Results 211 to 220 of about 95,624 (263)

Calculations of nucleic acid conformations

Current Opinion in Structural Biology, 1996
The present computational power and sophistication of theoretical approaches to nucleic acid structural investigation are sufficient for the realization of static and dynamic models that correlate accurately with current crystallographic, NMR and solution-probing structural data, and consequently are able to provide valuable insights and predictions ...
Auffinger, Pascal, Louise-May, Shirley, Westhof, Eric   +2 more
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Exploring the conformations of nucleic acids

Journal of Functional Programming, 1995
Abstract This paper presents an application of functional programming in the field of molecular biology: exploring the conformations of nucleic acids. The Nucleic Acid three-dimensional structure determination problem (NA3D) and a constraint satisfaction algorithm are ...
Marcel Turcotte, Guy Lapalme, François Major   +2 more
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Conformations of double-helical nucleic acids

Nature, 1976
A KNOWLEDGE of possible conformational states of double-helical nucleic acids is fundamental to an understanding of how they work1,2. Models for a series of conformations have been made on the basis of X-ray data3–5. Investigations of nucleic acids in solution point to the existence of a continuum of forms but do not make possible the quantitative ...
V E, Khutorsky, V I, Poltev
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The conformations of locked nucleic acids (LNA)

Journal of Molecular Recognition, 2000
We have used 2D NMR spectroscopy to study the sugar conformations of oligonucleotides containing a conformationally restricted nucleotide (LNA) with a 2'-O, 4'-C-methylene bridge. We have investigated a modified 9-mer single stranded oligonucleotide as well as three 9- and 10-mer modified oligonucleotides hybridized to unmodified DNA.
Petersen, Michael B., Nielsen, Christina B., Nielsen, Katrine E., Jensen, Gitte A., Bondensgaard, Kent, Singh, Sanjay Kumar, Rajwanshi, Vivek Kumar, Koshkin, Alexei, Dahl, Britta Mynster, Wengel, Jesper Thagaard, Jacobsen, Jens Peter   +10 more
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Two contiguous conformations in a nucleic acid duplex

Nature, 1978
DNA CONFORMATIONS and properties depend on DNA sequence and on environmental conditions1–3. It has been suggested that specific regulatory sites on DNA might have unique secondary conformations2. Conformational transitions, and the propagation of these transitions along a DNA helix, have been proposed as mechanistic steps in RNA transcription4 and DNA ...
E, Selsing, R D, Wells, T A, Early, D R, Kearns   +3 more
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Forces involved in the Conformational Stability of Nucleic Acids

Nature, 1969
ONE of the most important problems in research on nucleic acid is the understanding of the forces which maintain the helical structure. After the elucidation of the double helix by Watson and Crick1, the helical secondary structure of DNA was thought to derive its stability from hydrogen bonding between the base pair. The discovery that polynucleotides
J C, Maurizot, J, Brahms, F, Eckstein
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Conformational Flexibility of Nucleic Acids

1983
In consideration of the importance of conformational flexibility to the functioning of nucleic acids, NMR studies have been carried out to elucidate aspects of dynamics with molecular Mechanics calculations providing supplementary insight. Analysis of 31P and 13C NMR relaxation data in terms of plausible motions in a DNA helix indicate that winding and
Thomas L. James, Peter Bendel, Jacqueline L. James, Joe W. Keepers, Peter A. Kollman, Aviva Lapidot, Joseph Murphy-Boesch, John E. Taylor   +7 more
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Conformational properties of nucleic acids in solution

International Journal of Quantum Chemistry, 2009
Principles which govern the conformational properties of nucleic acid structures in aqueous solution are derived from extensive nuclear magnetic resonance studies of nucleic acid components. These principles are then utilized to project the solution conformation of tRNA.
Ramaswamy H. Sarma, Steven S. Danyluk
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Conformation of Viral Nucleic Acids in Situ

1969
Publisher Summary The problems that are discussed in this chapter are confined to viruses, and to be more exact, to the question of similarities and differences between the structure and properties of usual forms of nucleic acids in solution and that of nucleic acids inside viral particles.
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Conformational geometry and vibrational frequencies of nucleic acid chains

Biopolymers, 1975
AbstractNormal coordinate analysis of diethyl phosphate has been made, which predicts all observed Raman frequencies in the range 170–1300 cm−1. The force constants from this calculation have been transferred to a vibrational calculation for a simplified model of the backbone of nucleic acids, which also involves the OPO2−O phosphate group and the ...
E B, Brown, W L, Peticolas
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