keyword
MENU ▼
Read by QxMD icon Read
search

bacteriocin

keyword
https://www.readbyqxmd.com/read/28229214/diversity-of-lactic-acid-bacteria-associated-with-banana-fruits-in-taiwan
#1
Yi-Sheng Chen, Yu-Jou Liao, Yi-Shan Lan, Hui-Chung Wu, Fujitoshi Yanagida
Banana is a popular fruit worldwide. The lactic acid bacteria (LAB) microflora in banana fruits has not been studied in detail. A total of 164 LAB were isolated from banana fruits in Taiwan. These isolates were initially divided into nine groups (r1 to r9) using restriction fragment length polymorphism analysis and 16S ribosomal DNA sequencing. Isolates belonging to Lactobacillus plantarum group were further divided into three additional groups using multiplex PCR assay targeting the recA gene. The most common bacterial genera found in banana fruits were Lactobacillus and Weissella...
February 22, 2017: Current Microbiology
https://www.readbyqxmd.com/read/28223456/a-natural-chimeric-pseudomonas-bacteriocin-with-novel-pore-forming-activity-parasitizes-the-ferrichrome-transporter
#2
Maarten G K Ghequire, Lieselore Kemland, Ernesto Anoz-Carbonell, Susan K Buchanan, René De Mot
Modular bacteriocins represent a major group of secreted protein toxins with a narrow spectrum of activity, involved in interference competition between Gram-negative bacteria. These antibacterial proteins include a domain for binding to the target cell and a toxin module at the carboxy terminus. Self-inhibition of producers is provided by coexpression of linked immunity genes that transiently inhibit the toxin's activity through formation of bacteriocin-immunity complexes or by insertion in the inner membrane, depending on the type of toxin module...
February 21, 2017: MBio
https://www.readbyqxmd.com/read/28221886/technological-properties-and-biogenic-amines-production-by-bacteriocinogenic-lactococci-and-enterococci-strains-isolated-from-raw-goat-s-milk
#3
Luana Martins Perin, Simona Belviso, Barbara Dal Bello, Luís Augusto Nero, Luca Cocolin
Technological properties and biogenic amine production were analyzed in 56 bacteriocinogenic lactococci and enterococci strains isolated from raw goat's milk. Fifteen lactococci strains were able to reduce milk pH to 5.3 or lower after 6 h, while enterococci strains were initially slow in producing acids. Lactococcus lactis subsp. lactis GLc06 and three strains of Enterococcus faecalis (GEn20, GEn22, and GEn23) presented high proteolytic activity. L. lactis subsp. lactis GLc06 and E. faecalis GEn22 also showed a high percentage of autolysis after only 4 h, reaching 71...
January 2017: Journal of Food Protection
https://www.readbyqxmd.com/read/28216302/long-term-antimicrobial-effect-of-nisin-released-from-electrospun-triaxial-fiber-membranes
#4
Daewoo Han, Shalli Sherman, Shaun Filocamo, Andrew J Steckl
: Electrospun membranes encapsulating nisin in the core of multi-layer coaxial fibers, with a hydrophobic PCL intermediate layer and a hygroscopic cellulose acetate sheath, have been demonstrated to provide long-term antimicrobial activity combined with a hygroscopic outer layer. Antimicrobial performance has been evaluated using modified versions of the antimicrobial textile test AATCC 100 and AATCC 147 against Staphylococcus aureus. The AATCC 147 tests indicate that antimicrobial activity persists up to 7 days...
February 16, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/28213030/high-hydrostatic-pressure-effects-on-listeria-monocytogenes-and-l-innocua-evidence-for-variability-in-inactivation-behaviour-and-in-resistance-to-pediocin-bacha-6111-2
#5
Carolina Bruschi, Norton Komora, Sónia Marília Castro, Jorge Saraiva, Vânia Borges Ferreira, Paula Teixeira
The effect of high hydrostatic pressure (HHP) on the survival of 14 strains of Listeria monocytogenes from food or clinical origins, selected to represent different pheno and genotypes, was evaluated. Stationary phase cells were submitted to 300, 400 and 500 MPa at 10 °C, for 5 min. A high variability in the resistance of L. monocytogenes to pressure was observed, and particularly two strains isolated from food were significantly more baroresistant than the rest. Strains of L. monocytogenes resistant to one or more antibiotics exhibited significantly higher levels of survival after the high pressure treatment at 400 MPa...
