GRAS Notice (GRN) No.859, 2'-Fucosyllactose
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The Food Poisoning Toxins of Bacillus Cereus
toxins Review The Food Poisoning Toxins of Bacillus cereus Richard Dietrich 1,†, Nadja Jessberger 1,*,†, Monika Ehling-Schulz 2 , Erwin Märtlbauer 1 and Per Einar Granum 3 1 Department of Veterinary Sciences, Faculty of Veterinary Medicine, Ludwig Maximilian University of Munich, Schönleutnerstr. 8, 85764 Oberschleißheim, Germany; [email protected] (R.D.); [email protected] (E.M.) 2 Department of Pathobiology, Functional Microbiology, Institute of Microbiology, University of Veterinary Medicine Vienna, 1210 Vienna, Austria; [email protected] 3 Department of Food Safety and Infection Biology, Faculty of Veterinary Medicine, Norwegian University of Life Sciences, P.O. Box 5003 NMBU, 1432 Ås, Norway; [email protected] * Correspondence: [email protected] † These authors have contributed equally to this work. Abstract: Bacillus cereus is a ubiquitous soil bacterium responsible for two types of food-associated gastrointestinal diseases. While the emetic type, a food intoxication, manifests in nausea and vomiting, food infections with enteropathogenic strains cause diarrhea and abdominal pain. Causative toxins are the cyclic dodecadepsipeptide cereulide, and the proteinaceous enterotoxins hemolysin BL (Hbl), nonhemolytic enterotoxin (Nhe) and cytotoxin K (CytK), respectively. This review covers the current knowledge on distribution and genetic organization of the toxin genes, as well as mechanisms of enterotoxin gene regulation and toxin secretion. In this context, the exceptionally high variability of toxin production between single strains is highlighted. In addition, the mode of action of the pore-forming enterotoxins and their effect on target cells is described in detail. The main focus of this review are the two tripartite enterotoxin complexes Hbl and Nhe, but the latest findings on cereulide and CytK are also presented, as well as methods for toxin detection, and the contribution of further putative virulence factors to the diarrheal disease. -
Serine Proteases with Altered Sensitivity to Activity-Modulating
(19) & (11) EP 2 045 321 A2 (12) EUROPEAN PATENT APPLICATION (43) Date of publication: (51) Int Cl.: 08.04.2009 Bulletin 2009/15 C12N 9/00 (2006.01) C12N 15/00 (2006.01) C12Q 1/37 (2006.01) (21) Application number: 09150549.5 (22) Date of filing: 26.05.2006 (84) Designated Contracting States: • Haupts, Ulrich AT BE BG CH CY CZ DE DK EE ES FI FR GB GR 51519 Odenthal (DE) HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI • Coco, Wayne SK TR 50737 Köln (DE) •Tebbe, Jan (30) Priority: 27.05.2005 EP 05104543 50733 Köln (DE) • Votsmeier, Christian (62) Document number(s) of the earlier application(s) in 50259 Pulheim (DE) accordance with Art. 76 EPC: • Scheidig, Andreas 06763303.2 / 1 883 696 50823 Köln (DE) (71) Applicant: Direvo Biotech AG (74) Representative: von Kreisler Selting Werner 50829 Köln (DE) Patentanwälte P.O. Box 10 22 41 (72) Inventors: 50462 Köln (DE) • Koltermann, André 82057 Icking (DE) Remarks: • Kettling, Ulrich This application was filed on 14-01-2009 as a 81477 München (DE) divisional application to the application mentioned under INID code 62. (54) Serine proteases with altered sensitivity to activity-modulating substances (57) The present invention provides variants of ser- screening of the library in the presence of one or several ine proteases of the S1 class with altered sensitivity to activity-modulating substances, selection of variants with one or more activity-modulating substances. A method altered sensitivity to one or several activity-modulating for the generation of such proteases is disclosed, com- substances and isolation of those polynucleotide se- prising the provision of a protease library encoding poly- quences that encode for the selected variants. -
