. Author manuscript; available in PMC: 2010 May 26.

Published in final edited form as: Biochemistry. 2009 May 26;48(20):4247–4253. doi: 10.1021/bi900194e

Table 2.

DNA helical parameters ^a relating consecutive base pairs of structure 1.^b

Base-pair	Shift (Å)	Slide (Å)	Rise (Å)	Tilt (°)	Roll (°)	Twist (°)
CG/CG	0.8	2.2	3.4	12.0	−1.6	37.6
GG/CC	−0.3	2.7	3.2	−6.1	5.7	34.3
GA/TC	-	-	-	-	-	-
AA/TT	−1.3	1.2	3.3	−4.7	3.8	37.6
AT/AT	0.0	0.1	3.4	1.3	−0.7	29.6
TT/AA	1.3	1.0	3.4	2.2	5.6	36.1
TC/GA	-	-	-	-	-	-
CC/GG	0.4	2.7	3.3	4.7	6.5	34.5
CG/CG	−1.0	2.5	3.2	−8.2	2.1	37.3

B-DNA	−0.1	−0.8	3.3	−1.3	−3.6	36

Geometrical relationships between consecutive base pairs: shift, translation into the groove; slide, translation toward the phosphodiester backbone; rise, translation along the helix axis; tilt, rotation about the pseudo-two-fold axis relating the DNA strands; roll, rotation about a vector between the C1′ atoms; and twist, rotation about the helix axis.

Data were calculated by using the program 3DNA.²⁹