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Hennrich O, Weinmann L, Kulik A, Harms K, Klahn P, Youn JW, Surup F, Mast Y. Biotransformation-coupled mutasynthesis for the generation of novel pristinamycin derivatives by engineering the phenylglycine residue. RSC Chem Biol 2023; 4:1050-1063. [PMID: 38033732 PMCID: PMC10685826 DOI: 10.1039/d3cb00143a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2023] [Accepted: 10/06/2023] [Indexed: 12/02/2023] Open
Abstract
Streptogramins are the last line of defense antimicrobials with pristinamycin as a representative substance used as therapeutics against highly resistant pathogenic bacteria. However, the emergence of (multi)drug-resistant pathogens renders these valuable antibiotics useless; making it necessary to derivatize compounds for new compound characteristics, which is often difficult by chemical de novo synthesis due to the complex nature of the molecules. An alternative to substance derivatization is mutasynthesis. Herein, we report about a mutasynthesis approach, targeting the phenylglycine (Phg) residue for substance derivatization, a pivotal component of streptogramin antibiotics. Mutasynthesis with halogenated Phg(-like) derivatives altogether led to the production of two new derivatized natural compounds, as there are 6-chloropristinamycin I and 6-fluoropristinamycin I based on LC-MS/MS analysis. 6-Chloropristinamycin I and 6-fluoropristinamycin I were isolated by preparative HPLC, structurally confirmed using NMR spectroscopy and tested for antimicrobial bioactivity. In a whole-cell biotransformation approach using an engineered E. coli BL21(DE3) pET28-hmo/pACYC-bcd-gdh strain, Phg derivatives were generated fermentatively. Supplementation with the E. coli biotransformation fermentation broth containing 4-fluorophenylglycine to the pristinamycin mutasynthesis strain resulted in the production of 6-fluoropristinamycin I, demonstrating an advanced level of mutasynthesis.
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Affiliation(s)
- Oliver Hennrich
- Department Bioresources for Bioeconomy and Health Research, Leibniz Institute DSMZ-German Collection of Microorganisms and Cell Cultures, Inhoffenstraße 7B 38124 Braunschweig Germany
| | - Leoni Weinmann
- Institute of Microbiology, University Stuttgart, Allmandring 31 D-70569 Stuttgart Germany
| | - Andreas Kulik
- Department Microbial Bioactive Compounds, Interfaculty Institute of Microbiology and Infection Medicine, Faculty of Science, University of Tübingen, Auf der Morgenstelle 28 D-72076 Tübingen Germany
| | - Karen Harms
- Microbial Drugs Department, Helmholtz-Centre for Infection Research 38124 Braunschweig Germany
| | - Philipp Klahn
- Division of Organic and Medicinal Chemistry, Department of Chemistry and Molecular Biology, University of Gothenburg, Kemigården 4 412 96 Göteborg Sweden
- Centre of Antimicrobial Resistance Research in Gothenburg (CARe) Gothenburg Sweden
| | - Jung-Won Youn
- Institute of Microbiology, University Stuttgart, Allmandring 31 D-70569 Stuttgart Germany
| | - Frank Surup
- Microbial Drugs Department, Helmholtz-Centre for Infection Research 38124 Braunschweig Germany
| | - Yvonne Mast
- Department Bioresources for Bioeconomy and Health Research, Leibniz Institute DSMZ-German Collection of Microorganisms and Cell Cultures, Inhoffenstraße 7B 38124 Braunschweig Germany
- Technische Universität Braunschweig, Institut für Mikrobiologie, Rebenring 56 38106 Braunschweig Germany
- German Center for Infection Research (DZIF), Partner Site Tübingen Tübingen Germany
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Gupta V, Shekhawat SS, Kulshreshtha NM, Gupta AB. A systematic review on chlorine tolerance among bacteria and standardization of their assessment protocol in wastewater. WATER SCIENCE AND TECHNOLOGY : A JOURNAL OF THE INTERNATIONAL ASSOCIATION ON WATER POLLUTION RESEARCH 2022; 86:261-291. [PMID: 35906907 DOI: 10.2166/wst.2022.206] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Though chlorine is a cost-effective disinfectant for water and wastewaters, the bacteria surviving after chlorination pose serious public health and environmental problems. This review critically assesses the mechanism of chlorine disinfection as described by various researchers; factors affecting chlorination efficacy; and the re-growth potential of microbial contaminations in treated wastewater post chlorination to arrive at meaningful doses for ensuring health safety. Literature analysis shows procedural inconsistencies in the assessment of chlorine tolerant bacteria, making it extremely difficult to compare the tolerance characteristics of different reported tolerant bacteria. A comparison of logarithmic reduction after chlorination and the concentration-time values for prominent pathogens led to the generation of a standard protocol for the assessment of chlorine tolerance. The factors that need to be critically monitored include applied chlorine doses, contact time, determination of chlorine demands of the medium, and the consideration of bacterial counts immediately after chlorination and in post chlorinated samples (regrowth). The protocol devised here appropriately assesses the chlorine-tolerant bacteria and urges the scientific community to report the regrowth characteristics as well. This would increase the confidence in data interpretation that can provide a better understanding of chlorine tolerance in bacteria and aid in formulating strategies for effective chlorination.
