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Int J Syst Evol Microbiol 59 (2009), 2036-2041; DOI  10.1099/ijs.0.005561-0
© 2009 International Union of Microbiological Societies

Microbacterium invictum sp. nov., isolated from homemade compost

Ivone Vaz-Moreira1,2, Ana R. Lopes2, Cátia Faria2, Cathrin Spröer3, Peter Schumann3, Olga C. Nunes2 and Célia M. Manaia1

1 Escola Superior de Biotecnologia, Universidade Católica Portuguesa, 4200-072 Porto, Portugal
2 LEPAE – Departamento de Engenharia Química, Faculdade de Engenharia, Universidade do Porto, 4200-465 Porto, Portugal
3 DSMZ – Deutsche Sammlung von Mikroorganismen und Zellkulturen GmbH, Inhoffenstraße 7B, D-38124 Braunschweig, Germany

Correspondence
Célia M. Manaia
cmmanaia{at}esb.ucp.pt

Strain DC-200T was isolated from homemade compost produced from kitchen refuse and characterized using a polyphasic approach. The isolate was a Gram-positive motile short rod, facultatively aerobic, catalase-positive and oxidase-negative, and was able to grow at 10–37 °C, pH 6.0–9.5 and with up to 5 % of NaCl. The peptidoglycan was of the type B1 alpha and the muramic acid residues were glycolylated. The major fatty acids were anteiso-C15 : 0 and anteiso-C17 : 0. The predominant respiratory menaquinones were MK-11 and MK-12. The G+C content of the genomic DNA was 70 mol%. Based on the analysis of the 16S rRNA gene sequence, the closest phylogenetic neighbours of strain DC-200T were Microbacterium lacus A5E-52T (98.7 %) and Microbacterium aoyamense KV-492T (98.2 %). The phenetic characterization of the isolate supports its inclusion within the genus Microbacterium; however, its distinctive phenotypic features and the results from the 16S rRNA gene sequence analysis and the DNA–DNA hybridization study suggest that the isolate represents a novel species. The name Microbacterium invictum sp. nov. is proposed. The type strain is DC-200T (=DSM 19600T=LMG 24557T).

Abbreviations: MALDI-TOF, matrix-assisted laser-desorption/ionization time-of-flight

The GenBank/EMBL/DDBJ accession number for the 16S rRNA gene sequence of strain DC-200T is AM949677.






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