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- W4375955991 abstract "Multidrug-resistant (MDR) bacteria have become a growing threat to public health. The gram-positive Enterococcus faecium is classified by WHO as a high-priority pathogen among the global priority list of antibiotic-resistant bacteria. Peptidoglycan-degrading enzymes (PDEs), also known as enzybiotics, are useful bactericidal agents in the fight against resistant bacteria. In this work, a genome-based screening approach of the genome of E. faecium allowed the identification of a putative PDE gene with predictive amidase activity (EfAmi1; EC 3.5.1.28) in a prophage-integrated sequence. EfAmi1 is composed by two domains: a N-terminal Zn2+-dependent N-acetylmuramoyl-L-alanine amidase-2 (NALAA-2) domain and a C-terminal domain with unknown structure and function. The full-length gene of EfAmi1 was cloned and expressed as a 6xHis-tagged protein in E. coli. EfAmi1 was produced as a soluble protein, purified, and its lytic and antimicrobial activities were investigated using turbidity reduction and Kirby-Bauer disk-diffusion assays against clinically isolated bacterial pathogens. The crystal structure of the N-terminal amidase-2 domain was determined using X-ray crystallography at 1.97 Å resolution. It adopts a globular fold with several α-helices surrounding a central five-stranded β-sheet. Sequence comparison revealed a cluster of conserved amino acids that defines a putative binding site for a buried zinc ion. The results of the present study suggest that EfAmi1 displays high lytic and antimicrobial activity and may represent a promising new antimicrobial in the post-antibiotic era." @default.
- W4375955991 created "2023-05-10" @default.
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- W4375955991 date "2023-05-08" @default.
- W4375955991 modified "2023-10-18" @default.
- W4375955991 title "Structural and functional features of a broad-spectrum prophage-encoded enzybiotic from Enterococcus faecium" @default.
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- W4375955991 doi "https://doi.org/10.1038/s41598-023-34309-2" @default.
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- W4375955991 hasPublicationYear "2023" @default.
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