To examine whether methylation of the GATC sites present in the dnaA promoter region is responsible for the strict temporal coordination of initiation events at oriC as measured by the synchrony of initiation, we introduced point mutations eliminating three (TGW1) and five (TGW2) of the six GATC sites present in the dnaA promoter region. All of the strains containing these mutations, including the one with five GATC sites eliminated, initiated chromosomal replication synchronously.
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http://dx.doi.org/10.1128/JB.00089-06 | DOI Listing |
Nucleic Acids Res
December 2024
Université Paris Cité, CNRS, Inserm, Institut Cochin, F-75014 Paris, France.
Mol Oral Microbiol
December 2024
Faculty of Dentistry, University of Toronto, Toronto, Ontario, Canada.
Streptococcus mutans, a key player in dental caries, faces multiple environmental challenges within the oral cavity, including oxidative stress, nutrient scarcity, and acidic pH. To survive and thrive, S. mutans has evolved intricate mechanisms, including the CSP-ComDE quorum sensing system, which coordinates responses to environmental cues.
View Article and Find Full Text PDFACS Cent Sci
September 2023
School of Public Health, Department of Radiation and Medical Oncology, Zhongnan Hospital of Wuhan University, Wuhan University, Wuhan 430071, China.
-Methyladenine (6mA) is a naturally occurring DNA modification in both prokaryotes and eukaryotes. Herein, we developed a deaminase-mediated sequencing (DM-seq) method for genome-wide mapping of 6mA at single-nucleotide resolution. The method capitalizes on the selective deamination of adenine, but not 6mA, in DNA mediated by an evolved adenine deaminase, ABE8e.
View Article and Find Full Text PDFFront Microbiol
March 2023
Department of Microbiology, University of Delhi South Campus, New Delhi, India.
DNA methylation events mediated by orphan methyltransferases modulate various cellular processes like replication, repair and transcription. Bacteria and archaea also harbor DNA methyltransferases that are part of restriction-modification systems, which serve to protect the host genome from being cleaved by the cognate restriction enzyme. While DNA methylation has been exhaustively investigated in bacteria it remains poorly understood in archaea.
View Article and Find Full Text PDFMicroorganisms
March 2023
Department of Plant and Microbial Biology, North Carolina State University, Raleigh, NC 27695, USA.
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