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Affiliation(s)
- Vinayak Gupta
- Alumnus, Department of Civil and Environmental Engineering, National University of Singapore, Singapore; School of Environment and Society, Tokyo Institute of Technology, Tokyo, Japan
| | - Sandeep Singh Shekhawat
- Department of Civil Engineering, Malaviya National Institute of Technology, Jaipur, India E-mail: ; School of Life and Basic Sciences, SIILAS Campus, Jaipur National University Jaipur, India
| | - Niha Mohan Kulshreshtha
- Department of Civil Engineering, Malaviya National Institute of Technology, Jaipur, India E-mail:
| | - Akhilendra Bhushan Gupta
- Department of Civil Engineering, Malaviya National Institute of Technology, Jaipur, India E-mail:
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Falces-Romero I, Jiménez-Rodríguez S, Rico-Nieto A. Soft tissue infection due to catalase-negative Staphylococcus lugdunensis: First case reported in Europe. Med Clin (Barc) 2020; 155:322-323. [DOI: 10.1016/j.medcli.2019.06.013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2019] [Revised: 05/27/2019] [Accepted: 06/06/2019] [Indexed: 10/26/2022]
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Aljahani A, Alarjani K, Hassan Z, Elkhadragy M, Ismail E, Al-Masoud A, Yehia H. Molecular detection of methicillin heat-resistant Staphylococcus aureus strains in pasteurized camel milk in Saudi Arabia. Biosci Rep 2020; 40:BSR20193470. [PMID: 32202302 PMCID: PMC7167254 DOI: 10.1042/bsr20193470] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2019] [Revised: 03/12/2020] [Accepted: 03/19/2020] [Indexed: 11/17/2022] Open
Abstract
Antibiotic- and heat-resistant bacteria in camel milk is a potential public health problem. Staphylococcus aureus (S. aureus) is an opportunistic pathogen in humans, dairy cattle and camels. We characterized the phenotype and genotype of methicillin-resistant staphylococcal strains recovered from pasteurized and raw camel milk (as control) distributed in the retail markets of Saudi Arabia. Of the 100 samples assessed between March and May 2016, 20 S. aureus isolates were recovered from pasteurized milk, 10 of which were resistant to cefoxitin, and as such, were methicillin-resistant. However, raw camel milk did not contain methicillin-resistant S. aureus (MRSA). Antimicrobial susceptibility tests showed that the resistance ratio for other antibiotics was 60%. We performed a polymerase chain reaction (PCR) assay using primers for the methicillin-resistant gene mecA and nucleotide sequencing to detect and verify the methicillin-resistant strains. Basic local alignment search tool (BLAST) analysis of the gene sequences showed a 96-100% similarity between the resistant isolates and the S. aureus CS100 strain's mecA gene. Ten of the methicillin-resistant isolates were heat-resistant and were stable at temperatures up to 85°C for 60 s, and three of these were resistant at 90°C for 60 or 90 s. The mean decimal reduction time (D85-value) was 111 s for the ten isolates. Sodium dodecyl sulfate (SDS)/polyacrylamide gel electrophoresis (PAGE) showed that there was no difference in the total protein profiles for the ten methicillin heat-resistant S. aureus (MHRSA) isolates and for S. aureus ATCC 29737. In conclusion, a relatively high percentage of the tested pasteurized camel milk samples contained S. aureus (20%) and MHRSA (10%).
