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Review Pili in Gram-Negative and Gram-Positive Bacteria – Structure
Cell. Mol. Life Sci. 66 (2009) 613 – 635 1420-682X/09/040613-23 Cellular and Molecular Life Sciences DOI 10.1007/s00018-008-8477-4 Birkhuser Verlag, Basel, 2008 Review Pili in Gram-negative and Gram-positive bacteria – structure, assembly and their role in disease T. Profta,c,* and E. N. Bakerb,c a School of Medical Sciences, Department of Molecular Medicine & Pathology, University of Auckland, Private Bag 92019, Auckland 1142 (New Zealand), Fax: +64-9-373-7492, e-mail: [email protected] b School of Biological Sciences, University of Auckland, Auckland (New Zealand) c Maurice Wilkins Centre for Molecular Biodiscovery, University of Auckland (New Zealand) Received 08 August 2008; received after revision 24 September 2008; accepted 01 October 2008 Online First 27 October 2008 Abstract. Many bacterial species possess long fila- special form of bacterial cell movement, known as mentous structures known as pili or fimbriae extend- twitching motility. In contrast, the more recently ing from their surfaces. Despite the diversity in pilus discovered pili in Gram-positive bacteria are formed structure and biogenesis, pili in Gram-negative bac- by covalent polymerization of pilin subunits in a teria are typically formed by non-covalent homopo- process that requires a dedicated sortase enzyme. lymerization of major pilus subunit proteins (pilins), Minor pilins are added to the fiber and play a major which generates the pilus shaft. Additional pilins may role in host cell colonization. be added to the fiber and often function as host cell This review gives an overview of the structure, adhesins. Some pili are also involved in biofilm assembly and function of the best-characterized pili formation, phage transduction, DNA uptake and a of both Gram-negative and Gram-positive bacteria. -
G:\CLASSES\BI 345N6\Bi345n6 W07\Biol 345 W07
BIOLOGY 345 Name _____________________ Midterm I - 05 February 2007 PART I. Multiple choice questions – (4 points each, 36 points total). 1. Which of the following metals was used in the construction of pipes in early Rome and may have contributed to the fall of the Roman emprire? A. Iron B. Bronze C. Gold D. Lead E. Silver 2. Louis Pasteur is recognized as the scientist who finally refuted which hypothesis using experiments involving microorganisms and swan-necked flasks? A. Germ Theory B. Spontaneous generation C. Natural selection D. Ontogeny recapitulates phylogeny E. Pasteurization principle 3. Cell walls are important features in both bacteria and archaea. Which of the following componds best describes the biomolecular subunits one might find exclusively in an archaeal cell wall? A. Diaminopimelic acid (DAP) & D-alanine interbridge B. L-lysine & pentaglycine interbridge C. N-acetylglucosamine (NAG) & N-acetylmuramic acid (NAM) glycan D. N-acetylglucosamine (NAG) & N-acetyltalosaminuronic acid (NAT) glycan E. Dipicolinic acid & Ca++ 4. Considering the multitude of potential metabolic processes available to prokaryotes, which of the following are used to describe specific types of chemotrophic metabolisms? A. Energy source B. Carbon source C. Electron source D. Hydrogen source E. Electron acceptor Page 1 of 8 5. The majority of the bacterial cell’s dry weight (96.1% in E. coli) is due to just a few macromolecules and polymers. Which of the following is NOT a major component of a bacterial cell? A. RNA B. Peptidoglycan (aka murein) C. Proteins D. Vitamins E. Lipids 6. Which of the following is an invariant feature found among all microbial cells? A. -
Antonie Van Leeuwenhoek Journal of Microbiology
Antonie van Leeuwenhoek Journal of Microbiology Kroppenstedtia pulmonis sp. nov. and Kroppenstedtia sanguinis sp. nov., isolated from human patients --Manuscript Draft-- Manuscript Number: ANTO-D-15-00548R1 Full Title: Kroppenstedtia pulmonis sp. nov. and Kroppenstedtia sanguinis sp. nov., isolated from human patients Article Type: Original Article Keywords: Kroppenstedtia species, Kroppenstedtia pulmonis, Kroppenstedtia sanguinis, polyphasic taxonomy, 16S rRNA gene, thermoactinomycetes Corresponding Author: Melissa E Bell, MS Centers for Disease Control and Prevention Atlanta, Georgia UNITED STATES Corresponding Author Secondary Information: Corresponding Author's Institution: Centers for Disease Control and Prevention