ArticleBio-protocol2021
Characterize the Interaction of the DNA Helicase PriA with the Stalled DNA Replication Fork Using Atomic Force Microscopy.
Article in Bio-protocol, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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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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4 authors at 1 institution in 1 country.
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Abstract
In bacteria, the restart of stalled DNA replication forks requires the DNA helicase PriA. PriA can recognize and remodel abandoned DNA replication forks, unwind DNA in the 3'-to-5' direction, and facilitate the loading of the helicase DnaB onto the DNA to restart replication. ssDNA-binding protein (SSB) is typically present at the abandoned forks, protecting the ssDNA from nucleases. Research that is based on the assays for junction dissociation, surface plasmon resonance, single-molecule FRET, and x-ray crystal structure has revealed the helicase activity of PriA, the SSB-PriA interaction, and structural information of PriA helicase. Here, we used Atomic Force Microscopy (AFM) to visualize the interaction between PriA and DNA substrates with or without SSB in the absence of ATP to delineate the substrate recognition pattern of PriA before its ATP-catalyzed DNA-unwinding reaction. The protocol describes the steps to obtain high-resolution AFM images and the details of data analysis and presentation.
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