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'Biosynthesis' in keywords Facet   Publication Year 1982  [X]
Facet   section ZfN Section C  [X]
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1982[X]
1Author    R. B. Herbert, J. Mann, A. RömerRequires cookie*
 Title    Phenazine and Phenoxazinone Biosynthesis in Brevibacterium iodinum  
 Abstract    The source o f nitrogen in the phenazine, iodinin 5, and in 2-aminophenoxazinone 7 in Brevi­ bacterium iodinum cultures is shown to be primarily from the amide nitrogen of glutamine in ex­ periments with (S)-[C 015N H 2]glutamine, [15N]ammonium sulphate, and (S)-[15N]glutamic acid. The biosynthesis of 5 and 7 is closely related; biosynthesis o f 7 like that o f 5 diverts from the shi-kimic acid pathway at a stage prior to anthranilic acid 8. 
  Reference    Z. Naturforsch. 37c, 159 (1982); received October 23/December 151981 
  Published    1982 
  Keywords    Phenazines, Phenoxazinones, Biosynthesis, Brevibacterium iodinum, Nitrogen Incorporation 
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 TEI-XML for    default:Reihe_C/37/ZNC-1982-37c-0159.pdf 
 Identifier    ZNC-1982-37c-0159 
 Volume    37 
2Author    PaulM. Dewick, M. Elanie, J. Steele, RichardA. Dixon, IanM W HiteheadRequires cookie*
 Title    Biosynthesis of Isoflavonoid Phytoalexins: Incorporation of Sodium |1,2-13C2] Acetate into Phaseollin and Kievitone  
 Abstract    13C-NMR analysis of the isoflavonoid phytoalexins phaseollin and kievitone produced by feeding sodium [l,2-13C2]acetate to wounded bean (Phaseolus vulgaris) cotyledons has demon­ strated the incorporation of intact acetate units into the aromatic A rings. Phaseollin shows a specific folding of the polyketide chain, whereas kievitone exhibits a randomisation of label in accordance with the intermediacy of a 2',4',6'-trihydroxylated chalcone during its formation. In neither case was sufficient label incorporated into analysis. 
  Reference    Z. Naturforsch. 37c, 363—368 (1982); received February 18 1982 
  Published    1982 
  Keywords    Biosynthesis, 13C-NMR, Phytoalexin, Phaseollin, Kievitone, Isoflavonoid 
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 TEI-XML for    default:Reihe_C/37/ZNC-1982-37c-0363.pdf 
 Identifier    ZNC-1982-37c-0363 
 Volume    37 
3Author    G. Stotz, G. ForkmRequires cookie*
 Title    Hydroxylation of the B-Ring of Flavonoids in the 3'-and 5'-Position with Enzyme Extracts from Flowers of Verbena hybrida  
 Abstract    Enzyme preparations from flowers of Verbena hybrida do not only catalyse hydroxylation of the B-ring of flavanones and dihydroflavonols in the 3'-position but also in the 5'-position. Enzyme activity for 3',5'-hydroxylation was found to be localized in the microsomal fraction and required NADPH as cofactor. Evidence is provided that the formation o f the 3',4\5'-hydroxylated flavanone (5,7,3',4',5'-pentahydroxyflavanone) and dihydroflavonol (dihydromy-ricetin), respectively, proceeds via the corresponding 3',4'-hydroxylated compounds eriodictyol and dihydroquercetin, respectively, which are most probably formed by action o f the same enzyme. Enzyme activity for 3',5'-hydroxylation was found to be strictly correlated with the prescence of 3',4',5'-hydroxylated flavonoid compounds in the flowers. 
  Reference    Z. Naturforsch. 37c, 19—23 (1982); received October 141981 
  Published    1982 
  Keywords    Anthocyanins, Flavonoids, Biosynthesis, Flavonoid 3', 5'-Hydroxylation, Verbena hybrida 
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 TEI-XML for    default:Reihe_C/37/ZNC-1982-37c-0019.pdf 
 Identifier    ZNC-1982-37c-0019 
 Volume    37 
4Author    Lutz Heide, Eckhard LeistnerRequires cookie*
 Title    Versuche zur Synthese natürlich vorkommender prenylierter Naphthalinderivate. Nachweis eines neuen Prenylnaphthochinon- derivates in Galium mollugo Synthesis o f Naturally Occurring Prenylated N aphthalene Derivates. Isolation of a New Prenylnaphthoquinone from Galium mollugo  
 Abstract    prenylated naphthalene derivatives were synthesized and characterized by spectro­ scopic methods. One of these compounds, 2-methoxycarbonyl-3-prenyl-1,4-naphthoquinone, was detected as a new natural product in the root system of Galium mollugo L. This new natural product is likely to be related to the biosynthesis of mollugin and anthraquinones. 
  Reference    Z. Naturforsch. 37c, 354 (1982); received January 21 1982 
  Published    1982 
  Keywords    Galium mollugo L, Biosynthesis, Anthraquinones, Naphthalene Derivatives, Prenylation Several 
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 TEI-XML for    default:Reihe_C/37/ZNC-1982-37c-0354.pdf 
 Identifier    ZNC-1982-37c-0354 
 Volume    37 
5Author    A. Römer, R. B. HerbertRequires cookie*
 Title    Further Observations on the Source of Nitrogen in Phenazine Biosynthesis  
 Abstract    It is concluded from experiments with (S)-[C015NH2]glutamine and [15N]ammonium sulphate that the biosynthesis of iodinin (1), in Brevibacterium iodinum, and of phenazine-1-carboxylic acid (7), in Pseudomonas aureofaciens, is primarily from a single nitrogen source (glutamine) and that 
  Reference    Z. Naturforsch. 37c, 1070—1074 (1982); received July 26 1982 
  Published    1982 
  Keywords    Phenazines, Biosynthesis, Nitrogen Incorporation, Brevibacterium iodinum, Pseudomonas aureofa-ciens 
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 TEI-XML for    default:Reihe_C/37/ZNC-1982-37c-1070.pdf 
 Identifier    ZNC-1982-37c-1070 
 Volume    37