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  • Articles: DFG German National Licenses  (6)
  • Acinetobacter baumannii  (3)
  • standing potential  (3)
  • 1
    Electronic Resource
    Electronic Resource
    Isolation and structure elucidation of acinetobactin, a novel siderophore from Acinetobacter baumannii (1994)
    Springer
    Archives of microbiology 162 (1994), S. 249-254 
    Details
    ISSN: 1432-072X
    Keywords: Key words     Siderophore ; Iron-uptake ; Acinetobacter baumannii ; Acinetobactin ; ω-N-Hydroxyhistamine ; 2 ; 3-Dihydroxybenzoic acid
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract      A novel siderophore, called acinetobactin, with both catecholate and hydroxamate functional groups was isolated from low-iron cultures of Acinetobacter baumannii ATCC 19606. The structure was elucidated by chemical degradation, fast-atom bombardment mass spectrometry and 1H and 13C NMR spectroscopy. Acinetobactin was composed of ω-N-hydroxyhistamine, threonine and 2,3-dihydr ybenzoic acid, the last two components forming an oxazoline ring. Acinetobactin was structurally related to anguibactin, a plasmid-encoded siderophore of Vibrio anguillarum. The only difference was that acinetobactin possessed an oxazoline ring instead of a thiazoline ring. Four of 12 other clinical A. baumannii strains examined produced acinetobactin, indicative of strain-to-strain variation in the ability to produce acinetobactin. In addition, a relatively small amount of acinetobactin w as also detected in A. haemolyticus ATCC 17906.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00301846
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    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Isolation and structure elucidation of acinetobactin., a novel siderophore from Acinetobacter baumannii (1994)
    Springer
    Archives of microbiology 162 (1994), S. 249-254 
    Details
    ISSN: 1432-072X
    Keywords: Siderophore ; Iron-uptake ; Acinetobacter baumannii ; Acinetobactin ; ω-N-Hydroxyhistamine 2,3-Dihydroxybenzoic acid
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract A novel siderophore, called acinetobactin, with both catecholate and hydroxamate functional groups was isolated from low-iron cultures of Acinetobacter baumannii ATCC 19606. The structure was elucidated by chemical degradation, fast-atom bombardment mass spectrometry and 1H and 13C NMR spectroscopy. Acinetobactin was composed of ω-N-hydroxyhistamine, threonine and 2,3-dihydroxybenzoic acid, the last two components forming an oxazoline ring. Acinetobactin was structurally related to anguibactin, a plasmid-encoded siderophore of Vibrio anguillarum. The only difference was that acinetobactin possessed an oxazoline ring instead of a thiazoline ring. Four of 12 other clinical A. baumannii strains examined produced acinetobactin, indicative of strain-to-strain variation in the ability to produce acinetobactin. In addition, a relatively small amount of acinetobactin was also detected in A. haemolyticus ATCC 17906.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00301846
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    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Sequence analysis of the gene encoding a novel l-2,4-diaminobutyrate decarboxylase of Acinetobacter baumannii: similarity to the group II amino acid decarboxylases (1996)
    Springer
    Archives of microbiology 166 (1996), S. 128-131 
    Details
    ISSN: 1432-072X
    Keywords: Key wordsl-2 ; 4-Diaminobutyrate decarboxylase ; Acinetobacter baumannii ; Nucleotide sequence ; 1 ; 3-Diaminopropane ; Pyridoxal 5′-phosphate enzyme
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The gene (ddc) encoding a novel enzyme, l-2,4-diaminobutyrate decarboxylase (DABA-DC; EC 4.1.1.-) in Acinetobacter baumannii was sequenced, and an open reading frame of 1,530 nucleotides was detected. The sequence of 20 N-terminal amino acids of purified DABA-DC and of its proteolytic peptide fragments coincided with those deduced from the nucleotide sequence determined. Comparison of the predicted amino acid sequence of the A. baumannii enzyme with those of other pyridoxal 5′-phosphate-dependent decarboxylases revealed significant similarity to the group II amino acid decarboxylases and conservation of the putative pyridoxal 5′-phosphate-binding domain.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002030050366
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Hyperosmolarity response of ocular standing potential as a clinical test for retinal pigment epithelium activity rhegmatogenous retinal detachment (1984)
