A new aminoglycoside antibiotic complex--the seldomycins. II. Isolation, physicochemical and chromatographic properties

An antibiotic complex consisting of four components, seldomycin factors 1, 2, 3 and 5 was isolated from the fermentation broth of Streptomyces hofunensis sp. nov. by use of a cationic exchange resin. After silica gel column chromatography, the purified components were characterized as new aminoglycoside antibiotics by their physicochemical, chromatographic and antimicrobial properties.

A new aminoglycoside antibiotic complex--the seldomycins. I. Taxonomy, fermentation and antibacterial properties

A soil isolate named Streptomyces hofunensis sp. nov. was found to produce seldomycin factors 1, 2, 3 and 5, new aminoglycoside antibiotics. Taxonomy of the producing organism, a study of cultural conditions for seldomycin production, and antibacterial activity of seldomycins are reported. Seldomycin factor 5 was the most active both in vitro and in vivo against gram-positive and negative bacteria.

A new antibiotic XK-90 I. Taxonomy of the producing organism, fermentation, isolation and physicochemical and biological properties

A new antibiotic XK-90 is produced by Streptomyces sp. MK-90 and is active against Gram-positive and Gram-negative bacteria. The taxonomy of the organism, fermentation, isolation and physiochemical and biological properties are described.

Platomycins A and B II. Physicochemical properties

Platomycins A and B, two new antibacterial and antitumor antibiotics were found to belong to the phleomycin-bleomycin family, being closely related to bleomycins B. The two ahtibiotics have been differentiated from all of the reported phleomycins and bleomycins.

Platomycins A and B I Taxonomy of the producing strain and production, isolation and biological properties of platomycins

Two new antibiotics, platomycins A and B, belonging to the phleomycin-bleomycin family, were isolated from the culture filtrate of Streptosporangium sp. MK-78. This strain has been identified as a new variety of Streptosporangium violaceochromogenes. Both platomycins A and B are active against a variety of Gram-positive and Gram-negative bacteria, and also inhibit solid Sarcoma 180 and Ehrlich ascites carcinoma.

A new antibiotic victomycin (XK 49-1-B-2). I. Taxonomy and production of the producing organism

A new antibiotic designated as victomycin which belongs to the phleomycin-bleomycin group antibiotics was isolated from a sporangia-forming actinomycete. From taxonomic studies, the producing strain was classified as Streptosporangium violaceochromogenes nov., sp. Kawamoto et Nara 1974. Fermentative production of antibiotic complex XK 49 is described.

A new antibiotic victomycin (XK 49-1-B-2). II. Isolation, purification and physicochemical and biological properties

A new antibiotic, victomycin, is active against a variety of Gram-positive and Gram-negative bacteria, and also has in vivo activity against solid Sarcoma 180 and Ehrlich ascites carcinoma. It belongs to the phleomycin-bleomycin group of antibiotics and has been differentiated from all known phleomycins and bleomycins by its physicochemical properties and thin-layer chromatograms.

New antibiotic XK-62-2 (sagamicin). II Taxonomy of the producing organism, fermentative production and characterization of sagamicin

Cultures of Micromonospora species, strains MK 65 and MK 62, were found to produce a new antibiotic XK-62-2 (Sagamicin). Antibacterial and paperchromatographic data on an eluate from IRC50 treatment of fermentation beers indicated that XK62-2 is a new antibiotic with broad spectrum, basic, and water-soluble properties, probably closely related to the gentamicin C group of antibiotics.