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ChemInform Abstract: Formation of Derivatives of PQQ and PQQ‐Triester for the Detection of PQQ.
ChemInform, 1994AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
P. MARTIN, T. WINKLER
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Trends in Biochemical Sciences, 1989
The recently discovered redox coenzyme, PQQ (methoxatin), is widely distributed. Quantitation of protein-bound PQQ has been difficult, but unique redox cycling reactions, which reflect its striking biological properties, reveal trace amounts. PQQ is a potential target for drugs.
P M, Gallop +3 more
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The recently discovered redox coenzyme, PQQ (methoxatin), is widely distributed. Quantitation of protein-bound PQQ has been difficult, but unique redox cycling reactions, which reflect its striking biological properties, reveal trace amounts. PQQ is a potential target for drugs.
P M, Gallop +3 more
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Biosensors and Bioelectronics, 2004
The performance of pyrroloquinoline quinone (PQQ) dependent alcohol dehydrogenase (ADH) and two types of PQQ-glucose dehydrogenases in solution and when immobilized on the carbon paste electrodes modified with ferrocene derivatives is investigated. The immobilization of ADH consisting of PQQ and four hemes improves its stability up to 10 times.
Valdas, Laurinavicius +3 more
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The performance of pyrroloquinoline quinone (PQQ) dependent alcohol dehydrogenase (ADH) and two types of PQQ-glucose dehydrogenases in solution and when immobilized on the carbon paste electrodes modified with ferrocene derivatives is investigated. The immobilization of ADH consisting of PQQ and four hemes improves its stability up to 10 times.
Valdas, Laurinavicius +3 more
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Derivatisierung von PQQ und PQQ‐Triester für den Nachweis von PQQ
Helvetica Chimica Acta, 1993Formation of derivatives of PQQ and PQQ‐Triester for the Detection of PQQPQQ is an organic redox/cofactor found in a class of enzymes called quinoproteins. It has been reported that materials like milk, egg yolk, vinegar, beer, serum, urine, and biological tissues contain little amounts of PQQ.
Pierre Martin, Tammo Winkler
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The Biochemistry, Physiology and Genetics of PQQ and PQQ-containing Enzymes
1998Pyrrolo-quinoline quinone (PQQ) is the non-covalently bound prosthetic group of many quinoproteins catalysing reactions in the periplasm of Gram-negative bacteria. Most of these involve the oxidation of alcohols or aldose sugars. PQQ is formed by fusion of glutamate and tyrosine, but details of the biosynthetic pathway are not known; a polypeptide ...
P M, Goodwin, C, Anthony
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The Role of PQQ in K.aerogenes and Cloning of pqq Genes
1989Enterobacteriaceae transport glucose into the cell by means of the PEP-dependent carbohydrate phosphotransferase system (PTS). In Klebsiella aerogenes an alternative pathway exists involving a glucose dehydrogenase (GLD, facing the periplasm) which uses pyrroloquinoline quinone (PQQ) as cofactor and is linked to the respiratory chain. It probably plays
J. J. M. Meulenberg +3 more
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The Biomedical Significance of PQQ
2020This chapter presents an overview of the biomedical significance of Pyrroloquinoline quinone (PQQ). It was first isolated from cultures of methylotrophic bacteria as an acetone adduct and its structure determined by X-ray diffraction and confirmed by organic synthesis. PQQ captures electrons from primary amines, catechols, catecholamines, ascorbic acid,
Mercedes A. Paz +2 more
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2020
Pyrroloquinoline quinone (PQQ) biosynthesis is complicated by the fact that it is synthesized in the cytoplasm and must then find its way to the periplasm where the active enzyme/cofactor complex is assembled. Clearly the a-nitrogen of tyrosine was not randomized in PQQ, demonstrating that tyrosine, and not its requisite a-keto acid, is the precursor ...
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Pyrroloquinoline quinone (PQQ) biosynthesis is complicated by the fact that it is synthesized in the cytoplasm and must then find its way to the periplasm where the active enzyme/cofactor complex is assembled. Clearly the a-nitrogen of tyrosine was not randomized in PQQ, demonstrating that tyrosine, and not its requisite a-keto acid, is the precursor ...
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Pharmacological Application of PQQ
2020This chapter summarizes previous experimental data on pharmacological effects of Pyrroloquinoline quinone (PQQ) specifically with respect to acetaldehyde metabolism following ethanol loading to rats and the protective effects of PQQ against hepatotoxin-induced liver injury in rats and against hydrocortisone-induced cataract formation in chick embryos ...
Akiharu Watanabe +4 more
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Life Sciences, 1993
The effects of pyrroloquinoline quinone (PQQ) and PQQ-oxazole (PQQ-glycine adduct) on DNA synthesis were examined using cultured human fibroblasts. Confluent fibroblasts were cultured in serum-free Dulbecco's modified Eagle's media, and various concentrations of PQQ and PQQ-oxazole were added to the media.
Y, Naito +3 more
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The effects of pyrroloquinoline quinone (PQQ) and PQQ-oxazole (PQQ-glycine adduct) on DNA synthesis were examined using cultured human fibroblasts. Confluent fibroblasts were cultured in serum-free Dulbecco's modified Eagle's media, and various concentrations of PQQ and PQQ-oxazole were added to the media.
Y, Naito +3 more
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