June 2017: Food Microbiology
https://www.readbyqxmd.com/read/28197131/bacillus-spp-isolated-from-puba-as-a-source-of-biosurfactants-and-antimicrobial-lipopeptides
#6
Karla J Perez, Jaime Dos Santos Viana, Fernanda C Lopes, Jamile Q Pereira, Daniel M Dos Santos, Jamil S Oliveira, Renata V Velho, Silvia M Crispim, Jacques R Nicoli, Adriano Brandelli, Regina M D Nardi
Several products of industrial interest are produced by Bacillus, including enzymes, antibiotics, amino acids, insecticides, biosurfactants and bacteriocins. This study aimed to investigate the potential of two bacterial isolates (P5 and C3) from puba, a regional fermentation product from cassava, to produce multiple substances with antimicrobial and surface active properties. Phylogenetic analyses showed close relation of isolates P5 and C3 with Bacillus amyloliquefaciens and Bacillus thuringiensis, respectively...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28194143/novel-immunity-proteins-associated-with-colicin-m-like-bacteriocins-exhibit-promiscuous-protection-in-pseudomonas
#7
Maarten G K Ghequire, Lieselore Kemland, René De Mot
Bacteriocins related to colicin M, acting via cleavage of the cell wall precursor lipid II, have been characterized in γ- and β-proteobacteria. Depending on the species, immunity is provided by either an inner membrane-anchored periplasmic protein or by an integral membrane protein. In Pseudomonas however, the immunity partner of colicin M-like bacteriocins remains unknown. Based on an in silico analysis in pseudomonad genomes, we here identify a gene encoding a putative immunity partner that represents a novel type of integral membrane protein (PmiA, Pseudomonas colicin M-like immunity type A)...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28167557/the-enterocin-as-48-as-an-evidence-for-the-use-of-bacteriocins-as-new-leishmanicidal-agents
#8
María Ángeles Abengózar, Rubén Cebrián, José María Saugar, Teresa Gárate, Eva Valdivia, Manuel Martínez-Bueno, Mercedes Maqueda, Luis Rivas
We report the feasibility of enterocin AS-48, a circular cationic peptide produced by Enterococcus faecalis, as a new leishmanicidal agent. AS-48 is lethal on Leishmania promastigotes as well as on axenic and intracellular amastigotes at low micromolar concentrations, with scarce cytotoxicity on macrophages. AS-48 induced a fast bioenergetic collapse of L. donovani promastigotes, but only a partial permeation of their plasma membrane with limited entrance of vital dyes, even at concentrations beyond its full lethality...
February 6, 2017: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/28167518/pleiotropic-regulation-of-virulence-genes-in-streptococcus-mutans-by-a-conserved-small-protein-sprv
#9
Manoharan Shankar, Mohammad S Hossain, Indranil Biswas
: Streptococcus mutans, an oral pathogen associated with dental caries, colonizes tooth surfaces as polymicrobial biofilms, known as dental plaque. S. mutans expresses several virulence factors that allow the organism to tolerate environmental fluctuations and to compete with other microorganisms. We recently identified that a small hypothetical protein (90 amino acids) was essential for normal growth of the bacterium. Inactivation of the gene SMU.2137 encoding this protein caused a significant growth defect and loss of various virulence-associated functions...
February 6, 2017: Journal of Bacteriology
https://www.readbyqxmd.com/read/28165017/bet-hedging-in-bacteriocin-producing-escherichia-coli-populations-the-single-cell-perspective
#10
Bihter Bayramoglu, David Toubiana, Simon van Vliet, R Fredrik Inglis, Nadav Shnerb, Osnat Gillor
Production of public goods in biological systems is often a collaborative effort that may be detrimental to the producers. It is therefore sustainable only if a small fraction of the population shoulders the cost while the majority reap the benefits. We modelled this scenario using Escherichia coli populations producing colicins, an antibiotic that kills producer cells' close relatives. Colicin expression is a costly trait, and it has been proposed that only a small fraction of the population actively expresses the antibiotic...
