Microbacterium proteolyticum sp. nov. isolated from roots of Halimione portulacoides

International Journal of Systematic and Evolutionary Microbiology
Artur AlvesMartha E Trujillo

Abstract

An endophytic actinobacterial strain RZ36T, isolated from roots of the salt-marsh plant Halimione portulacoides, was subjected to a polyphasic taxonomic characterization. 16S rRNA gene sequence analysis revealed that this strain belonged to the genus Microbacterium. The closest phylogenetic relative was Microbacterium hominis DSM 12509T, with a pairwise 16S rRNA gene sequence similarity of 98.8 %. The DNA-DNA hybridization value between strain RZ36T and M. hominis DSM 12509T was 16 %. The affiliation to the genus Microbacterium was corroborated by phenotypic and chemotaxonomic characteristics. The cell-wall peptidoglycan type was B2β and the diagnostic diamino acid was ornithine. Whole-cell sugars detected were galactose, glucose, rhamnose, ribose and xylose. The major fatty acids were anteiso-C15 : 0 and iso-C16 : 0 and the major menaquinone was MK-11 (64 %). Main polar lipids consisted of diphosphatidylglycerol, phosphatidylglycerol and two unknown glycolipids. The genomic DNA G+C content was 69.7 mol%. Thus, on the basis of phenotypic, genotypic and chemotaxonomic data, strain RZ36T is considered to represent a novel species of the genus Microbacterium, for which the name Microbacterium proteolyticum sp. nov. (type strain RZ...Continue Reading

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Citations

Apr 19, 2016·Standards in Genomic Sciences·Linda HadjadjFadi Bittar
Feb 21, 2018·International Journal of Systematic and Evolutionary Microbiology·Praveen RahiYogesh S Shouche
Feb 9, 2017·Antonie van Leeuwenhoek·Jun-Lian GaoJian-Guang Sun
Jul 5, 2017·The Journal of Microbiology·Tuan Manh Nguyen, Jaisoo Kim

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Bacterial cell walls are made of peptidoglycan (also called murein), which is made from polysaccharide chains cross-linked by unusual peptides containing D-amino acids. Here is the latest research on bacterial cell wall structures.

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