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  • Title: Chryseobacterium oryzae sp. nov. and Chryseobacterium suipulveris sp. nov., isolated from Andong sikhye and pigpen dust, respectively.
    Author: Heo J, Won M, Lee D, Kim JS, Han BH, Kim SJ, Hong SB, Kwon SW.
    Journal: Int J Syst Evol Microbiol; 2022 Oct; 72(10):. PubMed ID: 36201336.
    Abstract:
    Two Gram-stain-negative, aerobic, mesophilic, rod-shaped bacteria, ADR-1T and SC2-2T, were isolated from Andong sikhye and dust in a pigpen, respectively. The phylogenetic tree on the basis of 16S rRNA gene sequences showed that strains ADR-1T and SC2-2T were members of the genus Chryseobacterium and revealed the highest sequence similarities to Chryseobacterium binzhouense LM2T (97.6 %) and Chryseobacterium koreense Chj707T (94.9 %), respectively. Phylogenomic treeing using 92 core genes clearly indicated that strain ADR-1T clustered with Chryseobacterium echinoideorum CC-CZW010T, Chryseobacterium binzhouense LM2T and Chryseobacterium taihuense CGMCC 1.10941T, and strain SC2-2T formed a compact cluster with Chryseobacterium koreense CCUG 49689T. The digital DNA-DNA hybridization (dDDH) and orthologous average nucleotide identity (ANI) values of strain ADR-1T with the closely related species of the genus Chryseobacterium were ≤24.4 % and ≤80.7 %, and those of strain SC2-2T were ≤24.0 % and ≤77.8 %, respectively, which are well below the cut-off values of species discrimination (>70 % dDDH and >95-96 % ANI). The only respiratory quinone in both strains was menaquinone 6. The polar lipid profile of strain ADR-1T comprised phosphatidylethanolamine, four unidentified aminolipids and three unidentified lipids, while strain SC2-2T contained phosphatidylethanolamine, two unidentified aminolipids, one unidentified aminophospholipid and five unidentified polar lipids. The major fatty acids (>10 %) of strain ADR-1T were iso-C15 : 0, summed feature 9 (iso-C17 : 1  ω9c and/or C16 : 0 10-methyl), iso-C17 : 0 3-OH and summed feature 3 (C16 : 1  ω7c and/or C16 : 1  ω6c), and those of strain SC2-2T were iso-C15 : 0 and anteiso-C15 : 0. On the basis of the results of phenotypic and phylogenetic analyses, strains ADR-1T and SC2-2T represent two distinct novel species in the genus Chryseobacterium, for which the names Chryseobacterium oryzae sp. nov. (type strain ADR-1T=KACC 19311T=NBRC 113104T) and Chryseobacterium suipulveris sp. nov. (type strain SC2-2T=KACC 19313T=NBRC 113106T) are proposed.
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