Letters in Applied Microbiology

Cover image for Vol. 63 Issue 6

Early View (Online Version of Record published before inclusion in an issue)

Edited By: J.-Y. Maillard

Impact Factor: 1.579

ISI Journal Citation Reports © Ranking: 2015: 96/123 (Microbiology); 106/161 (Biotechnology & Applied Microbiology)

Online ISSN: 1472-765X

Associated Title(s): Journal of Applied Microbiology

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  1. Original Articles

    1. Isolation of a new antibacterial peptide actinokineosin from Actinokineospora spheciospongiae based on genome mining

      N. Takasaka, I. Kaweewan, M. Ohnishi-Kameyama and S. Kodani

      Version of Record online: 6 DEC 2016 | DOI: 10.1111/lam.12693

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      Significance and Impact of the Study: Genome mining is a powerful tool to find new bioactive compounds from the genome database. In this report, we succeeded in isolation and structure determination of a new antibacterial peptide named actinokineosin based on genome mining.

    2. Anti-Rhodotorula activity of mycophenolic acid enhanced in the presence of polyene antibiotic nystatin

      H. Kinoshita, S. Wongsuntornpoj, F. Ihara and T. Nihira

      Version of Record online: 6 DEC 2016 | DOI: 10.1111/lam.12692

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      Significance and Impact of the Study: This study aimed to screen active compounds against Rhodotorula species that are resistant to a candin family of antifungal agents, from entomopathogenic fungi. Assuming that most of the latent antifungal compounds do not exert their activity due to their inability to penetrate the membrane, we took advantage of polyene nystatin in the screening to increase permeability through the fungal cell membrane. The result of the screening revealed hidden antifungal activity of mycophenolic acid, demonstrating that the method applied in this study unlocks the potentials of bioresources, and proposes a new remedy for mycosis.

    3. Efficient biosynthesis of d-ribose using a novel co-feeding strategy in Bacillus subtilis without acid formation

      J. Cheng, W. Zhuang, N.N. Li, C.L. Tang and H.J. Ying

      Version of Record online: 6 DEC 2016 | DOI: 10.1111/lam.12685

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      Significance and Impact of the Study: Bacillus subtilis usually produce d-ribose accompanied by plenty of organic acids when glucose is used as a carbon source, which is considered to be a consequence of mismatched glycolytic and tricarboxylic acid cycle capacities. This is the first study to provide high-efficiency biosynthesis of d-ribose without organic acid formation in B. subtilis, which would be lower than the cost of separation and purification. The strain transketolase-deficient B. subtilis CGMCC 3720 can be potentially applied to the production of d-ribose in industry.

    4. Spoilage potential characterization of Shewanella and Pseudomonas isolated from spoiled large yellow croaker (Pseudosciaena crocea)

      Y. Ge, J. Zhu, X. Ye and Y. Yang

      Version of Record online: 4 DEC 2016 | DOI: 10.1111/lam.12687

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      Significance and Impact of the Study: Members of the bacterial genera Shewanella and Pseudomonas are widely known to be responsible for the specific spoilers in iced fish. Ten strains isolated from spoiled large yellow croaker (Pseudosciaena crocea) were identified as Shewanella baltica and Pseudomonas spp. S. baltica was demonstrated as the predominant spoiler in the refrigerated P. crocea due to its high metabolic activities. This work has generated baseline information for a better understanding of the role of various spoilage bacteria in chilled marine fish and for the control of contamination and growth of main spoilage bacteria to extend the shelf life of marine fish.

    5. Raw ready-to-eat seafood safety: microbiological quality of the various seafood species available in fishery, hyper and online markets

      H.W. Kim, Y.J. Hong, J.I. Jo, S.D. Ha, S.H. Kim, H.J. Lee and M.S. Rhee

      Version of Record online: 4 DEC 2016 | DOI: 10.1111/lam.12688

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      Significance and Impact of the Study: Raw ready-to-eat seafood products like sashimi can be easily contaminated with various bacteria from aquatic environments and human reservoirs, which subsequently bring about a risk in food poisoning due to no heating process before consumption. The results of this study provide comprehensive microbiological data on various species of raw ready-to-eat seafood from various distribution channels. It may contribute to establish reasonable standard and effective strategies to ensure a good microbiological quality of raw ready-to-eat seafood for the safety of meals, like sashimi and sushi.

