title: [Spontaneous crystallization of antibiotic substance during submerged fermentation of Actinomyces hygroscopicus].
abstract: A rare case of spontaneous crystallization of the antibiotic substance was detected during submerged cultivation of Actinomyces hygroscopicus, strain 33x, under periodic conditions directly in the MTF 5L3 fermenter ("Marubishi"). Leaf-shaped plates of the antibiotic found in the cultural broth of the strain 33x were active against gram-positive and gram-negative microorganisms, yeasts, and fungi. The crystalline state of the structures was confirmed by the X-ray analysis. According to their UV spectrum (maximum at 233-234 nm in ethanol), the crystals belong to the group of nyphimycin A1-scopafungin, antibiotics produced by some cultures of Act. hygroscopicus.
mesh_terms: D000900:Anti-Bacterial Agents / Q000096:biosynthesis*; D003460:Crystallization; D005285:Fermentation; D013302:Streptomyces / Q000378:metabolism*
chemical_list: D000900:Anti-Bacterial Agents
vernacular_title: O spontannoĭ kristallizatsii antibioticheskogo veshchestva pri glubinnoĭ fermentatsii Actinomyces hydrogscopicus