| MUNZAROVÁ, Markéta a Vladimír SKLENÁŘ. Three-Bond Sugar-Base Couplings in Purine versus Pyrimidine Nucleosides: A DFT Study of Karplus Relationships for 3JC2/4-H1' and 3JC6/8-H1' in DNA. Journal of the American Chemical Society. Washington, D.C.: American Chemical Society, 2002, roč. 124, č. 36, s. 10666-10667. ISSN 0002-7863. |
Další formáty:
BibTeX
LaTeX
RIS
@article{405486,
author = {Munzarová, Markéta and Sklenář, Vladimír},
article_location = {Washington, D.C.},
article_number = {36},
keywords = {NUCLEIC-ACIDS; CONSTANTS; OLIGONUCLEOTIDES},
language = {eng},
issn = {0002-7863},
journal = {Journal of the American Chemical Society},
title = {Three-Bond Sugar-Base Couplings in Purine versus Pyrimidine Nucleosides: A DFT Study of Karplus Relationships for 3JC2/4-H1' and 3JC6/8-H1' in DNA},
volume = {124},
year = {2002}
}
TY - JOUR
ID - 405486
AU - Munzarová, Markéta - Sklenář, Vladimír
PY - 2002
TI - Three-Bond Sugar-Base Couplings in Purine versus Pyrimidine Nucleosides: A DFT Study of Karplus Relationships for 3JC2/4-H1' and 3JC6/8-H1' in DNA
JF - Journal of the American Chemical Society
VL - 124
IS - 36
SP - 10666
EP - 10666
PB - American Chemical Society
SN - 00027863
KW - NUCLEIC-ACIDS
KW - CONSTANTS
KW - OLIGONUCLEOTIDES
N2 - 3JC2/4-H1' and 3JC6/8-H1' scalar spin-spin coupling constants have been calculated for deoxyadenosine, deoxyguanosine, deoxycytidine, and deoxythymidine as functions of the glycosidic torsion angle c by means of density functional theory. Except for deoxythymidine, 3JC2/4-H1' depends little on the base type. On the contrary, 3JC6/8-H1' follow the usual trans to cis ratio (3JC-H(cis) < 3JC-H(trans)) for purine nucleosides but reveal the opposite relation (3JC-H(cis) > 3JC-H(trans)) for pyrimidine nucleosides. Our results compare well with the experiment for deoxyguanosine and predict a novel trend in the case of pyrimidine bases for which no NMR results are available in the syn region. A breakdown of the key Fermi contact part of 3JC6/8-H1' into MO contributions rationalizes this trend in terms of an unusual coupling mechanism in the syn orientation that is very effective for pyrimidine nucleosides and considerably weaker for purine nucleosides.
ER -
MUNZAROVÁ, Markéta a Vladimír SKLENÁŘ. Three-Bond Sugar-Base Couplings in Purine versus Pyrimidine Nucleosides: A DFT Study of Karplus Relationships for 3JC2/4-H1' and 3JC6/8-H1' in DNA. \textit{Journal of the American Chemical Society}. Washington, D.C.: American Chemical Society, 2002, roč.~124, č.~36, s.~10666-10667. ISSN~0002-7863.
|
