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| 论文摘要： | A Gram-stain-negative, flocculating strain A-14T was isolated from the Wuhan wastewater treatment plant. Phylogenetic analysis based on 16S rRNA gene sequence showed that strain A-14T was most closely related to the family Weeksellaceae and, among genera, was most closely related to genus Daejeonia (Daejeonia ginsenosidivorans NP5T, 95.54% 16S rRNA gene sequence similarity). The orthologous average nucleotide identity, average amino acid identity, and digital DNA-DNA hybridization values between A-14T and other species within the families Weeksellaceae and Flavobacteriaceae were 62.2-66.4%, 70.2-72.5%, and 18.0-34.7%, respectively. The growth temperature range was 10-40 degrees C (optimum 37 degrees C) and the pH ranged from 5.0 to 8.5 (optimum pH 7.0). The optimum NaCl concentration required for growth was 1% (w/v). Genomic G + C content was 40.9%. Chemotaxonomic analysis of strain A-14T showed that the major respiratory quinone was MK-6, the predominant cellular fatty acids (more than 10% of total fatty acids) were iso-C15:0, anteiso-C15:0, and iso-C17:0 3-OH, and the main polar lipids were phosphatidylethanolamine (PE), aminolipid (AL), and two unknown polar lipids. The functional analysis of the genome revealed potential genes associated with polyphosphate metabolism, suggesting the strain's capacity for polyphosphate accumulation. This suggests that the strain might be of potential value for the treatment of phosphorus-contaminated wastewater. Based on evidence from phenotypic, chemotaxonomic, and phylogenetic studies, the newly isolated strain A-14T represents a novel genus within the family Weeksellaceae, for which the name Wuhapuella caenivorax gen. nov., sp.nov. is proposed. The type strain is A-14T (= MCCC 1K08965T = KCTC 102291T). |
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