R. Masuma

Publications198
h-index31
Citations3,813
Highly Influential Citations97
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Atpenins, potent and specific inhibitors of mitochondrial complex II (succinate-ubiquinone oxidoreductase)
Enzymes in the mitochondrial respiratory chain are involved in various physiological events in addition to their essential role in the production of ATP by oxidative phosphorylation. The use of… Expand
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In vitro and in vivo antimalarial activities of a non-glycosidic 18-membered macrolide antibiotic, borrelidin, against drug-resistant strains of Plasmodia.
Sir: In the course of our screening program to discover antimalarial antibiotics from soil microorganisms which are active against drug-resistant parasites in vitro and in vivo, we previously… Expand
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A new alkaloid AM-2282 OF Streptomyces origin. Taxonomy, fermentation, isolation and preliminary characterization.
AM-2282, a new alkaloid has been isolated from cultures of Streptomyces sp. AM-2282 by solvent extraction and silica gel chromatography. The compound exhibits a strong absorption maximum at 292 nm… Expand
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Materials for the fungus flora of Japan (47)
Albophoma yamanashiensis isolated from a forest soil in Yamanashi Prefecture is described as a new genus belonging to Nectrioidaceae, Coelomycetes.
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Five new Simplicillium species (Cordycipitaceae) from soils in Tokyo, Japan
Eighteen Simplicillium isolates were discovered from soil samples collected on the Honshu, Bonin, and Izu islands in areas under the jurisdiction of Tokyo, Japan. Using a combination of… Expand
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Penicillium viticola, a new species isolated from a grape in Japan
A new monoverticillate Penicillium species (subgenus Aspergilloides Dierckx), Penicillium viticola, was isolated from a grape cultivated in Yamanashi Prefecture, Japan. Morphologically, P. viticola… Expand
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New cyclodepsipeptides, enniatins D, E and F produced by Fusarium sp. FO-1305.
New cyclodepsipeptides named enniatins D, E and F were isolated from the culture broth of Fusarium sp. FO-1305 as inhibitors of acyl-CoA:cholesterol acyltransferase (ACAT). The respective structures… Expand
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Macrosphelide, a novel inhibitor of cell-cell adhesion molecule. I. Taxonomy, fermentation, isolation and biological activities.
Potent anti-adherent activity was detected in fermentation extracts of microbial strain FO-5050. Active compounds designated macrosphelide A and B were isolated and the structure was determined to be… Expand
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Effect of ammonium ion, inorganic phosphate and amino acids on the biosynthesis of protylonolide, a precursor of tylosin aglycone.
The production of tylosin by Streptomyces fradiae KA-427 in a defined medium was inhibited by ammonium ions and by inorganic phosphate. The production of protylonolide, an early lactonic intermediate… Expand
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Purpactins, new inhibitors of acyl-CoA:cholesterol acyltransferase produced by Penicillium purpurogenum. I. Production, isolation and physico-chemical and biological properties.
Penicillium purpurogenum FO-608, a soil isolate, was found to produce a series of new inhibitors of acyl-CoA:cholesterol acyltransferase (ACAT). Three active compounds, designated purpactins, A, B… Expand
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