The Quinoid Cofactors, Pyrroloquinoline Quinone (PQQ), Topaquinone (TPQ) and Tryptophan Tryptophylquinone (TTQ)
نویسندگان
چکیده
منابع مشابه
The pyrroloquinoline quinone (PQQ)-containing quinoprotein dehydrogenases.
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This review is concerned with the structure and function of the quinoprotein enzymes, sometimes called quinoenzymes. These have prosthetic groups containing quinones, the name thus being analogous to the flavoproteins containing flavin prosthetic groups. Pyrrolo-quinoline quinone (PQQ) is non-covalently attached, whereas tryptophan tryptophylquinone (TTQ), topaquinone (TPQ) and lysine tyrosylqu...
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Amines are a carbon source for the growth of a number of bacterial species and they also play key roles in neurotransmission, cell growth and differentiation, and neoplastic cell proliferation. Enzymes have evolved to catalyse these reactions and these oxidoreductases can be grouped into the flavoprotein and quinoprotein families. The mechanism of amine oxidation catalysed by the quinoprotein a...
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Pyrroloquinoline quinone (4, 5-dihydro(4), 5-dioxo(1) H-pyrroloquinoline-2,7, 9 tricarboxylic acid) being a three ortho cyclic quinone substitutes the role of a redox-cofactor for various bacterial dehydrogenases such as methanol, ethanol and glucose dehydrogenases [1-6] also termed as methotaxin [7]. PQQ structure prediction shows that it has been originated from tyrosine and Glutamic-acid [8]...
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Hitherto unknown effects of Pyrroloquinoline quinone (PQQ) in 6-n-propyl-2-thiouracil (PTU)induced oxidative stress and lipid peroxidation were investigated in adult mice. Animals received either PTU (0.05% in drinking water) alone for 5 weeks or PTU + three different concentrations of PQQ, after which alterations in tissue lipid peroxidation (LPO) and in enzymatic activities of superoxide dism...
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ژورنال
عنوان ژورنال: Journal of Nutritional Science and Vitaminology
سال: 1992
ISSN: 0301-4800,1881-7742
DOI: 10.3177/jnsv.38.special_220