Identification of Mrna As Biomarker of Bacillus Weihenstephanensis Acid Resistance : Toward the Integration of Omic Data Into Predictive Microbiology Noemie Desriac
Identification of mRNA as biomarker of Bacillus weihenstephanensis acid resistance : toward the integration of Omic data into predictive microbiology Noemie Desriac To cite this version: Noemie Desriac. Identification of mRNA as biomarker of Bacillus weihenstephanensis acid resistance : toward the integration of Omic data into predictive microbiology. Microbiology and Parasitology. Université de Bretagne occidentale - Brest, 2013. English. NNT : 2013BRES0096. tel-02152918 HAL Id: tel-02152918 https://tel.archives-ouvertes.fr/tel-02152918 Submitted on 11 Jun 2019 HAL is a multi-disciplinary open access L’archive ouverte pluridisciplinaire HAL, est archive for the deposit and dissemination of sci- destinée au dépôt et à la diffusion de documents entific research documents, whether they are pub- scientifiques de niveau recherche, publiés ou non, lished or not. The documents may come from émanant des établissements d’enseignement et de teaching and research institutions in France or recherche français ou étrangers, des laboratoires abroad, or from public or private research centers. publics ou privés. présentée par THÈSE / UNIVERSITÉ DE BRETAGNE OCCIDENTALE sous le sceau de l’Université européenne de Bretagne Noémie DESRIAC pour obtenir le titre de Préparée à ADRIA Développement et au DOCTEUR DE L’UNIVERSITÉ DE BRETAGNE OCCIDENTALE Laboratoire Universitaire de Biodiversité et Mention : Microbiologie Alimentaire d'Ecologie Microbienne École Doctorale SICMA Thèse soutenue le 04 Juillet 2013 Identification d’ARNm devant le jury composé de : -
Doktorarbeit 120304Docx
TECHNISCHE UNIVERSITÄT MÜNCHEN Lehrstuhl für Biofunktionalität der Lebensmittel Mechanistic impact of Enterococcus faecalis metalloprotease on bacterial virulence in the context of chronic intestinal inflammation Natalie Marie Annabel Steck Vollständiger Abdruck der von der Fakultät Wissenschaftszentrum Weihenstephan für Ernährung, Landnutzung und Umwelt der Technischen Universität München zur Erlangung des akademischen Grades eines Doktors der Naturwissenschaften genehmigten Dissertation. Vorsitzender: Univ.-Prof. Dr. M. Schemann Prüfer der Dissertation: 1. Univ.-Prof. Dr. D. Haller 2. Univ.-Prof. Dr. R.F. Vogel Die Dissertation wurde am 17.11.2011 bei der Technischen Universität München eingereicht und durch die Fakultät Wissenschaftszentrum Weihenstephan für Ernährung, Landnutzung und Umwelt am 06.02.2012 angenommen. Für meine Familie und Freunde PUBLICATIONS AND PRESENTATIONS PUBLICATIONS AND PRESENTATIONS Peer-reviewed original manuscripts and reviews Steck N*, Mueller K*, Schemann M and Haller D. Bacterial proteases in IBD and IBS. Gut, 2011 (*authors equally contributed to the manuscript) Steck N , Hoffmann M, Sava IG, Kim SC, Hahne H, Tonkonogy SL, Mair K, Krueger D, Pruteanu M, Shanahan F, Vogelmann R, Schemann M, Kuster B, Sartor RB and Haller D. Enterococcus faecalis Metalloprotease Compromises Epithelial Barrier and Contributes to Intestinal Inflammation. Gastroenterology, 2011 Sep;141(3):959-71. Published abstracts Steck N , Hoffmann M, Hew Ferstl CM, Kim SC, Tonkonogy SL, Vogel RF, Sartor RB, Haller D. E. faecalis Gelatinase contributes to the development of intestinal inflammation by impairing epithelial barrier function: Role for bacteria-derived proteases in the pathology of IBD. Journal of Crohn's and Colitis Supplements - April 2010, Vol. 4, Issue 1, Pages 22-23 Steck N , Hoffmann M, Hew Ferstl CM, Kim SC, Liu B, Vogel RF, Sartor RB, Haller D. -