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Affiliation(s)
- Amani H. Aljahani
- Department of Physical Sport Science, Nutrition and Food Science, Princess Nourah Bint Abdulrahman University, Saudi Arabia
| | - Khaloud M. Alarjani
- Department of Botany and Microbiology, College of Science, King Saud University, Saudi Arabia
| | - Zeinab K. Hassan
- Cancer Biology Department, Virology and Immunolgy Unit, National Cancer Institute, Cairo University, Egypt
| | - Manal F. Elkhadragy
- Biology Department, Faculty of Science, Princess Nourah bint Abdulrahman University, Riyadh 11671, Saudi Arabia
- Zoology Department, Faculty of Science, Helwan University, Cairo 11790, Egypt
| | - Elsayed A. Ismail
- Department of Dairy Science, Faculty of Agriculture, Benha University, Benha 13518, Egypt
| | - Abdulrahman H. Al-Masoud
- Food Science and Nutrition Department, College of Food and Agricultural Sciences, King Saud University, Riyadh, Saudi Arabia
| | - Hany M. Yehia
- Food Science and Nutrition Department, College of Food and Agricultural Sciences, King Saud University, Riyadh, Saudi Arabia
- Food Science and Nutrition Department, Faculty of Home Economics, Helwan University, Cairo, Egypt
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5
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Abstract
Staphylococcus aureus is a bacterium that can cause a variety of illnesses through suppurative or nonsuppurative (toxin-mediated) means. S aureus is a common cause of skin and skin structure infections as well as osteoarticular infections in the pediatric population. S aureus is also identified in cases of septicemia, infective endocarditis, pneumonia, ocular infections, and central nervous system infections. To design appropriate empirical therapy, pediatricians should be knowledgeable about the resistance patterns of S aureus in their communities, including methicillin and clindamycin resistance. This article reviews the microbiology, colonization and transmission, and antibiotic resistance of and clinical diseases caused by S aureus.
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Affiliation(s)
| | - Dawn Nolt
- Division of Pediatric Infectious Diseases, Doernbecher Children's Hospital, Oregon Health & Science University, Portland, OR
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Laub K, Kristóf K, Tirczka T, Tóthpál A, Kardos S, Kovács E, Sahin-Tóth J, Horváth A, Dobay O. First description of a catalase-negative Staphylococcus aureus from a healthy carrier, with a novel nonsense mutation in the katA gene. Int J Med Microbiol 2017; 307:431-434. [PMID: 29089242 DOI: 10.1016/j.ijmm.2017.10.011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2017] [Revised: 10/23/2017] [Accepted: 10/24/2017] [Indexed: 10/18/2022] Open
Abstract
We have screened 2568 healthy individuals (mostly children) for Staphylococcus aureus and Streptococcus pneumoniae nasal carriage between 2010 and 2012. Out of the isolated 751 S. aureus strains, we found one methicillin-sensitive catalase-negative S. aureus (CNSA). Our CNSA isolate possessed a novel nonsense point mutation in the katA gene leading to early truncation of the protein product. The strain was resistant to penicillin and erythromycin, but sensitive to all other tested antibiotics and carried the enterotoxin A gene. It belonged to sequence type 5 (ST5), which is a successful, worldwide spread, usually MRSA clone. Catalase has been described as a virulence factor strictly required for nasal colonisation, and this is the first case contradicting this theory, as all previous CNSA isolates derived from infections. This is the first report of a CNSA from a symptomless carrier as well as the first occurrence in Hungary.
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Affiliation(s)
- Krisztina Laub
- Institute of Medical Microbiology, Semmelweis University, H-1089 Budapest, Hungary.
| | - Katalin Kristóf
- Institute of Laboratory Medicine, Semmelweis University, Budapest, Hungary.
| | - Tamás Tirczka
- Department 1 of Bacteriology, National Public Health Institute, Budapest, Hungary.
| | - Adrienn Tóthpál
- Institute of Medical Microbiology, Semmelweis University, H-1089 Budapest, Hungary.
| | - Szilvia Kardos
- Institute of Medical Microbiology, Semmelweis University, H-1089 Budapest, Hungary.
| | - Eszter Kovács
- Institute of Medical Microbiology, Semmelweis University, H-1089 Budapest, Hungary.
| | - Judit Sahin-Tóth
- Institute of Medical Microbiology, Semmelweis University, H-1089 Budapest, Hungary.
| | - Andrea Horváth
- Institute of Medical Microbiology, Semmelweis University, H-1089 Budapest, Hungary.
| | - Orsolya Dobay
- Institute of Medical Microbiology, Semmelweis University, H-1089 Budapest, Hungary.
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Lagos J, Alarcón P, Benadof D, Ulloa S, Fasce R, Tognarelli J, Aguayo C, Araya P, Parra B, Olivares B, Hormazábal JC, Fernández J. Novel nonsense mutation in the katA gene of a catalase-negative Staphylococcus aureus strain. Braz J Microbiol 2016; 47:177-80. [PMID: 26887242 PMCID: PMC4822749 DOI: 10.1016/j.bjm.2015.11.012] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2014] [Accepted: 08/08/2015] [Indexed: 11/18/2022] Open
Abstract
We report the first description of a rare catalase-negative strain of Staphylococcus aureus in Chile. This new variant was isolated from blood and synovial tissue samples of a pediatric patient. Sequencing analysis revealed that this catalase-negative strain is related to ST10 strain, which has earlier been described in relation to S. aureus carriers. Interestingly, sequence analysis of the catalase gene katA revealed presence of a novel nonsense mutation that causes premature translational truncation of the C-terminus of the enzyme leading to a loss of 222 amino acids. Our study suggests that loss of catalase activity in this rare catalase-negative Chilean strain is due to this novel nonsense mutation in the katA gene, which truncates the enzyme to just 283 amino acids.
