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Verrucosispora gifhornensis gen. nov., sp. nov., a new member of the actinobacterial family Micromonosporaceae

¹DSMZ-Deutsche Sammlung von Mikroorganismen und Zellkulturen, D-38124 Braunschweig, Germany
²GBF-Gesellschaft für Biotechnologische Forschung GmbH, Bereich Mikrobiologie, D-38124 Braunschweig, Germany

³Tel: +49 531 2616 352. Fax: +49 531 2616 418. e-mail: erko{at}gbf.de

ABSTRACT

A Gram-positive, aerobic, spore-forming actinomycete strain, HR1-2^T, was isolated from a peat bog near Gifhorn, Lower Saxony, Germany. Comparative analysis of the 16S rDNA sequence indicated that HR1-2^Twas phylogenetically related to members of the family Micromonosporaceae, branching adjacent to Spirilliplanes yamanashiensis, Couchioplanes caeruleus, Catenuloplanes japonicus and members of the genus Micromonospora. The affiliation to the family was supported by the presence of family-specific 16S rDNA signature nucleotides, DNA G+C content of 70 mol%, peptidoglycan of type A1 gM (directly crossed-linked, presence of glycine, alanine, glutamic acid and meso-diaminopimelic acid in the peptide side-chain), menaquinone MK-9(H⁴) as the major respiratory lipoquinone, polar lipid composition Pll (phosphatidylethanolamine, diphosphatidylglycerol, phosphatidylserine and phosphatidylinositolmannosides) and a glycolyl type of muramic acid. It differed from genera of the family by the lack of arabinose in whole-cell sugars and a unique nucleotide signature stretch between positions 1132 and 1143 (Escherichia coli numbering), 5' CAAUUCGGUUG 3'. Morphologically strain HR1-2^Tresembles Micromonospora species but can be distinguished from them by the lack of arabinose in whole-cell sugars, the presence of 10-methyl C_17:0 fatty acids and a distinct 16S rDNA sequence. Based on the unique combination of morphological, chemotaxonomic and phylogenetic properties a new genus, Verrucosispora gen. nov., is proposed. The type species of this genus is Verrucosispora gifhornensis sp. nov., and the type strain of V. gifhornensis is strain HR1-2^T(= DSM 44337^T).

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