title: Sulfoxides, Analogues of L-Methionine and L-Cysteine As Pro-Drugs against Gram-Positive and Gram-Negative Bacteria.
abstract: The problem of resistance to antibiotics requires the development of new classes of broad-spectrum antimicrobial drugs. The concept of pro-drugs allows researchers to look for new approaches to obtain effective drugs with improved pharmacokinetic and pharmacodynamic properties. Thiosulfinates, formed enzymatically from amino acid sulfoxides upon crushing cells of genus Allium plants, are known as antimicrobial compounds. The instability and high reactivity of thiosulfinates complicate their use as individual antimicrobial compounds. We propose a pharmacologically complementary pair: an amino acid sulfoxide pro-drug and vitamin B6 - dependent methionine γ-lyase, which metabolizes it in the patient's body. The enzyme catalyzes the γ- and β-elimination reactions of sulfoxides, analogues of L-methionine and L-cysteine, which leads to the formation of thiosulfinates. In the present work, we cloned the enzyme gene from Clostridium sporogenes. Ionic and tautomeric forms of the internal aldimine were determined by lognormal deconvolution of the holoenzyme spectrum and the catalytic parameters of the recombinant enzyme in the γ- and β-elimination reactions of amino acids, and some sulfoxides of amino acids were obtained. For the first time, the possibility of usage of the enzyme for effective conversion of sulfoxides was established and the antimicrobial activity of thiosulfinates against Gram-negative and Gram-positive bacteria in situ was shown.
authors.affiliation: Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, Vavilova Str., 32, Moscow, 119991, Russia.
authors.forename: N V
authors.initials: NV
authors.lastname: Anufrieva
authors.affiliation: Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, Vavilova Str., 32, Moscow, 119991, Russia.
authors.forename: E A
authors.initials: EA
authors.lastname: Morozova
authors.affiliation: Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, Vavilova Str., 32, Moscow, 119991, Russia.
authors.forename: V V
authors.initials: VV
authors.lastname: Kulikova
authors.affiliation: Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, Vavilova Str., 32, Moscow, 119991, Russia.
authors.forename: N P
authors.initials: NP
authors.lastname: Bazhulina
authors.affiliation: State Research Institute of Genetics and Selection of Industrial Microorganisms, 1-st Dorozhniy pr., 1 , Moscow, 117545, Russia.
authors.forename: I V
authors.initials: IV
authors.lastname: Manukhov
authors.affiliation: State Research Institute of Genetics and Selection of Industrial Microorganisms, 1-st Dorozhniy pr., 1 , Moscow, 117545, Russia.
authors.forename: D I
authors.initials: DI
authors.lastname: Degtev
authors.affiliation: State Research Institute of Genetics and Selection of Industrial Microorganisms, 1-st Dorozhniy pr., 1 , Moscow, 117545, Russia.
authors.forename: E Yu
authors.initials: EY
authors.lastname: Gnuchikh
authors.affiliation: Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, Vavilova Str., 32, Moscow, 119991, Russia.
authors.forename: A N
authors.initials: AN
authors.lastname: Rodionov
authors.affiliation: State Research Institute of Genetics and Selection of Industrial Microorganisms, 1-st Dorozhniy pr., 1 , Moscow, 117545, Russia.
authors.forename: G B
authors.initials: GB
authors.lastname: Zavilgelsky
authors.affiliation: Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, Vavilova Str., 32, Moscow, 119991, Russia.
authors.forename: T V
authors.initials: TV
authors.lastname: Demidkina
keywords: Gram-positive and Gram-negative bacteria; Pro-drugs; allicin; alliin; cloning of Clostridium sporogenes methionine γ-lyase gene; sulfoxides of amino acids; vitamin B6-dependent enzymes