A novel transposon belonging to the Tn-like family was identified on the chromosome of a commensal strain of sequence type 2343 (ET02). Tn is 7,367 bp long and harbors eight open reading frames (ORFs), an ATPase (IS family), a transposase (DDE catalytic type), a Tn resolvase, three hypothetical proteins, and genes encoding the new pyocin S8 with its immunity protein. We show that pyocin S8 displays activity against carbapenemase-producing , including IMP-1, SPM-1, VIM-1, GES-5, and KPC-2 producers.
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http://dx.doi.org/10.1128/AAC.00100-17 | DOI Listing |
Microbiol Spectr
January 2025
Instituto de Medicina Tropical Alexander von Humboldt, Universidad Peruana Cayetano Heredia, Lima, Peru.
The emergence of carbapenem-resistant (CRKP) poses a significant public health threat, particularly in low- and middle-income countries (LMICs) with limited surveillance and treatment options. This study examines the genetic diversity, resistance patterns, and transmission dynamics of 66 CRKP isolates recovered over 5 years (2015-2019) after the first case of CRKP was identified at a tertiary care hospital in Lima, Peru. Our findings reveal a shift from to as the dominant carbapenemase gene after 2017.
View Article and Find Full Text PDFNat Commun
January 2025
Division of Genome Analysis Platform Development, National Cancer Center Research Institute, Tokyo, Japan.
Genomic variants causing abnormal splicing play important roles in genetic disorders and cancer development. Among them, variants that cause the formation of novel splice-sites (splice-site creating variants, SSCVs) are particularly difficult to identify and often overlooked in genomic studies. Additionally, these SSCVs are frequently considered promising candidates for treatment with splice-switching antisense oligonucleotides (ASOs).
View Article and Find Full Text PDFGenome Biol Evol
January 2025
Institute of Bioinformatics, University of Georgia, 120 E. Green St., Athens, GA, USA.
Horizontal transposon transfer (HTT) plays an important role in the evolution of eukaryotic genomes, however the detailed evolutionary history and impact of most HTT events remain to be elucidated. To better understand the process of HTT in closely related microbial eukaryotes, we studied Ty4 retrotransposon subfamily content and sequence evolution across the genus Saccharomyces using short- and long-read whole genome sequence data, including new PacBio genome assemblies for two S. mikatae strains.
View Article and Find Full Text PDFNucleic Acids Res
January 2025
CSSB Centre for Structural Systems Biology, Deutsches Elektronen-Synchrotron DESY, Notkestr. 85, 22607 Hamburg, Germany.
Dinucleases of the DEDD superfamily, such as oligoribonuclease, Rexo2 and nanoRNase C, catalyze the essential final step of RNA degradation, the conversion of di- to mononucleotides. The active sites of these enzymes are optimized for substrates that are two nucleotides long, and do not discriminate between RNA and DNA. Here, we identified a novel DEDD subfamily, members of which function as dedicated deoxydinucleases (diDNases) that specifically hydrolyze single-stranded DNA dinucleotides in a sequence-independent manner.
View Article and Find Full Text PDFMicroorganisms
December 2024
National Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan 430070, China.
() is characterized by a reduced genomic size and limited synthetic capacity, including the inability to synthesize nucleotides de novo, relies on nucleases for nutrient acquisition and survival. A number of nucleases have been implicated in pathogenicity, facilitating substrate degradation and contributing to DNA repair mechanisms that enhance bacterial persistence. The present study confirmed that the T5.
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