title: Excretion of a phosphorus-containing carbohydrate by Streptomyces sp. A50.
abstract: A new phosphorus-containing compound (1) was detected by (31)P NMR spectroscopy in Streptomyces sp. A50. Compound 1, 1(alpha)-O-methyl-2-(N-acetyl)glucoseamine-6-O-phosphate-1(alpha)-2-(N-acetyl)glucosamine, exhibited a pK(a) value around zero. The compound was found both in the extracellular culture broth and in the cells. While very low concentrations of 1 were found in the culture broth of other species of Streptomyces, its presence in high concentrations was specific to Streptomyces sp. A50. The highly acidic compound was isolated from the broth, and its structure was elucidated by a combination of 1D-, 2D-homonuclear, and inverse heteronuclear NMR techniques and mass spectroscopy.
authors.affiliation: School of Chemistry, Raymond and Beverly Sackler Faculty of Exact Sciences, Tel Aviv University, Ramat Aviv, 69978, Israel.
authors.forename: D
authors.initials: D
authors.lastname: Ben-Bashat
authors.forename: Y
authors.initials: Y
authors.lastname: Meller
authors.forename: Y
authors.initials: Y
authors.lastname: Aharonowitz
authors.forename: D
authors.initials: D
authors.lastname: Gutnick
authors.forename: S
authors.initials: S
authors.lastname: Carmeli
authors.forename: G
authors.initials: G
authors.lastname: Navon
mesh_terms: D000117:Acetylglucosamine / Q000031:analogs & derivatives / Q000032:analysis / Q000737:chemistry* / Q000378:metabolism*; D019298:Glucose-6-Phosphate / Q000031:analogs & derivatives / Q000032:analysis / Q000737:chemistry* / Q000378:metabolism*; D013058:Mass Spectrometry; D015394:Molecular Structure; D019906:Nuclear Magnetic Resonance, Biomolecular; D010758:Phosphorus / Q000737:chemistry / Q000378:metabolism; D013302:Streptomyces / Q000378:metabolism*
chemical_list: C445940:1-O-methyl-2-(N-acetyl)glucoseamine-6-O-phosphate-1-2-(N-acetyl)glucosamine; D010758:Phosphorus; D019298:Glucose-6-Phosphate; D000117:Acetylglucosamine