Exploring the Diversity and Antibacterial Potentiality of Cultivable Actinobacteria from the Soil of the Saxaul Forest in Southern Gobi Desert in Mongolia.

Saxaul () is the most widespread plant community in the Gobi Desert in Mongolia, which plays important roles in wind control, sand fixation and water conservation. Investigations of soil-derived actinobacteria inhabiting in the saxaul forest in Gobi Desert in Mongolia have been scarce. In this study, biodiversity of culturable actinobacteria isolated from soil of the saxaul forest in Southern Gobi Aimak (Southern Gobi Province) of Mongolia was characterized and their potential to produce compounds with antibacterial activities was assessed.

Metabolomics Tools Assisting Classic Screening Methods in Discovering New Antibiotics from Mangrove Actinomycetia in Leizhou Peninsula.

Mangrove actinomycetia are considered one of the promising sources for discovering novel biologically active compounds. Traditional bioactivity- and/or taxonomy-based methods are inefficient and usually result in the re-discovery of known metabolites. Thus, improving selection efficiency among strain candidates is of interest especially in the early stage of the antibiotic discovery program.

sp. nov., a halotolerant actinobacterium isolated from the Lake Gudzhirganskoe.

A Gram-stain-positive, aerobic, non-motile, non-spore-forming and coccus-shaped strain, designated strain G463, was isolated from the rhizosphere soil of L. collected from Lake Gudzhirganskoe in Siberia. Based on 16S rRNA gene phylogeny, strain G463 belonged to the genus , with the highest 16S rRNA gene sequence similarity to DSM 45258 (96.

sp. nov., a novel endophytic actinobacterium isolated from branch of .

A Gram-stain-positive, aerobic, non-motile, non-endospore-forming and rod-shaped actinobacterium, designated strain CMS6Z-2, was isolated from a surface-sterilized branch of collected from the Maowei Sea, Guangxi Zhuang Autonomous Region, PR China. Strain CMS6Z-2 grew at 10-37 °C (optimum, 37 °C), pH 6.0-9.

Butyribacter intestini gen. nov., sp. nov., a butyric acid-producing bacterium of the family Lachnospiraceae isolated from human faeces, and reclassification of Acetivibrio ethanolgignens as Acetanaerobacter ethanolgignens gen. nov., comb. nov.

A novel, non-motile, Gram-stain-positive, non-spore-forming, obligate anaerobic bacterium, designated strain TF01-11, was isolated from human faeces. The isolate was characterized by phylogenetic and phenotypic properties, as well as by determination of its whole genome sequence. The growth temperature and pH ranges were 30-42 °C and 6.

Taxonomic Description and Genome Sequence of sp. nov., a Novel Cholesterol-Lowering Bacterium Isolated From Human Gut.

A Gram-staining-negative, non-spore-forming, short, straight rod, non-motile, and obligate anaerobic bacterial strain, AF73-05CM02, was isolated from a fecal sample of a 30 years old healthy male living in Shenzhen, China. Colonies were approximately 0.2 mm in diameter, beige, and circular after 4 days of incubation on PYG agar under anaerobic conditions at 37°C.

Motilibacter deserti sp. nov. and Motilibacter aurantiacus sp. nov., two novel actinobacteria isolated from soil of Cholistan Desert and emended description of the genus Motilibacter.

Two novel actinobacterial strains, designated as E257 and K478, were isolated from hyper-arid soil samples collected in Cholistan Desert, Pakistan. Comparative analysis of 16S rRNA genes showed that strains E257 and K478 were assigned to the genus Motilibacter, being their closest relative M. rhizosphaerae RS-16 with 97.

Beilunmycin, a new virginiamycins antibiotic from mangrove-derived sp. 2BBP-J2 and the antibacterial activity by inhibiting protein translation.

One new virginiamycin derivative, 'beilunmycin' (), and three known virginiamycin antibiotics, 16-hydroxy-virginiamycin M1 (), virginiamycin M2 (), and virginiamycin M1 (), were isolated from the culture of a mangrove-derived endophytic sp. 2BBP-J2. The structures were characterized on the basis of their spectroscopic data, and the absolute configuration of was established by ECD calculations.

sp. nov., a novel actinobacterium isolated from Cholistan desert soil.

A Gram-stain-positive, aerobic, catalase-positive, oxidase-negative, non-mycelium-forming, motile, rod-shaped with one polar flagellum actinobacterium, designated E918, was isolated from a desert soil collected in Cholistan desert, Pakistan. Phylogenetic analysis based on 16S rRNA gene sequences revealed that strain E918 belonged to the genus and was most closely related to CGMCC 1.15091 (97.

sp. nov., isolated from rhizosphere soil of .

