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  • Title: Actinocrispum wychmicini gen. nov., sp. nov., a novel member of the family Pseudonocardiaceae, isolated from soil.
    Author: Hatano M, Kinoshita N, Igarashi M, Nomoto A.
    Journal: Int J Syst Evol Microbiol; 2016 Nov; 66(11):4779-4784. PubMed ID: 27535579.
    Abstract:
    A novel actinomycete, designated MI503-A4T, was isolated from soil. Comparative analysis of 16S rRNA gene sequences indicated that MI503-A4T was phylogenetically related to members of the family Pseudonocardiaceae. The most closely related genus was Kibdelosporangium (95.7-96.2 % sequence similarity). Substrate mycelia were branched and pale yellow to pale yellowish-brown. Straight- to zigzag-shaped aerial mycelia were observed, but Sporangium-like structures were absent. The whole-cell hydrolysate contained meso-diaminopimelic acid. The muramic acid residues in the peptidoglycan were N-acetylated. Whole-cell sugars were rhamnose, ribose, arabinose and galactose (cell wall chemotype IV). The predominant menaquinone was MK-9(H4). A small amount of MK-8(H4) was also detected. The DNA G+C content was 70.3-71.1 mol%. Polar lipids contained diphosphatidylglycerol, phosphatidylethanolamine and hydroxyl-phosphatidylethanolamine. Cellular fatty acid analysis of MI503-A4T detected predominantly iso-C14 : 0 (11.5 %), iso-C15 : 0 (13.3 %) and iso-C16 : 0 (35.7 %). Phenotypic and phylogenetic characteristics differentiated MI503-A4T from members of all genera within the family Pseudonocardiaceae with validly published names. Therefore, MI503-A4T is proposed to be a representative of a novel species in a novel genus, Actinocrispum wychmicini gen. nov., sp. nov. The type strain of the type species is MI503-A4T (=NBRC 109632T=DSM 45934T).
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