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Quorum sensing signals of the grapevine crown gall bacterium, sp. Rr2-17: use of inducible expression and polymeric resin to sequester acyl-homoserine lactones.
PeerJ
December 2024
The Thomas H. Gosnell School of Life Sciences, Biotechnology and Molecular Bioscience Program, College of Science, Rochester Institute of Technology, Rochester, New York, United States.
Background: A grapevine crown gall tumor strain, sp. strain Rr2-17 was previously reported to accumulate copious amounts of diverse quorum sensing signals during growth. Genome sequencing identified a single luxI homolog in strain Rr2-17, suggesting that it may encode for a AHL synthase with broad substrate range, pending functional validation.
View Article and Find Full Text PDFExpression and purification of recombinant tilapia lake virus segment 4 protein and its in-vitro biological activity for potential use in vaccine development.
Sci Rep
December 2024
Department of Biotechnology, Faculty of Agro-industry, Kasetsart University, Bangkok, 10900, Thailand.
Tilapia lake virus (TiLV) disease is highly contagious and causes substantial mortality in tilapia. Currently, no effective treatments or commercial vaccines are available to prevent TiLV infection. In this study, TiLV segment 4 (S4) was cloned into the pET28a(+)vector and transformed into Escherichia coli BL21(DE3).
View Article and Find Full Text PDFRapid and precise treatment selection for antimicrobial-resistant infection enabled by a nano-dilution SlipChip.
Biosens Bioelectron
December 2024
School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai, 200030, China; Zhengzhou Industrial Technology Research Institute of Shanghai Jiao Tong University, Zhengzhou, 450016, China. Electronic address:
Antimicrobial resistance (AMR) has become an increasingly severe threat to global health, and AMR-associated infection is one of the leading causes of death around the world. Due to the long turnaround time and the limited flexibility and availability of current antimicrobial susceptibility testing (AST) methods, a large portion of patients with bacterial infections are still treated empirically, increasing the risk of mistreatment. To address the demand for precision treatment of bacterial infections, we developed a nano-dilution SlipChip (nd-SlipChip)-based systematic evaluation method, which facilitates rapid, logic feedback for the assessment of antibiotics, antibiotic combinations, and phage therapy.
View Article and Find Full Text PDFBioluminescent Pseudomonas aeruginosa and Escherichia coli for whole-cell screening of antibacterial and adjuvant compounds.
Sci Rep
December 2024
Department of Microbiology and Immunology, McGill University, Montreal, QC, Canada.
Continued efforts to discover new antibacterial molecules are critical to achieve a robust pre-clinical pipeline for new antibiotics. Screening of compound or natural product extract libraries remains a widespread approach and can benefit from the development of whole cell assays that are robust, simple and versatile, and allow for high throughput testing of antibacterial activity. In this study, we created and validated two bioluminescent reporter strains for high-throughput screening, one in Pseudomonas aeruginosa, and another in a hyperporinated and efflux-deficient Escherichia coli.
View Article and Find Full Text PDFThe Multifunctional Catalytic Hemoglobin from : Protocols on Isolation, Taxonomic Identification, Protein Extraction, Purification, and Characterization.
Methods Protoc
December 2024
Department of Natural Sciences, University of South Carolina Beaufort, 1 University Boulevard, Bluffton, SC 29909, USA.
The multifunctional catalytic hemoglobin from the terebellid polychaete , also named dehaloperoxidase (DHP), utilizes the typical oxygen transport function in addition to four observed activities involved in substrate oxidation. The multifunctional ability of DHP is presently a rare observation, and there exists a limitation for how novel dehaloperoxidases can be identified from macrobenthic infauna. In order to discover more infaunal DHP-bearing candidates, we have devised a facilitated method for an accurate taxonomic identification that places visual and molecular taxonomic approaches in parallel.
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