Assesment and Control of Bacillus Cereus Emetic Toxin in Food
View metadata, citation and similar papers at core.ac.uk brought to you by CORE provided by Helsingin yliopiston digitaalinen arkisto Assessment and control of Bacillus cereus emetic toxin in food Elina Jääskeläinen Department of Applied Chemistry and Microbiology Division Microbiology University of Helsinki Academic dissertation in Microbiology To be presented, with the permission of the Faculty of Agriculture and Forestry of the University of Helsinki, for public criticism in Auditorium 2041 at Viikki Biocenter, Viikinkaari 5, on February 1th, 2008, at 12 o´clock noon Helsinki 2008 Supervisor: Prof. Mirja S. Salkinoja-Salonen Department of Applied Chemistry and Microbiology Faculty of Agriculture and Forestry University of Helsinki Helsinki, Finland Reviewers: Prof. Willem M. de Vos 1) Laboratory of Microbiology Agrotechnology and Food Sciences Group Wageningen University and Research Centre Wageningen, the Netherlands 2) Department of Basic Veterinary Sciences Faculty of Veterinary Medicine University of Helsinki Helsinki, Finland Dr. Christophe Nguyen-The Institute of Plant Products Technology French National Institute for Agricultural Research (INRA) University of Avignon Avignon, France Opponent: Prof. Jacques Mahillon Laboratory of Food and Environmental Microbiology Université Catholique de Louvain Louvaine-la-Neuve, Belgium ISNN 1795-7079 ISBN 978-952-10-4458-8 (hardback) ISBN 978-952-10-4459-5 (PDF) Yliopistopaino Helsinki, Finland 2008 Front cover: Boys evaluating Mother`s art of cooking To my family Contents: List of original -
Cereulide and Valinomycin, Two Important Natural Dodecadepsipeptides with Ionophoretic Activities
Polish Journal of Microbiology 2010, Vol. 59, No 1, 310 MINIREVIEW Cereulide and Valinomycin, Two Important Natural Dodecadepsipeptides with Ionophoretic Activities MAGDALENA ANNA KROTEÑ, MAREK BARTOSZEWICZ* and IZABELA WIÊCICKA Department of Microbiology, Institute of Biology, University of Bia³ystok, wierkowa 20B, 15-950 Bia³ystok, Poland Received 2 July 2009, revised 20 December 2009, accepted 5 January 2010 Abstract Cereulide produced by Bacillus cereus sensu stricto and valinomycin synthesized mainly by Streptomyces spp. are natural dodecadepsipeptide ionophores that act as potassium transporters. Moreover, they comprise three repetitions of similar tetrapeptide motifs synthesized by non- ribosomal peptide synthesis complexes. Resemblances in their structure find their reflections in the same way of action. The toxicity of valinomycin and cereulide is an effect of the disturbance of ionic equilibrium and transmembrane potential that may influence the whole organism and then cause fatal consequences. The vlm and ces operons encoding valinomycin and cereulide are both composed of two large, similar synthetase genes, one thioestrase gene and four other ORFs with unknown activities. In spite of the characterization of valinomycin and cereulide, genetic determinants encoding their biosynthesis have not yet been clarified. Key words: Bacillus cereus, cereulide, valinomycin, ionophore Introduction lar hydrolytic enzymes and at least two third of known antibiotics (Omura et al., 2001). While cereulide, also The life and growth of both prokaryotic -