Corresponding Author's Secondary Institution: First Author: Melissa E Bell, MS First Author Secondary Information: Order of Authors: Melissa E Bell, MS Brent A. Lasker, PhD Hans-Peter Klenk, PhD Lesley Hoyles, PhD Catherine Spröer Peter Schumann June Brown Order of Authors Secondary Information: Funding Information: Abstract: Three human clinical strains (W9323T, X0209T and X0394) isolated from lung biopsy, blood and cerebral spinal fluid, respectively, were characterized using a polyphasic taxonomic approach. Comparative analysis of the 16S rRNA gene sequences showed the three strains belonged to two novel branches within the genus Kroppenstedtia: 16S rRNA gene sequence analysis of W9323T showed closest sequence similarity to Kroppenstedtia eburnea JFMB-ATE T (95.3 %), Kroppenstedtia guangzhouensis GD02T (94.7 %) and strain X0209T (94.6 %); sequence analysis of strain X0209T showed closest sequence similarity to K. eburnea JFMB-ATE T (96.4 %) and K. guangzhouensis GD02T (96.0 %). Strains X0209T and X0394 were 99.9 % similar to each other by 16S rRNA gene sequence analysis. The DNA-DNA relatedness was 94.6 %, confirming that X0209T and X0394 belong to the same species. -
Engineering the Human Microbiome, a Natural Double-Barreled Approach Towards Solving Both Our Current Antibiotic Resistance and Sepsis Problems
American Journal of www.biomedgrid.com Biomedical Science & Research ISSN: 2642-1747 --------------------------------------------------------------------------------------------------------------------------------- Opinion Copy Right@ Toleman MA Engineering the Human Microbiome, A Natural Double-Barreled Approach Towards Solving both our Current Antibiotic Resistance and Sepsis Problems Martins W1, Mathias J1, Babenko D2 and Toleman MA1* 1Cardiff University Medical school, Department of Immunology and Infection, The Heath hospital, UK 2Karaganda Medical University, Kazakhstan *Corresponding author: Toleman MA, Cardiff University Medical school, Department of Immunology and Infection, The Heath hospital, Cardiff, UK. To Cite This Article: Martins W, Mathias J, Babenko D, Toleman MA, Engineering the Human Microbiome, A Natural Double-Barreled Approach Towards Solving both our Current Antibiotic Resistance and Sepsis Problems. Am J Biomed Sci & Res. 2020 - 11(3). AJBSR.MS.ID.001632. DOI: 10.34297/AJBSR.2020.11.001632. Received: December 12, 2020; Published: December 18, 2020 Opinion resistance mechanism responsible for this rise was an enzyme Many of the bacteria that cause life-threatening infection live called CTX-M-15 that gave resistance to the penicillin, monobactam, in very close association with us. Escherichia coli, for example and cephalosporin classes of the ß-lactam family of antibiotics (c. causes 80% of common community associated urinary tract infections and is also the main cause of serious (blood-stream) in several enteric pathogens including E. coli in New Delhi, India infection throughout Europe [1,2]. However, E. coli routinely lives 50% of all antibiotics) [7]. Its gene blaCTX-M-15 was first isolated in 2000 [8]. Later publications indicated that it was widespread as a commensal organism in our gut. -
Current Issues of Nano-Bio-Science
Current Issues of Nano-Bio-Science CeNS Winterschool 2003 Mauterndorf, Austria 24-28 February 2003 Current Issues of Nano-Bio-Science CeNS Winterschool 2003 Mauterndorf, Austria 24-28 February 2003 in cooperation with SFB 486 and SFB 513 Program Committee Organisation Christoph Bräuchle Monika Kaempfe Jan von Delft Evelyn Morgenroth Hermann Gaub Joachim Rädler Jörg P. Kotthaus Paul Leiderer Joachim Rädler Internal Students’ Seminar: Schedule Saturday, 22nd February 7:30 pm Meeting in front of the castle’s lower gate to go the “Skialm” together 8:00 pm Get-together at the „Skialm“ in Mauterndorf (in the Skiing center) (kitchen closes at 9:30 pm) Sunday, 23rd February 9:45 am Introduction (W. Parak, F. Simmel) 10:00 am Simon Keller (AG Rädler) 10:30 am Stefan Griessl (AG Heckl) 11:00 am Coffee break 11:30 am Christine Meyer (AG Kotthaus) 12:00 pm Michael Sindel (AG von Delft) 12:30 pm Lunch (not provided), informal discussions 5:00 pm Ferdinand Kühner (AG Gaub) 5:30 pm Stefan Beyer (NG Simmel) Teresa Pellegrino (NG Parak) 6:00 pm Stefan Kowarik (AG Feldmann) 6:30 pm Break 7:00 pm Niklolay Petkov (AG Bein) 7:30 pm Sebastian Gritschneder (AG Reichling) 8:00 pm Ralf Bausinger / Johanna Kirstein (AG Bräuchle) 8:30 pm Conclusion Program Monday, 24th February 2003 8.30 – 8.45 Opening 8.45 – 9.45 Cees Dekker, Delft University of Technology Carbon nanotubes as model systems for nanoelectronics and nanosensors 9.45 – 10.45 Ulf Diederichsen, Universität Göttingen Molecular architecture with biooligomers 10.45 – 11.15 Coffee Break 11.15 – 12.15 Wolfgang -
