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RESEARCH PRODUCT
Pyrrolomycins as antimicrobial agents. Microwave-assisted organic synthesis and insights into their antimicrobial mechanism of action
T. FaddettaMaria Grazia CusimanoMery La FrancaSimona CollinaDomenico SchillaciGiampaolo BaroneRoberta ListroAinars LeonchiksGiuseppe GalloMaria Valeria Raimondisubject
Staphylococcus aureusClinical BiochemistryPharmaceutical ScienceMicrobial Sensitivity Testsmedicine.disease_causeSettore BIO/19 - Microbiologia Generale01 natural sciencesBiochemistrychemistry.chemical_compoundBacterial ProteinsDrug DiscoverymedicinePyrrolesEnzyme InhibitorsMicrowavesMolecular BiologyEnzyme Assays010405 organic chemistryChemistryOrganic ChemistryBiofilmN-Acetylmuramoyl-L-alanine AmidaseAntimicrobialAminoacyltransferasesAntimicrobial resistance Pyrrolomycins Sortase A Staphylococcus aureus In-silico docking studies MAOS Pharmacokinetics studies Murein hydrolase activitySettore CHIM/08 - Chimica Farmaceutica0104 chemical sciencesAnti-Bacterial AgentsMolecular Docking Simulation010404 medicinal & biomolecular chemistryCysteine EndopeptidasesBiochemistryMechanism of actionDocking (molecular)Staphylococcus aureusSettore CHIM/03 - Chimica Generale E InorganicaSortase ABiofilmsPseudomonas aeruginosaMolecular MedicineOrganic synthesisPeptidoglycanmedicine.symptomdescription
Abstract New compounds able to counteract staphylococcal biofilm formation are needed. In this study we investigate the mechanism of action of pyrrolomycins, whose potential as antimicrobial agents has been demonstrated. We performed a new efficient and easy method to use microwave organic synthesis suitable for obtaining pyrrolomycins in good yields and in suitable amount for their in vitro in-depth investigation. We evaluate the inhibitory activity towards Sortase A (SrtA), a transpeptidase responsible for covalent anchoring in Gram-positive peptidoglycan of many surface proteins involved in adhesion and in biofilm formation. All compounds show a good inhibitory activity toward SrtA, having IC50 values ranging from 130 to 300 µM comparable to berberine hydrochloride. Of note compound 1d shows a good affinity in docking experiment to SrtA and exhibits the highest capability to interfere with biofilm formation of S. aureus showing an IC50 of 3.4 nM. This compound is also effective in altering S. aureus murein hydrolase activity that is known to be responsible for degradation, turnover, and maturation of bacterial peptidoglycan and involved in the initial stages of S. aureus biofilm formation.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2019-03-01 |