A psychrotolerant actinobacterium, designated strain J5903, was isolated from an alkaline soil sample from the rhizosphere of collected in desertification land surrounding Jiuliancheng Nur in Hebei Province, PR China. Cells of the isolate were Gram-stain-positive, aerobic, non-motile and non-spore-forming cocci. Strain J5903 grew optimally at 20‒25 °C, at pH 7.

sp. nov., isolated from a saline-alkaline soil.

A novel moderately halophilic, filamentous actinobacterium, designated as XMNu-373, was isolated from a saline-alkaline soil sample collected from the Mongolia Plateau, Dongwu County, Inner Mongolia Autonomous Region, PR China. The isolate grew optimally at 28‒37 °C, pH 7.0‒8.

sp. nov., an actinomycete isolated from soil of the Cholistan Desert, and emended description of the genus .

A Gram-stain-positive, aerobic, non-motile and non-spore-forming actinobacterium, designated as F435, was isolated from soil sample collected from the Cholistan Desert, Pakistan. The taxonomic position of the strain was established by using a polyphasic taxonomic approach. The cells were coccoid-shaped and found in single or arrangement of pairs.

sp. nov., an actinobacterium isolated from steppe soil.

A novel actinobacterial strain, designated 18, was isolated from a steppe soil sample collected in Buryatia, Russia and subjected to polyphasic taxonomic characterization. The strain was aerobic and Gram-stain-positive. The 16S rRNA gene sequence of strain 18 exhibited highest similarity to CPCC 204357 (97.

sp. nov., an actinobacterium isolated from sand of the Taklamakan desert, and emended description of the genus .

A novel actinobacterium, designated strain 16Sb5-5, was isolated from a sand sample collected in the Taklamakan desert in Xinjiang Uygur Autonomous Region, China. The strain was examined by a polyphasic approach to clarify its taxonomic position. Cells of the isolate were Gram-staining-positive, aerobic, non-motile and short-rod shaped.

sp. nov., isolated from Taklamakan desert soil.

A Gram-stain-positive, aerobic, non-motile, rod-shaped actinobacterium, designated strain 21Sc5-5, was isolated from a soil sample collected in the Taklamakan desert in Xinjiang Uygur Autonomous Region, PR China and investigated by using a polyphasic approach. Strain 21Sc5-5 grew at 10-37 °C (optimum, 28-30 °C), pH 6.0-9.

Labedella phragmitis sp. nov. and Labedella populi sp. nov., two endophytic actinobacteria isolated from plants in the Taklamakan Desert and emended description of the genus Labedella.

Two novel strains, designated 11W25H-1 and 8H24J-4-2, were isolated from surface-sterilized plant tissues collected from the Taklamakan Desert in the Xinjiang Uygur Autonomous Region, China. The strains were characterized by a polyphasic approach in order to clarify their taxonomic positions. They were Gram-stain positive, aerobic, non-motile, non-spore-forming and rod-shaped.

Aeromicrobium endophyticum sp. nov., an endophytic actinobacterium isolated from reed (Phragmites australis).

A Gram-staining-positive, motile and short-rod-shaped actinobacterium designated 9W16Y-2 was isolated from surface-sterilized leaves of reed (Phragmites australis) collected from Taklamakan Desert in Xinjiang Uygur Autonomous Region, China. Colonies were pale greenish yellow, circular, smooth, and convex. The 16S rRNA gene sequence of strain 9W16Y-2 exhibited highest sequence similarities with Aeromicrobium camelliae CGMCC 1.

Kocuria soli sp. nov., an actinobacterium isolated from soil.

A Gram-stain-positive, aerobic, coccoid-shaped, non-spore-forming actinobacterial strain, designated M5W7-7, was isolated from a hot spring soil sample collected from Anshan, Liaoning province, PR China. Phylogenetic analysis based on 16S rRNA gene sequences revealed that strain M5W7-7 clustered closely with species of the genus Kocuria, and showed the highest sequence similarity of 97.1 % to Kocuria subflava YIM 13062.

Marmoricola mangrovicus sp. nov., an endophytic actinobacterium isolated from Kandelia candel.

A Gram-stain-positive, aerobic, motile, non-spore-forming and rod-shaped actinobacterium, designated strain 4Q3S-7, was isolated from a piece of surface-sterilized bark of Kandelia candel collected at the Cotai Ecological Zone in Macao, China. Colonies were yellowish white, circular, smooth and convex. The 16S rRNA gene sequence of strain 4Q3S-7 exhibited highest similarities to Marmoricola ginsengisoli Gsoil 097 (97.

Amnibacterium flavum sp. nov., a novel endophytic actinobacterium isolated from bark of Nerium indicum Mill.

A Gram-stain-positive, aerobic, short-rod-shaped, non-spore-forming actinobacterial strain, designated M8JJ-5, was isolated from a surface-sterilized bark of Neriumindicum Mill. collected from Guizhou, China, and investigated by a polyphasic approach to determine its taxonomic position. Strain M8JJ-5 grew optimally without NaCl at 28 °C and at pH 7.