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- W4290989874 abstract "The bacterial FtsK motor harvests energy from ATP to translocate double-stranded DNA during cell division. Here, we probe the molecular mechanisms underlying coordinated DNA translocation in FtsK by performing long timescale simulations of its hexameric assembly and individual subunits. From these simulations we predict signaling pathways that connect the ATPase active site to DNA-gripping residues, which allows the motor to coordinate its translocation activity with its ATPase activity. Additionally, we utilize well-tempered metadynamics simulations to compute free-energy landscapes that elucidate the extended-to-compact transition involved in force generation. We show that nucleotide binding promotes a compact conformation of a motor subunit, whereas the apo subunit is flexible. Together, our results support a mechanism whereby each ATP-bound subunit of the motor conforms to the helical pitch of DNA, and ATP hydrolysis/product release causes a subunit to lose grip of DNA. By ordinally engaging and disengaging with DNA, the FtsK motor unidirectionally translocates DNA." @default.
- W4290989874 created "2022-08-13" @default.
- W4290989874 creator A5055588060 @default.
- W4290989874 creator A5084515376 @default.
- W4290989874 date "2022-08-10" @default.
- W4290989874 modified "2023-10-17" @default.
- W4290989874 title "Molecular dynamics of DNA translocation by FtsK" @default.
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- W4290989874 doi "https://doi.org/10.1093/nar/gkac668" @default.
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