Linked Life Data

7284386

Source:http://linkedlifedata.com/resource/pubmed/id/7284386

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
2
pubmed:dateCreated
1981-12-21
pubmed:abstractText
A proton NMR study at 360 MHz and 500 MHz was carried out on the tetranucleoside triphosphate d(TAAT) at a temperature of 27 degrees C. Extensive decoupling experiments allowed a complete and unambiguous spectral assignment. The data are interpreted in terms of the N and S deoxyribose pseudorotational ranges. From the observed proton-proton coupling constants it is calculated that (a) the populations of deoxyribose S-form are as follows: dT(1)-, 85%; -dA(2)-, 97%; -dA(3)-, 81%; -dT(4), 64%; and (b) the g+ populations (backbone notation) along the exocyclic C4'-C5' bond in -dA(2)-, -dA(3)- and dT(4) are 82%, 86% and 78%, respectively. From these values, combined with chemical shift considerations, it is concluded that the central -dA(2)-dA(3)- part of the molecule occurs preferentially as a mixture of two right-handed single-helical conformations, denoted S-S and S-N, in a ratio of approximately 8 : 2. This situation closely mimics that found for the 3'-end of d(A-A-A) (Olsthoorn, C.S.M., Bostelaar, L.J., Van Boom, J. H. and Altona, C. (1980) Eur. J. Biochem 112, 95--110). Similarly, the conformational behavior of the dT(1)-dA(2)- and -dA(3)-dT(4) terminals appears roughly identical to that displayed by the corresponding dinucleoside monophosphates. The molecules as a whole does not show signs of cooperatively of stacking.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Sep
pubmed:issn
0006-3002
pubmed:author
pubmed:issnType
Print
pubmed:day
28
pubmed:volume
655
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
256-64
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
1981
pubmed:articleTitle
Complete assignment and conformational analysis of a deoxyribotetranucleotide. d(TAAT). A 360 and 500 Mhz NMR study.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't