For the detailed molecular analysis, genomic modification, and application of acetic acid bacteria such as Gluconobacter in biotechnological processes, a simple markerless deletion system is essential. The available methods have either low efficiencies or their applicability is restricted to strains containing an upp mutation. We now developed a method based on counterselection by cytosine deaminase, encoded by the codA gene from Escherichia coli, in the presence of the fluorinated pyrimidine analogue 5-fluorocytosine (FC). The codA-encoded enzyme converts nontoxic FC to toxic 5-fluorouracil, which is channeled into the metabolism by the uracil phosphoribosyltransferase, encoded by the chromosomal upp gene of Gluconobacter. We found that the presence of E. coli codB, encoding a cytosine permease, was needed for a high efficiency of gene deletion. The system is applicable in wild-type strains because no preceding deletions are required. Based on the fact that a codA gene is absent and an upp gene is present in almost all acetic acid bacteria sequenced so far, the method should also be applicable for other genera of the Acetobacteraceae.
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http://dx.doi.org/10.1007/s00253-013-5164-7 | DOI Listing |
Life (Basel)
December 2024
Department of Translational Medical Sciences, Pediatric Section, Federico II University of Naples, 80131 Naples, Italy.
MyD88 deficiency is a rare inborn error of immunity (IEI) characterized by susceptibility to pyogenic infections without overt signs of inflammation. Half of the reported patients belong to Roma descent, an itinerant ethnic group living mostly in Europe, with an increased risk of childhood mortality due to limited access to healthcare services. We describe three unrelated patients from the Campania region in Italy with MyD88 deficiency, all belonging to Roma descent and displaying severe or recurrent infections in early infancy.
View Article and Find Full Text PDFInt J Mol Sci
January 2025
Department of Pathology and Laboratory Medicine, University of Kansas Medical Center, Kansas City, KS 66160, USA.
We analyzed the transcriptome data of wildtype and estrogen receptor β knockout () rat ovaries during the early postnatal period and detected remarkable changes in epigenetic regulators and transcription factors. Compared with postnatal day (PD) 4.5 ovaries, PD 6.
View Article and Find Full Text PDFInt J Mol Sci
January 2025
Neuroscience and Mental Health Innovation Institute, Cardiff University, Hadyn Ellis Building, Cardiff CF24 4HQ, UK.
Deletion and duplication in the human 16p11.2 chromosomal region are closely linked to neurodevelopmental disorders, specifically autism spectrum disorder. Data from neuroimaging studies suggest white matter microstructure aberrations across these conditions.
View Article and Find Full Text PDFInt J Mol Sci
January 2025
Institute for Biomedical Research and Innovation (IRIB), National Research Council (CNR), 90146 Palermo, Italy.
Anderson-Fabry (or Fabry) disease is a rare lysosomal storage disorder caused by a functional deficiency of the enzyme alpha-galactosidase A. The partial or total defect of this lysosomal enzyme, which is caused by variants in the gene, leads to the accumulation of glycosphingolipids, mainly globotriaosylceramide in the lysosomes of different cell types. The clinical presentation of Fabry disease is multisystemic and can vary depending on the specific genetic variants associated with the disease.
View Article and Find Full Text PDFMedicina (Kaunas)
January 2025
M2S (Laboratoire Mouvement, Sport, Santé)-EA 1274, University Rennes, 35000 Rennes, France.
The insertion/deletion (I/D) polymorphism in , the gene encoding the angiotensin-converting enzyme (ACE), has been suggested as a genetic variation that can influence exercise performance and risk of injury in elite athletes. The I allele has been associated with enhanced endurance performance and with reduced inflammation, while the D allele has been associated with improved performance in strength and power activities. However, the role of this genetic variant in the incidence of non-contact injury is underexplored.
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