Journal of Microbiology

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Descr!ption of Ornithinimicrobium cryptoxanthini sp. nov., a Novel Actinomycete Producing β‑cryptoxanthin Isolated from the Tongtian River Sediments: Yuyuan Huang , Yifan Jiao , Sihui Zhang , Yuanmeihui Tao , Suping Zhang , Dong Jin , Ji Pu , Liyun Liu , Jing Yang , Shan Lu; J. Microbiol. 2023;61(4):379-388. Published online March 16, 2023; DOI: https://doi.org/10.1007/s12275-023-00029-5

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Two novel Gram-stain-positive, aerobic, non-motile, and yellow-pigmented, irregular rod-shaped bacteria (JY.X269 and JY.X270T) were isolated from the near-surface sediments of river in Qinghai Province, P. R. China (32°37′13″N, 96°05′37″E) in July 2019. Both strains were shown to grow at 15–35 °C and pH 7.0–10.0, and in the presence of 0–6.0% (w/v) NaCl. The 16S rRNA gene sequence analysis showed that the isolates were closely related to Ornithinimicrobium cavernae CFH 30183 T (98.6–98.8% 16S rRNA gene sequence similarity), O. ciconiae H23M54T (98.5–98.6%) and O. murale 01-Gi-040T (98.3–98.5%). The phylogenetic and phylogenomic trees based on the 16S rRNA gene and 537 core gene sequences, respectively, revealed that the two strains formed a distinct cluster with the above three species. The digital DNA-DNA hybridization (dDDH) and average nucleotide identity (ANI) values between our two isolates (JY.X269 and JY.X270T) and other Ornithinimicrobium species were within the ranges of 19.0–23.9% and 70.8–80.4%, respectively, all below the respective recommended 70.0% and 95–96% cutoff point. Furthermore, the major cellular fatty acids (> 10.0%) of strains JY.X269 and JY.X270T were iso-C15:0, iso-C16:0, and summed feature 9. Strain JY.X270T contained MK-8(H4) and ornithine as the predominant menaquinone and diagnostic diamino acid component within the cell wall teichoic acids. β-cryptoxanthin ( C40H56O) can be extracted from strain JY.X270T, and its content is 6.3 μg/ml. Based on results from the phylogenetic, chemotaxonomic, and phenotypic analyses, the two strains could be classified as a novel species of the genus Ornithinimicrobium, for which the name Ornithinimicrobium cryptoxanthini sp. nov. is proposed (type strain JY.X270T = CGMCC 1.19147T = JCM 34882T).

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Microbacterium jiangjiandongii sp. nov. and Microbacterium wangruii sp. nov., two β-cryptoxanthin-producing bacteria isolated from intestinal contents of Marmota himalayana
Lin Ye, Xiaorui Liu, Jing Yang, Ji Pu, Caixin Yang, Gui Zhang, Juan Zhou, Yue Liu, Dong Jin, Shan Lu, Jianguo Xu
International Journal of Systematic and Evolutionary Microbiology .2025;[Epub] CrossRef
Screening, identification, and characterization of high potential bacteria for ꞵ-cryptoxanthin production from natural sources
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Biocatalysis and Agricultural Biotechnology.2024; 57: 103089. CrossRef

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