    6. Stress of algicidal substances from a bacterium Exiguobacterium sp. h10 on Microcystis aeruginosa

      Y. Li, L. Liu, Y. Xu, P. Li, K. Zhang, X. Jiang, T. Zheng and H. Wang

      Version of Record online: 28 NOV 2016 | DOI: 10.1111/lam.12678

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      Significance and Impact of the Study: In this study, the effects of algicidal substances from an algicidal bacterium Exiguobacterium sp. h10 on the toxic cyanobacterium, Microcystis aeruginosa 7820, were first investigated. The algicidal mode of action was confirmed as an indirect attack through the production of algicidal substances. The characteristics of the algicidal substance were determined, especially the functional groups analysis that confirmed the algicidal substances were glycolipid mixtures. With the stress of algicidal substances, the algal chlorophyll a synthesis, cell structure and morphology were seriously damaged. This study proved that algicidal bacteria are promising sources of potential cyanobacterial bloom-control, and provided good procedures for the identification and analysis of an algicidal bacterium and substances.

  2. Review Articles

    1. You have free access to this content
      Update on: Shigella new serogroups/serotypes and their antimicrobial resistance

      D.P. Muthuirulandi Sethuvel, N.K. Devanga Ragupathi, S. Anandan and B. Veeraraghavan

      Version of Record online: 28 NOV 2016 | DOI: 10.1111/lam.12690

  3. Original Articles

    1. Utilization of algal sugars and glycerol for enhanced cephalosporin C production by Acremonium chrysogenum M35

      J.H. Lee, H.Y. Yoo, X. Yang, D.S. Kim, J.H. Lee, S.K. Lee, S.O. Han and S.W. Kim

      Version of Record online: 28 NOV 2016 | DOI: 10.1111/lam.12684

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      Significance and Impact of the Study: Microalgae are the biomass containing various components, such as carbohydrates, lipids, and amino acids. In this study, carbon sources contained in microalgae were obtained by acid extraction, and cephalosporin C (CPC), a β-lactam antibiotic intermediate, was produced by using Acremonium chrysogenum M35. In addition, the increase of CPC production was not distinct for A. chrysogenum M35 with algal sugars as the only carbon source; therefore, glycerol was added, increasing the CPC production. Thus, cheap residues such as algal sugars form microalgal and glycerol form biodiesel process could be used as the alternative sources for the production of various products.

    2. Copper as an antibacterial material in different facilities

      J. Inkinen, R. Mäkinen, M.M. Keinänen-Toivola, K. Nordström and M. Ahonen

      Version of Record online: 28 NOV 2016 | DOI: 10.1111/lam.12680

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      Significance and Impact of the Study: The efficiency of copper as an antimicrobial material has been noted in laboratory studies and in the hospital environment. The present study further shows that copper exerted an antibacterial effect in different facilities, i.e. in a hospital, a kindergarten, an office building and in a retirement home for the elderly. The study suggests that copper has potential use as an antibacterial material and therefore might serve as a means to lower the incidence of transmission of infectious agents from inanimate surfaces in different facilities, with everyday functions.

    3. Low temperature and dust favour in vitro survival of Mycoplasma hyopneumoniae: time to revisit indirect transmission in pig housing

      C. Browne, A. Loeffler, H.R. Holt, Y.M. Chang, D.H. Lloyd and A. Nevel

      Version of Record online: 24 NOV 2016 | DOI: 10.1111/lam.12689

      Significance and Impact of the Study: Understanding the transmission of Mycoplasma hyopneumoniae and optimizing biosecurity practices are keys to reducing the use of antimicrobial agents to control this pathogen. Direct transmission of the pathogen between pigs is the main route of spread and its lack of cell wall may compromise its resilience outside the host. The results from our study show that M. hyopneumoniae can survive for up to several days on dry surfaces and therefore may have the potential to infect pigs by indirect transmission. Factors influencing the survival of M. hyopneumoniae outside the host are further elucidated.

