Quantifying DNA melting transitions using single-molecule force spectroscopy.
Quantifying DNA melting transitions using single-molecule force spectroscopy.
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DOI:
10.1088/0953-8984/21/3/034114
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发表时间:
2009-01-21
期刊:
影响因子:
--
通讯作者:
Kiang CH
中科院分区:
文献类型:
--
作者:
Calderon CP;Chen WH;Lin KJ;Harris NC;Kiang CH
We stretched a DNA molecule using atomic force microscope and quantified the mechanical properties associated with B and S forms of double-stranded DNA (dsDNA), molten DNA, and single-stranded DNA (ssDNA). We also fit overdamped diffusion models to the AFM time series and used these models to extract additional kinetic information about the system. Our analysis provides additional evidence supporting the view that S-DNA is a stable intermediate encountered during dsDNA melting by mechanical force. In addition, we demonstrated that the estimated diffusion models can detect dynamical signatures of conformational degrees of freedom not directly observed in experiments.
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