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Zimmermannella helvola gen. nov., sp. nov., Zimmermannella alba sp. nov., Zimmermannella bifida sp. nov., Zimmermannella faecalis sp. nov. and Leucobacter albus sp. nov., novel members of the family Microbacteriaceae

¹ Laboratory of Bioresources, Institute of Molecular and Cellular Biosciences, The University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo 113-0032, Japan
² DADB, Service de Microbiologie, Hôpital Louis-Pasteur, Hôpitaux Civils, 68024 Colmar, France
³ Thailand Institute of Scientific and Technological Research (TISTR), 196 Phahonyothin Road, Chatuchak, Bangkok 10900, Thailand

Correspondence
Yi-Chueh Lin
yilin{at}genes.nig.ac.jp

Seven strains of actinobacteria, isolated from soil, wounds, urine, cow faeces, human blood and butter, were characterized by a polyphasic approach to clarify their taxonomic position. On the basis of chemotaxonomy, 16S rRNA gene analysis and DNA relatedness, strain IAM 14851^T can be classified within the cluster of the genus Leucobacter and is proposed as a novel species, Leucobacter albus sp. nov., with strain IAM 14851^T (=TISTR 1515^T) as the type strain. The other six strains formed a phylogenetically separate branch in the family Microbacteriaceae, having the following characteristics: the major menaquinones are MK-8 to MK-10, the DNA G+C content ranges from 62 to 68 mol%, the diamino acid in the cell wall is diaminobutyric acid and the muramic acid in the peptidoglycan is of the acetyl type. The major fatty acids are 12-methyltetradecanoic acid (anteiso-C_{15 : 0}), hexadecanoic acid (C_{16 : 0}), 14-methyl-pentadecanoic acid (iso-C_{16 : 0}) and 14-methyl-hexadecanoic acid (anteiso-C_{17 : 0}). On the basis of morphological, physiological and chemotaxonomic characteristics, together with DNA–DNA hybridization and 16S rRNA gene sequence comparison, the novel genus Zimmermannella gen. nov. is proposed for these six strains. Four novel species are proposed: Zimmermannella helvola sp. nov. (type species; type strain IAM 14726^T=NBRC 15775^T=DSM 20419^T=TISTR 1509^T), Zimmermannella alba sp. nov. (type strain IAM 14724^T=NBRC 15616^T=TISTR 1510^T), Zimmermannella bifida sp. nov. (type strain IAM 14848^T=TISTR 1511^T) and Zimmermannella faecalis sp. nov. (type strain IAM 15030^T=NBRC 15706^T=ATCC 13722^T=TISTR 1514^T).

Published online ahead of print on 16 April 2004 as DOI 10.1099/ijs.0.02741-0.

The GenBank/EMBL/DDBJ accession numbers for the 16S rRNA gene sequences determined in this study are given in Fig. 2.

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