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Affiliation(s)
| | | | - Dona Benadof
- Public Health Institute, Clinical Laboratory, Hospital Roberto del Río, Chile
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Molecular Characterization of a Catalase-Negative Staphylococcus aureus Blood Culture Isolate. J Clin Microbiol 2015; 53:3699-701. [PMID: 26354811 DOI: 10.1128/jcm.01271-15] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2015] [Accepted: 09/01/2015] [Indexed: 11/20/2022] Open
Abstract
Here we report a catalase-negative methicillin-sensitive Staphylococcus aureus isolate collected from a blood culture. Sequencing through the gene encoding catalase, katA, demonstrated a 2-bp insertion. The resulting frameshift mutation generates a protein that has lost 26 amino acids (aa) at its C-terminal domain.
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9
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Corrente M, Ventrella G, Greco MF, Martella V, Parisi A, Buonavoglia D. Characterisation of a catalase-negative methicillin-resistant Staphylococcus aureus isolate from a dog. Vet Microbiol 2013; 167:734-6. [DOI: 10.1016/j.vetmic.2013.09.020] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2013] [Revised: 09/10/2013] [Accepted: 09/13/2013] [Indexed: 01/27/2023]
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10
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Molecular characterization of a catalase-negative methicillin-susceptible Staphylococcus aureus subsp. aureus strain collected from a patient with cutaneous abscess. J Clin Microbiol 2013; 52:344-6. [PMID: 24131694 DOI: 10.1128/jcm.02455-13] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
We describe a cutaneous abscess caused by catalase-negative methicillin-susceptible Staphylococcus aureus subsp. aureus in a patient who was concomitantly colonized with virulent USA300 methicillin-resistant S. aureus (MRSA). Sequencing of the katA gene demonstrated a thymine insertion leading to a frameshift mutation and premature truncation of catalase to 21 amino acids.
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11
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Catalase-negative Staphylococcus lugdunensis strain with a novel point mutation in the catalase gene isolated from a patient with chronic suppurative otitis media. J Clin Microbiol 2013; 51:1310-2. [PMID: 23345293 DOI: 10.1128/jcm.02879-12] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
This report describes the results of the sequence analysis of a methicillin-susceptible strain of catalase-negative Staphylococcus lugdunensis. Molecular characterization of the deduced sequence revealed a novel point mutation in the catalase gene. To our knowledge, this is the first report of a catalase-negative S. lugdunensis strain, although catalase-negative isolates of Staphylococcus aureus and Staphylococcus epidermidis have been previously reported.
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Staphylococcus aureus subespecie aureus catalasa negativa: un nuevo caso en España. Enferm Infecc Microbiol Clin 2011; 29:708-9. [DOI: 10.1016/j.eimc.2011.05.018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2011] [Revised: 05/12/2011] [Accepted: 05/19/2011] [Indexed: 11/15/2022]
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13
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Recovery of a catalase-negative Staphylococcus epidermidis strain in blood and urine cultures from a patient with pyelonephritis. J Clin Microbiol 2011; 49:4018-9. [PMID: 21900516 DOI: 10.1128/jcm.01031-11] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
This report describes a 60-year-old patient with bilateral nephrolithiasis. A catalase-negative Staphylococcus epidermidis strain was recovered from both urine and blood cultures. Although rare, isolates of catalase-negative Staphylococcus spp., including Staphylococcus aureus, have been reported. Here, we describe the first report of a catalase-negative S. epidermidis strain.
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Molecular characterization of a catalase-negative Staphylococcus aureus subsp. aureus Strain collected from a patient with mitral valve endocarditis and pericarditis revealed a novel nonsense mutation in the katA gene. J Clin Microbiol 2011; 49:3398-402. [PMID: 21715584 DOI: 10.1128/jcm.00849-11] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
We report a case of endocarditis and pericarditis caused by catalase-negative Staphylococcus aureus. Molecular characterization revealed a novel nonsense mutation in the katA gene, leading to a loss of 238 amino acids (47% of the wild-type catalase protein), including the heme-binding site, NADPH-binding region, and Tyr-337, essential for catalysis.
