Mechanism of Action of and Mechanism of Reduced Susceptibility to the Novel Anti-Clostridium difficile Compound LFF571

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Published inAntimicrobial Agents and Chemotherapy Vol. 56; no. 8; pp. 4463 - 4465
Main Authors LEEDS, J. A, SACHDEVA, M, MULLIN, S, DZINK-FOX, J, LAMARCHE, M. J
Format Journal Article
LanguageEnglish
Published Washington, DC American Society for Microbiology 01.08.2012
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LFF571 is a novel semisynthetic thiopeptide and potent inhibitor of Gram-positive bacteria. We report that the antibacterial activity of LFF571 against Clostridium difficile is due to inhibition of translation. Single-step mutants of C. difficile with reduced susceptibility to LFF571 were selected at frequencies of <4.5 × 10 −11 to 1.2 × 10 −9 . Sequencing revealed a G260E substitution in the thiopeptide-binding pocket of elongation factor Tu. Importantly, this mutation did not confer cross-resistance to clinically used antimicrobials. These results support the development of LFF571 as a treatment for C. difficile infection.
LFF571 is a novel semisynthetic thiopeptide and potent inhibitor of Gram-positive bacteria. We report that the antibacterial activity of LFF571 against Clostridium difficile is due to inhibition of translation. Single-step mutants of C. difficile with reduced susceptibility to LFF571 were selected at frequencies of <4.5 × 10(-11) to 1.2 × 10(-9). Sequencing revealed a G260E substitution in the thiopeptide-binding pocket of elongation factor Tu. Importantly, this mutation did not confer cross-resistance to clinically used antimicrobials. These results support the development of LFF571 as a treatment for C. difficile infection.
ABSTRACT LFF571 is a novel semisynthetic thiopeptide and potent inhibitor of Gram-positive bacteria. We report that the antibacterial activity of LFF571 against Clostridium difficile is due to inhibition of translation. Single-step mutants of C. difficile with reduced susceptibility to LFF571 were selected at frequencies of <4.5 × 10 −11 to 1.2 × 10 −9 . Sequencing revealed a G260E substitution in the thiopeptide-binding pocket of elongation factor Tu. Importantly, this mutation did not confer cross-resistance to clinically used antimicrobials. These results support the development of LFF571 as a treatment for C. difficile infection.
LFF571 is a novel semisynthetic thiopeptide and potent inhibitor of Gram-positive bacteria. We report that the antibacterial activity of LFF571 against Clostridium difficile is due to inhibition of translation. Single-step mutants of C. difficile with reduced susceptibility to LFF571 were selected at frequencies of <4.5 × 10−11 to 1.2 × 10−9. Sequencing revealed a G260E substitution in the thiopeptide-binding pocket of elongation factor Tu. Importantly, this mutation did not confer cross-resistance to clinically used antimicrobials. These results support the development of LFF571 as a treatment for C. difficile infection.
Author M. J. LaMarche
S. Mullin
J. A. Leeds
M. Sachdeva
J. Dzink-Fox
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Clostridiaceae
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Clostridiales
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SSID ssj0006590
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LFF571 is a novel semisynthetic thiopeptide and potent inhibitor of Gram-positive bacteria. We report that the antibacterial activity of LFF571 against...
ABSTRACT LFF571 is a novel semisynthetic thiopeptide and potent inhibitor of Gram-positive bacteria. We report that the antibacterial activity of LFF571...
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SubjectTerms Anti-Bacterial Agents - chemistry
Anti-Bacterial Agents - pharmacology
Antibiotics. Antiinfectious agents. Antiparasitic agents
Binding Sites - genetics
Biological and medical sciences
Clostridioides difficile - drug effects
Clostridioides difficile - genetics
Clostridium difficile
Drug Resistance, Bacterial - genetics
Enterocolitis, Pseudomembranous - drug therapy
Enterocolitis, Pseudomembranous - microbiology
Experimental Therapeutics
Gastroenterology. Liver. Pancreas. Abdomen
Humans
Medical sciences
Microbial Sensitivity Tests
Other diseases. Semiology
Peptide Chain Elongation, Translational
Peptide Chain Elongation, Translational - drug effects
Peptide Elongation Factor Tu
Peptide Elongation Factor Tu - genetics
Pharmacology. Drug treatments
Protein Structure, Tertiary
Stomach. Duodenum. Small intestine. Colon. Rectum. Anus
Thiazoles
Thiazoles - pharmacology
Title Mechanism of Action of and Mechanism of Reduced Susceptibility to the Novel Anti-Clostridium difficile Compound LFF571
URI http://aac.asm.org/content/56/8/4463.abstract
https://www.ncbi.nlm.nih.gov/pubmed/22644023
https://journals.asm.org/doi/10.1128/AAC.06354-11
https://search.proquest.com/docview/1027834576
https://pubmed.ncbi.nlm.nih.gov/PMC3421628
Volume 56
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