Detection and Isolation of Emetic Bacillus Cereus Toxin Cereulide by Reversed Phase Chromatography
toxins Communication Detection and Isolation of Emetic Bacillus cereus Toxin Cereulide by Reversed Phase Chromatography Eva Maria Kalbhenn 1, Tobias Bauer 1, Timo D. Stark 2 , Mandy Knüpfer 3, Gregor Grass 3 and Monika Ehling-Schulz 1,* 1 Functional Microbiology, Institute of Microbiology, Department of Pathobiology, University of Veterinary Medicine Vienna, 1210 Vienna, Austria; [email protected] (E.M.K.); [email protected] (T.B.) 2 Chair of Food Chemistry and Molecular Sensory Science, Technical University of Munich, Lise-Meitner-Straße 34, 85354 Freising, Germany; [email protected] 3 Bundeswehr Institute of Microbiology, Neuherbergstraße 11, 80937 Munich, Germany; [email protected] (M.K.); [email protected] (G.G.) * Correspondence: [email protected] Abstract: The emetic toxin cereulide is a 1.2 kDa dodecadepsipeptide produced by the food pathogen Bacillus cereus. As cereulide poses a serious health risk to humans, sensitive and specific detection, as well as toxin purification and quantification, methods are of utmost importance. Recently, a stable isotope dilution assay tandem mass spectrometry (SIDA–MS/MS)-based method has been described, and an method for the quantitation of cereulide in foods was established by the International Organization for Standardization (ISO). However, although this SIDA–MS/MS method is highly accurate, the sophisticated high-end MS equipment required for such measurements limits the method’s suitability for microbiological and molecular research. Thus, we aimed to develop a method for cereulide toxin detection and isolation using equipment commonly available in microbiological and biochemical research laboratories. Reproducible detection and relative quantification of cereulide Citation: Kalbhenn, E.M.; Bauer, T.; was achieved, employing reversed phase chromatography (RPC). -
Bacillus Cereus Spores and Cereulide in Food-Borne Illness
Recent Publications in this Series: SHAHEEN RANAD 13/2009 Liliya Euro Electron and Proton Transfer in NADH:Ubiquinone Oxidoreductase (Complex I) from Escherichia coli 14/2009 Dario Greco Gene Expression: From Microarrays to Functional Genomics 15/2009 Elena Gorbikova Oxygen Reduction and Proton Translocation By Cytochrome c Oxidase Bacillus cereus 16/2009 Mari J. Lehtonen Rhizoctonia Solani as a Potato Pathogen - Variation of Isolates in Finland and Host Response 17/2009 Kristiina Kaste Transcription Factors ∆FosB and CREB in Drug Addiction: Studies in Models of Alcohol Preference and Chronic Nicotine Exposure Illness in Food-Borne and Cereulide Spores 18/2009 Mari K. Korhonen Functional Characterization of MutL Homologue Mismatch Repair Proteins and Their Variants 19/2009 Heidi Virtanen Structure-Function Studies of GDNF Family Ligand–RET Signalling 20/2009 Solveig Sjöblom Quorum Sensing in the Plant Pathogen Erwinia carotovora subsp. carotovora 21/2009 Tero Närvänen Particle Size Determination during Fluid Bed Granulation — Tools for Enhanced Process Understanding 22/2009 Kaisa Nieminen Cytokinin Signalling in the Regulation of Cambial Development 23/2009 Marja Pummila Role of Eda and Troy Pathways in Ectodermal Organ Development 24/2009 Anna Alonen Glucuronide Isomers: Synthesis, Structural Characterization, and UDP-glucuronosyltransferase Screening 25/2009 Päivi Lindholm Novel CDNF/MANF Protein Family: Molecular Structure, Expression and Neurotrophic Activity 26/2009 Jelena Mijatovic Bacillus cereus Spores and Cereulide in Role of -
Handbook of Proteolytic Enzymes Second Edition Volume 1 Aspartic and Metallo Peptidases
