A nucleotide binding rectification Brownian ratchet model for translocation of Y-family DNA polymerases
2011
Brownian Ratchet Model for Y-family DNA Polymerases
publication
Evidence: moderate
Author Information
Author(s): Xie Ping
Primary Institution: Institute of Physics, Chinese Academy of Sciences
Hypothesis
Can a Brownian ratchet model explain the translocation of Y-family DNA polymerases?
Conclusion
The study presents a Brownian ratchet model that effectively explains the translocation mechanisms of Y-family DNA polymerases.
Supporting Evidence
- The model explains the fast translocation event upon dNTP binding for Dpo4.
- Different features of the structures for Dpo4, Dbh, and polymerase ι can be explained using the model.
- The model predicts the DNA synthesis rate versus external force for Dpo4 and Dbh polymerases.
Takeaway
This study shows how certain DNA polymerases can move along DNA and fix mistakes, using a special model to explain their movements.
Methodology
The study modifies a previous Brownian ratchet model to apply to Y-family DNA polymerases, explaining their translocation based on nucleotide binding.
Digital Object Identifier (DOI)
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