    Springer
    Documenta ophthalmologica 57 (1984), S. 175-180 
    Details
    ISSN: 1573-2622
    Keywords: retinal detachment ; standing potential ; hyperosmolarity response ; light peak/dark trough (L/D) ratio ; electro-oculogram (EOG)
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The hyperosmolarity response of the ocular standing potential was recorded in unilateral rhegmatogenous retinal detachment (8 eyes) and in the fellow ‘healthy’ eye (8 eyes). The hyperosmolarity response was greatly suppressed (M-4 SD: M and SD indicate respectively the mean and the standard deviation in normal subjects) in all affected eyes (p 〈 0.005), and slightly abnormal in 2 fellow eyes. The L/D ratio was normal in 2 affected eyes and in all fellow eyes. The hyperosmolarity response in the affected eyes was still greatly suppressed 14 months after successful surgical treatment.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00143081
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    Hyperosmolarity response of ocular standing potential as a clinical test for retinal pigment epithelium activity chorioretinal dystrophies (1984)
    Springer
    Documenta ophthalmologica 57 (1984), S. 163-173 
    Details
    ISSN: 1573-2622
    Keywords: retinal pigment epithelium (RPE) ; standing potential ; hyperosmolarity response ; retinitis pigmentosa ; central and pericentral retinitis pigmentosa ; pigmented paravenous retinochoroidal atrophy ; fundus albipunctatus ; Stargardt's disease ; fundus flavimaculatus ; light peak/dark trough (L/D) ratio ; Diamox response ; electro-oculogram(EOG)
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The hyperosmolarity response of the standing potential was recorded in retinitis pigmentosa (20 eyes), central (pericentral) retinitis pigmentosa (4 eyes), pigmented paravenous retinochoroidal atrophy (2 eyes), fundus albipunctatus (8 eyes), and Stargardt's disease (or fundus flavimaculatus) (14 eyes). The light peak/dark trough ratio (the L/D ratio) and the Diamox response were also determined. The hyperosmolarity response was greatly suppressed (less than M-4SD; M and SD indicate respectively the mean and the standard deviation in normal control subjects) in all examined eyes with retinitis pigmentosa (20 eyes) including retinitis pigmentosa sine pigmento (8 eyes), central (pericentral) retinitis pigmentosa (4 eyes), and pigmented paravenous retinochoroidal atrophy (2 eyes). The L/D ratio was larger than 1.26 (M-2.5 SD) in the half of the eyes with the above-described diseases. The hyperosmolarity response was abnormal (less than M-2 SD) in 4 of 8 eyes with fundus albipunctatus. The L/D ratio was normal in all 8 eyes. The hyperosmolarity response was abnormal (less than M-2 SD) in all 14 eyes with Stargardt's disease or fundus flavimaculatus. The L/D ratio was abnormal in 5 of these 14 eyes. The hyperosmolarity response was more frequently abnormal than the L/D ratio in the chorioretinal dystrophies mentioned above, and hence is useful particularly for early diagnosis of these disorders.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00143080
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    Paper (German National Licenses)
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  • 6
    Electronic Resource
    Electronic Resource
    Hyperosmolarity response of ocular standing potential as a clinical test for retinal pigment epithelium activity Diabetic retinopathy (1984)
    Springer
    Documenta ophthalmologica 58 (1984), S. 375-384 
    Details
    ISSN: 1573-2622
    Keywords: diabetic retinopathy ; standing potential ; hyperosmolarity response ; Diamox response ; light peak/dark trough (L/D) ratio ; electro-oculogram (EOG)
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The hyperosmolarity response, a drug-induced response from the retinal pigment epithelium, was recorded in diabetic retinopathy. The hyperosmolarity response was occasionally abnormal at the pre-retinopathic stage and at the first stage of retinopathy by Scott classification. The response was frequently abnormal at the second and third stages of retinopathy. The hyperosmolarity response is useful for early diagnosis of pigment epitheliopathy in diabetes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00679800
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    Paper (German National Licenses)
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