February 6, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28163828/potential-probiotic-associated-traits-revealed-from-completed-high-quality-genome-sequence-of-lactobacillus-fermentum-3872
#11
Burhan Lehri, Alan M Seddon, Andrey V Karlyshev
The article provides an overview of the genomic features of Lactobacillus fermentum strain 3872. The genomic sequence reported here is one of three L. fermentum genome sequences completed to date. Comparative genomic analysis allowed the identification of genes that may be contributing to enhanced probiotic properties of this strain. In particular, the genes encoding putative mucus binding proteins, collagen-binding proteins, class III bacteriocin, as well as exopolysaccharide and prophage-related genes were identified...
2017: Standards in Genomic Sciences
https://www.readbyqxmd.com/read/28161626/turning-hydrophilic-bacteria-into-biorenewable-hydrophobic-material-with-potential-antimicrobial-activity-via-interaction-with-chitosan
#12
Orakan Hanpanich, Pravit Wongkongkatep, Thunyarat Pongtharangkul, Jirarut Wongkongkatep
Alteration of a bacteriocin-producing hydrophilic bacterium, Lactococcus lactis IO-1, into a hydrophobic material with potential antimicrobial activity using chitosan was investigated and compared with five other bacterial species with industrial importance. The negatively charged bacterial cells were neutralized by positively charged chitosan, resulting in a significant increase in the hydrophobicity of the bacterial cell surface. The largest Gram-positive B. megaterium ATCC 14581 showed a moderate response to chitosan while the smaller E...
January 27, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28156183/listeriolysin-s-a-bacteriocin-from-epidemic-listeria-monocytogenes-strains-that-targets-the-microbiota
#13
Juan-José Quereda-Torres, Jazmín Meza-Torres, Pascale Cossart, Javier Pizarro-Cerdá
Listeria monocytogenes is a Gram-positive food-borne pathogen that in humans may traverse the intestinal, placental and blood/brain barriers, causing gastroenteritis, abortions and meningitis. Crossing of these barriers is dependent on the bacterial ability to enter host cells, and several L. monocytogenes surface and secreted virulence factors are known to facilitate entry and the intracellular lifecycle. The study of L. monocytogenes strains associated to human listeriosis epidemics has revealed the presence of novel virulence factors...
February 3, 2017: Gut Microbes
https://www.readbyqxmd.com/read/28128651/the-importance-of-lactic-acid-bacteria-for-the-prevention-of-bacterial-growth-and-their-biogenic-amines-formation-a-review
#14
Fatih Özogul, Imen Hamed
Foodborne pathogens (FBP) represent an important threat to the consumers' health as they are able to cause different foodborne diseases. In order to eliminate the potential risk of those pathogens, lactic acid bacteria (LAB) have received a great attention in the food biotechnology sector since they play an essential function to prevent bacterial growth and reduce the biogenic amines formation. The foodborne illnesses (diarrhea, vomiting, and abdominal pain etc.) caused by those microbial pathogens is due to various reasons, one of them is related to the decarboxylation of available amino acids that lead to biogenic amines (BAs) production...
January 27, 2017: Critical Reviews in Food Science and Nutrition
https://www.readbyqxmd.com/read/28126938/draft-genome-sequence-of-weissella-confusa-mbf8-1-a-glucansucrase-and-bacteriocin-producing-strain-isolated-from-a-homemade-soy-product
#15
Nicholas C K Heng, Chia-Wen Yeh, Amarila Malik
We report here the draft genome sequence of Weissella confusa MBF8-1, an isolate from a homemade fermented soybean product that produces sucrases and exhibits antibacterial (bacteriocin) activity. The draft genome of W. confusa MBF8-1 comprises a 2.2-Mbp chromosome and a 17.8-kbp bacteriocin-encoding plasmid. Two putative glucansucrase genes were also identified.
