Elisabeth Helmke
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Explore the profile of Elisabeth Helmke including associated specialties, affiliations and a list of published articles.
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23
Citations
404
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Recent Articles
1.
Shaaban M, Shaaban K, Helmke E, Grun-Wollny I, Laatsch H
Nat Prod Commun
. 2018 Dec;
12(3):351-354.
PMID: 30549883
Screening and chromatography of extracts from a terrestrial and a marine-derived streptomycete yielded two new nitrogenous benzene derivatives, namely (S)-N-[3-hydroxy--(4-hydroxyphenyl)-propyl]-acetamide (1a), and (R)-2-(l-methyl-2-oxopropylamino)-benzoic acid (2). Additionally, eight known compounds were....
2.
Vazquez S, Monien P, Pepino Minetti R, Jurgens J, Curtosi A, Villalba Primitz J, et al.
Sci Total Environ
. 2017 Jun;
605-606:26-37.
PMID: 28662428
A diesel spill occurring at Carlini Station (King George Island (Isla 25 de Mayo), South Shetland Islands) in 2009 started the study of the fate of the hydrocarbons and their...
3.
Dame Z, Islam M, Helmke E, von Tiedemann A, Laatsch H
FEMS Microbiol Lett
. 2016 Jun;
363(16).
PMID: 27354061
Four antibiotics (pamamycin, oligomycin A, oligomycin B and echinosporin) were isolated and characterized from the fermentation broth of the marine Streptomyces strains B8496 and B8739. Bioassays revealed that each of...
4.
Nair V, Schuhmann I, Anke H, Kelter G, Fiebig H, Helmke E, et al.
Planta Med
. 2016 Jun;
82(9-10):910-8.
PMID: 27286331
From the gastrointestinal tract of a fish dredged near the South Orkney Islands in Antarctica, we isolated the psychrotolerant bacterial strain T262, which belongs to the species Vibrio splendidus. Investigation...
5.
Abdalla M, Helmke E, Laatsch H
Nat Prod Commun
. 2011 Feb;
5(12):1917-20.
PMID: 21299120
From a marine-derived streptomycete, a new bioactive angucyclinone, fujianmycin C (1), has been isolated along with five known, metabolites fujianmycins A (2) and B (3), ochromycinone (4), ochromycinone methyl ether...
6.
Shaaban K, Helmke E, Kelter G, Fiebig H, Laatsch H
J Antibiot (Tokyo)
. 2010 Nov;
64(2):205-9.
PMID: 21081953
No abstract available.
7.
Hawas U, Shaaban M, Shaaban K, Speitling M, Maier A, Kelter G, et al.
J Nat Prod
. 2009 Nov;
72(12):2120-4.
PMID: 19921834
Chemical screening of the ethyl acetate extract from the marine-derived Streptomyces sp. isolate Mei37 resulted in five isoquinolinequinones, four new derivatives, mansouramycin A-D (1, 3-5), and the known 3-methyl-7-(methylamino)-5,8-isoquinolinedione (2)....
8.
Rahman H, Shaaban M, Shaaban K, Saleem M, Helmke E, Grun-Wollny I, et al.
Nat Prod Commun
. 2009 Sep;
4(7):965-70.
PMID: 19731603
Screening and chromatographic analysis of the extracts from the terrestrial streptomycete GW5127 and from the marine Streptomyces sp. isolate B7967 yielded four new metabolites, i.e. 8-ethyl-6,11-dihydroxy-l1-methoxy-naphthacene-5,12-dione (la), 4-acetyl-1,3-dihydro-imidazo[4,5-c]pyridin-2-one (4a), 5-hydroxmethyl-4-hydroxy-2,4-dimethyl-2-cyclopentenone...
9.
Schuhmann I, Yao C, Al-Zereini W, Anke H, Helmke E, Laatsch H
J Antibiot (Tokyo)
. 2009 Aug;
62(8):453-60.
PMID: 19644517
Twenty-five aromatic nitro, dinitro and trinitro compounds were isolated in low yields of less than 1 mg l(-1) from a Salegentibacter sp. strain T436 derived from Arctic pack ice. Their...
10.
Shaaban K, Shaaban M, Facey P, Fotso S, Frauendorf H, Helmke E, et al.
J Antibiot (Tokyo)
. 2009 Feb;
61(12):736-46.
PMID: 19194032
Chemical investigation of the marine-derived Streptomyces sp. Act8015 led to the isolation of two cyclic peptide antibiotics, piperazimycins A and B (1a, 1b). Their structures were confirmed on the basis...