actinomycosis/tyrosine

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Image screening for maxillo-mandibular actinomycosis with CT, 18F-FDG-PET/CT, and 18F-α-methyl tyrosine PET/CT.

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Clinical features and imaging findings of maxillo-mandibular actinomycosis are similar to those of intraosseous carcinoma. The purpose of this study is to clarify the characteristics of the imaging findings for screening of maxillo-mandibular actinomycosis using CT and

Biosynthesis of l-Phenylalanine and l-Tyrosine in the Actinomycete Amycolatopsis methanolica.

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Auxotrophic mutants of the actinomycete Amycolatopsis methanolica requiring l-Phe or l-Tyr were isolated and identified as strains lacking prephenate dehydratase (strain GH71) or arogenate dehydrogenase (strain GH70), respectively. A. methanolica thus employs single pathways only for the

[Effect of tyrosine stereoisomers on the formation of melanin-like pigments by actinomycetes].

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Characterization of two new aromatic amino acid lyases from actinomycetes for highly efficient production of p-coumaric acid.

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p-Coumaric acid (p-CA) is a bioactive natural product and an important industrial material for pharmaceuticals and nutraceuticals. It can be synthesized from deamination of L-tyrosine by tyrosine ammonia lyase (TAL). In this work, we discovered two aromatic amino acid lyase genes, Sas-tal and

Cloning and characterization of a novel tyrosine ammonia lyase-encoding gene involved in bagremycins biosynthesis in Streptomyces sp.

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Tyrosine ammonia lyase catalyzes the deamination of L: -tyrosine to trans-coumaric acid. A novel tyrosine ammonia lyase-encoding gene, bagA, was cloned and sequenced from bagremycins-producing strain Streptomyces sp. Tü 4128 whose protein product contains a Ala-Ser-Gly segment in the active site.

A scheme for the identification of thermophilic actinomycetes associated with hypersensitivity pneumonitis.

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A scheme has been developed for the identification of thermophilic actinomycetes associated with hypersensitivity pneumonitis. Eighty strains, 10 Micropolyspora faeni, 6 Saccharomonospora viridis, 52 Thermoactinomyces candidus, 7 T. vulgaris, 4 T. sacchari, and 1 T. dichotomica, either isolated from

Contributions of conserved serine and tyrosine residues to catalysis, ligand binding, and cofactor processing in the active site of tyrosine ammonia lyase.

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Tyrosine ammonia lyase (TAL) catalyzes the conversion of L-tyrosine to p-coumaric acid using a 3,5-dihydro-5-methylidene-4H-imidazole-4-one (MIO) prosthetic group. In bacteria, TAL is used for production of the photoactive yellow protein chromophore and for caffeic acid biosynthesis in certain

Tyrosine derivatives isolated from Streptomyces sp. IFM 10937 in a screening program for TRAIL-resistance-overcoming activity.

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Exploration of actinomycetes for isolation of natural products for abrogating TRAIL resistance led to the isolation of two new tyrosine derivatives (1 and 2) along with novobiocin (3). The structures of 1 and 2 were determined by spectroscopic methods, while the absolute configuration was determined

Production of alkaline protease from an alkaliphilic actinomycete.

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The repression of alkaline protease synthesis from alkaliphilic actinomycete was studied by using glucose, peptone, yeast extract, KH2PO4 and amino acids; tyrosine, tryptophan, lysine, and arginine. There was a critical limit of stimulation of enzyme production by these components. Crude components

Simplified approach to identification of aerobic actinomycetes by thin-layer chromatography.

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A system has been developed for the identification of aerobic actinomycetes in the clinical laboratory based on analysis of whole cells for diaminopimelic acid and carbohydrates and on the ability of the organism to decompose casein, tyrosine, and xanthine media. The whole-cell analyses were

Genes and enzymes involved in caffeic acid biosynthesis in the actinomycete Saccharothrix espanaensis.

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The saccharomicins A and B, produced by the actinomycete Saccharothrix espanaensis, are oligosaccharide antibiotics. They consist of 17 monosaccharide units and the unique aglycon N-(m,p-dihydroxycinnamoyl)taurine. To investigate candidate genes responsible for the formation of

One-pot synthesis of genistein from tyrosine by coincubation of genetically engineered Escherichia coli and Saccharomyces cerevisiae cells.

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For production of genistein from N-acetylcysteamine-attached p-coumarate (p-coumaroyl-NAC) supplemented to the medium, a chalcone synthase (CHS) gene from Glycyrrhiza echinata, a chalcone isomerase (CHI) gene from Pueraria lobata, and an isoflavone synthase (IFS) gene from G. echinata were placed

Actinomycetes for marine drug discovery isolated from mangrove soils and plants in China.

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The mangrove ecosystem is a largely unexplored source for actinomycetes with the potential to produce biologically active secondary metabolites. Consequently, we set out to isolate, characterize and screen actinomycetes from soil and plant material collected from eight mangrove sites in China. Over

Examination of mechanism of N-acetyl-1-D-myo-inosityl-2-amino-2-deoxy-α-D-glucopyranoside deacetylase (MshB) reveals unexpected role for dynamic tyrosine.

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Actinomycetes are a group of gram-positive bacteria that includes pathogenic mycobacterial species, such as Mycobacterium tuberculosis. These organisms do not have glutathione and instead utilize the small molecule mycothiol (MSH) as their primary reducing agent and for the detoxification of

Interkingdom pharmacology of Angiotensin-I converting enzyme inhibitor phosphonates produced by actinomycetes.

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The K-26 family of bacterial secondary metabolites are N-modified tripeptides terminated by an unusual phosphonate analog of tyrosine. These natural products, produced via three different actinomycetales, are potent inhibitors of human angiotensin-I converting enzyme (ACE). Herein we investigate the

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