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Tetracycline-modifying enzyme SmTetX from Stenotrophomonas maltophilia

Acta Crystallogr F Struct Biol Commun. 2023-07; 
Martin Malý, Petr Kolenko, Jan Stránský, Leona Švecová, Jarmila Dušková, Tomáš Koval', Tereza Skálová, Mária Trundová, Kristýna Adámková, Jiří Černý, Paulína Božíková, Jan Dohnálek
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Proteins, Expression, Isolation and Analysis … a 6×His tag at the N-terminus of the translated protein was synthesized and cloned into the pET-28a(+)-TEV expression vector via NdeI and BamHI restriction sites by GenScript, USA. … Get A Quote

摘要

The resistance of the emerging human pathogen Stenotrophomonas maltophilia to tetracycline antibiotics mainly depends on multidrug efflux pumps and ribosomal protection enzymes. However, the genomes of several strains of this Gram-negative bacterium code for a FAD-dependent monooxygenase (SmTetX) homologous to tetracycline destructases. This protein was recombinantly produced and its structure and function were investigated. Activity assays using SmTetX showed its ability to modify oxytetracycline with a catalytic rate comparable to those of other destructases. SmTetX shares its fold with the tetracycline destructase TetX from Bacteroides thetaiotaomicron; however, its active site possesses an aromatic region t... More

关键词

FAD-dependent monooxygenases, antibiotic resistance, tetracycline