Objective A core genome multilocus sequence typing(cgMLST)scheme to genotype and identify potential risk clonal groups(CGs)in Proteus mirabilis.Methods In this work,we propose a publicly available cgMLST scheme for P....Objective A core genome multilocus sequence typing(cgMLST)scheme to genotype and identify potential risk clonal groups(CGs)in Proteus mirabilis.Methods In this work,we propose a publicly available cgMLST scheme for P.mirabilis using chew BBACA.In total 72 complete P.mirabilis genomes,representing the diversity of this species,were used to set up a cgMLST scheme targeting 1,842 genes,635 unfinished(contig,chromosome,and scaffold)genomes were used for its validation.Results We identified a total of 205 CGs from 695 P.mirabilis strains with regional distribution characteristics.Of these,159 unique CGs were distributed in 16 countries.CG20 and CG3 carried large numbers of shared and unique antibiotic resistance genes.Nine virulence genes(papC,papD,papE,papF,papG,papH,papI,papJ,and papK)related to the P fimbrial operon that cause severe urinary tract infections were only found in CG20.These CGs require attention due to potential risks.Conclusion This research innovatively performs high-resolution molecular typing of P.mirabilis using whole-genome sequencing technology combined with a bioinformatics pipeline(chewBBACA).We found that the CGs of P.mirabilis showed regional distribution differences.We expect that our research will contribute to the establishment of cgMLST for P.mirabilis.展开更多
The TDDFT method is first applied in a series of tetra-nuclear transition metal clusters studies for nonlinear optical properties. The results indicate that the charge transfer inside the metal core [MCu3X4] (M=W, Mo...The TDDFT method is first applied in a series of tetra-nuclear transition metal clusters studies for nonlinear optical properties. The results indicate that the charge transfer inside the metal core [MCu3X4] (M=W, Mo; X=S, O, Cl, Se, Br) makes contribution to the optical nonlinearity. It is possible to enhance the hyperpolarizability by substituting the ligands of the clusters.展开更多
基金supported by grants from the National Natural Science Foundation of China[82073624]Military Biosafety Research Special Project[20SWAQX04]Independent Project[Grant No.2017ZZKTB03]。
文摘Objective A core genome multilocus sequence typing(cgMLST)scheme to genotype and identify potential risk clonal groups(CGs)in Proteus mirabilis.Methods In this work,we propose a publicly available cgMLST scheme for P.mirabilis using chew BBACA.In total 72 complete P.mirabilis genomes,representing the diversity of this species,were used to set up a cgMLST scheme targeting 1,842 genes,635 unfinished(contig,chromosome,and scaffold)genomes were used for its validation.Results We identified a total of 205 CGs from 695 P.mirabilis strains with regional distribution characteristics.Of these,159 unique CGs were distributed in 16 countries.CG20 and CG3 carried large numbers of shared and unique antibiotic resistance genes.Nine virulence genes(papC,papD,papE,papF,papG,papH,papI,papJ,and papK)related to the P fimbrial operon that cause severe urinary tract infections were only found in CG20.These CGs require attention due to potential risks.Conclusion This research innovatively performs high-resolution molecular typing of P.mirabilis using whole-genome sequencing technology combined with a bioinformatics pipeline(chewBBACA).We found that the CGs of P.mirabilis showed regional distribution differences.We expect that our research will contribute to the establishment of cgMLST for P.mirabilis.
文摘The TDDFT method is first applied in a series of tetra-nuclear transition metal clusters studies for nonlinear optical properties. The results indicate that the charge transfer inside the metal core [MCu3X4] (M=W, Mo; X=S, O, Cl, Se, Br) makes contribution to the optical nonlinearity. It is possible to enhance the hyperpolarizability by substituting the ligands of the clusters.
