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Taxonomic re-evaluation of ‘Nocardiopsis’ sp K-252^T (= NRRL 15532^T): a proposal to transfer this strain to the genus Nonomuraea as Nonomuraea longicatena sp. nov.

¹ Technical Research Laboratories, Kyowa Hakko Kogyo Co., Ltd, 1–1 Kyowa-cho, Hofu-shi, Yamaguchi 747-8522, Japan
² Tokyo Research Laboratories, Kyowa Hakko Kogyo Co., Ltd, Tokyo 194-8533, Japan

Author for correspondence: Shigeru Chiba. Tel: +81 835 22 2518. Fax: +81 835 22 2466. e-mail: shigeru.chiba{at}kyowa.co.jp

ABSTRACT

Re-evaluation of the taxonomic position of strain K-252^T, which produces the compound K-252a, showed that the strain does not belong to the genus Nocardiopsis suggested previously. Strain K-252^T formed aerial mycelia with long spore chains, and hyphal fragmentation was not observed. The cell wall chemotype of the strain was lll/B, the major menaquinone was MK-9 (III, VIII-H₄), the phospholipid pattern was PIV and the major cellular fatty acids were 10Me-C_17:0, iso-C_16:0 and C_16:0. Phylogenetic analysis of the 16S rRNA sequence showed that strain K-252^T was clustered in the Nonomuraea group. Furthermore, on the basis of DNA-DNA reassociation and phenotypic data, strain K-252^T (= NRRL 15532^T) was classified as a new species of the genus Nonomuraea. This strain is proposed as Nonomuraea longicatena sp. nov.

Key Words: Nonomuraea longicatena sp. nov. • Nocardiopsis • K-252a • protein kinase C inhibitor

The GenBank/EMBL/DDBJ accession number for the almost complete 16S rDNA sequence (1499 nucleotides) of strain K-252^T is AB018787.

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