Calculation of the twist and the writhe for representative models of DNA.
Calculation of the twist and the writhe for representative models of DNA.
复制标题
计算 DNA 代表性模型的扭曲和扭动。
DOI:
10.1016/0022-2836(86)90513-9
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发表时间:
1986
影响因子:
5.6
通讯作者:
Bauer,WR
中科院分区:
文献类型:
--
作者:
White,JH;Bauer,WR
The geometric quantities twist (Tw) and writhe (Wr) are of primary importance for a complete description of the structure of DNA. In the case of a closed circular DNA, the sum ofTwandWris constant and equal to the linking number,Lk. In this paper we present a general method for calculation of the twist in terms of a pair of curves and a correspondence surface that joins them. The twist of any pair of curves (C1and C2) may take on different values depending upon their ordering, and in generalTw(C1, C2)is not equal toTw(C2, C1). We describe four models that may be taken to represent the structure of DNA and compute the twist for both orderings in each case. The four models examined are: I, a regular helix about a linear axis; II, a toroidal helix about a closed circular axis; III, a superhelix about a regular helical axis; and IV, a superhelix about a closed toroidal helix. In cases II and IV these results are also used to calculateLkandWr. Case III is used to analyze the winding of DNA in a nucleosome.
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DOI:
10.1016/s1874-6047(08)60344-3
发表时间:
1981
期刊:
The Enzymes
影响因子:
--
作者:
James C. Wang
通讯作者:
James C. Wang
影响因子:
4.4
作者:
Uberbacher,EC;Bunick,GJ
通讯作者:
Bunick,GJ
影响因子:
0.5
作者:
BANCHOFF, TF;WHITE, JH
通讯作者:
WHITE, JH
影响因子:
64.5
作者:
M. Shure;J. Vinograd
通讯作者:
J. Vinograd
影响因子:
5.6
作者:
HOROWITZ, DS;WANG, JC
通讯作者:
WANG, JC