Cell Structure and Function in the Bacteria and Archaea
4 Chapter Preview and Key Concepts 4.1 1.1 DiversityThe Beginnings among theof Microbiology Bacteria and Archaea 1.1. •The BacteriaThe are discovery classified of microorganismsinto several Cell Structure wasmajor dependent phyla. on observations made with 2. theThe microscope Archaea are currently classified into two 2. •major phyla.The emergence of experimental 4.2 Cellscience Shapes provided and Arrangements a means to test long held and Function beliefs and resolve controversies 3. Many bacterial cells have a rod, spherical, or 3. MicroInquiryspiral shape and1: Experimentation are organized into and a specific Scientificellular c arrangement. Inquiry in the Bacteria 4.31.2 AnMicroorganisms Overview to Bacterialand Disease and Transmission Archaeal 4.Cell • StructureEarly epidemiology studies suggested how diseases could be spread and 4. Bacterial and archaeal cells are organized at be controlled the cellular and molecular levels. 5. • Resistance to a disease can come and Archaea 4.4 External Cell Structures from exposure to and recovery from a mild 5.form Pili allowof (or cells a very to attach similar) to surfacesdisease or other cells. 1.3 The Classical Golden Age of Microbiology 6. Flagella provide motility. Our planet has always been in the “Age of Bacteria,” ever since the first 6. (1854-1914) 7. A glycocalyx protects against desiccation, fossils—bacteria of course—were entombed in rocks more than 3 billion 7. • The germ theory was based on the attaches cells to surfaces, and helps observations that different microorganisms years ago. On any possible, reasonable criterion, bacteria are—and always pathogens evade the immune system. have been—the dominant forms of life on Earth. -
Verrucosispora Rhizosphaerae Sp. Nov., Isolated from Mangrove Rhizosphere Soil
Antonie van Leeuwenhoek DOI 10.1007/s10482-017-0933-4 ORIGINAL PAPER Verrucosispora rhizosphaerae sp. nov., isolated from mangrove rhizosphere soil Qing-yi Xie . Xiao-dong Bao . Qing-yu Ma . Fan-dong Kong . Man-li Zhou . Bing Yan . You-xing Zhao Received: 24 May 2017 / Accepted: 19 August 2017 Ó The Author(s) 2017. This article is an open access publication Abstract An actinomycete strain, 2603PH03T,was phosphatidylserine and an unidentified phospholipid. isolated from a mangrove rhizosphere soil sample The DNA G?C content was determined to be collected in Wenchang, China. Phylogenetic analysis of 70.1 mol%. The results of physiological and biochem- the 16S rRNA gene sequence of strain 2603PH03T ical tests and low DNA-DNA relatedness readily indicated high similarity to Verrucosispora gifthornen- distinguished the isolate from the closely related sis DSM 44337T (99.4%), Verrucosispora andamanen- species. On the basis of these phenotypic and genotypic sis (99.4%), Verrucosispora fiedleri MG-37T (99.4%) data, strain 2603PH03T is concluded to represent a novel and Verrucosispora maris AB18-032T (99.4%). The species of the genus Verrucosispora, for which the name cell wall was found to contain meso-diaminopimelic Verrucosispora rhizosphaerae sp. nov. is proposed. The acid and glycine. The major menaquinones were type strain is 2603PH03T (=CCTCC AA T T identified as MK-9(H4), MK-9(H6) and MK-9(H8), 2016023 = DSM 45673 ). with MK-9(H2), MK-10(H2), MK-9(H10) and MK- 10(H6) as minor components. The characteristic whole Keywords Verrucosispora rhizosphaerae sp. nov. Á cell sugars were found to be xylose and mannose. -
Multiple Conformations Facilitate Pilt Function in the Type IV Pilus
