ArticleThe Journal of biological chemistry2010
Double strand break unwinding and resection by the mycobacterial helicase-nuclease AdnAB in the presence of single strand DNA-binding protein (SSB).
Article in The Journal of biological chemistry, 2010. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 23 papers.
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
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Who cites it
23 citing papers in PubMed, 35 citations in OpenAlex.
- dUTPase modulates mycobacterial homologous recombination and interacts with the AdnAB helicase-nuclease.Nucleic acids research · 2026Article
- Structure of an initiation complex of mycobacterial helicase-nuclease AdnAB at a blunt double-strand break reveals local melting that engages the 3' tracking strand at the ratchet pawl of the helicase motor.Nucleic acids research · 2026Article
- Rescuing the bacterial replisome at a nick requires recombinational repair and helicase reloading.Nature communications · 2025Article
- Structure-activity relationships at a nucleobase-stacking tryptophan required for chemomechanical coupling in the DNA resecting motor-nuclease AdnAB.Nucleic acids research · 2022Article
- Clutch mechanism of chemomechanical coupling in a DNA resecting motor nuclease.Proceedings of the National Academy of Sciences of the United States of America · 2021Article
- Structures and single-molecule analysis of bacterial motor nuclease AdnAB illuminate the mechanism of DNA double-strand break resection.Proceedings of the National Academy of Sciences of the United States of America · 2019Article
- Modeling DNA Unwinding by AddAB Helicase-Nuclease and Modulation by Chi Sequences: Comparison with AdnAB and RecBCD.Cellular and molecular bioengineering · 2019Article
- How Does a Helicase Unwind DNA? Insights from RecBCD Helicase.BioEssays : news and reviews in molecular, cellular and developmental biology · 2018Review
- The DNA Repair Repertoire of Mycobacterium smegmatis FenA Includes the Incision of DNA 5' Flaps and the Removal of 5' Adenylylated Products of Aborted Nick Ligation.Journal of bacteriology · 2017Article
- Homologous recombination mediated by the mycobacterial AdnAB helicase without end resection by the AdnAB nucleases.Nucleic acids research · 2017Article
- Single-molecule imaging reveals the mechanism of Exo1 regulation by single-stranded DNA binding proteins.Proceedings of the National Academy of Sciences of the United States of America · 2016Article
- Mycobacterium smegmatis HelY Is an RNA-Activated ATPase/dATPase and 3'-to-5' Helicase That Unwinds 3'-Tailed RNA Duplexes and RNA:DNA Hybrids.Journal of bacteriology · 2015Article
- RecF and RecR Play Critical Roles in the Homologous Recombination and Single-Strand Annealing Pathways of Mycobacteria.Journal of bacteriology · 2015Article
- Molecular and Functional Characterization of RecD, a Novel Member of the SF1 Family of Helicases, from Mycobacterium tuberculosis.The Journal of biological chemistry · 2015Article
- The adnAB locus, encoding a putative helicase-nuclease activity, is essential in Streptomyces.Journal of bacteriology · 2014Article
- The CRISPR-associated Cas4 protein Pcal_0546 from Pyrobaculum calidifontis contains a [2Fe-2S] cluster: crystal structure and nuclease activity.Nucleic acids research · 2014Article
- Characterization of three mycobacterial DinB (DNA polymerase IV) paralogs highlights DinB2 as naturally adept at ribonucleotide incorporation.Nucleic acids research · 2014Article
- Mycobacterium smegmatis Lhr Is a DNA-dependent ATPase and a 3'-to-5' DNA translocase and helicase that prefers to unwind 3'-tailed RNA:DNA hybrids.The Journal of biological chemistry · 2013Article
- A dual role for mycobacterial RecO in RecA-dependent homologous recombination and RecA-independent single-strand annealing.Nucleic acids research · 2013Article
- Structural and mechanistic insight into DNA unwinding by Deinococcus radiodurans UvrD.PloS one · 2013Article
Corrections and comments
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Authors and funding
2 authors at 1 institution in 1 country.
Funding
Abstract
Mycobacterial AdnAB is a heterodimeric DNA helicase-nuclease and 3' to 5' DNA translocase implicated in the repair of double strand breaks (DSBs). The AdnA and AdnB subunits are each composed of an N-terminal motor domain and a C-terminal nuclease domain. Inclusion of mycobacterial single strand DNA-binding protein (SSB) in reactions containing linear plasmid dsDNA allowed us to study the AdnAB helicase under conditions in which the unwound single strands are coated by SSB and thereby prevented from reannealing or promoting ongoing ATP hydrolysis. We found that the AdnAB motor catalyzed processive unwinding of 2.7-11.2-kbp linear duplex DNAs at a rate of ∼250 bp s(-1), while hydrolyzing ∼5 ATPs per bp unwound. Crippling the AdnA phosphohydrolase active site did not affect the rate of unwinding but lowered energy consumption slightly, to ∼4.2 ATPs bp(-1). Mutation of the AdnB phosphohydrolase abolished duplex unwinding, consistent with a model in which the "leading" AdnB motor propagates a Y-fork by translocation along the 3' DNA strand, ahead of the "lagging" AdnA motor domain. By tracking the resection of the 5' and 3' strands at the DSB ends, we illuminated a division of labor among the AdnA and AdnB nuclease modules during dsDNA unwinding, whereby the AdnA nuclease processes the unwound 5' strand to liberate a short oligonucleotide product, and the AdnB nuclease incises the 3' strand on which the motor translocates. These results extend our understanding of presynaptic DSB processing by AdnAB and engender instructive comparisons with the RecBCD and AddAB clades of bacterial helicase-nuclease machines.
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Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.