Molecular structure of nicked DNA: a substrate for DNA repair enzymes.Aymami, J., Coll, M., van der Marel, G.A., van Boom, J.H., Wang, A.H., Rich, A.
(1990) Proc.Natl.Acad.Sci.USA 87: 2526-2530
- PubMed: 2320572
- PubMed Abstract:
- Molecular Structure of the Netropsin-d(CGCGATATCGCG) Complex. DNA Conformation in an Alternating AT Segment
Coll, M.,Aymami, J.,Van Der Marel, G.A.,Van Boom, J.H.,Rich, A.,Wang, A.H.-J.
(1989) Biochemistry 28: 310
- A Bifurcated Hydrogen-Bonded Conformation in the d(*A(dot)*T) Base Pairs of the DNA Dodecamer d(CGCAAATTTGCG) and Its Complex With Distamycin
Coll, M.,Frederick, C.A.,Wang, A.H.-J.,Rich, A.
(1987) Proc.Natl.Acad.Sci.USA 84: 8385
- Crystal Structure Analysis of a Complete Turn of B-DNA
Wing, R.,Drew, H.,Takano, T.,Broka, C.,Tanaka, S.,Itakura, K.,Dickerson, R.E.
(1980) Nature 287: 755
The molecular structure of a nicked dodecamer DNA double helix, made of a ternary system containing d(CGCGAAAACGCG) + d(CGCGTT) + d(TTCGCG) oligonucleotides, has been determined by x-ray diffraction analysis at 3 A resolution. The molecule adopts a B ...
The molecular structure of a nicked dodecamer DNA double helix, made of a ternary system containing d(CGCGAAAACGCG) + d(CGCGTT) + d(TTCGCG) oligonucleotides, has been determined by x-ray diffraction analysis at 3 A resolution. The molecule adopts a B-DNA conformation, not unlike those found in intact dodecamer DNA molecules crystallized in a somewhat different crystal lattice, despite a gap due to the absence of a phosphate group in the molecule. The helix has a distinct narrow minor groove near the center of the molecule at the AAAA region. This suggests that the internal stabilizing forces due to base stacking and hydrogen-bonding interactions are sufficient to overcome the loss of connectivity associated with the disruption of the covalent backbone of DNA.
Department of Biology, Massachusetts Institute of Technology, Cambridge 02139.