bioRxiv preprint doi: https://doi.org/10.1101/672212; this version posted June 15, 2019. The copyright holder for this preprint (which was not certified by peer review) is the author/funder. All rights reserved. No reuse allowed without permission. Multiple conformations facilitate PilT function in the type IV pilus Matthew McCallum1,2, Samir Benlekbir2, Sheryl Nguyen2, Stephanie Tammam2, John L. Rubinstein1,2,3,*, Lori L. Burrows4,*, and P. Lynne Howell1,2,* 1Department of Biochemistry, University of Toronto, Toronto, ON M5S 1A8, Canada 2Program in Molecular Structure & Function, Peter Gilgan Centre for Research and Learning, The Hospital for SicK Children, Toronto, ON M5G 0A4, Canada. 3Department of Medical Biophysics, University of Toronto, Toronto, ON M5G 1l7, Canada. 4Department of Biochemistry and Biomedical Sciences and the Michael G. DeGroote Institute for Infectious Disease Research, McMaster University, Hamilton, ON L8S 4K1, Canada. To whom correspondence should be addressed: Dr. Lynne Howell. Phone: 416-813-5378; Email: [email protected] Dr. Lori Burrows, Phone: 905-525-9140, x22029; Email: [email protected] Dr. John Rubinstein. Phone 416-813-7255; [email protected] bioRxiv preprint doi: https://doi.org/10.1101/672212; this version posted June 15, 2019. The copyright holder for this preprint (which was not certified by peer review) is the author/funder. All rights reserved. No reuse allowed without permission. Abstract Type IV pilus-like systems are protein complexes that polymerize a fibre of pilins. They are critical for virulence in many pathogens. Pilin polymerization and depolymerization are powered by motor PilT-like ATPases thought to possess C2 symmetry. However, most PilT-like ATPases crystallize with either C3 or C6 symmetry and the relevance of these conformations is unclear. -
Trans-Kingdom Enzyme Shared by Chlamydia and Plants for Synthesis of Diaminopimelate͞lysine
L,L-diaminopimelate aminotransferase, a trans-kingdom enzyme shared by Chlamydia and plants for synthesis of diaminopimelate͞lysine Andrea J. McCoy*, Nancy E. Adams*, Andre´O. Hudson†, Charles Gilvarg‡, Thomas Leustek†, and Anthony T. Maurelli*§ *Department of Microbiology and Immunology, F Edward He´bert School of Medicine, Uniformed Services University of the Health Sciences, 4301 Jones Bridge Road, Bethesda, MD 20814-4799; †Biotech Center and Department of Plant Biology and Pathology, Rutgers University, 59 Dudley Road, New Brunswick, NJ 08901-8520; and ‡Department of Molecular Biology, Princeton University, Princeton, NJ 08544 Communicated by Roy Curtiss, Arizona State University, Tempe, AZ, October 2, 2006 (received for review July 15, 2006) The synthesis of meso-diaminopimelic acid (m-DAP) in bacteria is we refer to the four-step synthesis of THDP as the upper m-DAP essential for both peptidoglycan and lysine biosynthesis. From synthesis pathway. From THDP, three variant pathways have genome sequencing data, it was unclear how bacteria of the been defined for m-DAP synthesis in the bacteria: the succin Chlamydiales order would synthesize m-DAP in the absence of ylase, acetylase, and dehydrogenase pathways. The succinylase dapD, dapC, and dapE, which are missing from the genome. Here, pathway uses succinylated intermediates and is the most widely we assessed the biochemical capacity of Chlamydia trachomatis distributed in bacteria. Genes encoding THDP succinyltrans- serovar L2 to synthesize m-DAP. Expression of the chlamydial asd, ferase (dapD) and N-succinyl-L,L-DAP desuccinylase (dapE) dapB, and dapF genes in the respective Escherichia coli m-DAP have been characterized, whereas two enzymes, DapC and auxotrophic mutants restored the mutants to DAP prototrophy. -
Actinoplanes Aureus Sp. Nov., a Novel Protease- Producing Actinobacterium Isolated from Soil
Actinoplanes aureus sp. nov., a novel protease- producing actinobacterium isolated from soil Xiujun Sun Northeast Agricultural University Xianxian Luo Northeast Agricultural University Chuan He Northeast Agricultural University Zhenzhen Huang Northeast Agricultural University Junwei Zhao Northeast Agricultural University Beiru He Northeast Agricultural University Xiaowen Du Northeast Agricultural University Wensheng Xiang Northeast Agricultural University Jia Song ( [email protected] ) Northeast Agricultural University https://orcid.org/0000-0002-0398-2666 Xiangjing Wang Northeast Agricultural University Research Article Keywords: Actinoplanes aureus sp. nov, genome, polyphasic analysis, 16S rRNA gene Posted Date: April 26th, 2021 DOI: https://doi.org/10.21203/rs.3.rs-260966/v1 License: This work is licensed under a Creative Commons Attribution 4.0 International License. Read Full License Page 1/19 Version of Record: A version of this preprint was published at Antonie van Leeuwenhoek on July 29th, 2021. See the published version at https://doi.org/10.1007/s10482-021-01617-4. Page 2/19 Abstract A novel protease-producing