1. A Novel Type V TA System Where mRNA for Toxin GhoT is Cleaved by Antitoxin GhoS
- Author
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Kevin Zheng, Rebecca Page, Viviana Sanchez-Torres, Xiaoxue Wang, Dana M. Lord, Wolfgang Peti, Seok Hoon Hong, Thomas K. Wood, Cecilia Quiroga, Hsin Yao Cheng, Michael J. Benedik, Torsten Herrmann, Devon O. Osbourne, Key Lab Marine Bioresources Sustainable Utilizat, Chinese Academy of Sciences [Beijing] (CAS), Dept Chem Engn, Texas A&M University [College Station], Dept Mol Pharmacol Physiol & Biotechnol, Brown University, Pennsylvania State University (Penn State), Penn State System-Penn State System, Dept Mol Biol Cell Biol & Biochem, ISA - Centre de RMN à très hauts champs, Institut des Sciences Analytiques (ISA), Institut de Chimie du CNRS (INC)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS), Dept Biol, Texas A&M University [College Station]-Texas A&M University System, Dept Biochem & Mol Biol, Pennsylvania Commonwealth System of Higher Education (PCSHE)-Pennsylvania State University (Penn State), US National Institutes of Health (R01 GM089999 ), US National Science Foundation (CAREER award MCB 0952550), and 1000-Youth Elite Program from China.
- Subjects
EXPRESSION ,Protein Conformation ,RNase P ,NMR STRUCTURE DETERMINATION ,Bacterial Toxins ,PROTEIN ,Biology ,medicine.disease_cause ,MULTIDRUG TOLERANCE ,Article ,GhoT/GhoS ,Persistence ,03 medical and health sciences ,[CHIM.ANAL]Chemical Sciences/Analytical chemistry ,medicine ,RNA, Messenger ,Nuclear Magnetic Resonance, Biomolecular ,Molecular Biology ,Escherichia coli ,030304 developmental biology ,Alanine ,0303 health sciences ,Messenger RNA ,Reverse Transcriptase Polymerase Chain Reaction ,030306 microbiology ,Toxin ,Hydrolysis ,BIOFILM FORMATION ,RNA ,GENERAL STRESS-RESPONSE ,Cell Biology ,Toxin-antitoxin system ,Molecular biology ,Toxin/antitoxin ,Biochemistry ,ESCHERICHIA-COLI ,Biofilms ,CELLS ,BACTERIAL PERSISTENCE ,Antitoxins ,Antitoxin ,REGULATOR - Abstract
International audience; Among bacterial toxin-antitoxin systems, to date no antitoxin has been identified that functions by cleaving toxin mRNA. Here we show that YjdO (renamed GhoT) is a membrane lytic peptide that causes ghost cell formation (lysed cells with damaged membranes) and increases persistence (persister cells are tolerant to antibiotics without undergoing genetic change). GhoT is part of a new toxin-antitoxin system with YjdK (renamed GhoS) because in vitro RNA degradation studies, quantitative real-time reverse-transcription PCR and whole-transcriptome studies revealed that GhoS masks GhoT toxicity by cleaving specifically yjdO (ghoT) mRNA. Alanine substitutions showed that Arg28 is important for GhoS activity, and RNA sequencing indicated that the GhoS cleavage site is rich in U and A. The NMR structure of GhoS indicates it is related to the CRISPR-associated-2 RNase, and GhoS is a monomer. Hence, GhoT-GhoS is to our knowledge the first type V toxin-antitoxin system where a protein antitoxin inhibits the toxin by cleaving specifically its mRNA.
- Published
- 2012