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Micromonospora aurantiaca

ABSTRACT: Common environmental bacterium

PROVIDER: PRJNA37999 | ENA |

REPOSITORIES: ENA

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Dataset's files

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			Action	DRS
		Other
	RIBT01.dat.gz	Other
	RIBT01.fasta.gz	Fasta.gz
	RIBT01.master.dat	Other
	WAAR01.dat.gz	Other

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Three New Isoflavonoid Glycosides from the Mangrove-Derived Actinomycete Micromonospora aurantiaca 110B.

Project description:The mangrove ecosystem is a rich resource for the discovery of actinomycetes with potential applications in pharmaceutical science. Besides the genus Streptomyces, Micromonospora is also a source of new bioactive agents. We screened Micromonospora from the rhizosphere soil of mangrove plants in Fujian province, China, and 51 strains were obtained. Among them, the extracts of 12 isolates inhibited the growth of human lung carcinoma A549 cells. Strain 110B exhibited better cytotoxic activity, and its bioactive constituents were investigated. Consequently, three new isoflavonoid glycosides, daidzein-4'-(2-deoxy-?-l-fucopyranoside) (1), daidzein-7-(2-deoxy-?-l-fucopyranoside) (2), and daidzein-4',7-di-(2-deoxy-?-l-fucopyranoside) (3) were isolated from the fermentation broth of strain 110B. The structures of the new compounds were determined by spectroscopic methods, including 1D and 2D nuclear magnetic resonance (NMR) and high-resolution electrospray ionization mass spectrometry (HR-ESIMS). The result of medium-changing experiments implicated that these new compounds were microbial biotransformation products of strain M. aurantiaca 110B. The three compounds displayed moderate cytotoxic activity to the human lung carcinoma cell line A549, hepatocellular liver carcinoma cell line HepG2, and the human colon tumor cell line HCT116, whereas none of them showed antifungal or antibacterial activities.

| S-EPMC6562861 | biostudies-literature

Novel fatty acid methyl esters from the actinomycete Micromonospora aurantiaca.

Project description:The volatiles released by Micromonospora aurantiaca were collected by means of a closed-loop stripping apparatus (CLSA) and analysed by GC-MS. The headspace extracts contained more than 90 compounds from different classes. Fatty acid methyl esters (FAMEs) comprised the major compound class including saturated unbranched, monomethyl and dimethyl branched FAMEs in diverse structural variants: Unbranched, ?-branched, ?-branched, (?-1)-branched, (?-2)-branched, ?- and (?-1)-branched, ?- and (?-1)-branched, ?- and (?-2)-branched, and ?- and (?-3)-branched FAMEs. FAMEs of the last three types have not been described from natural sources before. The structures for all FAMEs have been suggested based on their mass spectra and on a retention index increment system and verified by the synthesis of key reference compounds. In addition, the structures of two FAMEs, methyl 4,8-dimethyldodecanoate and the ethyl-branched compound methyl 8-ethyl-4-methyldodecanoate were deduced from their mass spectra. Feeding experiments with isotopically labelled [(2)H(10)]leucine, [(2)H(10)]isoleucine, [(2)H(8)]valine, [(2)H(5)]sodium propionate, and [methyl-(2)H(3)]methionine demonstrated that the responsible fatty acid synthase (FAS) can use different branched and unbranched starter units and is able to incorporate methylmalonyl-CoA elongation units for internal methyl branches in various chain positions, while the methyl ester function is derived from S-adenosyl methionine (SAM).

| S-EPMC3252875 | biostudies-other

Pseudomonas putida

Project description:Common environmental bacterium

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Geothrix fermentans

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Micrococcus luteus

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Allosteric regulation of a protein acetyltransferase in Micromonospora aurantiaca by the amino acids cysteine and arginine.

Project description:ACT domains (amino acid-binding domains) are linked to a wide range of metabolic enzymes that are regulated by amino acid concentration. Seventy proteins with ACT-GCN5-related N-acetyltransferase (GNAT) domain organization were found in actinomycetales. In this study, we investigate the ACT-containing GNAT acetyltransferase, Micau_1670 (MaKat), from Micromonospora aurantiaca ATCC 27029. Arginine and cysteine were identified as ligands by monitoring the conformational changes that occur upon amino acids binding to the ACT domain in the MaKat protein using FRET assay. It was found that MaKat is an amino acid-regulated protein acetyltransferase, whereas arginine and cysteine stimulated the activity of MaKat with regard to acetylation of acetyl-CoA synthetase (Micau_0428). Our research reveals the biochemical characterization of a protein acetyltransferase that contains a fusion of a GNAT domain with an ACT domain and provides a novel signaling pathway for regulating cellular protein acetylation. These findings indicate that acetylation of proteins and acetyltransferase activity may be tightly linked to cellular concentrations of some amino acids in actinomycetales.

| S-EPMC4175341 | biostudies-literature

Micromonospora aurantiaca ATCC 27029

Project description:Micromonospora aurantiaca ATCC 27029 Genome sequencing

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Micromonospora aurantiaca strain:ALFB5

Project description:Micromonospora aurantiaca strain:ALFB5 Genome sequencing and assembly

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Micromonospora carbonacea strain:aurantiaca

Project description:Micromonospora carbonacea strain:aurantiaca Genome sequencing

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Micromonospora aurantiaca ATCC 27029

Project description:Micromonospora aurantiaca ATCC 27029 Genome sequencing