The dnd operon for DNA phosphorothioation modification system in Escherichia coli is located in diverse genomic islands
نویسندگان
چکیده
منابع مشابه
Phosphorothioation of DNA in bacteria by dnd genes.
Modifications of the canonical structures of DNA and RNA play critical roles in cell physiology, DNA replication, transcription and translation in all organisms. We now report that bacterial dnd gene clusters incorporate sulfur into the DNA backbone as a sequence-selective, stereospecific phosphorothioate modification. To our knowledge, unlike any other DNA or RNA modification systems, DNA phos...
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The Clarke-Carbon library with Escherichia coli DNA cloned into plasmid ColE1 was partially screened for Z-DNA with the monoclonal antibody Z-D11 using the retardation of the covalently closed circular DNA-protein complex by nitrocellulose filters. About 85% of the plasmids tested at "natural" supercoil density bound to the filter. Together with binding studies of the iodinated antibody, one Z-...
متن کاملdndDB: A Database Focused on Phosphorothioation of the DNA Backbone
BACKGROUND The Dnd DNA degradation phenotype was first observed during electrophoresis of genomic DNA from Streptomyces lividans more than 20 years ago. It was subsequently shown to be governed by the five-gene dnd cluster. Similar gene clusters have now been found to be widespread among many other distantly related bacteria. Recently the dnd cluster was shown to mediate the incorporation of su...
متن کاملA Novel Target of IscS in Escherichia coli: Participating in DNA Phosphorothioation
Many bacterial species modify their DNA with the addition of sulfur to phosphate groups, a modification known as DNA phosphorothioation. DndA is known to act as a cysteine desulfurase, catalyzing a key biochemical step in phosphorothioation. However, bioinformatic analysis revealed that 19 out of the 31 known dnd gene clusters, contain only four genes (dndB-E), lacking a key cysteine desulfuras...
متن کاملInteractions of Dnd proteins involved in bacterial DNA phosphorothioate modification
DNA phosphorothioation (PT) is the first discovered physiological DNA backbone modification, in which a non-bridging oxygen atom of the phosphodiester bond is replaced with a sulfur atom in Rp (rectus for plane) configuration. PT modification is governed by a highly conserved gene cluster dndA/iscS-dndBCDE that is widespread across bacterial and archaeal species. However, little is known about ...
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ژورنال
عنوان ژورنال: BMC Genomics
سال: 2015
ISSN: 1471-2164
DOI: 10.1186/s12864-015-1421-8