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Dezfulian A, Salehian MT, Amini V, Dabiri H, Azimirad M, Aslani MM, Zali MR, Fazel I. Catalase-negative Staphylococcus aureus isolated from a diabetic foot ulcer. IRANIAN JOURNAL OF MICROBIOLOGY 2010; 2:165-7. [PMID: 22347567 PMCID: PMC3279781] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Abstract
We report a catalase-negative Staphylococcus aureus isolated from a 56-year-old male diabetic patient with foot ulcer who attended our surgery ward. Species identification was confirmed by Gram staining, standard biochemical tests and PCR amplification of the nuc and fem genes. Antibiotic susceptibility showed that the strain was sensitive to imepenem, chloramphenicol, amoxicillin, vancomycin and resistant to oxacillin, penicillin, ceftriaxone, erythromycin, clindamycin, and amikacin. Clinicians and microbiologists must be encouraged to identify and report these atypical strains and the infections associated with them in order to establish their role in pathogenesis.
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Affiliation(s)
- A Dezfulian
- Research Center for Gastroenterology and Liver Diseases, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - MT Salehian
- Department of General Vascular Surgery, Taleghani Hospital, Tehran, Iran
| | - V Amini
- Department of General Vascular Surgery, Taleghani Hospital, Tehran, Iran
| | - H Dabiri
- Research Center for Gastroenterology and Liver Diseases, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - M Azimirad
- Research Center for Gastroenterology and Liver Diseases, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - MM Aslani
- Research Center for Gastroenterology and Liver Diseases, Shahid Beheshti University of Medical Sciences, Tehran, Iran,Department of Microbiology, Pasteur Institute of Iran,Corresponding author: Mohammad Mehdi Aslani Ph.D. Address: Department of Microbiology, Pasture Institute of Iran, Tehran, Iran. Tel: +98 -2166405535. Fax: +98-2166465132. E-mail:
| | - MR Zali
- Research Center for Gastroenterology and Liver Diseases, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - I Fazel
- Department of General Vascular Surgery, Taleghani Hospital, Tehran, Iran
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The catalase gene differentiates between some strains of Staphylococcus aureus ssp. anaerobius. Folia Microbiol (Praha) 2010; 55:211-4. [PMID: 20526831 DOI: 10.1007/s12223-010-0030-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2009] [Revised: 12/03/2009] [Indexed: 10/19/2022]
Abstract
Staphylococcus aureus ssp anaerobius strain S10 was isolated from an outbreak of sheep abscess disease. Sequence of the catalase gene of this strain showed 99% identity to the catalase gene (katB) sequence of the reference strain (S. aureus ssp. anaerobius strain MVF213) with mismatching of three base pairs. An important substitution located 1036 nucleotides upstream of the initiation codon from "C" in katB to "T" in the catalase gene of strain S10 originated a stop codon. The deduced protein (345 amino acids) is 105 amino acids shorter than that of katB. Partial sequence of the catalase gene of other 8 local isolates in addition to another reference strain (DSM 20714/ATCC 35844) revealed the same mutations in all local (African) strains, whereas the sequence of the reference (European) strain was typical to that of katB. Sequence of the catalase gene of S. aureus ssp. anaerobius strain S10 was deposited in GenBank under accession no. EU281993.
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Böttcher T, Sieber SA. Showdomycin as a Versatile Chemical Tool for the Detection of Pathogenesis-Associated Enzymes in Bacteria. J Am Chem Soc 2010; 132:6964-72. [DOI: 10.1021/ja909150y] [Citation(s) in RCA: 67] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Thomas Böttcher
- Center for Integrated Protein Science Munich (CIPSM), Department of Chemistry and Biochemistry, Ludwig-Maximilians-Universität München, Butenandtstrasse 5-13, 81377 Munich, Germany
| | - Stephan A. Sieber
- Center for Integrated Protein Science Munich (CIPSM), Department of Chemistry and Biochemistry, Ludwig-Maximilians-Universität München, Butenandtstrasse 5-13, 81377 Munich, Germany
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18
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Catalase-negative Staphylococcus aureus strain with point mutations in the katA gene. J Clin Microbiol 2008; 46:2060-1. [PMID: 18385434 DOI: 10.1128/jcm.02300-07] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Methicillin-susceptible catalase-negative Staphylococcus aureus strain UCN61 was isolated from an arterial leg ulcer. The deduced sequence of the structural katA gene for the catalase was 99% identical to those of other S. aureus strains. Two mutations were identified in katA from S. aureus UCN61, including one leading to a substitution of key histidine 58 by a tyrosine.
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