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Updated: Feb 19, 2026

Quantification of Violacein in Chromobacterium violaceum and Its Inhibition by Bioactive Compounds
Published on: August 8, 2025
Saccharothrix violaceirubra sp. nov., isolated from soil and plant litter
Misa Otoguro1, Tomohiko Tamura, Ken-Ichiro Suzuki
1NITE Biological Resource Center (NBRC), Department of Biotechnology, National Institute of Technology and Evaluation (NITE), 2-5-8 Kazusakamatari, Kisarazu, Chiba 292-0818, Japan. otoguro-misa@nite.go.jp
Abstract:
Two strains of nocardioform actinomycetes, isolated from soil and plant litter in Yamanashi prefecture, Japan, showed substrate mycelium with purple to dark-red colours. 16S rRNA gene sequence analysis indicated that the organisms belonged to the family Actinosynnemataceae and were related closely to Saccharothrix strains (96.7-98.0 % sequence similarity). The isolates contained MK-9(H(4)) as the predominant menaquinone, meso-diaminopimelic acid, galactose as the diagnostic whole-cell sugar and phosphatidylethanolamine as the predominant polar lipid. Based on a combination of cultural, physiological and chemotaxonomic properties, in addition to the phylogenetic analysis and DNA-DNA hybridization data, we propose a novel species, Saccharothrix violaceirubra sp. nov., for these strains, with the type strain YU 692-1(T) (=NBRC 102064(T) =KCTC 19326(T)).
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