actinobacterium, designated strain NEAU-A11T, was isolated from soil collected from Aohan banner, Chifeng, Inner Mongolia Autonomous Region, China, and characterised using a polyphasic approach. On the basis of 16S rRNA gene sequence analysis, strain NEAU-A11T was indicated to belong to the genus Actinoplanes and was most closely related to Actinoplanes rectilineatus JCM 3194T (98.9 %). Cell walls contained meso-diaminopimelic acid as the diagnostic diamino acid and the whole-cell sugars were arabinose, xylose and glucose. The phospholipid prole contained diphosphatidylglycerol, phosphatidylethanolamine, phosphatidylglycerol, phosphatidylinositol and two phosphatidylinositol mannosides. The predominant menaquinones were MK-9(H4), MK-9(H6) and MK- 9(H8). -
Name of the Manuscript
Available online: May 27, 2019 Commun.Fac.Sci.Univ.Ank.Series C Volume 28, Number 1, Pages 78-90 (2019) ISSN 1303-6025 E-ISSN 2651-3749 https://dergipark.org.tr/tr/pub/communc/issue/45050/570542 CHEMOTAXONOMY IN BACTERIAL SYSTEMATICS F. SEYMA GOKDEMİR, SUMER ARAS ABSTRACT. In taxonomy, polyphasic approach is based on the principle of combining and evaluating different types of data obtained from microorganisms. While, during characterization and identification of a microorganism, in the direction of polyphasic studies, chemotaxonomic analysis has of paramount importance for the determination of the most important differences between the family, genus and species comparatively. It is beyond doubt that, in recent years significant developments have been achieved in systematics by the aid of molecular biological studies. Phylogenetic data have revealed the hierarchical arrangement of the kinship relations between the given bacteria, however, this information cannot provide reliable data on the level of genus. At this stage, chemical markers play an important role in regulating inter-taxa relationships. Chemotaxonomy; is the whole of the characterizations made by using the similarities and differences of the biochemical properties of bacteria. In bacterial systematics, chemotaxonomy examines biochemical markers such as: amino acids and peptides (peptidoglycan), lipids (fatty acid, lipopolysaccharides, micolic acid and polar lipids), polysaccharides and related polymers (teicoic acid, whole sugar) and other complex polymeric compounds to find the distribution of members of different taxa and all of this information is used for classification and identification. In this review, how the chemotaxonomic data can be used in bacterial systematics and reflected to application within the field questions were evaluated.-REVIEW. -
Unit:C: Bacteria and Mollicutes: • Part:1
UNIT:C: BACTERIA AND MOLLICUTES: PART:1: General characteristics,Morphological characters PART:2: Basic methods of classification and Reproduction PART:1 A.Bacteria: Definition: Bacteria are microscopic unicellular,prokaryotic organisms devoid of chlorophyll,most commonly reproduce by transverse binary fission and the resuting cells are identical in size and morphology(Shape:spherical/rod,spiral or curved spherical arrangements of cell(coccus/micrococcus/diplococcus(paired),tetraacoccus(arranged in 4). B.General characteristics of Phytopathogenic bacteria 1. Bacteria are small: 0.6-3.5 microns in length, 0.5-1.0 microns in diameter 2. Most plant pathogenic bacteria are facultative saprophytes and can be grown artificially on nutrient media; however, fastidious vascular bacteria are difficult to grow in culture and some of them have yet to be grown in culture. 3. Bacteria may be rod shaped, spherical, spiral, or filamentous (threadlike). 4. Mostly flagellate hence motile.Some bacteria can move through liquid media by means of flagella, whereas others have no flagella and cannot move themselves. 5. Some can transform themselves into spores, and the filamentous bacteria Streptomyces can produce spores, called conidia, at the end of the filament. Other bacteria, however, do not produce any spores. 6. The vegetative stages of most types of bacteria reproduce by simple fission. 7. Bacteria multiply with astonishing rapidity they can produce tremendous numbers of cells in a short period of time. 8. Carbohydrate decomposition is mostly aerobic or oxidative (Except, Erwinia,which is facultative anaerobe) 9. Mostly gram-ve,rarely gram+ve(gram+ve genera:Streptomyces,Corynebacterium,Clavibacter,Curtobacterium) 10. PPB are passive invaders,i.e.