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dc.contributor.authorÜnal, Can Murat
dc.contributor.authorKaragöz, Mustafa Safa
dc.contributor.authorBerges, Mareike
dc.contributor.authorPriebe, Christina
dc.contributor.authorBorrero de Acuña, José Manuel
dc.contributor.authorWissing, Josef
dc.contributor.authorJänsch, Lothar
dc.contributor.authorJahn, Dieter
dc.contributor.authorSteinert, Michael
dc.date.accessioned2019-06-14T09:48:48Z
dc.date.available2019-06-14T09:48:48Z
dc.date.issued2019-01-01
dc.identifier.citationFront Pharmacol. 2019 Apr 5;10:340. doi: 10.3389/fphar.2019.00340. eCollection 2019.en_US
dc.identifier.issn1663-9812
dc.identifier.pmid31024308
dc.identifier.doi10.3389/fphar.2019.00340
dc.identifier.urihttp://hdl.handle.net/10033/621818
dc.description.abstractThe Gram-positive pathogen Clostridioides difficile is the main bacterial agent of nosocomial antibiotic associated diarrhea. Bacterial peptidyl-prolyl-cis/trans-isomerases (PPIases) are well established modulators of virulence that influence the outcome of human pathologies during infections. Here, we present the first interactomic network of the sole cyclophilin-type PPIase of C. difficile (CdPpiB) and show that it has diverse interaction partners including major enzymes of the amino acid-dependent energy (LdhA, EtfAB, Had, Acd) and the glucose-derived (Fba, GapA, Pfo, Pyk, Pyc) central metabolism. Proteins of the general (UspA), oxidative (Rbr1,2,3, Dsr), alkaline (YloU, YphY) and cold shock (CspB) response were found bound to CdPpiB. The transcriptional (Lrp), translational (InfC, RFF) and folding (GroS, DnaK) control proteins were also found attached. For a crucial enzyme of cysteine metabolism, O-acetylserine sulfhydrylase (CysK), the global transcription regulator Lrp and the flagellar subunit FliC, these interactions were independently confirmed using a bacterial two hybrid system. The active site residues F50, F109, and F110 of CdPpiB were shown to be important for the interaction with the residue P87 of Lrp. CysK activity after heat denaturation was restored by interaction with CdPpiB. In accordance, tolerance toward cell wall stress caused by the exposure to amoxicillin was reduced. In the absence of CdPpiB, C. difficile was more susceptible toward L-cysteine. At the same time, the cysteine-mediated suppression of toxin production ceased resulting in higher cytotoxicity. In summary, the cyclophilin-type PPIase of C. difficile (CdPpiB) coordinates major cellular processes via its interaction with major regulators of transcription, translation, protein folding, stress response and the central metabolism.en_US
dc.language.isoenen_US
dc.publisherFrontiersen_US
dc.rightsAttribution-NonCommercial-ShareAlike 4.0 International*
dc.rights.urihttp://creativecommons.org/licenses/by-nc-sa/4.0/*
dc.subjectClostridium difficileen_US
dc.subjectcytotoxicityen_US
dc.subjectinteractomicsen_US
dc.subjectpeptidyl-prolyl-cis/trans-isomerase (PPIase)en_US
dc.subjecttranscriptionen_US
dc.titlePleiotropic Cyclophilin PpiB Controls Cysteine-Tolerance, Toxin Production, the Central Metabolism and Multiple Stress Responses.en_US
dc.typeArticleen_US
dc.contributor.departmentHZI,Helmholtz-Zentrum für Infektionsforschung GmbH, Inhoffenstr. 7,38124 Braunschweig, Germany.en_US
dc.identifier.journalFrontiers in pharmacologyen_US
refterms.dateFOA2019-06-14T09:48:49Z
dc.source.journaltitleFrontiers in pharmacology


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