Tang GQ, Tanaka N, Kunugi S. In vitro increases in plasmid DNA supercoiling by hydrostatic pressure.
BIOCHIMICA ET BIOPHYSICA ACTA 1998;
1443:364-8. [PMID:
9878829 DOI:
10.1016/s0167-4781(98)00244-9]
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Abstract
By conducting topoisomerase I-mediating supercoiling assays, effects of elevated pressure on DNA supercoiling were investigated for the first time. It was found that pressure elevations induced a progressive increase in plasmid DNA linking numbers, winding the DNA duplex by a magnitude of 1.1-1.6x10(-3) angular degree/base/MPa. Implications for the findings were discussed in terms of disturbance of the tertiary structure of DNA by elevated pressure.
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