Handbook of Proteolytic Enzymes Second Edition Volume 1 Aspartic and Metallo Peptidases Alan J. Barrett Neil D. Rawlings J. Fred Woessner Editor biographies xxi Contributors xxiii Preface xxxi Introduction ' Abbreviations xxxvii ASPARTIC PEPTIDASES Introduction 1 Aspartic peptidases and their clans 3 2 Catalytic pathway of aspartic peptidases 12 Clan AA Family Al 3 Pepsin A 19 4 Pepsin B 28 5 Chymosin 29 6 Cathepsin E 33 7 Gastricsin 38 8 Cathepsin D 43 9 Napsin A 52 10 Renin 54 11 Mouse submandibular renin 62 12 Memapsin 1 64 13 Memapsin 2 66 14 Plasmepsins 70 15 Plasmepsin II 73 16 Tick heme-binding aspartic proteinase 76 17 Phytepsin 77 18 Nepenthesin 85 19 Saccharopepsin 87 20 Neurosporapepsin 90 21 Acrocylindropepsin 9 1 22 Aspergillopepsin I 92 23 Penicillopepsin 99 24 Endothiapepsin 104 25 Rhizopuspepsin 108 26 Mucorpepsin 11 1 27 Polyporopepsin 113 28 Candidapepsin 115 29 Candiparapsin 120 30 Canditropsin 123 31 Syncephapepsin 125 32 Barrierpepsin 126 33 Yapsin 1 128 34 Yapsin 2 132 35 Yapsin A 133 36 Pregnancy-associated glycoproteins 135 37 Pepsin F 137 38 Rhodotorulapepsin 139 39 Cladosporopepsin 140 40 Pycnoporopepsin 141 Family A2 and others 41 Human immunodeficiency virus 1 retropepsin 144 42 Human immunodeficiency virus 2 retropepsin 154 43 Simian immunodeficiency virus retropepsin 158 44 Equine infectious anemia virus retropepsin 160 45 Rous sarcoma virus retropepsin and avian myeloblastosis virus retropepsin 163 46 Human T-cell leukemia virus type I (HTLV-I) retropepsin 166 47 Bovine leukemia virus retropepsin 169 48 -
Pathometabolism of Emetic Bacillus Cereus
REVIEW published: 14 July 2015 doi: 10.3389/fmicb.2015.00704 Food–bacteria interplay: pathometabolism of emetic Bacillus cereus Monika Ehling-Schulz1*, Elrike Frenzel1† and Michel Gohar2 Edited by: 1 Functional Microbiology, Institute of Microbiology, Department of Pathobiology, University of Veterinary Medicine Vienna, Beiyan Nan, Vienna, Austria, 2 INRA, UMR1319 Micalis, AgroParistech – Domaine de Vilvert, Génétique Microbienne et Environnement, University of California, Berkeley, USA Jouy-en-Josas, France Reviewed by: George-John Nychas, Bacillus cereus is a Gram-positive endospore forming bacterium known for its wide Agricultural University of Athens, Greece spectrum of phenotypic traits, enabling it to occupy diverse ecological niches. Although Pendru Raghunath, the population structure of B. cereus is highly dynamic and rather panmictic, production Dr. VRK Women’s Medical College, India of the emetic B. cereus toxin cereulide is restricted to strains with specific genotypic Learn-Han Lee, traits, associated with distinct environmental habitats. Cereulide is an ionophoric Monash University Malaysia, Malaysia dodecadepsipeptide that is produced non-ribosomally by an enzyme complex with an Jacques Mahillon, Université Catholique de Louvain, unusual modular structure, named cereulide synthetase (Ces non-ribosomal peptide Belgium synthetase). The ces gene locus is encoded on a mega virulence plasmid related to *Correspondence: the B. anthracis toxin plasmid pXO1. Cereulide, a highly thermo- and pH- resistant Monika Ehling-Schulz, Functional Microbiology, Institute molecule, is preformed in food, evokes vomiting a few hours after ingestion, and was of Microbiology, Department shown to be the direct cause of gastroenteritis symptoms; occasionally it is implicated of Pathobiology, University in severe clinical manifestations including acute liver failures. -
Structure Revision of Isocereulide A, an Isoform of the Food Poisoning Emetic Bacillus Cereus Toxin Cereulide