    4. Inhibition of Escherichia coli ribosome subunit dissociation by chloramphenicol and Blasticidin: a new mode of action of the antibiotics

      B.K. Pathak, S. Mondal and C. Barat

      Version of Record online: 24 NOV 2016 | DOI: 10.1111/lam.12686

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      Significance and Impact of the Study: Ribosome synthesizes protein in all organisms and is the target for multiple antimicrobial agents. Our study demonstrates that chloramphenicol and blasticidin S that target the peptidyl transferase centre of the bacterial ribosome can then inhibit dissociation of 70S ribosome mediated by (i) unfolded protein, (ii) translation factors or (iii) low Mg+2 concentrations in vitro and thereby suppresses ribosomal degradation during carbon starvation in vivo. The demonstration of this new mode of action furthers the understanding of these broad-spectrum antibiotics that differentially inhibit protein synthesis in prokaryotic and eukaryotic cells.

    5. Cellulose acetate-based composites with antimicrobial properties from embedded molybdenum trioxide particles

      S. Shafaei, J. Dörrstein, J.P. Guggenbichler and C. Zollfrank

      Version of Record online: 24 NOV 2016 | DOI: 10.1111/lam.12670

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      Significance and Impact of the Study: In this study, development of a novel thermoplastic bio-based composite with excellent antimicrobial surface properties is investigated. To the best of our knowledge, this is the first report to evaluate the antimicrobial properties of molybdenum trioxide embedded into a cellulose acetate as biopolymer matrix. The developed composites might step up to innovative applications used in modern medical and public environments.

  4. Review Articles

    1. You have free access to this content
      Biotechnological impact of stress response on wine yeast

      E. Matallana and A. Aranda

      Version of Record online: 21 NOV 2016 | DOI: 10.1111/lam.12677

  5. Original Articles

    1. Citrobacter freundii as a test platform for recombinant cellulose degradation systems

      S.S. Lakhundi, K.O. Duedu, N. Cain, R. Nagy, J. Krakowiak and C.E. French

      Version of Record online: 21 NOV 2016 | DOI: 10.1111/lam.12668

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      Significance and Impact of the Study: Biofuels have been shown to be the best sustainable and alternative source of fuel to replace fossil fuels. Of the different types of feedstocks used for producing biofuels, lignocellulosic biomass is the most abundant. Converting this biomass to useful products has met with little success. Different approaches are being used and microbial platforms are the most promising and sustainable method. This study shows that Citrobacter freundii is a better test platform than Escherichia coli for testing various combinations of cellulases for the development of microbial systems for biomass conversion.

    2. Rapid and visual Chlamydia trachomatis detection using loop-mediated isothermal amplification and hydroxynaphthol blue

      I. Choopara, N. Arunrut, W. Kiatpathomchai, D. Dean and N. Somboonna

      Version of Record online: 21 NOV 2016 | DOI: 10.1111/lam.12675

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      Significance and Impact of the Study: Chlamydia trachomatis is the major bacterial sexually transmitted disease worldwide. The clinical symptoms are broad, and chronic C. trachomatis infections could lead to blindness, ectopic pregnancy, sterility in males and females, and a higher risk of the development of cervical cancer. The result indicates the potential usefulness of our crude DNA lysis coupled loop-mediated isothermal amplification with hydroxynaphthol blue for a simple, rapid, specific, sensitive and cost-effective assay for C. trachomatis detection from suspected specimens. This assay offers an alternative in the clinical diagnosis of C. trachomatis in resource-limited health-care facilities and clinical laboratories in developing countries, and in field tests.

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