DC-52, C18H22N2O4, is a new antitumor antibiotic produced by Streptomyces melanovinaceus nov. sp. The structure of DC-52 has been determined by consideration of spectral data. It has the novel skeleton, 8,11-iminoazepinoisoquinoline.

A new antitumor antibiotic gilvusmycin was isolated from the culture broth of Streptomyces sp. QM16. The structure of gilvusmycin was related to CC-1065 and determined by NMR spectral analysis. Gilvusmycin exhibited antitumor activity against murine leukemia P388 in vivo.

Streptomyces sp. Sge12 was isolated from forest soil and exhibited remarkable antimicrobial activities against selected fungi and Gram-positive bacteria. Here, we report the complete genome sequence of this strain, which contains 37 putative secondary metabolite gene clusters.

Geninthiocin was isolated from the mycelium of Streptomyces sp. DD84 as a tipA promoter inducing substance. Based on various NMR studies, its structure was established as a thiopeptide with oxazole and thiazole moieties, and several unusual amino acids.

A new antibiotic termed zelkovamycin was isolated from the fermentation broth of Streptomyces sp. K96-0670 by solvent extraction, ODS column chromatography and preparative HPLC. Zelkovamycin showed antibacterial activity against Xanthomonas oryzae, Acholeplasma laidlawii, Pyricularia oryzae and Staphylococcus aureus.

S-Adenosyl-L-methionine synthetase (SAM-s) catalyzes the biosynthesis of SAM from ATP and L-methionine. Despite extensive research with many organisms, its role in Streptomyces sp. remains unclear. In the present study, the putative SAM-s gene was isolated from a spectinomycin producer, Streptomyces spectabilis. The purified protein from the transformed Escherichia coli with the isolated gene s...

A contiguous region of about 30 kbp of DNA putatively encoding reactions in daunomycin biosynthesis was isolated from Streptomyces sp. strain C5 DNA. The DNA sequence of an 8.1-kbp EcoRI fragment, which hybridized with actI polyketide synthase (PKS) and actIII polyketide reductase (PKR) gene probes, was determined, revealing seven complete open reading frames (ORFs), two in one cluster and five...

Concanamycin A, a macrolide antibiotic inhibitor of vacuolar H+-ATPase derived from Streptomyces sp, inhibited Plasmodium falciparum K1 growth in culture with an IC500 value of 0.2 nM. It exhibited an additive effect when tested together with the antimalarial pyronaridine.

L-681,176 (1, C12H23N5O7) is an inhibitor of angiotensin converting enzyme produced by Streptomyces sp. MA 5143a. The structure of L-681,176 has been determined by NMR and mass spectral analysis.

The genome sequences of eight Streptomyces phages are presented, four of which were isolated for this study. Phages R4, TG1, Hau3, and SV1 were isolated previously and have been exploited as tools for understanding and genetically manipulating Streptomyces spp. We also extracted five apparently intact prophages from recent Streptomyces spp. genome projects and, together with six phage genomes i...