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Reversible bending and helix geometry in a B-DNA dodecamer: CGCGAATTBrCGCG.
Open accessAbstract
A double-helical B-DNA dodecamer has been analyzed by single crystal x-ray diffraction methods and refined independently in four variants: sequence CGCGAATTCGCG at 20 degrees C and at 16 K, and CGCGAATTBrCGCG in 60% methylpentanediol at 20 and at 7 degrees C. The first three forms show a 14-19 degrees bend in overall helix axis, but the fourth is straight and unbent. Detailed comparisons of the various forms have led to a better understanding of helix geometry and bending. Structural principles can be understood best if organized under four headings: 1) intrinsic geometry of the sugar rings, 2) stacking and relative motion of base pairs, 3) geometry of the connecting phosphate backbone, and 4) mechanics of bending in B-DNA. The observed bending is neither completely localized nor smooth and continuous, but an intermediate compromise that can be termed "annealed kinking."
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Cited by
The influence of DNA and nucleosome structure on integration events directed by HIV integrase
Pruss, D., Reeves, R., Bushman, F. D., & Wolffe, A. P. (1994) · Journal of Biological Chemistry · doi:10.1016/s0021-9258(17)31494-1 · Cited by 173
Lyamichev, V. (1991) · Nucleic Acids Research · doi:10.1093/nar/19.16.4491 · Cited by 45
Metadata
- Authors
- Fratini, A. V., Kopka, M. L., Drew, H. R., & Dickerson, R. E.
- Venue
- Journal of Biological Chemistry
- Publisher
- Elsevier BV
- Published
- 1982-12
- Volume
- 257
- Issue
- 24
- Pages
- 14686-14707
- ISSN
- 0021-9258 (ISSN-L)
- OpenAlex
- W1526944695
- Cited by
- 626
- References
- 0
- FWCI
- 11.46
- Type
- journal article
- Language
- en
- Open access
- hybrid
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- CoChat. (2026). Citation check: Reversible bending and helix geometry in a B-DNA dodecamer: CGCGAATTBrCGCG. https://app.cochat.ai/papers/10.1016/s0021-9258(18)33335-0
- The paper
- Fratini, A. V., Kopka, M. L., Drew, H. R., & Dickerson, R. E. (1982). Reversible bending and helix geometry in a B-DNA dodecamer: CGCGAATTBrCGCG. Journal of Biological Chemistry. https://doi.org/10.1016/s0021-9258(18)33335-0
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