Saccharothrix ghardaiensis sp. nov., an actinobacterium isolated from Saharan soil

Abstract

The taxonomic position of a new Saccharothrix strain, designated MB46, isolated from a Saharan soil sample collected in Mzab region (Ghardaïa province, South Algeria) was established following a polyphasic approach. The novel microorganism has morphological and chemical characteristics typical of the members of the genus Saccharothrix and formed a phyletic line at the periphery of the Saccharothrix espanaensis subcluster in the 16S rRNA gene dendrograms. Results of the 16S rRNA gene sequence comparisons revealed that strain MB46 shares high degrees of similarity with S. espanaensis DSM 44229 (99.2%), Saccharothrix variisporea DSM 43911 (98.7%) and Saccharothrix texasensis NRRL B-16134 (98.6%). However, the new strain exhibited only 12.5-17.5% DNA relatedness to the neighbouring Saccharothrix spp. On the basis of phenotypic characteristics, 16S rRNA gene sequence comparisons and DNA-DNA hybridizations, strain MB46 is concluded to represent a novel species of the genus Saccharothrix, for which the name Saccharothrix ghardaiensis sp. nov. (type strain MB46 = DSM 46886 = CECT 9046) is proposed.

Solihabitans fulvus gen. nov., sp. nov., a member of the family Pseudonocardiaceae isolated from soil

“…One siderophore, one melanin, one lanthipeptide, Table 1. Phenotypic characteristics of strain AN110305 T and related species of the family Pseudonocardiaceae Taxa: 1, strain AN110305 T ; 2, Goodfellowiella [21,22]; 3, Umezawaea [53,54]; 4, Kutzneria [55][56][57][58]; 5, Saccharothrix [59][60][61][62][63][64]. Data were from this study unless indicated.…”

Antimicrobial activities of novel bipyridine compounds produced by a new strain of Saccharothrix isolated from Saharan soil

“…The arid soils of the Algerian Sahara have been shown to be rich in members of the Saccharothrix genus (Sabaou et al, 1998, Zitouni et al, 2005) including new species, such as Saccharothrix algeriensis NRRL B-24137 T (Zitouni et al, 2004a), Saccharothrix hoggarensis DSM 45457 T , Saccharothrix saharensis DSM 45456 T , Saccharothrix tamanrassetensis DSM 45947 T (Boubetra et al, 2013a, Boubetra et al, 2013b, Boubetra et al, 2015), Saccharothrix isguenensis DSM 46885 T and Saccharotrix ghardaiensis DSM 46886 T (Bouznada et al, 2016, Bouznada et al, 2017). In addition, many studies have shown the ability of Saccharothrix strains isolated from these soils to produce new or known antibiotics, such as dithiolopyrrolones (Lamari et al, 2002, Bouras et al, 2008, Merrouche et al, 2011), anthracyclines (Zitouni et al, 2004b) and chloramphenicol (Aouiche at al., 2012).…”