Candidate bacterial phylum CSP1-3 has not been cultivated and is poorly understood. Here, we analyzed 112 CSP1-3 metagenome-assembled genomes and showed they are likely facultative anaerobes, with 3 of 5 families encoding autotrophy through the reductive glycine pathway (RGP), Wood-Ljungdahl pathway (WLP) or Calvin-Benson-Bassham (CBB), with hydrogen or sulfide as electron donors. Chemoautotrophic enrichments from hot spring sediments and fluorescence hybridization revealed enrichment of six CSP1-3 genera, and both transcribed genes and DNA-stable isotope probing were consistent with proposed chemoautotrophic metabolisms.
View Article and Find Full Text PDFInt J Syst Evol Microbiol
February 2023
A novel anaerobic bacterium, designated SYSU GA19001, was isolated from a hot spring sediment sample. Phylogenetic analysis indicated that the isolate belongs to the genus , and showed the highest sequence similarity to CICC 10730 (96.63 %) and PYR-10 (96.
View Article and Find Full Text PDFAnaerobic ammonium oxidation (anammox) is an important process of the nitrogen cycle, and the anammox bacteria have been studied in a wide variety of environments. However, the distribution, diversity, and abundance of anammox bacteria in hot springs remain enigmatic. In this study, the anammox process was firstly investigated in hot springs of Conghua, China.
View Article and Find Full Text PDFStrain SZY PN-1, representing a novel Gram-negative, aerobic, non-motile, rod-shaped and yellow-pigmented bacterium, was isolated from a skin sample of a healthy Chinese male. Growth occurred at pH 6.0-8.
View Article and Find Full Text PDFOne thermophilic bacterium, designated strain SYSU G02662, was isolated from hot spring sediment sampled in Tibet, PR China. Polyphasic taxonomic analyses and whole-genome sequencing were used to determine the taxonomy position of the strain. Phylogenetic analysis using 16S rRNA gene sequences indicated that strain SYSU G02662 showed the highest sequence similarity to SCSIO 58843 (95.
View Article and Find Full Text PDFTwo bacterial strains SYSU G02173 and SYSU G03142 were isolated from hot springs in Tibet, China. Based on the results of nearly full-length 16S rRNA gene sequences and phylogenetic analyses, strains SYSU G02173 and SYSU G03142 were assigned to the family Sphingosinicellaceae, and were closest to Sandaracinobacter sibiricus RB16-17 (96.04% and 96.
View Article and Find Full Text PDFInt J Syst Evol Microbiol
November 2020
Two anaerobic bacteria, designated strains SYSU GA16112 and SYSU GA16107, were isolated from a hot spring in Tengchong County, Yunnan Province, south-west PR China. Phylogenetic analyses based on 16S rRNA gene sequences showed that strains SYSU GA16112 and SYSU GA16107 belong to the family . Cells of strains SYSU GA16112 and SYSU GA16107 were Gram-stain-negative, rod-shaped and non-motile.
View Article and Find Full Text PDFLignocellulose is considered a major source of renewable energy that serve as an alternative to the fossil fuels. Members of the genus Clostridium are some of the many microorganisms that have the ability to degrade lignocellulose efficiently to sugar, which can be further converted to biofuel. In this study, we isolated twelve Clostridium strains from hot spring samples of Yunnan and Tibet, of which isolates SYSU GA15002 and SYSU GA17076 showed low 16S rRNA gene sequence identity profiles to any of the validly named Clostridium strains (<94.
View Article and Find Full Text PDFFour strains (SYSU SYW-1, SYW-2, SYW-3 and XLW-1) were isolated from seawater near the shore in Guangdong Province, China. Cells were Gram-stain-negative, aerobic, non-motile and non-spore-forming. Growth was observed at a temperature range of 16-40 °C (optimum, 32 °C), a pH range of 4-8 (optimum, pH 7) and in the presence of up to 10 % (w/v) NaCl.
View Article and Find Full Text PDFAntonie Van Leeuwenhoek
August 2020
Two novel Gram-stain negative, moderately thermophilic, aerobic, rod-shaped strains, designated 3D203 and 3D207, were isolated from hot spring sediment samples collected from Tibet, western China. Phylogenetic analyses based on 16S rRNA gene sequence similarities showed that two isolates belonged to the genus Microvirga and were most closely related to Microvirga makkahensis SV1470 (98.5% and 98.
View Article and Find Full Text PDFThe perplexity of the complex multispecies community interactions is one of the many reasons why majority of the microorganisms are still uncultivated. We analyzed the entire co-occurrence networks between the OTUs of Tibet and Yunnan hot spring samples, and found that less abundant OTUs such as genus Tepidimonas (relative abundant <1%) had high-degree centricity (key nodes), while dominant OTUs particularly genus Chloroflexus (relative abundant, 13.9%) formed the peripheral vertexes.
View Article and Find Full Text PDFInt J Syst Evol Microbiol
April 2020
A novel thermotolerant bacterial strain was isolated from a hot spring in a Tibetan geothermal field. Phylogenetic analysis of the 16S rRNA gene sequence of the novel strain showed that it belongs to a distinct lineage far from any known taxa. The new isolate shared the highest pairwise sequence identity with S-12 (92.
View Article and Find Full Text PDFA thermophilic bacterium, designated SYSU G03088, was isolated from Moincer hot spring, Tibet, PR China. Polyphasic taxonomic analyses and whole-genome sequencing were used to determine the taxonomic position and genomic profiles of the strain. Phylogenetic analysis using 16S rRNA gene sequence indicated that SYSU G03088 showed highest sequence similarity to CGMCC 1.
View Article and Find Full Text PDFIn our search for novel anaerobes with potential carbohydrate polymers degrading activity, we have isolated a xylan-degrading bacterial strain SYSU GA17129 from an anammox bacteria dominant wastewater treatment plant. Phylogenetic analysis of the 16S rRNA gene sequence indicated the strain SYSU GA17129 belong to the order Clostridiales and shared highest sequence identity with Caldicoprobacter faecalis DSM 20678 (89.9%).
View Article and Find Full Text PDFThis paper reports the design and fabrication of a planar chip for high-throughput cell trapping and pairing (more than 2400 single cell-cell pairs in a microwell array) in a 1 × 1.5 cm area by positive dielectrophoresis (p-DEP) within only several minutes. The p-DEP was generated by applying an alternating current signal on a novel two-pair interdigitated array (TPIDA) electrode.
View Article and Find Full Text PDF