Results 131 to 140 of about 3,913 (172)
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Bacterial NAD(P)-independent quinate dehydrogenase is a quinoprotein
Archives of Microbiology, 1988Acinetobacter calcoaceticus LMD 79.41 produced significant amounts of pyrrolo-quinoline quinone (PQQ) in its culture medium when grown on quinic acid or shikimic acid. Studies with LMD 79.41 and PQQ- -mutants of this strain demonstrated that this organism contains an NAD(P)-independent quinate dehydrogenase (QDH) (EC 1.1.99.-), catalyzing the first ...
M A, van Kleef, J A, Duine
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Phytochemistry, 2013
Complexation of alkaloids is an important strategy plants utilize to facilitate storage in vacuoles and avoid autotoxicity. Previous studies have implicated hydroxycinnamoyl quinate esters in the complexation of purine alkaloids in Coffea arabica. The goal of this study was to determine if Erythroxylum coca uses similar complexation agents to store ...
Jonathan Gershenzon +2 more
exaly +4 more sources
Complexation of alkaloids is an important strategy plants utilize to facilitate storage in vacuoles and avoid autotoxicity. Previous studies have implicated hydroxycinnamoyl quinate esters in the complexation of purine alkaloids in Coffea arabica. The goal of this study was to determine if Erythroxylum coca uses similar complexation agents to store ...
Jonathan Gershenzon +2 more
exaly +4 more sources
Dehydration of Quinate Derivatives: Synthesis of a Difluoromethylene Homologue of Shikimic Acid
Synlett, 2002An optimised procedure for the conversion of a quinate to shikimate structure has been developed using Martin's Sulfurane {Ph2S[OC(CF3)2Ph]2}. This protocol has been exploited in the synthesis of a novel difluoromethylene homologue of shikimic acid.
Box, Julian M. +5 more
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First diastereoselective synthesis of methyl caffeoyl- and feruloyl-muco-quinates
Organic & Biomolecular Chemistry, 2012We report on a diastereoselective synthesis of six derivatives of caffeoyl- and feruloyl-muco-quinic acids. All the muco-quinic acid derivatives were obtained in excellent yield in five steps starting from quinic acid, caffeic acid and ferulic acid.
Rakesh, Jaiswal +2 more
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Utilization of quinate andp-hydroxybenzoate by actinomycetes: key enzymes and taxonomic relevance
Journal of Basic Microbiology, 1998474 strains of the actinomycete genera Streptomyces (including species of the former genera Chainia and Streptoverticillium), Pseudonocardia and Micromonospora were examined for their ability to degrade quinate (Q) and p-hydroxybenzoate (pHB); selected strains were also tested for their capacity to catabolize benzoate (B).
E, Grund, H J, Kutzner
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Pest Management Science, 2009
Abstract BACKGROUND: The herbicide glyphosate inhibits the biosynthesis of aromatic amino acids by blocking the shikimate pathway. Imazethapyr and chlorsulfuron are two herbicides that act by inhibiting branched‐chain amino acid biosynthesis.
Luis, Orcaray +4 more
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Abstract BACKGROUND: The herbicide glyphosate inhibits the biosynthesis of aromatic amino acids by blocking the shikimate pathway. Imazethapyr and chlorsulfuron are two herbicides that act by inhibiting branched‐chain amino acid biosynthesis.
Luis, Orcaray +4 more
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Biochemical Genetics, 1982
In the ascomycetous fungus Aspergillus nidulans, the expression of two inducible, contiguous or closely linked genes (qutB and qutC) which encode enzymes for quinate breakdown to protocatechuate, appears to be controlled by the product of a tightly linked third genet (qutA). The qut gene cluster locates on chromosome VIII.
A R, Hawkins, N H, Giles, J R, Kinghorn
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In the ascomycetous fungus Aspergillus nidulans, the expression of two inducible, contiguous or closely linked genes (qutB and qutC) which encode enzymes for quinate breakdown to protocatechuate, appears to be controlled by the product of a tightly linked third genet (qutA). The qut gene cluster locates on chromosome VIII.
A R, Hawkins, N H, Giles, J R, Kinghorn
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Purification and characterization of the quinate: Oxidoreductase from Phaseolus mungo sprouts
Phytochemistry, 1993Abstract A quinate: oxidoreductase which catalyses the interconversion of (−)-quinic acid and 3-dehydroquinic acid, was extracted from the homogenate of Phaseolus mungo sprouts bought from a supermarket and purified by ammonium sulphate fractionation, anion exchange (DEAE-cellulose), hydrophobic interaction (Phenyl-Sepharose), affinity (Blue ...
Xiangbo Kang, Renate Scheibe
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Fitoterapia
Six new sesquineolignans (1-6), have been isolated and elucidated from the stems of Akebia quinate together with five known analogues (7-11). Their structures were elucidated on the basis of comprehensive analysis of UV, IR, NMR, HRESIMS and CD spectroscopy experiments.
Wen-Hui, Xu +8 more
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Six new sesquineolignans (1-6), have been isolated and elucidated from the stems of Akebia quinate together with five known analogues (7-11). Their structures were elucidated on the basis of comprehensive analysis of UV, IR, NMR, HRESIMS and CD spectroscopy experiments.
Wen-Hui, Xu +8 more
openaire +2 more sources