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1Author    K. Taraz, R. Tappe, H. Schröder, U. Hohlneicher, I. Gwose, H. Budzikiewicz, G. Mohn, J. F. LefèvreRequires cookie*
 Title    Ferribactins -the Biogenetic Precursors of Pyoverdins [1]  
 Abstract    From ferribactins which accompany pyoverdins in iron deficient cultures of fluorescent pseudomonads a subunit has been obtained formed by condensation of D-tyrosin with L-2,4-diaminobutyric acid to give 2-(l-./?-amino-2-/?-hydroxyphenylethyl)-1,4,5,6-tetrahydro-pyrimidine-4-S'-carboxylic acid (1). Evidence is presented that 1 is the precursor of the typical pyoverdin chromophore 7 a. 
  Reference    Z. Naturforsch. 46c, 527—533 (1991); received February 28 1991 
  Published    1991 
  Keywords    Pyoverdins, Ferribactins, Biogenesis, N M R Analysis 
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 TEI-XML for    default:Reihe_C/46/ZNC-1991-46c-0527.pdf 
 Identifier    ZNC-1991-46c-0527 
 Volume    46 
2Author    Irm Gard Longerich, Kambiz Taraz, Herbert Budzikiewicz, LinT. Sai, Jean-M Arie MeyerRequires cookie*
 Title    Pseudoverdin, a Compound Related to the Pyoverdin Chromophore from a Pseudomonas aeruginosa Strain Incapable to Produce Pyoverdins [1]  
 Abstract    From a genetically manipulated strain o f Pseudomonas aeruginosa ATCC 15692 (PAO 1 strain) a com pound named pseudoverdin, 3-form ylam ino-6,7-dihydroxycoumarin, was obtained which is related to the typical pyoverdin chromophore and thus allows to shed some light on the biogenesis o f the latter. 
  Reference    Z. Naturforsch. 48c, 425 (1993); received November 23 1992/February 26 1993 
  Published    1993 
  Keywords    Pseudomonas aeruginosa Mutant Strain, Biogenesis, Coumarin Derivative, Pyoverdins, Siderophores 
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 TEI-XML for    default:Reihe_C/48/ZNC-1993-48c-0425.pdf 
 Identifier    ZNC-1993-48c-0425 
 Volume    48 
3Author    St Blech, H. Budzikiewicz, D. DillRequires cookie*
 Title    /?-Carboline Alkaloids from R ibes nigrum L  
 Abstract    From Ribes nigrum L. two ß-carboline alkaloids (deshydroxymethyl flazin (1) and flazin methyl ether (2)) could be isolated in minute amounts. The structure elucidation is described. The two compounds are present in the freshly pressed juice, but they are also formed during storage of the juice by condensation of tryptophane with ascorbic acid or its degradation products. This could be shown by adding 14C-labelled ascorbic acid to the juice. A fter four weeks' incubation radioactive 1 and 2 could be isolated. 
  Reference    Z. Naturforsch. 49c, 540 (1994); received May 20 1994 
  Published    1994 
  Keywords    Ribes nigrum L, ß-Carboline Alkaloids, Flazin Derivatives, Biogenesis 
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 TEI-XML for    default:Reihe_C/49/ZNC-1994-49c-0540.pdf 
 Identifier    ZNC-1994-49c-0540 
 Volume    49 
4Author    M. Böckmann, K. Taraz, H. BudzikiewiczRequires cookie*
 Title    Biogenesis of the Pyoverdin Chromophore  
 Abstract    A fter growing Pseudomonas aeruginosa in the presence of 2 ,4-[4-15N]-diaminobutyric acid (D ab) its incorporation into the quinoline chromophore of the pyoverdin produced by this bacterium could be shown by mass and NM R-spectroscopic techniques. In combination with earlier results it can thus be stated that the precursor of the chrom ophore is a condensation product of L-Dab and D-Phe or D-Tyr. A synthesis for [4 -15N ]-D ab is described. 
  Reference    Z. Naturforsch. 52c, 319 (1997); received April 17 1997 
  Published    1997 
  Keywords    Pseudomonas, Siderophores, Pyoverdin, Biogenesis, l:, N-Labelling 
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 TEI-XML for    default:Reihe_C/52/ZNC-1997-52c-0319.pdf 
 Identifier    ZNC-1997-52c-0319 
 Volume    52 
5Author    H. Schäfer, K. Taraz, H. BudzikiewiczRequires cookie*
 Title    Zur Genese der amidisch an den Chromophor von Pyoverdinen gebundenen Dicarbonsäuren |1] On the Genesis of the Dicarboxylic Acids Bound Amidically to the C hrom ophor of the Pyoverdins [1]  
 Abstract    Pseudomonas strains o f the so-called fluorescent group usually produce several pyoverdins which differ only in the nature o f a dicarboxylic acid bound amidically to the chromophor. For the pyoverdins isolated from the culture medium o f Pseudomonas fluorescens 12 it is shown that succinic acid is an artefact formed by hydrolysis o f succinic amide, and that a-ketoglutaric acid is transformed enzymatically to glutamic acid. This process is reversed after the phase o f exponential growth o f the bacteria. The ratio C4-vs. C 5-acids changes with the culture time and with increasing Fe3+ content o f the medium in favor o f the latter. 
  Reference    Z. Naturforsch. 46c, 398 (1991); received December 21 1990/March 13 1991 
  Published    1991 
  Keywords    *Pyoverdins, Biogenesis, Transformations, Citric Acid Cycle, Pseudomonas fluorescens 
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 TEI-XML for    default:Reihe_C/46/ZNC-1991-46c-0398.pdf 
 Identifier    ZNC-1991-46c-0398 
 Volume    46 
6Author    Kimiaki Yamano, Haruhisa ShirahamaRequires cookie*
 Title    Clitocybe acromelalga  
 Abstract    A new piperidine amino acid, 2,4,5-piperidinetricarboxylic acid (11) was isolated from the poisonous mushroom, Clitocybe acromelalga. The structure determination and its biogenetic potential are discussed. 
  Reference    Z. Naturforsch. 49c, 707 (1994); received July 7/August 15 1994 
  Published    1994 
  Keywords    Clitocybe acromelalga, Toadstool, Piperidine Amino Acid, 2, 4, 5-Piperidinetricarboxylic Acid, Biogenesis 
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 TEI-XML for    default:Reihe_C/49/ZNC-1994-49c-0707.pdf 
 Identifier    ZNC-1994-49c-0707 
 Volume    49