Functional screening of antibiotic resistance genes from human gut microbiota reveals a novel gene fusion
(0) The human gut microbiota has a high density of bacteria that are considered a reservoir for antibiotic resistance genes (ARGs).In this study, one fosmid metagenomic library generated from the gut microbiota of four healthy humans was used to screen for ARGs against seven antibiotics.Eight new ARGs were obtained: one against amoxicillin, six against D-cycloserine, and one against kanamycin.The new amoxicillin resistance gene encodes a protein with 53% identity to a class D β-lactamase from Riemerella anatipestifer RA-GD.The six new D-cycloserine resistance genes encode proteins with 73-81% identity to known D-alanine-D-alanine ligases.The new kanamycin resistance gene encodes a protein of 274 amino acids with an N-terminus (amino acids 1-189) that has 42% identity to the 6-aminoglycoside acetyltransferase AAC(6) from Enterococcus hirae and a C-terminus (amino acids 190-274) with 35% identity to a hypothetical protein from Clostridiales sp.SSC/2.A functional study on the novel kanamycin resistance gene showed that only the N-terminus conferred kanamycin resistance.Our results showed that functional metagenomics is a useful tool for the identification of new ARGs.
metagenomics antibiotic resistance gut microbiology
Gong Cheng Yongfei Hu Yeshi Yin Xi Yang Chunsheng Xiang Baohong Wang Yanfei Chen Fengling Yang Fang Lei Na Wu Na Lu Jing Li Quanze Chen Lanjuan Li Baoli Zhu
Microbial Genome Research Center, CAS Key Laboratory of Pathogenic Microbiology and Immunology, Inst Microbial Genome Research Center, CAS Key Laboratory of Pathogenic Microbiology and Immunology, Inst State Key Laboratory for Diagnosis and Treatment of Infectious Disease, First Affiliated Hospital, C
国际会议
北京
英文
67-72
2018-03-29（万方平台首次上网日期，不代表论文的发表时间）