrogenated pterin component, in the molybdenum cofactor (Moco) (1). Recent X-ray crystal structures of metal-molybdopterin enzymes have revealed at least three different structural types for Moco (2).
D. Guschin, W. Belliston, I. M. Müller, B. Fischer   +3 more
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Bioinorganic Chemistry of Pterin-Containing Molybdenum and Tungsten Enzymes

1993
Publisher Summary This chapter presents a discussion on the bioinorganic chemistry of pterin-containing molybdenum and tungsten enzymes. The chapter focuses on the current results and the interplay of model and enzyme chemistry. Attention is directed to sulfite oxidase and xanthine oxidase, the archetypal examples of molybdenum enzymes, containing ...
John H. Enemark, Charles G. Young
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Electrochemistry of molybdenum and tungsten enzymes

2017
As nearly all Mo- and W-dependent enzymes catalyze oxidation and reduction reactions, electrochemistry is an ideal physical method to be applied in the study of the reactivity of these systems. Electrochemical communication between the enzyme and an electrode is of paramount importance and many experimental approaches can be taken to achieve this goal.
Kalimuthu, Palraj, Bernhardt, Paul V.
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CHAPTER 10. Tungsten-Containing Enzymes

2016
This review on the biochemistry of W-containing enzymes, or tungstoenzymes, starts and ends with the question: “why tungsten?” Structural, kinetic and mechanistic properties of the enzymes are evaluated and related to the common division into two families and several classes.
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Metal chemistry relevant to the mononuclear molybdenum and tungsten pterin enzymes

Chemical Communications, 1997
In the light of recent protein crystal structures, metal chemistry underpinning the action of oxygen-atom transfer enzymes which contain molybdenum and tungsten pterin centres is outlined.
Charles G. Young, Anthony G. Wedd
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CHAPTER 1. Molybdenum and Tungsten-Containing Enzymes: An Overview

2016
Molybdenum is essential to most organisms, being found in the active site of enzymes that catalyze redox reactions involving carbon, nitrogen and sulfur atoms of key metabolites. Some of the molybdenum-dependent reactions constitute key steps in the global biogeochemical cycles of carbon, nitrogen and sulfur, with particular emphasis on the atmospheric
Luisa B. Maia, Isabel Moura, José J. G. Moura   +2 more
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Tungsten-Substituted Molybdenum Enzymes

2002
C David, Garner, Lisa J, Stewart
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