Oleksandr Gromyko

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A 3 kb DNA fragment from the Streptomyces globisporus 1912 landomycin E (LaE) biosynthetic gene cluster (lnd) was completely sequenced. Three open reading frames were identified, lndGT4, lndZ4, and lndZ5, whose probable translation products resemble a glycosyltransferase, a reductase, and a hydroxylase, respectively. Studies of generated mutants from(More)
The identification of BRCA1/2 and CHEK2 germline mutations is central to the molecular diagnostics of susceptibility to breast or/and ovarian cancer. A microarray-based rapid genotyping technique has been developed for identifying BRCA1 (185delAG, 300T>G, 4153delA, 5382insC, and 4158 A>G, 5382insC), BRCA2 (695insT and 6174delT), and CHEK2 (1100delC)(More)
Mobilizable shuttle plasmids containing the origin of transfer (oriT) region of plasmid F (IncFI), ColIb-P9 (IncI1), and RP4/RP1 (IncPalpha) were constructed to test the ability of the cognate conjugation system to mediate gene transfer from Escherichia coli to Streptomyces. The conjugative system of the IncPalpha plasmids was shown to be most effective in(More)
A new linear polyketide, juniperolide A (1), was produced by the terrestrial actinomycete (Lv1-48) isolated from the rhizosphere of the plant Juniperus excelsa. The juniperolide A (1) structure contains a THP unit and a 3-amino-2,3,6-trideoxyhexose as the glycosidic moiety. Mosher's analysis was used for absolute stereochemistry determinations at C-2, C-8,(More)
Landomycin E (LaE) overproducing strain Streptomyces globisporus SMY6222 has been developed using UV induced mutagenesis and selection for streptomycin resistance. SMY622 has been shown by HPLC to produce 200-fold higher amounts of LaE when comparing with parental strain. The levels of transcription of regulatory gene lndI and oxygenase gene lndE are two(More)
The purpose of this study was to investigate informativety and clinical significance of most frequent somatic alterations in K-ras, TP53, CDKN2A, MADH4 and more uncommon mutations in BRCA1, BRCA2, CHEK2 genes, which arise on preinvasive stage in sporadic pancreatic adenocarcinomas (PA), in Russian patients. We examined surgically resected and manually(More)
Chemical analysis of a terrestrial-derived Streptomyces sp. Lv20-195 cultivated from the root zone of Olea europea yielded oleaceran, 1, possessing a novel spiro[isobenzofuran-1,2'-naptho[1,8-b,c]furan] carbon skeleton. The structure of 1 was determined by detailed spectroscopic analysis.
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