Results 181 to 190 of about 15,601 (218)
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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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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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1989
A new method for gas chromatographic analysis of PQQ is presented. A sample was made weakly-alkaline and passed through a Sep-Pak C18 cartridge. The eluate was then made acid with HCl and passed through the second Sep-Pak C18 cartridge. Finally, PQQ was eluted with pyridine solution; it was evaporated to dryness.
O. Suzuki +4 more
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A new method for gas chromatographic analysis of PQQ is presented. A sample was made weakly-alkaline and passed through a Sep-Pak C18 cartridge. The eluate was then made acid with HCl and passed through the second Sep-Pak C18 cartridge. Finally, PQQ was eluted with pyridine solution; it was evaporated to dryness.
O. Suzuki +4 more
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Journal of the American College of Nutrition, 2019
Objective: Pyrroloquinoline quinone (PQQ) is a novel supplement involved in processes such as mitochondrial biogenesis and cellular energy metabolism.
Paul S. Hwang +6 more
semanticscholar +1 more source
Objective: Pyrroloquinoline quinone (PQQ) is a novel supplement involved in processes such as mitochondrial biogenesis and cellular energy metabolism.
Paul S. Hwang +6 more
semanticscholar +1 more source
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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The PQQ-alcohol dehydrogenase of Gluconacetobacter diazotrophicus
International Journal of Food Microbiology, 2008The oxidation of ethanol to acetic acid is the most characteristic process in acetic acid bacteria. Gluconacetobacter diazotrophicus is rather unique among the acetic acid bacteria as it carries out nitrogen fixation and is a true endophyte, originally isolated from sugar cane. Aside its peculiar life style, Ga. diazotrophicus, possesses a constitutive
Saúl, Gómez-Manzo +5 more
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Bioelectrochemical application of some PQQ-dependent enzymes
Bioelectrochemistry, 2002This paper focuses on the use of PQQ-dependent enzymes (PQQ enzymes) in amperometrical biosensors and gives emphasis on their innovative designs and applications. The study covers some aspects in the evolution of biosensors based on PQQ enzymes. Main attention is focused on the electrochemical properties of PQQ enzymes as very promising materials for ...
Valdas, Laurinavicius +7 more
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Oxidation of D-glucose by coenzyme PQQ: 1,2-enediolates as substrates for PQQ oxidation
Journal of the Chemical Society, Chemical Communications, 1987Studies on the oxidation of D-glucose and related substrates with coenzyme PQQ have established that 1,2-enediolates are efficient substrates for PQQ oxidation.
Shinobu Itoh +2 more
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Pyrroloquinoline Quinone (PQQ) and Quinoprotein Enzymes
Antioxidants & Redox Signaling, 2001This review summarises the characteristics, identification, and measurement of pyrroloquinoline quinone, the prosthetic group of bacterial quinoprotein dehydrogenases whose structures, mechanisms, and electron transport functions are described in detail. Type I alcohol dehydrogenase includes the "classic" methanol dehydrogenase; its x-ray structure and
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Mutants of Methylobacterium organophilum Unable to Synthesize PQQ
Antonie van Leeuwenhoek, 1989The phenotype of mutants unable to synthesize PQQ is analyzed for different categories of methylotrophic bacteria. The advantages offered by strains dissimilating methylamine through methylated amino-acids are discussed. In M.organophilum, 40% of the mutants unable to grow in methanol medium but with normal methylamine utilization, were affected in PQQ
F, Biville +3 more
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