January 26, 2017: Genome Announcements
https://www.readbyqxmd.com/read/28125655/assessing-the-genotypic-differences-between-strains-of-corynebacterium-pseudotuberculosis-biovar-equi-through-comparative-genomics
#16
Rafael A Baraúna, Rommel T J Ramos, Adonney A O Veras, Kenny C Pinheiro, Leandro J Benevides, Marcus V C Viana, Luís C Guimarães, Judy M Edman, Sharon J Spier, Vasco Azevedo, Artur Silva
Seven genomes of Corynebacterium pseudotuberculosis biovar equi were sequenced on the Ion Torrent PGM platform, generating high-quality scaffolds over 2.35 Mbp. This bacterium is the causative agent of disease known as "pigeon fever" which commonly affects horses worldwide. The pangenome of biovar equi was calculated and two phylogenomic approaches were used to identify clustering patterns within Corynebacterium genus. Furthermore, other comparative analyses were performed including the prediction of genomic islands and prophages, and SNP-based phylogeny...
2017: PloS One
https://www.readbyqxmd.com/read/28117830/use-of-the-soft-agar-overlay-technique-to-screen-for-bacterially-produced-inhibitory-compounds
#17
Kevin L Hockett, David A Baltrus
The soft-agar overlay technique was originally developed over 70 years ago and has been widely used in several areas of microbiological research, including work with bacteriophages and bacteriocins, proteinaceous antibacterial agents. This approach is relatively inexpensive, with minimal resource requirements. This technique consists of spotting supernatant from a donor strain (potentially harboring a toxic compound(s)) onto a solidified soft agar overlay that is seeded with a bacterial test strain (potentially sensitive to the toxic compound(s))...
January 14, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28115354/characterization-of-class-iia-bacteriocin-resistance-in-enterococcus-faecium
#18
Kathryn Geldart, Yiannis N Kaznessis
Vancomycin-resistant enterococci, particularly resistant E. faecium, pose an escalating threat in nosocomial environments because of their innate resistance to many antibiotics, including vancomycin, a treatment of last resort. Many class IIa bacteriocins strongly target these enterococci and may offer a potential alternative for the management of this pathogen. However, E. faecium's resistance to these peptides remains relatively uncharacterized. Herein, we explore the development of resistance of E. faecium to a cocktail of three class IIa bacteriocins; Enterocin A, Enterocin P, and Hiracin JM79...
January 23, 2017: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/28113050/mutations-near-the-cleavage-site-of-enterocin-nkr-5-3b-prepeptide-revealed-new-insights-into-its-biosynthesis
#19
Rodney Honrada Perez, Haruki Sugino, Naoki Ishibashi, Takeshi Zendo, Pongtep Wilaipun, Vichien Leelawatcharamas, Jiro Nakayama, Kenji Sonomoto
Enterocin NKR-5-3B is a 64-residue novel circular bacteriocin synthesized from an 87-residue prepeptide. Albeit through a still unknown mechanism, the EnkB1234 biosynthetic enzyme complex processes the prepeptide to yield its mature active, circular form. To gain insights into the key region/residue that plays a role in Ent53 maturation, several mutations near the cleavage site on the precursor peptide were generated. The interaction of the precursor peptide and EnkB1234 appeared to be hydrophobic in nature...
January 22, 2017: Microbiology
https://www.readbyqxmd.com/read/28112691/positive-clinical-outcomes-derived-from-using-a-proprietary-mixture-of-selected-strains-during-pregnancy
#20
Francesco Di Pierro, Annamaria Parolari, Benedetta Brundu, Raffaele Nigro
BACKGROUND: While the use of antibiotic prophylaxis is clearly advantageous to prevent streptococcal infection, it alters the composition of the gut microbiota in mothers and infants. Enterococcus faecium L3 is one of the best studied probiotic strains and shows strong antagonistic activity against Streptococcus agalactiae due to the production of bacteriocins able to inhibit common gut and vaginal pathogens. METHODS: We tested an L3-based probiotic formula (iNatal®) on 127 pregnant women attending our gynaecological unit in 2015...
January 16, 2017: Acta Bio-medica: Atenei Parmensis
keyword
keyword
13964
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"