Dataset Information

Dokdolipids A-C, Hydroxylated Rhamnolipids from the Marine-Derived Actinomycete Actinoalloteichus hymeniacidonis.

ABSTRACT: Three new hydroxylated rhamnolipids, dokdolipids A-C (1-3) were obtained from the marine actinomycete Actinoalloteichus hymeniacidonis, which was isolated from a sediment sample collected off the coasts of Dokdo island, Republic of Korea. The structures of the isolated compounds were elucidated on the basis of 1D and 2D NMR and mass spectrometric data analyses. Their absolute configurations were assigned using the modified Mosher's method and specific rotation values, as well as acid hydrolysis, chemical derivatizations and subsequent HPLC analysis to determine the configuration of the sugar moieties. All new compounds were evaluated for their cytotoxicity against six cancer cell lines, HCT-15, NUGC-3, NCI-H23, ACHN, PC-3 and MDA-MB-231. Compounds 1-3 displayed moderate cytotoxicity against all the cell lines tested with IC50 values ranging from 13.7-41.5 µM.

SUBMITTER: Choi BK

PROVIDER: S-EPMC6521253 | biostudies-literature | 2019 Apr

REPOSITORIES: biostudies-literature

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Dokdolipids A-C, Hydroxylated Rhamnolipids from the Marine-Derived Actinomycete Actinoalloteichus hymeniacidonis.

Choi Byeoung-Kyu BK Lee Hwa-Sun HS Kang Jong Soon JS Shin Hee Jae HJ

Marine drugs 20190420 4

Three new hydroxylated rhamnolipids, dokdolipids A-C (1-3) were obtained from the marine actinomycete Actinoalloteichus hymeniacidonis, which was isolated from a sediment sample collected off the coasts of Dokdo island, Republic of Korea. The structures of the isolated compounds were elucidated on the basis of 1D and 2D NMR and mass spectrometric data analyses. Their absolute configurations were assigned using the modified Mosher's method and specific rotation values, as wel ...[more]

PMID: 31010028

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Project description:ObjectiveTo investigate the cytotoxic activity of actinomycete isolated from marine sediment.MethodsIn the present study the DNA was isolated and the ITS region of 16s rRNA was amplified by polymerase chain reaction, using two universal bacterial primers, 1492R (5'-GGTTACCTTGTTAC GACTT-3') and Eubac27F (5'-AGAGTTTGATCCTGGCTC AG-3'). The amplified products were purified using TIANgel mini purification kit, ligated to MD18-T simple vector (TaKaRa), and transformed into competent cells of Escherichia coli DH5α. 16S rRNA gene fragment was sequenced using forward primer M13F (-47) and reverse primer M13R (-48). Blast search sequence similarity was found against the existing non-redundant nucleotide sequence database thus, identified as Streptomyces sp SU, Streptomyces rubralavandulae strain SU1, Streptomyces cacaoi strain SU2, Streptomyces cavourensis strain SU3, Streptomyces avidinii strain SU4, Streptomyces globisporus strain SU5, Streptomyces variabilis strain SU6, Streptomyces coelicolor strain SU 7. Among the eight identified isolates, one actinomycete Streptomyces avidinii strain SU4 was selected for further study.ResultsCrude extract of the actinomycete isolate exhibited IC50 in 64.5 µg against Hep-2 cell line, 250 µg in VERO cell line. This value is very close to the criteria of cytotoxicity activity for the crude extracts, as established by the American National Cancer Institute (NCI) is in IC50 < 30 µg/mL. The GC MS analysis showed that the active principle might be 1,2-benzenedicarboxylic acid, bis(2-methylpropyl) ester (12.17%), isooctyl phthalate (15.29%) with the retention time 15.642 and 21.612, respectively.ConclusionsThis study clearly proves that the marine sediment derived actinomycetes with bioactive metabolites can be expected to provide high quality biological material for high throughout biochemical and anticancer screening programs. These results help us to conclude that the potential of using metabolic engineering and post genomic approaches to isolate more bioactive compounds and make their possible commercial application is not far off.

Dataset Information

Dokdolipids A-C, Hydroxylated Rhamnolipids from the Marine-Derived Actinomycete Actinoalloteichus hymeniacidonis.

Publications

Dokdolipids A-C, Hydroxylated Rhamnolipids from the Marine-Derived Actinomycete <i>Actinoalloteichus hymeniacidonis</i>.

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