molecules Article Structure Revision of Isocereulide A, an Isoform of the Food Poisoning Emetic Bacillus cereus Toxin Cereulide Veronika Walser 1, Markus Kranzler 2 , Monika Ehling-Schulz 2 , Timo D. Stark 1,* and Thomas F. Hofmann 1 1 Food Chemistry and Molecular Sensory Science, Technical University of Munich, Lise-Meitner-Str. 34, 85354 Freising, Germany; [email protected] (V.W.); [email protected] (T.F.H.) 2 Institute of Microbiology, Department of Pathobiology, University of Veterinary Medicine Vienna, Veterinärplatz 1, 1210 Vienna, Austria; [email protected] (M.K.); [email protected] (M.E.-S.) * Correspondence: [email protected]; Tel.: +49-8161-71-2911 Abstract: The emetic Bacillus cereus toxin cereulide presents an enormous safety hazard in the food industry, inducing emesis and nausea after the consumption of contaminated foods. Additional to cereulide itself, seven structurally related isoforms, namely the isocereulides A–G, have already been elucidated in their chemical structure and could further be identified in B. cereus contaminated food samples. The newly performed isolation of isocereulide A allowed, for the first time, 1D- and 2D-NMR spectroscopy of a biosynthetically produced isocereulide, revealing results that contradict previous assumptions of an L-O-Leu moiety within its chemical structure. By furthermore applying posthydrolytical dipeptide analysis, amino acid and a-hydroxy acid analysis by means of UPLC-ESI- TOF-MS, as well as MSn sequencing, the structure of previously reported isocereulide A could be corrected. Instead of the L-O-Leu as assumed to date, one L-O-Ile unit could be verified in the cyclic Citation: Walser, V.; Kranzler, M.; Ehling-Schulz, M.; Stark, T.D.; dodecadepsipeptide, revising the structure of isocereulide A to [(D-O-Leu-D-Ala-L-O-Val-L-Val)2(D- Hofmann, T.F. -
The Detrimental Impact of Extracellular Bacterial Proteases on Wound Healing
1 Title: The detrimental impact of extracellular bacterial proteases on wound healing 2 3 Running title: Bacterial proteases 4 5 Authors: Sharon Lindsay1, Angela Oates2, Katie Bourdillon1 6 7 Author affiliations: 8 1 Systagenix Wound Management Gargrave N. Yorkshire BD23 3RX UK 9 2School of Pharmacy and Pharmaceutical Sciences, The University of Manchester, 10 Manchester, M13 9PT, UK 11 12 Corresponding author: 13 Katie Bourdillon 14 Key words: 15 Virulence factor, bacterial protease, wound infection, point-of-care diagnostic 16 Article: This is the peer reviewed version of the following article: Lindsay, S, Oates, A orcid.org/0000-0003-0519-4556 and Bourdillon, K (2017) The detrimental impact of extracellular bacterial proteases on wound healing. International Wound Journal, 14 (6). pp. 1237-1247. ISSN 1742-4801 which has been published in final form at https://doi.org/10.1111/ iwj.12790. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions. 1 17 Abstract 18 In addition to clinical signs of infection (e.g. inflammation, purulence and pain), a microbial 19 20 However, it is increasingly recognised that, rather than a high bioburden level alone being 21 detrimental to wound healing, it is the virulence of the invading microorganism and the host's 22 immune status that can affect clinical outcomes. Bacteria, such as Pseudomonas aeruginosa, 23 Staphylococcus aureus and Staphylococcus epidermidis, have developed a range of virulence 24 factorsto helpthemovercome hostdefences andproliferate within the underlying soft tissue. 25 More specifically, bacterial proteases are one such virulence factor that has been implicated 26 in promoting the invasion and destruction of the host tissue.